Brakes – Position adjusters – Slack
Patent
1988-06-07
1990-04-17
Halvosa, George E. A.
Brakes
Position adjusters
Slack
188 719, 192111A, F16D 6556
Patent
active
049172204
ABSTRACT:
An automatic gap control apparatus for a disc brake with a parking brake comprises a cup-shaped piston having a bottom, the piston is slidably mounted inside the brake operating cylinder, a rod having a through hole slidably fitted inside the body, which is prevented from rotating and provided with a one-way reversible thread, a sleeve nut having a concave portion at an end thereof, which is provided at a front end thereof an abutting portion abutting against the bottom of the piston and threadably engaged with the one-way reversible thread of the rod thereby forming a length adjusting mechanism, a small piston having a large diameter head, which is fitted in the through hole of the rod, and the large diameter head is fitted in the concave portion of the sleeve nut, and a spring member provided between the cup-shaped piston and the sleeve nut, which urges the sleeve nut. When the fluid pressure applied to the brake operating cylinder exceeds a predetermined value, the fluid pressure urges the large diameter head to bend the coil spring thereby preventing the sleeve nut from rotating relative to the rod.
REFERENCES:
patent: 3610373 (1921-10-01), Burnett
patent: 3900084 (1975-08-01), Farr
patent: 4246985 (1981-01-01), Shimizu
patent: 4294335 (1981-10-01), Maehara
patent: 4637498 (1987-01-01), Thompson et al.
patent: 4660684 (1987-04-01), Carre et al.
Akebono Brake Industry Co. Ltd.
Halvosa George E. A.
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