Marvin E Reinecke

US Patent:

47951303, Jan 3, 1989

Filed:

Sep 24, 1982

Appl. No.:

6/422781

Inventors:

Glen E. Price - Caney KS
Marvin E. Reinecke - Dewey OK
James N. Hilderbrand - Tulsa OK

Assignee:

Applied Automation, Inc. - Bartlesville OK

International Classification:

F16K 31122
F16K 700

US Classification:

251 62

Abstract:

A piston biasing means including, a coil-type spring, adapted to exert pressure on one side of a piston to be biased in a predetermined direction, a spring retaining means which is slidable toward and away from the piston when the spring is compressed and released and centering means, preferably including pivot balls on each end of the spring, so as to make point contact and rolling contact with the piston. A spring adjusting means to adjust the tension on the spring is also included. A piston assembly and valve assembly incorporating the piston biasing means are also described.