Height adjustment system for a desk or workstation

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.

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.

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.

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.

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.

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.