Expansible chamber devices – Relatively movable working members – Interconnected with common rotatable shaft
Patent
1998-06-04
2000-04-25
Nguyen, Hoang
Expansible chamber devices
Relatively movable working members
Interconnected with common rotatable shaft
417269, 417366, 92153, 92154, F01B 300
Patent
active
06053091&
ABSTRACT:
A plunger pump comprising a plunger pump section (34) including a pumping chamber (60), a plunger (36) extending through the pumping chamber, a high pressure side-seal (58) and a low pressure side-seal (56) provided in slide contact with the plunger for preventing leakage of fluid from the pumping chamber, an annular and sealing through which a plunger (36) slidably extends into the pumping chamber (60), and an annular space (62) being defined between the high pressure side-seal (58) and the low pressure side-seal (56) so that it can receive liquid from a suction port (74) for lubrication of the plunger. Even when the plunger pump section (34) is installed at a predetermined or any circumferencial position, air is intended to be vented from the annular space (62). For this purpose, three circumferencially spaced channels (78) are formed in an inner wall of a manifold member (18) surrounding a sleeve (52) defining the pumping chamber (60) and communicate at their ends with the suction port (74) and (62).
REFERENCES:
patent: 4321019 (1982-03-01), Degawa et al.
patent: 4544331 (1985-10-01), Shibuya
patent: 5772407 (1998-06-01), Kato et al.
patent: 5785150 (1998-07-01), Tominaga et al.
patent: 5795139 (1998-08-01), Ikeda et al.
Maruyama Mfg. Co. Inc.
Nguyen Hoang
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