Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1975-10-20
1977-03-15
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
417437, 417458, 417489, F04B 4900, F04B 2102
Patent
active
040121747
ABSTRACT:
The invention is concerned with an improvement in a manually activated fuel priming pump for an internal combustion engine comprising a housing having a barrel communicating at its lower end with a flange disposed transversely to the barrel. A plunger communicates at its upper end with a handle, the plunger being reciprocally mounted in a chamber of the barrel to selectively pump fuel from a first to a second valve located in the flange of the housing. The plunger has around the periphery thereof means slidingly sealing it with low friction against a bore defining the chamber. The improvement of the invention comprises a member co-axial with the plunger and extending therefrom towards the flange and member-bore seal means slidably sealing said member to said bore and disposed to allow flow of said fuel from a space within said chamber between said plunger and said flange to said second valve and to retard flow of said fuel in a reverse direction.
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patent: 3680985 (1972-08-01), Ginsberg
patent: 3803988 (1974-04-01), Orr
patent: 3805672 (1974-04-01), Pekrul
Seibel Jack N.
Stump Ronald C.
Caterpillar Tractor Co.
Freeh William L.
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