Shut off valve assembly about a shaft of a device having an...

Details Shut off valve assembly about a shaft of a device having an... Shut off valve assembly about a shaft of a device having an...

2007-07-03

2007-07-03

Sorkin, David (Department: 1723)

Seal for a joint or juncture

Seal between fixed parts or static contact against...

Contact seal for other than internal combustion engine, or...

C277S370000, C277S637000, C277S914000, C366S331000, C366S608000

Reexamination Certificate

active

11012525

ABSTRACT:
The invention is a shut-off seal assembly for use with the drive assembly of fluid-containing vessels. The shut-off seal assembly first locks the seal carrier of the drive assembly in place so that it may not rotate in a clockwise or a counter-clockwise direction. The seal carrier includes a pair of notches into which a pawl may be fitted preventing seal carrier rotation. The seal carrier surrounds a sleeve which includes a plurality of slots. A backwards rotation of the drive shaft causes drive pins to slide in the angled slots, thereby causing the seal element to move forward and create a seal between the drive assembly and the vessel.

REFERENCES:
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patent: 4511255 (1985-04-01), Saucier
patent: 4878677 (1989-11-01), Larkins et al.
patent: 5078506 (1992-01-01), Tischer
patent: 5303933 (1994-04-01), Larkins
patent: 5690341 (1997-11-01), Prough et al.
patent: 6193409 (2001-02-01), Brunson et al.
patent: 6616326 (2003-09-01), White
patent: 6742923 (2004-06-01), Blakley et al.
patent: 6746147 (2004-06-01), Blakley et al.
patent: 41984/85 (1986-11-01), None

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