Piston cap

Details Piston cap Piston cap

1991-01-11

1991-09-17

Halvosa, George E. A.

Brakes

Operators

Fluid pressure

74 182, 92 98D, 188 724, 277 29, 277201, 277212FB, B60T 1100

Patent

active

050486489

ABSTRACT:
The present invention relates to a piston cap for a disc brake, comprising a brake motor consisting of a piston (24) sliding in a cylinder (26), this cap being composed of a flexible material ensuring sealing between the piston (24) and the cylinder (26) by way of a bead (32) located on its inner periphery and coming to rest in an annular groove (34) made in the head of the piston (2) and of a retention part on its outer periphery, capable of coming in contact with the inner wall of a receptacle formed at the end of the cylinder, this retention part comprising a metal insert (36) in the form of a cylindrical ring. According to the invention, the cap possesses at least one vent allowing the air contained in the volume which it delimits with the piston (24) and the cylinder (26) to escape and preventing the entry of foreign bodies or corrosive agents into this volume.

REFERENCES:
patent: 2977138 (1961-03-01), Brittain, Jr.
patent: 3175834 (1965-03-01), Wallace et al.
patent: 3528301 (1970-09-01), Wasmer
patent: 4154546 (1979-05-01), Merrick et al.
patent: 4327925 (1982-05-01), Alexander et al.
patent: 4921258 (1990-05-01), Fournier et al.

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