Geomatic pole support with telescoping legs and locks
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A47B-091/00
F16M-011/20
출원번호
US-0421662
(2006-06-01)
등록번호
US-7374140
(2008-05-20)
발명자
/ 주소
Crain,Steven B.
Moore,Christopher T.
Oathout,Jeffrey L.
Everly,Ron D.
Essex,Larry W.
Williamson,Jerry L.
Mize,Ralph C.
출원인 / 주소
Crain Enterprises, Inc.
대리인 / 주소
Senniger Powers LLP
인용정보
피인용 횟수 :
13인용 특허 :
80
초록▼
A leg for use in supporting geometric equipment includes a first leg section and a second leg section for telescoping receiving the first leg section. A locking device includes an actuator and an engagement portion. The locking device is operable in a lock position in which the engagement portion be
A leg for use in supporting geometric equipment includes a first leg section and a second leg section for telescoping receiving the first leg section. A locking device includes an actuator and an engagement portion. The locking device is operable in a lock position in which the engagement portion bears against the second leg section on the interior thereof with a force selected to lock the first and second leg sections with respect to each other, and an unlock position in which the engagement portion is spaced from the second leg section such that the leg sections are free to move in telescoping relation with respect to each other.
대표청구항▼
What is claimed is: 1. A leg for use in supporting geometric equipment comprising a first leg section and a second leg section having an interior surface facing toward a longitudinal axis of the leg, the first leg section being telescopingly received into an interior of the second leg section for s
What is claimed is: 1. A leg for use in supporting geometric equipment comprising a first leg section and a second leg section having an interior surface facing toward a longitudinal axis of the leg, the first leg section being telescopingly received into an interior of the second leg section for selective extension from and retraction into the second leg section to lengthen and shorten the leg, and a locking device including an actuator and an engagement portion positioned to act on the interior surface of the second leg section to lock the first and second leg sections relative to each other to fix the length of the leg, the locking device being operable in a lock position in which the engagement portion of the locking device bears against the second leg section on the interior surface thereof with a force selected to lock the first and second leg sections, and an unlock position in which the leg sections are free to move in telescoping relation to change the length of the leg, the engagement portion being engageable with the interior surface of the second leg section in the lock position at different location substantially continuously along a length of the second leg section for substantially continous adjustment of the length, the locking device being mounted in the first leg section and projecting longitudinally outwardly therefrom into the second leg section, the locking device including at least one ear projecting outwardly therefrom through a hole in the first leg section to connect the locking device to the first leg section. 2. A leg for use in supporting geometric equipment as set forth in claim 1 wherein the ear engages the second leg section for guiding sliding movement between the first and second leg sections. 3. A leg for use in supporting geometric equipment as set forth in claim 2 wherein the locking device comprises two ears projecting outwardly therefrom through respective holes in the first leg section to connect the locking device to the first leg section. 4. A leg for use in supporting geometric equipment as set forth in claim 1 further comprising a retainer mounted on an open end of the second leg section, the first leg section being received through the retainer into the second leg section, the ear being engageable with the retainer to prevent withdrawal of the first leg section from the second leg section. 5. A leg for use in supporting geometric equipment comprising a first leg section and a second leg section, the first leg section being telescopingly received into an interior of the second leg section for selective extension from and retraction into the second leg section to lengthen and shorten the leg, and a locking device including an actuator and an engagement portion positioned to act on the interior of the second leg section to lock the first and second leg sections relative to each other to fix the length of the leg, the locking device being operable in a lock position in which the engagement portion of the locking device bears against the second leg section on the interior thereof with a force selected to lock the first and second leg sections, and an unlock position in which the leg sections are free to move in telescoping relation to change the length of the leg, the locking device being mounted in the first leg section and projecting longitudinally outwardly therefrom into the second leg section, the locking device including at least one ear projecting outwardly therefrom through a hole in the first leg section to connect the locking device to the first leg section, the second leg including a retainer mounted on an open end of the second leg section, the first leg section being received through the retainer into the second leg section, the ear being engageable with the retainer to prevent withdrawal of the first leg section from the second leg section, at least one of the ear and the retainer being resiliently deformable to permit the first leg section to move out of the second leg section. 6. A leg for use in supporting geometric equipment comprising a first leg section and a second leg section, the first leg section being telescoping received into an interior of the second leg section for selective extension from and retraction into the second leg section to lengthen and shorten the leg, and a locking device including an actuator and an engagement portion positioned to act on the interior of the second leg section to lock the first and second leg sections relative to each other to fix the length of the leg, the locking device being operable in a lock position in which the engagement portion of the locking device bears against the second leg section on the interior thereof with a force selected to lock the first and second leg sections, and an unlock position in which the leg sections are free to move in telescoping relation to change the length of the leg, the locking device being mounted in the first leg section and projecting longitudinally outwardly therefrom into the second leg section, the locking device including at least one ear projecting outwardly therefrom through a hole in the first leg section to connect the locking device to the first leg section, a lock member having an upper guide portion engageable with the actuator for guiding the actuator, a hinge and a lower portion having the engagement portion thereon, the lower portion being connected by the hinge to the upper guide portion, and wherein the lock member is formed as one piece. 7. A leg for use in supporting geometric equipment as set forth in claim 6 wherein the lock member is formed of polymeric material. 8. A leg for use in supporting geometric equipment as set forth in claim 6 wherein the lower portion is pivotable relative to the upper guide portion on the hinge. 9. A leg for use in supporting geometric equipment as set forth in claim 6 wherein the lower portion has an inclined surface thereon engageable with the actuator to force the lower portion outwardly such that the engagement portion engages the second leg section for locking the leg sections into position relative to one another. 10. A leg for use in supporting geometric equipment as set forth in claim 9 wherein the locking device further comprises a second lock member having the same construction as the first, the actuator being engageable with the inclined surfaces of the first and second lock members to drive the lock members away from each other to the lock position. 11. A leg for use in supporting geometric equipment as set forth in claim 10 wherein the actuator comprises a wedge and an actuator rod connected to the wedge, the wedge being engaged with the inclined surfaces of the first and second lock members. 12. A leg for use in supporting geometric equipment as set forth in claim 10 wherein the lock members are shaped to interfit with each other. 13. A leg for use in supporting geometric equipment as set forth in claim 9 wherein the lower portion further includes a ramp surface formed as one piece with the lock member, the ramp surface being engageable with the actuator to pull the lock member away from the second leg section in the unlock position. 14. A leg for use in supporting geometric equipment as set forth in claim 13 wherein the actuator comprises a wedge, and actuator rod and a cam, the wedge being engageable with the inclined surface of the lower portion and the cam being engageable with the ramp surface of the lower portion. 15. A leg for use in supporting geometric equipment as set forth in claim 6 wherein the engagement portion comprises a resilient member molded onto the lower portion of the lock member.
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