Ring shaped spring device

Details Ring shaped spring device Ring shaped spring device

2006-04-04

2006-04-04

Pezzlo, Benjamin A. (Department: 3683)

Spring devices

Spring panel

With means to vary preliminary tension of spring

C267S179000

Reexamination Certificate

active

07021610

ABSTRACT:
A spring device comprising at least one annular support plate defining a ring with a central axis; a plurality of circumferentially spaced, parallel oriented coil springs disposed about the at least one annular plate; and, a plurality of lock assemblies spaced about the plate. Each of the lock assemblies being in position within a spring cavity of one of the coil springs to allow additional springs to be provided on the spring device. In addition, the lock assemblies are dimensioned so that the coil spring is retained in a prestressed condition.

REFERENCES:
patent: 1146933 (1915-07-01), Gallagher, Jr.
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patent: 1295316 (1919-02-01), Hines
patent: 1390948 (1921-09-01), Woodward
patent: 1444452 (1923-02-01), Bigelow
patent: 1603977 (1926-10-01), Olmstead
patent: 1943492 (1934-01-01), Symington
patent: 3257852 (1966-06-01), Perkins
patent: 4385754 (1983-05-01), Waite
patent: 4426076 (1984-01-01), Palmer
patent: 4756071 (1988-07-01), Takeuchi
patent: 5306086 (1994-04-01), Orlowski et al.
patent: 5772191 (1998-06-01), Nakano et al.

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