Abstract: A barber shop or beauty parlor chair for back shampooing, i.e. the shampooing of the hair and scalp of the head of a person seated in the chair, from the rear of the person, by tilting the chair into a reclined and substantially horizontal position, so that the person or customer's neck may be readily fitted onto the shampoo bowl. The present chair features pivoted frame members manipulatable by an integral hydraulic cylinder, so that the chair is adjustable from an upright position into a reclined and substantially horizontal position, whereby back-shampooing of the head of a person sitting in the chair may readily be accomplished. The chair features pivoted frame members which are pivoted by activation of the upper plunger of a hydraulic cylinder.

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.

Abstract: A chair for human dental or medical treatment and having an improved adjustable headrest support. The chair features a flat curved linear strip member which extends between the headrest and the main frame of the chair. The strip member is guided by at least one, and preferably two pairs of opposed cylindrical guide rollers which contiguously straddle the strip member, so as to guide the motion of the strip member along its longitudinal axis, as it is displaced along its axis and towards or away from the frame, typically by a hydraulic mechanism. This makes possible vertical direction of movement of the strip member. The hydraulic mechanism, or two mechanisms in tandem, are a pivoted floating mounting for the strip member which facilitates ready adjustment of the headrest support relative to the main frame and seat of the chair. At least one tension spring is provided to produce smooth backdown of the piston plunger and piston head when hydraulic fluid pressure in the cylinder is reduced.