Anti-blowout seal

• US 4,614,348 A
• Filed: 10/04/1985
• Issued: 09/30/1986
• Est. Priority Date: 10/04/1985
• Status: Expired due to Term

• Current Assignee: Aeroquip Corporation (Eaton Corporation PLC.)
• Original Assignee: Aeroquip Corporation (Eaton Corporation PLC.)
• Inventors: Fournier, Paul J. E.
• Primary Examiner(s): Ward, Robert S.
• Application Number:
  US06/784,557
• Time in Patent Office: 361 Days
• Field of Search: 277/165, 277/173, 277/174, 277/176, 277/177, 277/188 R, 277/188 A, 277/205, 277/206 R
• US Class Current: 277/625
• CPC Class Codes: F16J 15/166 with means to prevent the extrusion of the packing
• CPC Class Codes: F16L 37/23 by means of balls
• CPC Class Codes: F16L 37/35 at least one of the valves having an axial bore
• CPC Class Codes: Y10S 277/91 O-ring seal

Abstract

An annular fluid seal for pressurized fluid systems particularly for use with a coupling having interconnectable self-sealing male and female parts. The two-part seal is mounted within an annular gland recess within the male part and includes a relatively rigid primary annular body of synthetic plastic material having an interference fit with the male coupling part poppet valve. The outer diameter of the seal body includes an annular recess receiving an elastomeric O-ring, and the mass of the primary seal body provides maximum strength within the confines of the gland recess to resist deformation due to pressurized fluid to prevent blowout of the seal from its recess.

Claims

1. A seal for pressurized fluid systems adapted to establish a seal between a first cylindrical member received within a second member having a cylindrical opening, the second member having an annular concentric recess intersecting said opening wherein the seal is located within the annular recess, the recess being defined by radial sides and a base surface, the seal being characterized by its resistance to being blown out of the recess by pressurized fluid comprising, in combination, an annular body of semi-rigid synthetic plastic material having an inner cylindrical bore sealingly engageable with the first cylindrical member and having an axis, axially spaced radially extending sides spaced apart a distance slightly less than that separating the recess sides, and an outer circular circumference radially spaced from said bore a distance slightly less than the radial depth of the recess whereby said body substantially fills the second member recess and the recess confines said body from significant radial and axial movement therein, an annular ring recess defined in said body outer circumference intermediate said body sides and concentric to said body axis, said ring recess being defined by radially extending sides intersecting said body circumference and a bottom surface, the radial dimension of said body from said inner bore to said ring recess bottom surface being at least as great as the radial depth of said ring recess from said body outer circumference to said ring recess bottom surface, and an annular elastomeric seal ring within said ring recess having a radial cross-sectional dimension greater than the radial depth of said ring recess whereby said seal ring engages the recess base surface and said body bore sealingly receives the first cylindrical member.

2. In a seal for pressurized fluid systems as in claim 1, said elastomeric seal ring comprising an O-ring.

3. In a seal for pressurized fluid systems as in claim 1, said ring recess being centrally defined between said body radially extending sides.

4. In a seal for pressurized fluid systems as in claim 1, said elastomeric seal ring comprising an O-ring and said ring recess sides comprising concave surfaces tangentially intersecting said ring recess bottom surface.

5. In a seal for pressurized fluid systems as in claim 1, said ring recess being centrally defined between said body radially extending sides and the axial dimension of said body between a ring recess side and the nearest body radially extending side being approximately equal the radial dimension of said body from said inner bore to said ring recess bottom surface.

6. In a seal for pressurized fluid systems as in claim 1, said body being formed of polytetrafluoroethylene.