Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1991-03-19
1992-11-24
Smith, Leonard E.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
60494, F04B 4908
Patent
active
051658658
ABSTRACT:
A detachable intake neck connection for a pump which prevents aspiration of air into the hydraulic pump if a suction line is missing. The hydraulic pump has a first neck bore that, communicates with a suction chamber, which tightly receives an intake hose nipple of a suction line. The pump has a second neck bore for a pressure line, this second bore communicates with a pressure chamber. A connecting bore 31 that communicates with the pressure chamber of the pump begins at the neck bore for the intake hose nipple and is tightly closed by the intake hose nipple introduced into the neck bore. If the intake hose nipple is missing, the pressure chamber of the pump is short-circuited to the suction chamber through the connecting bore. A buildup of pressure in the pump and hence pumping of air is therefore precluded, the hydraulic pump is usable for instance for hydraulic vehicle brake systems, in which for safety reasons, the aspiration of air into the brake system must be prevented.
REFERENCES:
patent: 1818097 (1931-08-01), Petrelli
patent: 2883394 (1959-04-01), Roosa
patent: 2977888 (1961-04-01), Livermore
patent: 3628893 (1971-12-01), Carpigiani
patent: 4749192 (1988-06-01), Howeth
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
Smith Leonard E.
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