Disk brake assembly with piston retraction seal

Details Disk brake assembly with piston retraction seal Disk brake assembly with piston retraction seal

1996-08-28

1998-10-27

Poon, Peter M.

Brakes

Wheel

Axially movable brake element or housing therefor

188 724, 277177, F16D 5502

Patent

active

058266810

ABSTRACT:
A disk brake assembly has a piston retraction structure which can keep the space between the pad and the disk constant while the brake is not being applied by varying the distance the piston is retracted with the fluid pressure applied to the disk brake. The piston retraction structure has a piston seal fitted in a seal groove formed in the inner surface of a cylinder of a caliper. When a piston is advanced under fluid pressure, the piston seal is pulled by the piston and deformed until it fills up the gap defined by a chamfer formed along the edge of the seal groove. When the fluid pressure is removed thereafter, the piston is retracted by the resilient restoring force of the deformed piston seal. The piston seal is made of a rubber having a hardness of 80 IRH or more. In another arrangement, the piston seal has its outer-diameter portion fitted in the seal groove with a zero gap or with an interference. By further adjusting the size of the chamfer, it is possible to vary the distance the piston is retracted with the fluid pressure in an ideal manner.

REFERENCES:
patent: 2360734 (1944-10-01), Smith
patent: 2360735 (1944-10-01), Smith
patent: 3377076 (1968-04-01), Burnett
patent: 3582093 (1971-06-01), Lucien
patent: 3655204 (1972-04-01), Sievenpiper
patent: 4352498 (1982-10-01), Burke et al.
patent: 4387901 (1983-06-01), Ritsema
patent: 4526383 (1985-07-01), Fuchs et al.
patent: 4796858 (1989-01-01), Kabel
patent: 5325940 (1994-07-01), Rueckert et al.

Affiliated with

Also associated with

Rating

Disk brake assembly with piston retraction seal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk brake assembly with piston retraction seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk brake assembly with piston retraction seal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1607202