Cam roller follower

Details Cam roller follower Cam roller follower

1981-06-18

1983-09-27

Feinberg, Craig R.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 905, 123 9051, F01L 116

Patent

active

044062575

ABSTRACT:
Prior art roller followers have generally been relatively expensive to produce and provisions have had to be made to deliver pressurized lubricant to bushings which have been used as bearings for the roller. Such roller followers have also been made with partially open apertures for bearings, thus eliminating the need for pressurized lubrication, but in such roller followers there is a tendency for the rollers to fall out of the open apertures. These probelms are solved herein by forming the body (16) and bearing surfaces (26,28) of a roller follower (10) in two parts, an inner structure (20) which supports the bearing surfaces (26,28) and an outer structure (18) which surrounds the inner structure (20) and fastens the entire assembly (10) together. Preferably, the inner structure (20) comprises a pair of half tubular shells (22,24) which fit together and include flanges (40,41) for keeping the roller (12) in contact with the bearing surfaces (26,28). The principal use of such a roller follower (10) is in engines wherein the roller (12 ) contacts a camshaft and an end (44) of the roller follower removed from the roller (12) motivates a push rod against the force of a spring, thus causing the rod to reciprocate.

REFERENCES:
patent: 992089 (1911-05-01), Watt
patent: 1565223 (1925-12-01), Church
patent: 1802330 (1931-04-01), Boland
patent: 3089472 (1963-05-01), Thompson
patent: 3291107 (1966-12-01), Cornell
patent: 4173954 (1979-11-01), Speckhart
patent: 4335686 (1982-06-01), Clouse

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