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United States of America Patent
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Dec 24, 1996
Grant Date -
N/A
app pub date -
Sep 8, 1994
filing date -
Sep 14, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
One of the hand wheel and the brake ratchet wheel is provided with a cover portion extending toward the other thereof and having a circular peripheral surface which covers the lining plate, and the other of the hand wheel and the brake ratchet wheel is provided with a circular opposite peripheral surface opposed to the circular peripheral surface, so that opposite peripheral surfaces of those circular peripheral surfaces can be arranged adjacently to each other or have a scaling member interposed therebetween. Therefore, even when dust and rainwater enter a wheel cover for a hand wheel, these dust and rainwater can be prevented from further entering a mechanical brake.
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