Browse Prior Art Database

Grease Free Stopcock

IP.com Disclosure Number: IPCOM000097252D
Original Publication Date: 1962-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Rohr, RL: AUTHOR

Abstract

The exploded view shows a greaseless stopcock in open position for use in either high vacuum systems or for clean gases.

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Grease Free Stopcock

The exploded view shows a greaseless stopcock in open position for use in either high vacuum systems or for clean gases.

The stopcock is formed of a TEFLON* valve plug 1 having raised keystone shaped patterns 3 oppositely disposed on the surface. Upper and lower horizontal legs 5 and 7 of patterns 3 are formed by arcs of raised circular patterns 9 which extend about the periphery of the valve plug.

When the stopcock is in closed position, patterns 3 fit about input conduit 11 and the output conduit 13, respectively. Vertical legs 15 and 17 of 3 prevent leakage between input and output conduits 11 and 13. Circular patterns 9 prevent leakage between valve plug 1 and the wall of the valve body 19. The reduced area of contact between patterns 3 and also circular patterns 9 and the wall of valve body 19 insures high contact pressures. Thus, the soft surface and elastic properties of the TEFLON effect a positive seal. *TEFLON is a trademark of DuPont.

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