Gas booster assembly for fluid pressure piston driving apparatus

Details Gas booster assembly for fluid pressure piston driving apparatus Gas booster assembly for fluid pressure piston driving apparatus

1992-08-07

1993-10-12

Bertsch, Richard A.

Pumps

Motor driven

Fluid motor

417488, 92 85B, F04B 3500

Patent

active

052520420

ABSTRACT:
A first cylinder bore (7) for accommodating a first piston (8), a plunger bore (20) for accommodating a plunger (21), and a second cylinder bore (57) for accommodating a second piston (58) are provided in this order from above. The plunger (21) is fixed to the first piston (8). A cushion chamber (61), provided below the second piston (58), and an outlet (25b) of a second check valve (25) for gas discharge are connected to each other via a communicating passage (62). The second piston (58) is prevented from moving upward in excess of a set extent by a stopper (64) provided in the peripheral wall of the second cylinder bore (57).

REFERENCES:
patent: 2711697 (1955-06-01), Gibbs
patent: 3158048 (1964-11-01), Bollar
patent: 3431725 (1969-03-01), Chen
patent: 3805672 (1974-04-01), Pekrul
patent: 3835753 (1974-09-01), Bunyard
patent: 3938425 (1976-02-01), Kroffke
patent: 4042311 (1977-08-01), Yonezawa
patent: 4700611 (1987-10-01), Kaneko
patent: 4812109 (1989-03-01), Yonezawa
patent: 5050482 (1991-09-01), Yonezawa

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