Tanden-type vacuum booster

Details Tanden-type vacuum booster Tanden-type vacuum booster

1988-11-03

1990-03-06

Garrett, Robert E.

Expansible chamber devices

Plural flexible wall working members

92 98D, 91376R, F01B 1902, F15B 910

Patent

active

049055739

ABSTRACT:
A tandem-type vacuum booster having a partition plate providing front and rear chambers with a booster piston and diaphragm in each chamber. A piston boss is slidably supported on the partition plate and a connecting cylinder is formed on the front chamber booster piston. A press plate is provided on the piston boss and the rear booster piston and an end plate of the connecting cylinder are coupled to the piston boss by the press plate and a plurality of bolts disposed around the piston boss with the rear booster piston and diaphragm clamped between the press plate and piston boss. The front ends of the bolts are disposed to come closer to the piston boss axis than the rear ends. The bolt heads are also received in recesses provided in the press plate to prevent relative rotation between the bolts and press plate.

REFERENCES:
patent: 2980068 (1961-04-01), Stelzer
patent: 3478519 (1969-11-01), Eggstein
patent: 3603208 (1971-09-01), Kytta
patent: 3613506 (1971-10-01), Kytta
patent: 4475444 (1984-10-01), Hendrickson
patent: 4587884 (1986-05-01), Tsubouchi
patent: 4718328 (1988-01-01), Mori et al.

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