Dental chair operating apparatus
AssigneeTakara Co., Ltd.
InventorsNoriyuki Yoshikawa, Kunio Fujiyama
Life of this patent
Estimating the term…
Abstract
A dental chair operating apparatus developed in relation to the underseat and the backrest. The uses for the present chair and integral underseat and backrest configuration include human dental, medical, beauty parlor, and barber shop treatment facilities and installations. The present chair, e.g. a dental chair, is one with a hip section of the underseat baseboard on top of a vertical motion apparatus on top of a base plate; a movable circular arc board with backrest baseboard tilts by an oil-pressured cylinder. The present chair configuration is basically automatic, however it may also be manually manipulated.
Claims4
A chair comprising:
- (a) a frame
- (b) a seat for receiving and supporting the body of a human, said seat being mounted and supported on said frame and comprising a hip underseat baseboard, upper thigh underseat baseboard and lower leg underseat baseboard
- (c) a backrest means comprising a backrest baseboard attached to a flat curved strip member, means mounted between said frame and said strip member for guiding movement of said strip member in an arcuate path so that the movement of said backrest baseboard corresponds to movements of the human body and wherein said strip member is also attached to means for moving said strip member in the arcuate path, movement of said strip member positioning said backrest in various positions, from vertical to horizontal
- (d) said upper thigh underseat baseboard movably mounted along one edge thereof to said hip underseat baseboard and movably mounted along an edge opposite said one edge to said lower leg underseat baseboard, and means for moving said upper thigh underseat baseboard in a substantially angular direction in a way corresponding to the natural movement of human thigh, while said backrest moves in a way corresponding to the movement of the hip, said movement of said upper thigh underseat concommitant with the movement of said, backrest by means connecting said backrest and underthigh underseat baseboard and;
- (e) said lower leg underseat baseboard having means interconnected to said upper thigh underseat baseboard for moving said lower leg underseat baseboard concommitant with the movement of said backrest and upper thigh underseat baseboard in a manner corresponding to the natural movements of human lower leg,
- (f) said means for guiding said strip member in an arcuate path including at least one pair of opposed cylindrical guide rollers, said rollers straddling said strip member and extending contiguously across the surface of said strip member substantially transverse to the linear longitudinal axis of said strip member along said longitudinal axis, so as to guide the motion of said strip member along said longitudinal axis.
Dependencies are inferred from the claim text.