Claims
- 1. A height adjustable leg for a desk or workstation comprising a first leg part adapted to stand on a floor surface, a second leg part adapted to be fixed to a top member of the desk, work-station or the like and means for adjusting the height of the second leg part relative to the first leg part, wherein a duct for cabling is attached to the first leg part, said duct comprising a hollow duct member extending vertically alongside the first leg part.
- 2. A height adjustable leg according to claim 1 wherein said duct member and said first leg part have adjacent side walls which define a generally H-shaped vertical channel adapted to receive a complementary H-shaped attachment member for attaching said duct member to said first leg part.
- 3. A height adjustable leg according to claim 1 wherein the duct for cabling includes at least one outlet socket.
- 4. A height adjustment system for a desk or workstation including a plurality of height adjustable legs in accordance with claim 1 and further including at least one cable tray extending substantially horizontally between a pair of height adjustable legs of the system, said cable tray being supported on upper ends of said duct members attached to said first leg parts of the pair of legs.
- 5. A height adjustment system according to claim 4, wherein said cable tray includes at least one partition for dividing said cable tray into compartments for different types of cables.
- 6. A height adjustment system according to claim 4, wherein said cable tray includes at least one outlet socket.
- 7. A height adjustment system according to claim 4 further comprising a cover member is attached to said top member at a location above the cable tray.
- 8. A height adjustment system according to claim 7, wherein said cover member is pivotally connected to an edge of said top member.
- 9. A height adjustment system according to claim 8, wherein said cover member is movable relative to said top member from a first position in which said cover member extends substantially horizontally outwardly from said top member to a second position allowing access to said cable tray.
- 10. A height adjustment system according to claim 9, wherein said cover member is pivotally connected to said top member by a pivotal mounting comprising a cover mounting member attached to said top member and a pivot piece having curved limbs received in complementary receiving portions of said cover member and said cover mounting member.
- 11. A height adjustment system for a desk or work-station comprising a top member supported by a plurality of height adjustable legs each having a first leg part, and a second leg part adapted to be fixed relative to the top member, said second leg part being movable relative to the first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears wherein said gearbox housing of at least one of said height adjustable legs includes a plurality of pinion gears, one of said plurality of pinion gears being connected to drive means for rotating said pinion gear and another of said plurality of pinion gears being connected by drive transmission means to the pinion gear of another height adjustable leg of the system, and at least one cable tray extending substantially horizontally between a pair of the height adjustable legs.
- 12. A height adjustment system according to claim 11 wherein the cable tray is supported on the upper ends of vertically extending duct members attached to the height adjustable legs.
- 13. A height adjustment system according to claim 11 wherein the cable tray includes at least one partition for dividing the tray into different compartments for different types of cables.
- 14. A height adjustment system according to claim 11 wherein the cable tray includes at least one outlet socket.
- 15. A height adjustment system according to claim 11 wherein a cover member is attached to the top member at a location above the cable tray.
- 16. A height adjustment system according to claim 15 wherein the cover member is pivotally connected to an edge of the top member.
- 17. A height adjustment system according to claim 16 wherein the cover member is movable relative to the top member from a first position in which it extends substantially horizontally outwardly from the top member to a second position allowing access to the cable tray.
- 18. A height adjustment system according to claim 17 wherein the cover member is pivotally connected to the top member by a pivotal mounting comprising a cover mounting member attached to the top member and a pivot piece having curved limbs received in complementary receiving portions of the cover member and over mounting member.
- 19. A height adjustment system for a desk or workstation comprising a top member supported by a plurality of height adjustable legs each having a first leg part, a second leg part adapted to be fixed relative to said top member and means for adjusting the height of said second leg part relative to said first leg part, wherein each of said height adjustable legs is disposed underneath a side or rear edge of said top member, a pair of spaced apart support beams extending between adjacent pairs of said legs, each beam of said pair of support beams being disposed at substantially the same horizontal level and extending substantially parallel to one another, said support beams clamped between upper and lower clamping members, said top member being supported in a cantilever arrangement from said support beams.
- 20. A height adjustment system according to claim 19 wherein said upper clamping members are secured to said top member.
- 21. A height adjustment system according to claim 20 wherein the upper clamping members comprise cantilever support arms extending substantially horizontally from the support beams.
- 22. A height adjustment system according to claim 19 wherein the lower clamping members comprise upper leg parts of the height adjustable legs.
- 23. A height adjustment system according to claim 19 wherein the lower clamping members are secured to upper leg parts of the height adjustable legs.
- 24. A height adjustment system according to claim 19 wherein the support beams are clamped between upper and lower clamping members provided at locations between the height adjustable legs.
- 25. A height adjustment system according to claim 19 wherein said upper and lower clamping members are secured together with at least one support beam clamped therebetween by securing means.
- 26. A height adjustment system according to claim 19 wherein the support beams are formed from roll-formed steel.
- 27. A height adjustment system according to claim 19 wherein said upper and lower clamping members have projections or recesses which engage with complementary recesses or projections in said support beams.
- 28. A height adjustment system according to claim 27 wherein the support beams are of hollow form having substantially vertical straight sides and upper and lower end portions with recesses or depressions therein for engagement by complementary formations on the upper and lower clamping members.
- 29. A height adjustment system for a desk or workstation comprising a top member and a plurality of height adjustable legs, each leg comprising a first leg part adapted to stand on a floor surface, and a second leg part adapted to be fixed relative to said top member, said second leg part being movable relative to said first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears wherein said gearbox housing of at least one of said height adjustable legs includes a plurality of pinion gears, one of said plurality of pinion gears being connected to drive means for rotating said pinion gear and another of said plurality of pinion gears being connected by drive transmission means to the pinion gear of another height adjustable leg of the system, said system including a hollow vertically extending duct member for cabling attached to the first leg part of at least one of said height adjustable legs.
- 30. A height adjustment system according to claim 29, wherein said at least one ball bearing race assembly includes a first bearing race member having a substantially part-spherical concave surface, a second bearing race member having a substantially part-spherical concave surface and a plurality of ball bearings received between said substantially part-spherical concave surfaces, said first and second bearing race members being formed from a low-friction plastic material.
- 31. A height adjustment system according to claim 29, wherein the second leg part includes a generally vertically extending rotatable shaft on which said crown gear is mounted, said rotatable shaft having a screw-threaded portion, and said first leg part includes a nut engaged with said screw-threaded portion, whereby rotation of said crown gear causes said second leg part to move substantially vertically relative to said first leg part.
- 32. A height adjustment system according to claim 31, wherein said crown gear is of hollow form having a bevel gear portion, a shaft portion extending from said bevel gear portion and a bore adapted to receive the upper end of said rotatable shaft for mounting said crown gear on said rotatable shaft.
- 33. A height adjustment system according to claim 32, wherein said gearbox housing includes a housing base member and a gearbox cover member, and a ball bearing race assembly between said shaft portion of said crown gear and said gearbox base or cover member.
- 34. A height adjustment system according to claim 31, wherein said second leg part includes a generally vertically extending tubular member surrounding said vertically extending rotatable shaft, and a pair of low friction half nuts are received on said screw-threaded portion of said shaft and attached to said tubular member.
- 35. A height adjustment system according to claim 29, wherein said at least one pinion gear is provided on a generally horizontally extending rotatable shaft adapted to be connected to drive means for rotating said rotatable shaft, and said pinion gear comprises a bevel gear portion and a spigot portion for mounting said pinion gear on said rotatable shaft.
- 36. A height adjustment system according to claim 29, wherein said duct member and said first leg part have adjacent side walls which define a generally H-shaped vertical channel adapted to receive a complementary H-shaped attachment member for attaching said duct member to said first leg part.
- 37. A height adjustment system according to claim 29, wherein a cable tray extends substantially horizontally between a pair of height adjustable legs, each of said legs having a hollow vertically extending duct member, said cable tray being supported on upper ends of said vertically extending duct members.
- 38. A height adjustable leg for a desk or workstation comprising:
- a first leg part adapted to stand on a floor surface;
- a second leg part adapted to be fixed relative to a top member of said apparatus, said second leg part being movable relative to said first leg part in a substantially vertical direction;
- and at least one adjustable linear bearing provided between said relatively movable first and second leg parts, said linear bearing comprising a bearing body fixed to one of said leg parts, said bearing body having upper and lower expandable bearing regions providing bearing surfaces for the other of said leg parts, and upper and lower wedge members received in respective recesses in said upper and lower regions for expanding said regions to compensate for wear of said bearing surfaces, said leg including a hollow vertically extending duct member for cabling attached to the first leg part of said plurality of leg parts.
- 39. A height adjustable leg according to claim 38, wherein the adjustable linear bearing further comprises spring means for urging at least one of said wedge members into the recess in its respective bearing region of said bearing body so that the bearing automatically compensates for wear of the bearing surface of said bearing region.
- 40. A height adjustable leg according to claim 39, wherein the linear bearing further comprises an elongate connecting member attached to said lower wedge member and extending upwardly between said expandable bearing regions and through a bore in said upper wedge member, and spring means received on a portion of said elongate connecting member above said upper wedge member for urging said upper and lower wedge members into their respective recesses in said upper and lower bearing regions, whereby said linear bearing is automatically self-adjusting to compensate for wear of said bearing surfaces.
- 41. A height adjustable leg according to claim 38, wherein said bearing body and said wedge members are formed from a low friction plastics material and said wedge members have an angle of taper less than the friction angle of said low friction plastics material.
- 42. A height adjustable leg for a desk or workstation comprising a first leg part adapted to stand on a floor surface, and a second leg part adapted to be fixed to a top member of said desk or workstation, said second leg part being movable relative to said first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears, wherein the second leg part includes a generally vertically extending rotatable shaft on which said crown gear is mounted, said rotatable shaft having a screw-threaded portion, and said first leg part includes a nut engaged with said screw-threaded portion, whereby rotation of said crown gear causes said second leg part to move substantially vertically relative to said first leg part, and wherein said crown gear is of hollow form having a bevel gear portion, an upper shaft portion extending upwardly from said bevel gear portion and a bore adapted to receive the upper end of said rotatable shaft for mounting said crown gear on said rotatable shaft, said height adjustable leg having a hollow vertically extending duct member for cabling attached to the first leg part.
- 43. A height adjustable leg according to claim 42, wherein said duct member and said first leg part have adjacent side walls which define a generally H-shaped vertical channel adapted to receive a complementary H-shaped attachment member for attaching said duct member to said first leg part.
- 44. A height adjustable leg for a desk or workstation comprising a first leg part adapted to stand on a floor surface, and a second leg part adapted to be fixed to a top member of said desk or workstation, said second leg part being movable relative to said first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears, wherein the second leg part includes a generally vertically extending rotatable shaft on which said crown gear is mounted, said rotatable shaft having a screw-threaded portion, and said first leg part includes a nut engaged with said screw-threaded portion, whereby rotation of said crown gear causes said second leg part to move substantially vertically relative to said first leg part wherein said second leg part includes a generally vertically extending tubular member surrounding said rotatable shaft, and a pair of low friction half nuts are received on said screw-threaded portion of said shaft and attached to said tubular member, said height adjustable leg having a hollow vertically extending duct member for cabling attached to the first leg part.
- 45. A height adjustable leg according to claim 44, wherein said duct member and said first leg part have adjacent side walls which define a generally H-shaped vertical channel adapted to receive a complementary H-shaped attachment member for attaching said duct member to said first leg part.
- 46. A height adjustable leg for a desk or workstation comprising a first leg part adapted to stand on a floor, and a second leg part adapted to be fixed to a top member of said desk or workstation, said second leg part being movable relative to said first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears, wherein said first leg part includes a vertically extending column, said second leg part includes a vertically extending member within said column and at least one adjustable linear bearing between said column and said vertically extending member, said height adjustable leg including a hollow vertically extending duct member for cabling attached to said first leg part.
- 47. A height adjustable leg according to claim 46, wherein said duct member and said first leg part have adjacent side walls which define a generally H-shaped vertical channel adapted to receive a complementary H-shaped attachment member for attaching said duct member to said first leg part.
- 48. A height adjustment system for a desk or work-station comprising a top member and a plurality of height adjustable legs, each leg comprising a first leg part adapted to stand on a floor surface, and a second leg part adapted to be fixed to said top member, said second leg part being movable relative to said first leg part in a substantially vertical direction, said second leg part including a gearbox housing containing a crown gear rotatable about a substantially vertical axis and at least one pinion gear engageable with said crown gear and rotatable about a substantially horizontal axis, said gearbox housing containing at least one ball bearing race assembly provided between said gearbox housing and at least one of said gears wherein said gearbox housing of at least one of said height adjustable legs includes a plurality of pinion gears, one of said plurality of pinion gears being connected to drive means for rotating said pinion gear and another of said plurality of pinion gears being connected by drive transmission means to the pinion gear of another height adjustable leg of the system, each height adjustable leg being disposed underneath a side or rear edge of the top member and the top member is supported by at least one generally horizontally extending cantilever member.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9601442 |
Mar 1996 |
SGX |
|
PO1297 |
Jul 1996 |
AUX |
|
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/400,605, filed Mar. 8, 1995 now U.S. Pat. No. 5,685,510.
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Foreign Referenced Citations (7)
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246818 |
Oct 1962 |
AUX |
580366 |
Jun 1986 |
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632297 |
Feb 1990 |
AUX |
0 379 262 |
Jul 1990 |
EPX |
2 620 316 |
Mar 1989 |
FRX |
33 41 535 |
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8100965 |
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WOX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
400605 |
Mar 1995 |
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