Pump with openable seal

Details Pump with openable seal Pump with openable seal

1999-01-28

2000-12-26

Walberg, Teresa

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417220, 418 30, F04B 4900, F01C 2116

Patent

active

061649287

ABSTRACT:
A pump for supplying fluid, in particular hydraulic oil, comprises a drive shaft extending into the interior of the pump housing and the shaft is mounted on at least one bearing device lubricated by a partial flow of the fluid supplied. A sealing device seals the radial gap between the housing of the pump and the drive shaft. The sealing device comprises a sealing ring of substantially U-shape cross-section. One arm of the U forms a first sealing portion resting against the drive shaft under pre-stress. The other arm of the U forms a second sealing portion resting under pre-stress against a sealing face of the housing surrounding the drive shaft. The sealing ring has a sealing area connecting the first and second sealing portions and forming the base of the U and facing the interior of the pump so that the first and second sealing portions extend from the sealing area in a direction away from the interior of the pump.

REFERENCES:
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patent: 5081907 (1992-01-01), Nagel et al.
patent: 5267840 (1993-12-01), Snow et al.
patent: 5289681 (1994-03-01), Iwata
patent: 5540560 (1996-07-01), Kimura et al.
patent: 5545014 (1996-08-01), Sundberg et al.
patent: 5716201 (1998-02-01), Peck et al.
patent: 5807090 (1998-09-01), Agner
patent: 6042343 (2000-03-01), Semba et al.
Trutnovsky, Karl, "Beruhrungsdichtungen an ruhenden und bewegten Maschinenteilen", Konstruktionsbucher, 1958.

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