Pump assembly with tubular bypass liner with at least one projec

Details Pump assembly with tubular bypass liner with at least one projec Pump assembly with tubular bypass liner with at least one projec

1995-01-06

1996-10-22

Thorpe, Timothy S.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417300, 285 55, F04B 4900

Patent

active

055671250

ABSTRACT:
A pump assembly (20) includes a rotor (40) and a stator (38) which are disposed within a housing (24) and partially define pumping chambers (56). Fluid is conducted through an inlet passage (104) to an inlet cavity (58) which is connected with the pumping chambers (56). Fluid is conducted from the pumping chambers (56) to an outlet (62) from the pump assembly (20). A tubular passage liner (112) is disposed in the inlet passage (104) and has a straight passage (138) through which fluid flow is conducted to the inlet cavity (58). The tubular passage liner (112) prevents erosion of the housing (24) during conduction through the inlet passage (104) of inlet fluid and fluid bypassed from the outlet (62) of the pump assembly (20). Projections (204 and 206) at one end of the tubular passage liner (112) are engageable with the stator (38) to limit movement of the tubular passage liner relative to the stator. The tubular passage liner (112) is installed in the inlet passage (104) by first closing a slot (180) to reduce the cross-sectional size of the tubular passage liner. The tubular passage liner (112) is then inserted into the inlet passage (104). The slot (180) is then opened to increase the size of the tubular passage liner (112).

REFERENCES:
patent: 1096619 (1914-05-01), Gage
patent: 1871883 (1932-08-01), Geyer
patent: 2724335 (1955-11-01), Eames
patent: 2813488 (1957-11-01), Deska
patent: 3606659 (1971-09-01), Robbins
patent: 3738228 (1973-06-01), Harrison
patent: 3822965 (1974-07-01), Drutchas et al.
patent: 3828415 (1974-08-01), Kammeraad et al.
patent: 4026583 (1977-05-01), Gottlieb
patent: 4553908 (1985-11-01), Merz
patent: 4564338 (1986-01-01), Ilg
patent: 4575314 (1986-03-01), Teubler et al.
patent: 5267840 (1993-12-01), Snow et al.

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