Pumps – Expansible chamber type – Having separate noncyclic valve
Patent
1985-03-27
1987-03-17
Croyle, Carlton R.
Pumps
Expansible chamber type
Having separate noncyclic valve
415 93, 415213T, 251148, 138146, F04B 1700, F04D 500
Patent
active
046504044
ABSTRACT:
A motor-driven regenerative type fuel pump is provided with an overflow mechanism disposed adjacent to a discharge pipe. The overflow mechanism includes a plug hole in a pump housing and a plug member disposed in the plug hole. The pump housing is formed with an axially inclined recess circumferentially extending around the plug member and communciated with an axial groove formed in the plug member. The rate of overflow of fuel and thus the upper limit of the pump discharge can be adjusted by rotating the plug member relative to the plug hole to compensate for any insufficiency of pressure regulating ability of a pressure regulator in an engine fuel injection system. The overflow mechanism further includes an adjustment-locking member attached to the pump housing and the plug member after the overflow-adjustment by the manufacture has been completed.
REFERENCES:
patent: 108579 (1870-10-01), Ford
patent: 412480 (1889-10-01), Davis
patent: 1265070 (1918-05-01), Feyzes
patent: 2251552 (1941-08-01), Purdy
patent: 2404996 (1946-07-01), Thrush
patent: 2640497 (1953-06-01), Reeve
patent: 2927601 (1960-03-01), Martin et al.
patent: 3677516 (1972-07-01), Hicks
patent: 4508492 (1985-04-01), Kusakawa et al.
Croyle Carlton R.
Nippondenso Co. Ltd.
Olds Theodore W.
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