1978-03-24
1981-06-23
Butler, Douglas C.
Cutlery
308238, 308240, F16C 3372
Patent
active
042746841
ABSTRACT:
The bearing is configured to retain oil by capillary action. In one embodiment, a lubricant recess is provided at each end of the bearing, which recess may be completely open to the atmosphere, provided that there is an abrupt edge joining the recess to the end of the bearing, and further provided that the recess is large enough (1) to accommodate the lubricant in the bearing and (2) to permit skewing of the bearing shaft without resulting contact between the bearing shaft and the wall of the recess. An additional recess, referred to as a pressure distribution groove, may also be provided in the bearing inward of the end recess. Alternatively, a reservoir groove capable of accommodating the bearing lubricant may be provided at each end of a bearing having no open recess, which reservoir groove is separated from the bearing end by a narrow baffle. A pressure distribution groove may also be provided in combination with the reservoir groove. In a final embodiment, for high performance applications, the bearing includes an open end recess, an adjacent reservoir groove and a pressure distribution groove.
REFERENCES:
patent: 2884285 (1959-04-01), King, Jr.
patent: 3183009 (1965-05-01), Kunel
patent: 3810636 (1974-05-01), Gorski
patent: 4134596 (1979-01-01), Kawai et al.
"The Science of Clocks and Watches", A. L. Rawlings, Second Edition, Pitman Publishing Company.
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