Expansible chamber devices – Relatively movable working members – Interconnected with common rotatable shaft
Patent
1991-06-06
1992-07-07
Denion, Thomas E.
Expansible chamber devices
Relatively movable working members
Interconnected with common rotatable shaft
92129, 464 89, 403225, 403383, F01B 100
Patent
active
051273160
ABSTRACT:
A pump apparatus includes a plunger, an eccentric cam for moving the plunger toward a pressure chamber, a drive shaft supporting the eccentric cam, and an output shaft of a motor for imparting a rotational force to the drive shaft. A convex portion is formed on one end of one of the drive shaft and the output shaft whereas a concave portion is formed in one end of the other of the two shafts. The convex portion is fitted in the concave portion to interconnect the drive shaft and the output shaft. The convex portion is fitted in the concave portion with a clearance therebetween. A holder member for always holding the convex portion and the concave portion in engagement with each other in the direction of rotation of the drive shaft is provided at an area of fitting between the convex portion and the concave portion. With this arrangement, noises resulting from the impingement of one of the convex portion and the concave portion upon the other during the operation of the pump apparatus are eliminated.
REFERENCES:
patent: 3096106 (1963-07-01), Wanner
patent: 3473406 (1969-10-01), Runkle
patent: 3612728 (1971-10-01), Fulmer
patent: 3955905 (1976-05-01), Frommholtz et al.
patent: 4130002 (1978-12-01), Katz
patent: 4586845 (1986-05-01), Morris
patent: 4623278 (1986-11-01), Merrell
patent: 4714371 (1987-12-01), Cuse
Ishiwata Ichiro
Ohkuma Hiroshi
Denion Thomas E.
Nippon Air Brake Co., Ltd.
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