Disc brake piston

Details Disc brake piston Disc brake piston

1990-12-31

1992-04-21

Look, Edward K.

Brakes

Wheel

Axially movable brake element or housing therefor

188370, 92172, 92168, F16D 5518, F16J 100

Patent

active

051059177

ABSTRACT:
A disc brake piston is formed from a stamping operation and is preferably constructed from stainless steel. The piston includes a hollow cylindrical body having a closed end and an open end. In one preferred embodiment, the open end is provided with a radially outwardly extending flange which defines an annular abutment surface for engaging a backing plate of a disc brake shoe. An integral boot groove is formed in the cylindrical body adjacent the open end thereof, and produces a raised portion on an inner surface of the body portion directly opposite the groove. This results in the piston having a substantially uniform wall thickness throughout the entire length of the cylindrical body. Also, the piston can include a dome-shaped recess formed in the closed end thereof, which can be provided with radial strengthening ribs.

REFERENCES:
patent: 3804212 (1974-04-01), Haraikawa
patent: 4170926 (1979-10-01), Emmett
patent: 4193179 (1980-03-01), Confer et al.
patent: 4354303 (1982-10-01), Staley
patent: 4428461 (1984-01-01), Warwick
patent: 4530312 (1985-07-01), Kanda et al.
patent: 4553644 (1985-11-01), Folch
patent: 4565265 (1986-01-01), Woolley
patent: 4887449 (1989-12-01), Kanai et al.

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