Two position at-rest seat adjustment mechanism
AssigneeL&P Property Management Company
InventorMassimo Costaglia
Life of this patent
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Abstract
This invention is directed to a two-position, at rest, seat angle adjustment assembly that locks the seat in two distinct positions. In a first position, the seat is generally horizontal, while in a second position, the seat is inclined at an angle relative to horizontal. The assembly includes left and right adjustment mechanisms, a rod, and a lever. The left and right adjustment mechanisms are mounted to the seat and the back assembly on each side thereof. Each of the mechanisms includes a housing, and a cam. The cam is received in the housing and the rod is fixably received within the cam. The lever is attached to the rod proximate the right adjustment mechanism. The lever is utilized to rotate the cams within their respective housings thereby moving the seat with respect to the back assembly.
Claims13
A seat angle adjustment assembly for use with a chair tilt mechanism, the tilt mechanism including a housing, a back attachment assembly coupled to the housing, and a seat plate adapted to be coupled to a chair seat and pivotably coupled at a front end to the housing, the seat angle adjustment assembly comprising:
- a rod rotatably coupled to the back attachment assembly;
- a first cam housing coupled to the seat plate on a first side of the back attachment assembly and a second cam hosing coupled to the seat plate on a second side of the back attachment assembly, the first cam housing defining a first cam cavity and the second cam housing defining a second cam cavity;
- a first cam located within the first cam cavity and a second cam located within the second cam cavity, the first cam and the second cam each defining at least two positions,
- wherein the rod is coupled to the first cam and the second cam and rotates together with the first cam and the second cam;
- and
- wherein a portion of the first cam is received in a slot in a first sidewall of the back attachment assembly and a portion of the second cam is received in a slot in a second sidewall of the back attachment assembly;
- and
- a lever coupled to the rod such that rotation of the lever rotates the rod and the first cam and the second cam, wherein rotation of the lever rotates the first cam within the first cavity to move the first cam between the at least two positions and rotates the second cam within the second cavity to move the second cam between the at least two positions, thus moving the cam housings and rear of the seat plate between two positions.
A seat angle adjustment assembly for use with a chair having a base, a tilt control mechanism supported by the base which allows a seat to be tilted relative to the base, the tilt control mechanism having a main body and a seat plate pivotably coupled to a front portion of the main body, the seat being supported by the seat plate, and a back coupled to the tilt control mechanism by a back assembly, the assembly comprising;
- a pair of adjustment mechanisms, each of the pair of adjustment mechanisms being coupled with the back assembly and located outwardly therefrom, each of the adjustment mechanisms including:
- a housing coupled with a rear portion of the seat plate, the housing including a cam cavity with an inner cam surface, an elongate slot, and first and second stops,
- a cam received within the housing, the cam including a keyed aperture, wherein the cam includes a first end keyed to the rod and a second end having an extending finger, the finger operable with said first and second stops to hold the seat plate in first and second positions relative to the chair base, and
- a rod fixedly received within the keyed aperture and interconnecting the pair of adjustment mechanisms such that rotation of said rod rotates said cams within said housings, wherein rotation of said cams causes the housings to move, and in turn causes the rear of the seat plate to pivot about the front of the seat plate.
A two position seat angle adjustment mechanism for use on a chair having a seat plate with a forward end pivotably coupled to a tilt control mechanism, comprising:
- a rod;
- a lever coupled to the rod such that rotation of the lever rotates the rod;
- a cam housing coupled to the rod, the cam housing having a stop tab protruding from a cam-housing surface, wherein rotation of the lever and the rod does not rotate the cam housing;
- and
- a cam coupled to the rod and positioned inside the cam housing, the cam including a protruding finger, wherein rotation of the lever and the rod rotates the cam through a plurality of positions and wherein the protruding finger engages the stop tab to hold the cam in one position of the plurality of positions.
Dependencies are inferred from the claim text.