Disc brake with automatic adjustment
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United States of America Patent
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Apr 28, 1987
Issued Date -
N/A
app pub date -
Sep 15, 1986
filing date -
Dec 23, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The subject of the invention is a disc brake with automatic adjustment of the type incorporating a caliper (10) mounted to slide on a fixed support by way of at least one axial pin, a brake motor (34) acting directly on a first friction element (26) and as a result of reaction via the caliper (10) on a second friction element (30). The brake motor (34) incorporates a mechanical control (48, 50, 54) acting on a hydraulic control piston (36) via an automatic-adjustment device. The automatic-adjustment device is formed by a screw (68) -and-nut (88) system of reversible pitch, which is actuated by the piston (36) beyond a predetermined stroke of the latter. According to the invention, a monitoring piston (80) immobilizes a sleeve (114) fixed in rotation to the nut (88), when the hydraulic control pressure reaches a predetermined value. The invention is used for the braking of motor vehicles.
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