Reclining chair frame with adjustable seat and back-rest, in par

Details Reclining chair frame with adjustable seat and back-rest, in par Reclining chair frame with adjustable seat and back-rest, in par

1986-10-28

1988-02-02

McCall, James T.

Chairs and seats

Legrest or footrest interconnected to move relative to...

297330, 297DIG10, A47C 102

Patent

active

047225661

ABSTRACT:
The reclining chair frame disclosed is for use principally in dentistry, and has an adjustable seat and back-rest, the seat connecting with the base at one side, or both, by way of two struts that converge slightly toward the top ends and form an articulated quadrilateral with the seat and base. One of the struts extends upwards and is hinged to a connecting link, this hinged in turn to the back-rest at a point lower than the point at which the back-rest itself is hinged to the seat. An actuator impinges on the remaining strut, rotating it about the pivot by which it is anchored to the base in such a way that the chair is maneuvered through an infinitely variable range of adjustments from a normal sitting position, with the back-rest upright, to a fully reclined position in which the back-rest is disposed substantially horizontal and the seat ultimately positioned above the level of the back-rest.

REFERENCES:
patent: 3596982 (1971-08-01), Grams
patent: 3804460 (1974-04-01), Leffler
patent: 4173372 (1979-11-01), Norris

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