Liquid pump

Details Liquid pump Liquid pump

1997-06-26

1999-04-06

Lopez, F. Daniel

Expansible chamber devices

With assembly or disassembly facilitating means

92129, 92130R, 92168, 92255, 417470, F01B 2900

Patent

active

058904158

ABSTRACT:
A liquid pump has a pump head, a head holder which can be assembled with the pump head and a housing connected to the head holder, providing an internal space which connects to a liquid flow route through the pump head. A plunger assembly is disposed inside this internal space, having a plunger rod which penetrates the head holder and reaches the flow route, and a male screw part. A cross head for driving the plunger assembly is also inside this internal space, and a return spring is supported between the head holder and this cross head so as to provide a biasing force thereto. The cross head has a female screw part which is engageable with the male screw part of the plunger assembly. The plunger assembly has a hexagonal flange to which a dedicated simple jig can be engaged to rotate the plunger assembly and to thereby engage or disengage them.

REFERENCES:
patent: 1977075 (1934-10-01), Magnuson
patent: 2204626 (1940-06-01), Scott
patent: 3747478 (1973-07-01), Dunn et al.
patent: 3940151 (1976-02-01), Phillips
patent: 5078580 (1992-01-01), Miller et al.

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