Fuel injection pump

Details Fuel injection pump Fuel injection pump

2007-09-18

2007-09-18

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Relatively movable working members

Interconnected with common rotatable shaft

Reexamination Certificate

active

11121913

ABSTRACT:
In a fuel injection pump, a tappet is provided on an end thereof on a side of a cam ring with a hollow. Force acting on the tappet from a plunger due to fuel pressure is dispersed to a sliding contact surface outside the hollow so that contact face pressure between the tappet and the cam ring is smaller. As the fuel pressure becomes higher, larger resilient deformation of the tappet causes a diameter of the hollow smaller so that the tappet comes in flat slidable contact with the cam ring, resulting in preventing the contact portion between the tappet and the cam ring from being seized with frictional heat.

REFERENCES:
patent: 3036557 (1962-05-01), Kimsey
patent: 3628425 (1971-12-01), Morita et al.
patent: 5979297 (1999-11-01), Ricco
patent: 6077056 (2000-06-01), Gmelin
patent: 6289875 (2001-09-01), Shinohara et al.
patent: 6350107 (2002-02-01), Hamutcu
patent: 6910407 (2005-06-01), Furuta
patent: 11-280641 (1999-10-01), None
patent: 2000-054935 (2000-02-01), None
patent: 2000-145572 (2000-05-01), None
Japanese Office Action mailed May 12, 2006 in corresponding JP Appln. No. 2002-005026.
Japanese Office Action mailed Aug. 8, 2006 in corresponding JP Appln. No. 2002-005026, with translation.

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