Slide, particularly pipe bridge slide

• US 5,927,684 A
• Filed: 03/18/1997
• Issued: 07/27/1999
• Est. Priority Date: 10/23/1996
• Status: Expired due to Term

• Current Assignee: Z&J Technologies GmbH (IMI PLC)
• Original Assignee: Zimmermann and Jansen Incorporated (IMI PLC)
• Inventors: Nagler, Gunter, Marx, Norbert
• Primary Examiner(s): Reichard, Lynne
• Assistant Examiner(s): BINDA, GREGORY JOHN
• Application Number:
  US08/819,920
• Time in Patent Office: 861 Days
• Field of Search: 277/602, 277/608, 277/616, 277/618, 277/627, 277/927, 277/938, 277/379, 277/377, 277/500, 277/385, 251/157, 251/170, 251/194, 251/195, 251/196, 251/327, 251/328, 251/203
• US Class Current: 251/203
• CPC Class Codes: F16K 3/20 by movement of the seats

Abstract

Single-plate slide, especially single-plate pipe bridge slide (10) with a slide-plate (16) and if necessary a pipe bridge (20), which is or are movable by means of an actuating device (18, 19) within this casing (11) in order to close or open a fluid passage (17) formed in a casing (11), the slide plate (16) or pipe bridge (20) having lateral seal surfaces which correspond with seal surfaces located on the casing side, especially annular seal surfaces (14, 15). At least one of the seal surfaces (14, 15) on the casing side forms part of a seal ring (23) located in the casing (11), which abuts with resilient pre-stressing on the facing seal surface of the slide plate (16) or pipe bridge (20).

Claims

1. A valve adjustable between an open position and a closed position with respect to a fluid passage therethrough, said fluid passage defining a flow axis, said valve comprising:

a casing having at least one annular groove formed therein, the annular groove having a surface generally coaxial with the flow axis;

a slide plate disposed within said casing and having lateral seal surfaces aligned perpendicular to said flow axis;

a seal ring disposed within said annular groove and having a seal surface facing said lateral seal surfaces of said slide plate, wherein said seal ring is axially movable with respect to the annular groove therein disposed and has an annularly surrounding wedge surface facing away from said seal surface;

a spring disposed within said annular groove accommodating said axially movable seal ring, said spring for resiliently pre-stressing said at least one axially movable seal ring; and

an annular wedge interposed between said spring and said axially movable seal ring and defining a wedge surface corresponding to said wedge surface of said seal ring, wherein said spring and said annular wedge cooperate to resiliently pre-stress said axially movable seal ring thereby urging contact between the annular seal surface thereon and at least one lateral seal surface of said slide plate, and further wherein said spring cooperates with said annularly surrounding wedge surface to urge said annular wedge in a radial direction into contact with said surface of said annular groove, forming a seal therebetween.

2. A valve according to claim 1 wherein said annular wedge is composed of a resiliently deformable, heat resistant and slidable material.

3. A valve according to claim 1 wherein said annular wedge is composed of graphite.