Power piston assembly for booster

Details Power piston assembly for booster Power piston assembly for booster

1994-09-09

1995-07-25

Lopez, F. Daniel

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

403375, F01B 1904

Patent

active

054352312

ABSTRACT:
An improvement of an axial portion of a power piston and a retainer engaging therewith for a booster. An axial portion of the power piston is formed with a first tubular portion, which is provided with a second tubular portion located outward of the first tubular portion. The first tubular portion is fitted over a flange of a valve body from the rear side, and an annular retainer engages the second tubular portion from the front side, thereby securing the axial portion of the power piston, which is formed with the both tubular portions, on the flange of the valve body. The retainer includes a plurality of engaging pawls, which engage the outer peripheral surface of the second tubular portion of the power piston by point contact. This reduces the axial size of the valve body, and hence the axial size of the booster.

REFERENCES:
patent: 2495209 (1950-01-01), Chilo
patent: 4747336 (1988-05-01), Uyama
patent: 4787292 (1988-11-01), Tsuyuki et al.
patent: 4951550 (1990-08-01), Ohki et al.
patent: 5287793 (1994-02-01), Satoh et al.
patent: 5337650 (1994-08-01), Uyama

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