IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0973763
(2004-10-25)
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등록번호 |
US-7281724
(2007-10-16)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
11 |
초록
▼
A wheel work chair has all the attributes and style of an office chair but is equipped with wheelchair-type supporting wheels The chair is height adjustable with the upper portion of the chair moving relative to the lower portion of the chair. Wheels connected to the upper portion of the chair move
A wheel work chair has all the attributes and style of an office chair but is equipped with wheelchair-type supporting wheels The chair is height adjustable with the upper portion of the chair moving relative to the lower portion of the chair. Wheels connected to the upper portion of the chair move with the chair seat as the height of the chair is adjusted. Wheels connected to the lower portion of the chair remain on the ground as the height of the chair is adjusted. A static surface is provided on the arm of a height adjustable chair to support the weight of a user while that chair is being raised.
대표청구항
▼
The invention claimed is: 1. A wheeled work chair comprising: a base comprising at least three floor contacting castors; wherein each castor swivels, and can contact and roll along a floor surface; a seat support mechanism positionally supported above said base; a chair seat supported above said se
The invention claimed is: 1. A wheeled work chair comprising: a base comprising at least three floor contacting castors; wherein each castor swivels, and can contact and roll along a floor surface; a seat support mechanism positionally supported above said base; a chair seat supported above said seat support mechanism and positioned by said seat support mechanism; an height adjustment mechanism disposed between said base and said chair seat, wherein said height adjustment mechanism is supported by said base; wherein said chair seat and said seat support mechanism are supportedly positioned by said height adjustment mechanism; wherein said height adjustment mechanism can move; wherein movement of said height adjustment mechanism can result in changing the position of said chair seat relative to said base; wherein said seat support mechanism is supported by said height adjustment mechanism, and secures said chair seat to said height adjustment mechanism; a wheel supporting mechanism secured to said wheeled work chair comprising first and second wheel support members, each wheel support member extending in opposite directions from each other; wherein each wheel support member comprises a first end; and a second end; wherein said first ends are secured to said wheeled work chair; a first wheel secured to said second end of said first wheel support member; and a second wheel secured to said second end of said second wheel support member; wherein each wheel can rotate in a substantially vertical plane; wherein said second ends of each wheel support member comprises a common axis upon which each wheel rotates substantially parallel to each other; wherein said first and second wheels cannot swivel in relationship to each other; and wherein each wheel comprises an outer diameter which can contact and roll along a floor surface; wherein said first and second wheels are positioned on said wheeled work chair convenient for a seated person to use his or her hands to move himself or herself about over a floor surface without use of his or her feet; wherein said wheeled work chair comprises an upper portion and a lower portion; wherein the position of said upper portion can be changed relative to said lower portion; wherein said lower portion comprises at least said base; wherein said upper portion comprises at least said seat support mechanism and said chair seat. 2. The wheeled work chair of claim 1, comprising a push-off arm rest supporting mechanism supported by said base; wherein said push-off arm rest supporting mechanism comprises first and second push-off arm rest supports extending upwardly from said push-off arm rest supporting mechanism, wherein each push-off arm rest support includes a first end, and a second end; wherein said first end of each push-off arm rest support is supported by said lower portion; first and second push-off arm rests disposed on respective second ends of said first and said second push-off arm rest supports; wherein a seated wheeled work chair user can grip said push-off arm rests with user's hands and push down thereon to reduce user's body weight from said chair seat and correspondingly reduce force to said height adjustment mechanism; wherein the position of said chair seat can be moved to change the body position of a person while said person's full body weight is supported on said wheeled work chair, at least upwardly relative to the floor. 3. The wheeled work chair of claim 2, comprising means to lock and unlock said upper and lower portions of said wheeled work chair; wherein when locked, relative change in elevation between said upper portion and said lower portion can be prevented, and when unlocked, relative change in elevation between said upper portion and said lower portion can be allowed; wherein said means comprises a remote actuation mechanism; wherein said remote actuation mechanism is supported on said push-off arm rest supporting mechanism and is so disposed that a person sitting on said chair seat can reach and move said remote actuation mechanism while keeping both hands on said push-off arm rest supporting mechanism. 4. The wheeled work chair of claim 2, wherein said spring comprises a movable resilient spring material; wherein when said upper portion of said wheeled work chair is moved toward said lower portion with sufficient force, said resilient spring material can be resiliently moved, wherein absent sufficient force, said resilient spring material can resiliently move resulting in moving said second portion away from said first portion, resulting in moving said seat support mechanism and correspondingly moving said chair seat away from said base. 5. The wheeled work chair of claim 1, wherein said height adjustment mechanism comprises a spring disposed between said base and said seat support mechanism. 6. The wheeled work chair of claim 5, wherein said spring comprises a non-locking gas spring comprising first and second telescoping sections; wherein said first section comprises a cylinder, and said second section comprises a piston rod disposed within said cylinder and extending outwardly therefrom; wherein said non-locking gas spring is disposed above said base and is supported by said base; wherein one of said first and second sections is secured to said seat support mechanism; wherein said movable spring material comprises pressurized gas disposed within said cylinder; and a fluid flow control valve disposed within said cylinder. 7. The wheeled work chair of claim 2, wherein said spring comprises a locking gas spring comprising a movable fluid flow control valve stem extending outwardly from said locking gas spring; and an actuation button comprising the outwardly extending end of said movable fluid flow control valve stem; wherein said actuation button can be moved from a first locked position to a second unlocked position; wherein said unlocked position allows relative longitudinal movement between said cylinder and said piston rod, wherein said locking gas spring is actuated. 8. The wheeled work chair of claim 7, wherein said wheeled work chair comprises an actuation mechanism for moving said actuation button from said first locked position to said second unlocked position resulting in actuating said locking gas spring. 9. The wheeled work chair of claim 7, wherein said wheeled work chair comprises a remote actuation mechanism for moving said actuation button; wherein said remote actuation mechanism comprises first and second ends; wherein said first end is disposed proximate said actuation button for movable engagement with said actuation button, and wherein said second end extends to a position proximate said push-off arm rest supporting mechanism; wherein said second end is supported by said push-off arm rest supporting mechanism and is so disposed that a person sitting on said chair seat can reach and move said remote actuation mechanism while keeping both hands on said push-off arm rest supporting mechanism. 10. The wheeled work chair of claim 1, wherein said height adjustment mechanism comprises at least one telescoping support mechanism which can contract and extend; wherein each telescoping support mechanism comprises a lower section supported by said base; and an upper section disposed in parallel alignment at least in part to each respective lower section; wherein each upper section of each telescoping support mechanism can move, toward and away from, each respective lower section; wherein said seat support mechanism secures said upper section of each telescoping support mechanism to said chair seat. 11. The wheeled work chair of claim 3, wherein said height adjustment mechanism comprises a height adjustment column extending longitudinally between said base and said chair seat, wherein said height adjustment column comprises an upper section and a lower section; wherein said lower section is supported by said base and comprises said lower portion; wherein said upper section comprises said upper portion and can move upwardly and downwardly relative to said lower section; wherein said seat support mechanism secures said chair seat to said upper section of said height adjustment column. 12. The wheeled work chair of claim 11, comprising a lockable height adjustment column comprising means to lock and unlock said height adjustment column; wherein said means comprises a movable actuation button; wherein said movable actuation button can be selectively moved from a locked position where said upper and lower sections of said height adjustment column cannot move relative to each other, to an unlocked position where said upper and lower sections of said height adjustable column can move relative to each other, wherein said height adjustment column can be actuated. 13. The wheeled work chair of claim 11, wherein said height adjustment column comprises at least one telescoping support mechanism which can contract and extend; wherein each telescoping support mechanism comprises a lower section supported by said base; and an upper section disposed in parallel alignment at least in part to each respective lower section; wherein each upper section of each telescoping support mechanism can move longitudinally in parallel alignment at least in part, toward and away from, each respective lower section; wherein said seat support mechanism secures said upper section of each telescoping support mechanism to said chair seat; wherein each upper section of each telescoping support mechanism comprises said upper portion of said wheeled work chair; and wherein each lower section of each telescoping support mechanism comprises said lower portion of said wheeled work chair. 14. "The wheeled work chair of claim 13, comprising at least one stand tube disposed above said base and supported by said base and comprising said lower portion; wherein at least one telescoping support mechanism is supported by said at least one stand tube; wherein said upper portion of at least one of said telescoping support mechanism extends between said at least one stand tube and said seat support mechanism." 15. The wheeled work chair of claim 13, wherein said height adjustment column comprises at least two telescoping support mechanisms which can contract and extend; wherein said seat support mechanism cannot rotate relative to said base. 16. The wheeled work chair of claim 1, wherein said push-off arm rest supporting mechanism is secured to said lower portion. 17. The wheeled work chair of claim 2, wherein said push-off arm rest supporting mechanism can be rotably secured to said lower portion. 18. The wheeled work chair of claim 2, including means for locking said push-off arm rest supporting mechanism; wherein said push-off arm rest supporting mechanism can be locked against rotation relative to said lower portion. 19. The wheeled work chair of claim 2, wherein said first and second push-off arm rest supports are each detachable from said wheeled work chair. 20. The wheeled work chair of claim 16, wherein said push-off arm rest supporting mechanism is detachable from said wheeled work chair. 21. The wheeled work chair of claim 1, comprising means to lock and unlock said upper and lower portions of said wheeled work chair; wherein when locked, relative change in elevation of said upper portion relative to said lower portion can be prevented, and when unlocked, relative change in elevation of said upper portion relative to said lower portion can be allowed; wherein said means comprises an actuation mechanism. 22. "The wheeled work chair of claim 2, wherein said first and said second push-off arm rest supports each comprise upper and lower telescoping sections; and a locking means; wherein said upper sections can be adjusted upwardly and downwardly relative to said respective first sections; and wherein said upper and lower sections of each push-off arm rest support can be locked against said relative movement. 23. The wheeled work chair of claim 2, wherein said seat support mechanism comprises means for slidably securing said seat support mechanism to said first and second push-off arm rest supports thereby allowing aligned upward and downward movement of said seat support mechanism relative to said push-off arm rest supports; wherein said seat support mechanism is prevented from rotating relative to said push-off arm rest supports. 24. The wheeled work chair of claim 2, wherein said chair seat can be slidably secured to said first and said second push-off arm rest supports thereby allowing aligned upward and downward movement of said chair seat relative to said push-off arm rest supports; wherein said chair seat is prevented from rotating relative to said push-off arm rest supports. 25. The wheeled work chair of claim 1, wherein said upper portion can rotate relative to said lower portion. 26. The wheeled work chair of claim 25, including anti-rotation means for preventing said upper portion from rotating relative to said lower portion. 27. The wheeled work chair of claim 1, comprising at least one arm rest support; wherein said arm rest support includes a lower end supported by said upper portion; and an upper end disposed above said chair seat; wherein said upper end comprises an arm rest disposed above said chair seat. 28. The wheeled work chair of claim 27, wherein at least one arm rest support comprises a remote actuation mechanism comprising means to lock and unlock said upper and lower portions of said wheeled work chair; wherein when locked, relative change in elevation of said upper portion relative to said lower portion can be prevented, and when unlocked, relative change in elevation of said upper portion relative to said lower portion can be allowed. 29. The wheeled work chair of claim 27, wherein said arm rest support comprises a remote actuation mechanism for actuating said height adjustment mechanism. 30. The wheeled work chair of claim 2, wherein said wheel supporting mechanism is secured to said lower portion. 31. The wheeled work chair of claim 1, wherein said first and said second wheel support members are secured to said upper portion. 32. The wheeled work chair of claim 31, wherein said second ends of each of said first and second wheel support members are slidably secured to respective first and second push-off arm rest supports thereby allowing aligned upward and downward movement of said first and second wheels relative to said first and second push-off arm rest supports. 33. The wheeled work chair of claim 1, wherein said wheel supporting mechanism is detachable from said wheeled work chair. 34. The wheeled work chair of claim 1, wherein said first and said second wheel support members and detachable from said wheeled work chair. 35. The wheeled work chair of claim 1, wherein said first and said second wheels are detachable from said wheeled work chair. 36. The wheeled work chair of claim 1, wherein each of said first and said second wheels comprise a hand rim of lesser diameter than said outer surface of said first and said second wheels. 37. The wheeled work chair of claim 1, wherein said base comprises at least three upwardly extending legs; wherein each leg comprise a lower end; wherein said lower end of each leg comprises a castor that can swivel and roll along a floor surface. 38. The wheeled work chair of claim 1, comprising a footrest secured to said wheeled work chair. 39. The wheeled work chair of claim 38, wherein said chair seat comprises a perimeter edge comprising at least a front edge and two side edges; wherein said footrest comprises chair attachment means for attachment to said wheeled work chair; wherein said chair attachment means is disposed within said perimeter edge of said chair seat; a footrest actuating mechanism supported by said chair attachment means for rotational movement in relation to said chair attachment means; and a footrest brace; and at least one footrest brace support arm disposed between said footrest brace and said footrest actuating mechanism; a first pivot on said chair attachment means; wherein said firs pivot is disposed in a substantially horizontal orientation; wherein said at least one footrest brace support arm is pivotally attached to said chair attachment means at the first pivot for movement in a substantially vertical plane; and wherein said at least one footrest brace support arm movably suspends said footrest brace in relation to said chair attachment means; and, wherein said footrest brace comprises a foot contact surface; and, wherein said footrest actuating mechanism engages said at least one footrest brace support arm, wherein movement of said footrest actuating mechanism can cause at least one footrest brace support arm to move; wherein said footrest brace may be centered in relation to said front edge of said chair seat; and wherein said footrest brace when centered in relation to said front edge of said chair seat is selectively movable through at least a range of movement from a position where the entirety of each footrest brace support arm as well as said footrest brace are disposed beneath said front edge of said chair seat, within the perimeter edge of said chair seat; to a position where the footrest brace is in front of the front edge of the chair seat; and wherein said foot contact surface of said footrest brace is disposed at the spaced apart distance from the chair seat for direct support of a wheeled chair user's feet in an elevated position in relation to said floor surface on which said chair base is supported; wherein rotational movement of said footrest actuating mechanism can cause said footrest brace to move in relation to said chair attachment means. 40. A wheeled work chair comprising: a base comprising one castor; wherein said castor swivels, and can contact and roll along a floor surface; a seat support mechanism positionally supported above said base; a chair seat supported above said seat support mechanism and positioned by said seat support mechanism; an height adjustment mechanism disposed between said base and said chair seat, wherein said height adjustment mechanism is supported by said base; wherein said chair seat and said seat support mechanism are supportedly positioned by said height adjustment mechanism; wherein said height adjustment mechanism can move; wherein movement of said height adjustment mechanism can result in changing the position of said chair seat relative to said base; wherein said seat support mechanism is supported by said height adjustment mechanism, and secures said chair seat to said height adjustment mechanism; wherein said wheeled work chair comprises an upper portion and a lower portion; wherein the position of said upper portion can be changed relative to said lower portion; wherein said lower portion comprises at least said base; wherein said upper portion comprises at least said seat support mechanism and said chair seat; a wheel supporting mechanism secured to said lower portion comprising first and second wheel support members, each wheel support member extending in opposite directions from each other; wherein each wheel support member comprises a first end; and a second end; wherein said first ends are secured to said wheeled work chair; a first wheel secured to said second end of said first wheel support member; and a second wheel secured to said second end of said second wheel support member; wherein each wheel can rotate in a substantially vertical plane; wherein said second ends of each wheel support member comprises a common axis upon which each wheel rotates substantially parallel to each other; wherein said first and second wheels cannot swivel in relationship to each other; and wherein each wheel comprises an outer diameter which can contact and roll along a floor surface; wherein said first and second wheels are positioned on said wheeled work chair convenient for a seated person to use his or her hands to move himself or herself about over a floor surface without use of his or her feet; a push-off arm rest supporting mechanism supported by said base; wherein said push-off arm rest supporting mechanism comprises first and second push-off arm rest supports extending upwardly from said push-off arm rest supporting mechanism, wherein each push-off arm rest support includes a first end, and a second end; wherein said first end of each push-off arm rest support is supported by said lower portion; first and second push-off arm rests disposed on respective second ends of said first and said second push-off arm rest supports; wherein a seated wheeled work chair user can grip said push-off arm rests with user's hands and push down thereon to reduce user's body weight from said chair seat and correspondingly reduce force to said height adjustment mechanism; wherein the position of said chair seat can be moved to change the body position of a person while said person's full body weight is supported on said wheeled work chair, at least upwardly relative to the floor. 41. The wheeled work chair of claim 40, wherein said height adjustment mechanism comprises a spring disposed between said base and said seat support mechanism. 42. The wheeled work chair of claim 41, wherein said spring comprises a non-locking gas spring comprising first and second telescoping sections; wherein said first section comprises a cylinder, and said second section comprises a piston rod disposed within said cylinder and extending outwardly therefrom; wherein said non-locking gas spring is disposed above said base and is supported by said base; wherein one of said first and second sections is secured to said seat support mechanism; wherein said movable spring material comprises pressurized gas disposed within said cylinder; and a fluid flow control valve disposed within said cylinder. 43. The wheeled work chair of claim 42, wherein said spring comprises a locking gas spring comprising a movable fluid flow control valve stem extending outwardly from said locking gas spring; and an actuation button comprising the outwardly extending end of said movable fluid flow control valve stem; wherein said actuation button can be moved from a first locked position to a second unlocked position; wherein said unlocked position allows relative longitudinal movement between said cylinder and said piston rod, wherein said locking gas spring is actuated. 44. The wheeled work chair of claim 43, wherein said wheeled work chair comprises an actuation mechanism for moving said actuation button from said first locked position to said second unlocked position resulting in actuating said locking gas spring. 45. The wheeled work chair of claim 43, wherein said wheeled work chair comprises a remote actuation mechanism for moving said actuation button; wherein said remote actuation mechanism comprises first and second ends; wherein said first end is disposed proximate said actuation button for movable engagement with said actuation button, and wherein said second end extends to a position proximate said push-off arm rest supporting mechanism; wherein said second end is supported by said push-off arm rest supporting mechanism and is so disposed that a person sitting on said chair seat can reach and move said remote actuation mechanism while keeping both hands on said push-off arm rest supporting mechanism. 46. The wheeled work chair of claim 40, wherein said height adjustment mechanism comprises at least one telescoping support mechanism which can contract and extend; wherein each telescoping support mechanism comprises a lower section supported by said base; and an upper section disposed in parallel alignment at least in part to each respective lower section; wherein each upper section of each telescoping support mechanism can move, toward and away from, each respective lower section; wherein said seat support mechanism secures said upper section of each telescoping support mechanism to said chair seat. 47. The wheeled work chair of claim 40, wherein said height adjustment mechanism comprises a height adjustment column extending longitudinally between said base and said chair seat, wherein said height adjustment column comprises an upper section and a lower section; wherein said lower section is supported by said base and comprises said lower portion; wherein said upper section comprises said upper portion and can move upwardly and downwardly relative to said lower section; wherein said seat support mechanism secures said chair seat to said upper section of said height adjustment column. 48. The wheeled work chair of claim 47, wherein said height adjustment column comprises at least one telescoping support mechanism which can contract and extend; wherein each telescoping support mechanism comprises a lower section supported by said base; and an upper section disposed in parallel alignment at least in part to each respective lower section; wherein each upper section of each telescoping support mechanism can move longitudinally in parallel alignment at least in part, toward and away from, each respective lower section; wherein said seat support mechanism secures said upper section of each telescoping support mechanism to said chair seat; wherein each upper section of each telescoping support mechanism comprises said upper portion of said wheeled work chair; and wherein each lower section of each telescoping support mechanism comprises said lower portion of said wheeled work chair. 49. The wheeled work chair of claim 47, comprising a lockable height adjustment column comprising means to lock and unlock said height adjustment column; wherein said means comprises a movable actuation button; wherein said movable actuation button can be selectively moved from a locked position where said upper and lower sections of said height adjustment column cannot move relative to each other, to an unlocked position where said upper and lower sections of said height adjustable column can move relative to each other, wherein said height adjustment column is actuated 50. The wheeled work chair of claim 40, wherein said push-off arm rest supporting mechanism is secured to said lower portion. 51. The wheeled work chair of claim 40, comprising means to lock and unlock said upper and lower portions of said wheeled work chair; wherein when locked, relative change in elevation of said upper portion relative to said lower portion can be prevented, and when unlocked, relative change in elevation of said upper portion relative to said lower portion can be allowed; wherein said means comprises an actuation mechanism. 52. The wheeled work chair of claim 40, comprising means to lock and unlock said upper and lower portions of said wheeled work chair; wherein when locked, relative change in elevation between said upper portion and said lower portion can be prevented, and when unlocked, relative change in elevation between said upper portion and said lower portion can be allowed; wherein said means comprises a remote actuation mechanism; wherein said remote actuation mechanism is supported on said push-off arm rest supporting mechanism and is so disposed that a person sitting on said chair seat can reach and move said remote actuation mechanism while keeping both hands on said push-off arm rest supporting mechanism. 53. The wheeled work chair of claim 40, wherein said base comprises at least two castors; wherein each castor swivels, and can contact and roll along a floor surface. 54. The wheeled work chair of claim 40, comprising a pivot comprising an horizontal axis; and a rotable back rest; wherein said rotable back rest can rotate about said pivot. 55. The wheeled work chair of claim 54, wherein said rotable back rest is adjustable in height relative to said chair seat. 56. The wheeled work chair of claim 40, wherein said support mechanism comprises a pivot comprising an horizontal axis; wherein said chair seat can rotate about said pivot. 57. The wheeled work chair of claim 41, wherein said spring comprises a movable resilient spring material; wherein when said upper portion of said wheeled work chair is moved toward said lower portion with sufficient force, said resilient spring material can be resiliently moved, wherein absent sufficient force, said resilient spring material can resiliently move resulting in moving said second portion away from said first portion, resulting in moving said seat support mechanism and correspondingly moving said chair seat away from said base.
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