Cam ring bearing for fuel delivery system

Details Cam ring bearing for fuel delivery system Cam ring bearing for fuel delivery system

2007-07-24

2007-07-24

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

With changeable working chamber magnitude

By cylinder or cylinder portion pivotal movement

C418S031000, C418S173000, C384S308000

Reexamination Certificate

active

10521637

ABSTRACT:
A bearing assembly is provided for a fuel delivery system that includes a pump (10) having a housing that rotatably receives a rotor (20) carrying vanes (26) thereon, a cam ring (70) received between the housing and rotor (20), and a support member of yoke (50) encompassing the cam ring (70) to selectively vary fuel flow. The bearing assembly (80) is a journal bearing between the yoke (50) and the cam ring (70) and includes an annular surface having a central opening therethrough. The annular surface includes a first, high pressure pad (102) and a second, low pressure pad (104) substantially diametrically opposite the first pad and separated by first and second lands (106, 108). The circumferential extent of the first pad (102) is at least as great as an inner diameter of the cam ring (70). Circumferential ends of the second pad (104) are wider than circumferential ends of the first pad. The first and second pads (102, 104) are formed by circumferentially extending grooves that extend an entire width of the bearing so that the cam ring moves between the first and second pads, and thereby varies a clearance between the lands (106, 108) and the cam ring (70).

REFERENCES:
patent: 1671240 (1928-05-01), Gurley
patent: 2241824 (1941-05-01), Meyerhoefer
patent: 2635551 (1953-04-01), DeLancey
patent: 3143079 (1964-08-01), Carner
patent: 5518380 (1996-05-01), Fujii et al.
patent: 2074247 (1981-10-01), None
patent: 59108891 (1984-06-01), None
patent: 59-188077 (1984-10-01), None
patent: 02-086982 (1990-03-01), None

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