An aircraft armrest may incorporate a rail roller linkage. The roller linkage may include an armrest plate, a rail attached to an aircraft seat assembly, a top roller link, and a bottom roller link. The top roller link may have a threaded upper adjustment cylinder, a pivot joint, and a pair of grooved rollers diagonally disposed on either side of the pivot. The bottom roller link may have an unthreaded lower adjustment cylinder, a pivot joint, and a pair of grooved rollers diagonally disposed on either side of the pivot. The grooved rollers may mesh with the rail. The roller linkage may include a roller adjustment screw, having a threaded portion, and extending through both of the adjustment cylinders. A compression spring may bias the roller link around the rail and may be disposed between the top roller link and the bottom roller link and surrounding the roller adjustment screw.

An aircraft armrest may incorporate a rail roller linkage. The roller linkage may include an armrest plate, a rail attached to an aircraft seat assembly, a top roller link, and a bottom roller link. The top roller link may have a threaded upper adjustment cylinder, a pivot joint, and a pair of grooved rollers diagonally disposed on either side of the pivot. The bottom roller link may have an unthreaded lower adjustment cylinder, a pivot joint, and a pair of grooved rollers diagonally disposed on either side of the pivot. The grooved rollers may mesh with the rail. The roller linkage may include a roller adjustment screw, having a threaded portion, and extending through both of the adjustment cylinders. A compression spring may bias the roller link around the rail and may be disposed between the top roller link and the bottom roller link and surrounding the roller adjustment screw.

A sitting apparatus having a frame configured to be situated at a sitting location. A seat assembly on the frame defines a support for a user in a sitting position. At least one armrest assembly has at least one surface to support an arm of a user in a sitting position on the seat assembly. The at least one armrest assembly is configured to be changed between first and second states. The at least one surface changes in angular relationship to a horizontal reference plane as an incident of the at least one armrest assembly changing between the first and second states.

The present invention discloses a rolling-and-swinging device and a massage chair. The rolling-and-swinging device comprises a gear motor, a motor mounting plate, a torque output board, a swing arm, a swing arm synchronizer ring, a damping ring, an optical shutter rotating ring, a swinging monitoring controller, a microcomputer controller, a shaft supporting plate, a frame and curved legs. The massage chair is for commercial sale, wherein the massage chair is equipped with aforementioned rolling-and-swinging device and two curved legs in contact with the ground, and the operation of the rolling and swinging motion of the massage chair is automatic. This invention is characterized by having a simple structure, and being able to operate reliably, low in energy consumption, quiet, and widely applicable.

The present invention discloses a rolling-and-swinging device and a massage chair. The rolling-and-swinging device comprises a gear motor, a motor mounting plate, a torque output board, a swing arm, a swing arm synchronizer ring, a damping ring, an optical shutter rotating ring, a swinging monitoring controller, a microcomputer controller, a shaft supporting plate, a frame and curved legs. The massage chair is for commercial sale, wherein the massage chair is equipped with aforementioned rolling-and-swinging device and two curved legs in contact with the ground, and the operation of the rolling and swinging motion of the massage chair is automatic. This invention is characterized by having a simple structure, and being able to operate reliably, low in energy consumption, quiet, and widely applicable.

A bathing chair assembly for sitting level on an uneven surface includes a chair that may be positioned in a shower thereby facilitating the chair to support a physically disabled user in the shower. A plurality of legs is provided and each of the legs is removably coupled to the chair. Thus, each of the legs may support the chair in the shower. Each of the legs is positioned at a selected height with respect to the chair. Thus, the chair may sit level on an uneven surface.

A bathing chair assembly for sitting level on an uneven surface includes a chair that may be positioned in a shower thereby facilitating the chair to support a physically disabled user in the shower. A plurality of legs is provided and each of the legs is removably coupled to the chair. Thus, each of the legs may support the chair in the shower. Each of the legs is positioned at a selected height with respect to the chair. Thus, the chair may sit level on an uneven surface.

A support mechanism for mounting a seat part to a foot part of a functional chair having a slide bearing which cooperates with a front section of the seat part, and a pivotable support part which is supported by a cantilever part and which is connected to a region of the seat part that is adjacent to the rear region of a seat surface section of the seat part.

A support mechanism for mounting a seat part to a foot part of a functional chair having a slide bearing which cooperates with a front section of the seat part, and a pivotable support part which is supported by a cantilever part and which is connected to a region of the seat part that is adjacent to the rear region of a seat surface section of the seat part.

A chair assembly includes a base assembly, a seat assembly having a pair of side edges and a fore-to-aft extending longitudinal centerline, a back assembly movable between upright and reclined positions, and an arm assembly including an arm base extending from a first location between the side edges to a second location laterally outward of one of the side edges, wherein the arm base extends at an acute angle with respect to the longitudinal centerline and at an upward angle from the first location toward the second location, a support assembly supported by and extending upwardly from the arm base, and an armrest supported by the support assembly that is adjustable to support the armrest between a plurality of selected vertical positions, wherein the arm assembly and back assembly move at a different rate from one another as the back assembly is moved between the upright and reclined positions.