Cam operated pump having lost motion shuttle

Details Cam operated pump having lost motion shuttle Cam operated pump having lost motion shuttle

2006-03-07

2006-03-07

Solak, Timothy P. (Department: 3746)

Pumps

Expansible chamber type

Biasing means effects induction stroke of abutment driven,...

C417S062000, C417S364000

Reexamination Certificate

active

07008198

ABSTRACT:
A peristaltic piston pump driven by a dedicated pump cam disposed on a camshaft of an engine. A plurality of valve-opening cams are disposed along the camshaft. The pump cam has a plurality of lobes equal in number to the number of valve cams and each pump lobe is disposed at 180° from a valve cam lobe such that the camshaft valve torque and secondary oil pump camshaft torque partially cancel, reducing overall camshaft torque oscillation. The pump includes a lost-motion shuttle and spring to permit continuous response of the pump to the cam.

REFERENCES:
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patent: 4632144 (1986-12-01), Walsworth
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patent: 5341777 (1994-08-01), Miura et al.
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patent: 5937806 (1999-08-01), Lyko et al.
patent: 6125828 (2000-10-01), Hu
patent: 6543400 (2003-04-01), Urckfitz et al.
patent: 6758184 (2004-07-01), Lee et al.

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