Chair with a rack-and-pinion assembly for adjusting height of a seat member
AssigneeMission Hills Investment Corporation
InventorJui-Lu Wang
Life of this patent
Estimating the term…
Abstract
A chair includes a seat member having left and right sides formed with left and right leg-holding seats, respectively. Each of the leg-holding seats defines a leg extension bore therethrough. Each of left and right leg units has an elongated front leg extending through the leg extension bore in a respective one of the leg-holding seats. Two racks are respectively fixed to and extend along the length of the front legs. A driven shaft is journalled to a bottom face of the seat member. Two pinions are respectively fixed to opposite ends of the driven shaft, and mesh respectively with the racks. A drive unit drives rotation of the driven shaft, which in turn, results in sliding movement of the seat member along the front legs.
Claims7
A chair comprising:
- a seat member having a bottom face, and left and right sides formed with left and right leg-holding seats, respectively, each of said leg-holding seats defining a leg extension bore therethrough, each of said left and right leg units having an elongated front leg extending through said leg extension bore in a respective one of said leg-holding seats so as to permit sliding movement of said seat member along said elongated front legs of said left and right leg units;
- said left and right leg units connected to said seat member;
- a rack-and-pinion assembly including a pair of racks respectively fixed to and extending along the length of said left and right leg units, a driven shaft mounted rotatably on said seat member and having two opposite ends disposed respectively adjacent to said racks, and a pair of pinions respectively fixed to said opposite ends of said driven shaft and meshing respectively with said racks;
- and
- a drive unit for driving said driven shaft, which in turn results in sliding movement of said seat member along said left and right leg units.
Dependencies are inferred from the claim text.