Dental patients' chair with a parallelogram supporting arm

Details Dental patients' chair with a parallelogram supporting arm Dental patients' chair with a parallelogram supporting arm

1975-05-30

1977-04-26

Parsons, Jr., Marion

Chairs and seats

Movable bottom

Interconnected with back for relative concurrent movement

248421, A47C 320

Patent

active

040197786

ABSTRACT:
A dental patients' chair with two parallelogram supporting arms, each having one end linked to a base and another end carrying the seat of the chair. The invention is particularly characterized in that the base is a welded construction consisting substantially of a horizontal basic part and two spaced welded vertical side walls receiving link axles of an end of the parallelogram arms.

REFERENCES:
patent: 1658456 (1928-02-01), Meyer
patent: 2287182 (1942-07-01), Leake
patent: 2690786 (1954-10-01), Sedlock
patent: 2784768 (1957-03-01), Holopainen
patent: 3083055 (1963-03-01), Davis
patent: 3302971 (1967-02-01), Lory
patent: 3482871 (1969-12-01), Lehner
patent: 3493201 (1970-02-01), Marran
patent: 3694990 (1972-10-01), Pamer

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