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US 7,424,833 B2Granted
Telescopically moving structure
AssigneeIDE Associates (IOM) Limited
InventorsPreben Bo Fich, Christian Noergaard
Life of this patent
Estimating the term…
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AssigneeIDE Associates (IOM) Limited
InventorsPreben Bo Fich, Christian Noergaard
Estimating the term…
A telescopically moving structure (1) comprising a nut (2) mounted in a rotationally fixed manner in relation to a frame part, a spindle tube (3) with an external thread in engagement with the nut (2), which spindle tube (3) furthermore has an internal thread (4) with the opposite direction to that of the external thread, which internal thread (4) is in engagement with a non-rotational spindle (5) provided with an external thread, the spindle tube (3) being connected in a rotationally fixed manner, but in the axial direction in a slidable manner to a driving shaft (6), wherein the driving shaft (6) has an essentially polygonal cross section with a perimeter forming two opposite longitudinal tracks for engagement with torque-transferring rolling bodies which are journalled in a bushing fastened in the spindle tube (3) to thereby enable transfer of a large torque without the risk of seizure between the driving shaft (6) and the spindle tube (3).
A telescopically moving structure comprising a nut connected in a rotationally fixed manner with respect to a frame part, a spindle tube having an external thread in engagement with said nut and an internal thread with a direction of inclination opposite to that of said external thread, a non-rotational spindle having an external thread in engagement with the internal thread of said spindle tube, a drive shaft connected with said spindle tube in a manner such that the spindle tube is rotationally fixed, but slidable in an axial direction with respect to said drive shaft,
A height-adjustable table having a tabletop and a number of legs each comprising three telescopically movable parts, said legs including a telescopically moving structure comprising a nut connected in a rotationally fixed manner with respect to a frame part, a spindle tube having an external thread in engagement with said nut and an internal thread with a direction of inclination opposite to that of said external thread, a non-rotational spindle having an external thread in engagement with the internal thread of said spindle tube, a drive shaft connected with said spindle tube in a manner such that the spindle tube is rotationally fixed, but slidable in an axial direction with respect to said drive shaft, said drive shaft having a perimeter forming two opposite longitudinal tracks and said spindle tube having a bushing fastened thereto, torque-transferring rolling bodies being journalled in said bushing to engage said opposite longitudinal tracks in said drive shaft, and drive means for said drive shaft providing a driving force supplied in an area immediately below said tabletop.
Dependencies are inferred from the claim text.