Chair with a seat-inclination adjusting device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A47C-001/024
A47C-001/026
A47C-001/038
A47C-003/026
출원번호
US-0683256
(2003-10-09)
발명자
/ 주소
Chen, Su-Ming
대리인 / 주소
Ostrolenk, Faber, Gerb &
인용정보
피인용 횟수 :
12인용 특허 :
10
초록▼
A chair includes an upper frame disposed above and pivoted to a lower frame. An inclination adjusting device includes a latch mounted slidably on the upper frame and movable between a first position, in which the latch extends into and engages a selected one of engaging grooves in a latch engaging m
A chair includes an upper frame disposed above and pivoted to a lower frame. An inclination adjusting device includes a latch mounted slidably on the upper frame and movable between a first position, in which the latch extends into and engages a selected one of engaging grooves in a latch engaging member that is formed on the lower frame, and a second position, in which the latch disengages the selected engaging groove.
대표청구항▼
1. A chair comprising:a leg unit;a lower frame having opposite front and rear ends, a base plate secured to said leg unit, spaced-apart side plates extending between said front and rear ends in a longitudinal direction, and a latch engaging member that extends upwardly from said base plate and that
1. A chair comprising:a leg unit;a lower frame having opposite front and rear ends, a base plate secured to said leg unit, spaced-apart side plates extending between said front and rear ends in a longitudinal direction, and a latch engaging member that extends upwardly from said base plate and that is formed with a plurality of spaced apart engaging grooves aligned in a first transverse direction relative said longitudinal direction and said base plate;a first pivot extending in a second transverse direction relative to said first transverse direction and said longitudinal direction;an upper frame including a seat-mounting plate disposed above said lower frame, and two side plates that extend downwardly and respectively from two opposite sides of said seat-mounting plate and that are respectively pivoted to said side plates of said lower frame through said first pivot as to permit pivotal action of said upper frame relative to said lower frame;an urging mechanism connected to said seat-mounting plate of said upper frame and said front end of said lower frame so as to resiliently hold said seat-mounting plate in position; and an inclination adjusting device includinga latch mounted slidably on said seat-mounting plate of said upper frame, disposed rearwardly of said latch engaging member, and movable in said longitudinal direction between a first position, in which said latch extends into and engages a selected one of said engaging grooves in said latch engaging member, and a second position, in which said latch disengages said selected one of said engaging grooves in said latch engaging member, and an urging member for urging said latch so as to restore said latch from said first position to said second position;said inclination adjusting device includes a retaining box that is fixed to said seat-supporting plate, that is disposed rearwardly of said latch engaging member, and that is formed with a pair of guiding grooves extending in said longitudinal direction, a front receiving chamber that is disposed above and that is in spatial communication with said guiding grooves, and a rear receiving chamber that is disposed rearwardly of and that is in spatial communication with said front receiving chamber, and that extends in said second transverse direction, said latch including a latch plate engaging slidably said guiding grooves, and an abutment plate projecting upwardly from said latch plate in said first transverse direction into said front receiving chamber, said urging member being disposed within said front receiving chamber in such a manner as to urge constantly said abutment plate of said latch for restoring said latch to return from said first position to said second position.2. The chair as defined in claim 1, wherein said inclination adjusting device further includes a cam mechanism having a cam disposed movably within said rear receiving chamber and formed with a first inclined face defining a first cam face, and a cam follower that is disposed within said front receiving chamber, that is formed with a second inclined face defining a second cam face in sliding contact with said first cam face and that is disposed rearwardly of and that is associated with said abutment plate of said latch in such a manner as to simultaneously move therewith, said cam being moveable within said rear receiving chamber between a restricting position and a releasing position in such a manner that movement of said cam from said releasing position to said restricting position results in movement of said latch with said cam follower against urging action of said urging member from said second position to said first position and that movement of said cam from said restricting position to said releasing position results in movement of said latch with said cam follower from said first position to said second position by the virtue of urging action of said urging member.3. The chair as defined in claim 2, wherein said inclination adjusting device further includes an operating lever extending movably in said second transverse direction through said rear receiving chamber and said side plates of said upper frame, and being movable in said second transverse direction, said cam being mounted securely on said operating lever for co-movement therewith when said operating lever moves in said second transverse direction, said first and second cam faces being inclined relative to said operating lever.4. The chair as defined in claim 3, wherein said cam is further formed with a front abutment face that is parallel to said operating lever and that extends from said first cam face, said cam follower being further formed with a rear abutment face that is parallel to said operating lever and that extends from said second cam face, said cam being further movable in said second transverse direction from said restricting position to a stopping position, in which said front abutment face of said cam abuts against said rear abutment face of said cam follower, thereby preventing sliding movement of said cam from said stopping position to said releasing position.5. The chair as defined in claim 4, wherein said cam follower has a front end opposite to said rear abutment face, and is further formed with an engaging tongue projecting downwardly therefrom adjacent to said front end, said inclination adjusting device further including a bottom plate that is secured to said retaining box so as to conceal said guiding grooves, and that is formed with a through-hole to permit extension of said tongue of said cam follower therethrough so as to prevent removal of said cam follower, said latch and said urging member from said front receiving chamber.6. The chair as defined in claim 5, further comprising second and third pivots, and a backrest-supporting frame disposed rearwardly of said lower frame, said backrest-supporting frame including two side plates extending in said longitudinal direction and pivoted respectively to said side plates of said lower frame through said second pivot and to said side plates of said upper frame through said third pivot such that said second and third pivots are disposed rearwardly of and are parallel to said first pivot.7. The chair as defined in claim 6, further comprising a compression spring that is mounted within said front receiving chamber in said retaining box between said latch and said cam follower, and that has two opposite ends respectively urging said abutment plate of said latch and said cam follower.
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Caruso Jerome C. ; Caruso Steven J. ; Gezon Bruce R. ; Gierz Marc A. ; Nyenhuis Jack R., Chair.
Glenn A. Knoblock ; Arnold B. Dammermann ; Larry DeKraker ; Kevin A. Ekdahl ; Kurt R. Heidmann ; Gardner J. Klaasen, II ; James A. Perkins ; Gordon J. Peterson ; Edward H. Punches ; Charles , Seating unit including novel back construction.
Faiks Frederick S. (Greenville MI) Forslund ; III Carl V. (Grand Rapids MI) Scheper Robert M. (Grand Rapids MI) Anderson Craig M. (Kentwood MI), Split back chair.
Ludwig, James N.; Deevers, Nickolaus William Charles; Heidmann, Kurt R.; Johnson, William Thomas; Smith, Bruce M.; Spoelhof, Mark William, Seating arrangement.
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