Chairs and seats – Movable bottom – Tiltable
Patent
1988-09-07
1989-07-25
McCall, James T.
Chairs and seats
Movable bottom
Tiltable
297347, 297DIG10, A47C 102
Patent
active
048506451
ABSTRACT:
An apparatus for elevating and lowering a freestanding seating structure, such as a house chair, recliner, or sofa. The apparatus is comprised of a base, an elevator assembly, a power assembly connected between the base and the elevator assembly, and a control assembly. The elevator assembly releasably receives, supports, elevates and lowers the seating structure. The power assembly provides power and supportingly moves the elevator assembly. The control assembly controls the power assembly and the position of the elevator assembly relative to the base. The invention also includes riser arms which are pivotally connected between the base and the elevator assembly for structurally supporting the stabilizing the elevator assembly.
REFERENCES:
patent: 2821242 (1958-01-01), Manegold
patent: 3123400 (1964-03-01), Paulson
patent: 3138402 (1964-06-01), Heyl, Jr. et al.
patent: 3472488 (1969-10-01), Naughton
patent: 3596982 (1971-08-01), Grams
patent: 3865347 (1975-02-01), Pase
patent: 3894303 (1975-07-01), Angel
patent: 4083599 (1978-04-01), Gaffney
patent: 4448382 (1984-05-01), Melone
patent: 4752100 (1988-06-01), Lemaire
Sales brochure No. PPA-383 Entitled "Performance PAK Actuator" by Thomson Saginaw Ball Screw Company, Inc., Dated 3/87, pp. 4 and 5.
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