Piston biasing means

Details Piston biasing means Piston biasing means

1982-09-24

1989-01-03

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251 634, 137863, 137869, 92130R, F16K 31122, F16K 700

Patent

active

047951303

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.

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patent: 4333500 (1982-06-01), Broerman
patent: 4335744 (1982-06-01), Bey
patent: 4423800 (1984-01-01), Kobiske et al.

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