Safety device for primary pump

Details Safety device for primary pump Safety device for primary pump

1993-01-21

1995-09-12

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 27, 277 81R, F16J 1540

Patent

active

054491800

ABSTRACT:
The invention relates to a safety device that ensures longitudinal sealing of the shaft of a primary pump following the rupture of one of the seals separating the high-pressure chamber from the low-pressure chamber of the fluid in the pump, the device made up of a hollow piston comprising an upstream side part of outer diameter D1, and a downstream side part of outer diameter D3, greater than D1, the piston coaxially surrounding the shaft and being placed in a chamber made in the seal housing, the device also comprising activation means which axially move the piston against the shaft when a seal ruptures, wherein two annular chambers are made on the downstream side of the piston, the first, whose outer diameter D2 is greater than D1, communicating with the low-pressure chamber.

REFERENCES:
patent: 2834619 (1958-05-01), McNab
patent: 3096985 (1963-07-01), Biheller
patent: 3580587 (1971-05-01), Hessheim
patent: 3679217 (1972-07-01), Lesiecki
patent: 3926442 (1975-12-01), Muller
patent: 4722663 (1988-02-01), Swearingen
patent: 4848774 (1989-07-01), Nyilas et al.
patent: 4895394 (1990-01-01), Delamare

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