Secondary sealing device

Details Secondary sealing device Secondary sealing device

1975-07-07

1976-03-30

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277103, 277142, F16J 1506, F16J 1524

Patent

active

039470440

ABSTRACT:
A secondary sealing device is provided for a pump used for pumping gases under pressure. Leakage of gas between a main seal and the pump shaft is permitted up to a predetermined maximum pressure but once that pressure has been exceeded, a pressure sensor activates a switch to stop rotation of the pump shaft. When the shaft has come to a halt, a high pressure gas such as nitrogen is introduced into a secondary seal circumferential of the shaft whereby a resilient sealing ring is forced into tight sealing contact with the pump shaft to prevent any further leakage of the pumped gas to the atmosphere.

REFERENCES:
patent: 1089789 (1914-10-01), Ramberg
patent: 3012611 (1961-12-01), Haines
patent: 3228703 (1966-01-01), Wilson
patent: 3529835 (1970-09-01), Lewis
patent: 3582088 (1971-06-01), Matsuzaki
patent: 3888495 (1975-06-01), Mayer

Affiliated with

Also associated with

Rating

Secondary sealing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Secondary sealing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secondary sealing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-517245