Abstract: A pair of link plates, each pivotally connected at one end to a seat base and each pivotally connected at their other ends to a seat plate and seat supported thereby, constrain the seat plate and seat to a rearward and upward movement, or a downward and forward movement, with respect to the seat base. The plunger, of a hydraulic cylinder pivotally carried by the seat base, is pivotally connected to the seat plate so that when actuated it induces movement of the seat plate to its rearward and upward position. A seat back is pivotally connected to the seat base and to armrests carried by the seat plate so that movement of the seat in the upward and rearward direction moves the seat back to a downward position aligned with the seat. A footrest linkage is connected between the seat back and a footrest connected to the seat so that movement of the seat back into its downward position moves the footrest into an upward position aligned with the seat and seat back.

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.

Abstract: An external decorative corner member of the type suitable for use in attaching furniture panels and the like. The length of this corner member can be adjusted to the panel dimensions. The corner member also serves to support the furniture panels during assembly and grooves provided in each portion of the inner flange speeds assembly by providing a location for attaching fasteners. The grooves further serve to strengthen each portion of the inner flange.

Abstract: A dental operatory system is disclosed which converts generalized space to a multi-operatory dental clinic at minimum expense. Each dental operatory unit is generally L-shaped and forms a wall-like partition structure between a first operatory and a second operatory. The L-shaped structure incorporates lead-lined protective panels. An x-ray unit and light unit are mounted so as to be accessible to each operatory. Drawers are also cooperatively mounted to ease of access by the dentist or assistant in each operatory.

Abstract: A dental operatory system is disclosed which converts generalized space to a multi-operatory dental clinic at minimum expense. Each dental operatory unit is generally L-shaped and forms a wall-like partition structure between a first operatory and a second operatory. The L-shaped structure incorporates lead-lined protective panels. An x-ray unit and light unit are mounted so as to be accessible to each operatory. Drawers are also cooperatively mounted to ease of access by the dentist or assistant in each operatory.