Brakes – Internal-resistance motion retarder – Including protective shield for retarder
Patent
1997-05-28
1999-09-21
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Including protective shield for retarder
267 6427, F16F 938
Patent
active
059541687
ABSTRACT:
A dust cover includes a bellows-like portion which is comprised of a large-pitched portion and a small-pitched portion in succession, each having a plurality of alternating ridges and grooves of uniform diameter. The ridges and grooves of the large-pitched portion are spaced at an equal but large pitch while the ridges and grooves of the small-pitched portion are spaced at an equal but smaller pitch. The ridges of the small-pitched portion have a thickness smaller than that of the ridges of the large-pitched portion. When a force is applied to the dust cover in a direction of contraction, the dust cover first contracts at the small-pitched portion and then at the large-pitched portion, whereby undesired buckling thereof is kept to a minimum. A method for blow molding the dust cover is also disclosed.
REFERENCES:
patent: 2942838 (1960-06-01), Peters
patent: 4114460 (1978-09-01), Oto
patent: 4969542 (1990-11-01), Athmer et al.
patent: 5161454 (1992-11-01), Fraiser
Nakatani Keiichiro
Tanaka Nobuhide
American Showa, Inc.
Oberleitner Robert J.
Siconolfi Robert A.
Tigerpoly Mfg., Inc.
Tigers Polymer Corp.
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