Chairs and seats – Movable bottom – Tiltable
Patent
1986-02-07
1987-08-25
McCall, James T.
Chairs and seats
Movable bottom
Tiltable
297337, 297DIG10, A47C 102
Patent
active
046888519
ABSTRACT:
A seating assist device including a base member, a seat member for receiving a person to a seated position, a main spring for simultaneously acting as a hinge between the base member and the seat means, and exerting a resilient force biasing the seat member away from the base member, and an arrangement for adjusting the resilient force of the main spring including at least one helper spring sized for close fitting relation with the main spring. An adjustable spring assembly having a main spring with a generally C-shaped portion, at least one helper spring sized for close fitting relation with the main spring for varying the resilient force of the assembly, and means for securing the helper spring to the main spring including a pair of guides on opposite ends of the C-shaped portion and a pair of corresponding grooves on the helper spring for frictionally contacting the guides when the helper spring is manually inserted within the C-shaped portion, is also disclosed.
REFERENCES:
patent: 1025915 (1912-05-01), Hoff
patent: 1288216 (1918-12-01), Sayles
patent: 1566173 (1925-12-01), Storck
patent: 1698344 (1929-01-01), Mott
patent: 1986259 (1935-01-01), Fischer
patent: 2039342 (1937-08-01), Pielstick
patent: 2089761 (1944-11-01), Pielstick
patent: 2362746 (1949-08-01), De Vries
patent: 2478112 (1951-01-01), Larsen
patent: 2539034 (1962-06-01), Ruby
patent: 3039221 (1964-11-01), Musgrave
patent: 3092870 (1963-06-01), Baer
patent: 3158398 (1970-10-01), Stryker
patent: 3536313 (1970-10-01), Rice
patent: 3616487 (1971-11-01), Dearth
patent: 3640566 (1972-02-01), Hodge
patent: 3679260 (1972-07-01), Morse-Brown
patent: 3737155 (1973-06-01), Karlan
patent: 3851917 (1974-12-01), Horstman et al.
patent: 4031576 (1977-06-01), Epstein
patent: 4127214 (1978-11-01), Pedraid
patent: 4139214 (1979-02-01), Meyer
Allen Henry E.
McCall James T.
Schwartz Mortimer
White, Jr. Carl
Ziolkowski Andrew
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