Title:
MULTIPLE SEAL FOR A PRESSURE VESSEL
Document Type and Number:
WIPO Patent Application WO/1987/007685
Kind Code:
A1
Abstract:
The pressure vessel comprises an accumulator (10) having a piston (16) disposed in a bore (14). The piston (16) has gas under pressure on one side thereof maintained within the bore (14) by means of a multiple seal in an opening (26) having first (28), second (32), and third diameter (36) sections. The multiple seal includes a fill screw (40) threadedly engaging the second diameter section (32) of the opening (26), the fill screw (40) having a conical surface (46) sealingly engaging a seat (31) between the first diameter (28) and second diameter (32) sections of the opening. A cap screw (70) is threadedly received within the third diameter section (36) and compresses an O-ring (60) between the cap screw (70) and housing (12). The cap screw (70) has an annular rib (77) which bites into a shoulder (34) of the body (12) to provide an additional seal for maintaining the gas under pressure within the bore (14).
Inventors:
FULMER KEITH HAROLD (US)
Application Number:
PCT/US1987/000568
Publication Date:
December 17, 1987
Filing Date:
March 10, 1987
Export Citation:
Assignee:
ALLIED CORP (US)
International Classes:
B60T17/06; F15B1/08; F16J13/12; F15B1/24; F16J15/00; F16L55/053; (IPC1-7): F15B1/04; F16F9/43; F17C13/06
Foreign References:
| FR2555280A1 | 1985-05-24 | |||
| GB2109086A | 1983-05-25 | |||
| US4015819A | 1977-04-05 | |||
| DE8601331U1 | 1986-03-06 | |||
| US1491764A | 1924-04-22 |
Other References:
See also references of EP 0308402A1
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