Brakes – Internal-resistance motion retarder – Using a rotary-type fluid damper
Patent
1988-04-25
1989-05-16
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Using a rotary-type fluid damper
16 82, 16 85, 188291, 192 12A, 192 12BA, 192 41S, 267155, F16D 5700, F16D 5702, F05F 508, B60K 4124
Patent
active
048301515
ABSTRACT:
A damper for damping rotation has a construction in which a rotor having a braking plate immersed in oil disposed within a casing and a gear are coupled together by a means of a clutch spring in the form of a coil spring. When the gear is rotated in one direction, it is coupled with the rotor as a result of diametrical contraction of the spring, and a restoring force is stored within the clutch spring, thus producing a resistance against rotation. When it is rotated in the opposite direction, the restoring force of the clutch spring is released so as to permit free rotation of the gear. The coil spring is coiled about a shouldered portion of the rotor shaft and a lower portion of a gear sleeve, supporting the gear, which have the same diametrical extent. In this manner, projecting end portions of the spring, upon which excessive loads have been impressed within the prior art, are able to be eliminated thereby providing extended service life to the spring and damper assembly.
REFERENCES:
patent: 4365525 (1982-12-01), Imazaike
patent: 4697673 (1987-10-01), Omata
Nifco Inc.
Oberleitner Robert J.
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