Fluid pressure booster

Details Fluid pressure booster Fluid pressure booster

1987-05-29

1988-08-30

Smith, Leonard E.

Pumps

Intensifier

417393, 91329, 91341A, 91350, F04B 1700

Patent

active

047672820

ABSTRACT:
There is described a fluid pressure booster including a pair of cylinders connected to the opposite sides of a central partition wall of a casing with an inlet port, an outlet port and air exhaust ports, a pair of pistons reciprocable in the cylinders and defining a boosting chamber and a drive chamber in each cylinder, and a switch valve adapted to supply a line air pressure alternately to the drive chambers of the two cylinders, thereby reciprocating the pistons to intensify the fluid pressure in the boosting chambers. The switch valve of the booster is provided with a spool stall preventive means which is arranged to suppress the pressing force on the valve body of the switch valve with the fluid pressure or biasing action of a spring until the valve body reaches the neutral position thereof and to encourage the pressing action on the valve body with a biasing force after reaching the neutral position to prevent stalls of the valve body at that position.

REFERENCES:
patent: 1453561 (1923-05-01), Willshaw
patent: 1839540 (1932-01-01), Farr
patent: 2702006 (1955-02-01), Bachert
patent: 2925782 (1960-02-01), Sharpe et al.
patent: 2977040 (1961-03-01), Dulebohn et al.
patent: 3402642 (1968-09-01), Van Hecke et al.

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