Friction bearing and method of making such a bearing

Details Friction bearing and method of making such a bearing Friction bearing and method of making such a bearing

1977-05-02

1979-02-06

Lanham, C. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

264264, 264267, 264134, 264135, 264136, 264137, 264258, 308238, 308239, 308DIG8, 156293, 156288, 156245, 291495B, 291495DP, 291495NM, B21D 5310

Patent

active

041376188

ABSTRACT:
Spherical friction or sliding bearings are produced by first making a laminate from a layer of a thermosetting resin and a layer of material having a low friction coefficient. The thermosetting resin is used to impregnate a first web or fabric. The low friction coefficient material may be provided in the form of a further webbing or fabric, for instance, made of polytetrafluoroethylene. The thermosetting material may, for example, be a phenolic resin which is at this point of manufacture in its A-state and hence tacky. In order to permit the immediate further processing of the laminate with the thermosetting resin still in its tacky A-state, a dry adhesive film which neutralizes the tackiness, is applied to the laminate in sandwich formation which is then cut into pieces or strips of suitable size. The sandwich strips are then placed into a mold and pre-shaped and precision cut at room temperatures while the resin is still in its A-state. The pre-shaped low friction coefficient laminate is then assembled with the outer and inner bearing members and heated under pressure to such an extent that the thermosetting resin changes substantially from its A-state to its C-state while rapidly passing through the B-state.

REFERENCES:
patent: 2838436 (1958-06-01), Clingman
patent: 3202749 (1965-08-01), White
patent: 3231963 (1966-02-01), Berar et al.
patent: 3238602 (1966-03-01), White
patent: 3507022 (1970-04-01), Conru
patent: 3522975 (1970-08-01), White
patent: 3582166 (1971-06-01), Reising
patent: 3594049 (1971-07-01), Turner
patent: 3873168 (1975-03-01), Viola et al.
patent: 3900408 (1975-08-01), Turner

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