High pressure coupling apparatus

• US 4,311,248 A
• Filed: 12/29/1980
• Issued: 01/19/1982
• Est. Priority Date: 11/04/1974
• Status: Expired due to Term

• Current Assignee: Construction Forms, Inc. (Edison Control Corporation)
• Original Assignee: Construction Forms, Inc. (Edison Control Corporation)
• Inventors: Westerlund, Robert E., Westerlund, Herbert A.
• Primary Examiner(s): Footland, Lenard A.
• Application Number:
  US06/220,817
• Time in Patent Office: 386 Days
• Field of Search: 277/207 A, 277/208, 277/207 R, 277/215, 277/206 R, 285/112, 285/365
• US Class Current: 277/626
• CPC Class Codes: F16L 23/06 connected by toggle-action levers quick acting couplings tightened by toggle-action levers F16L37/20
• CPC Class Codes: F16L 33/12 with a pivoted or swinging tightening or securing member, e.g. toggle lever

Abstract

Concrete pumping conduits are connected by releasable hinged couplers. The ends of the conduits include metal pipes formed with annular grooves including a circular peripheral base. The coupler has a cup-shaped cross-section and a sealing gasket is located within the base of the cup-shaped recess with a tongue-like ridge projecting between the two end faces of the pipe ends. The tongue is formed with a rectangular or triangular cross-section. The gasket is provided with small recesses adjacent the ridge with inclined outer sidewalls defining lips in sealing engagement with the conduit. The peripheral ends of the pipes are chamfered and engaged by the sealing lips.

Claims

1. A coupling gasket member adapted to be located within a cavity of a pipe end coupler for connecting aligned pipe members carrying a pressurized fluid medium, comprising a base ring portion formed of solid flexible material and having a centrally located and integrally connected inner projecting member adapted to extend between said pipe members with said ring portion overlying the pipe members, said ring portion having an inner peripheral wall including a pair of small annular recesses one to each side of the projecting member, said projecting member extending outwardly from the inner peripheral wall and of said recesses, each of said recesses having a width at the peripheral wall on the order of the maximum width of the projecting member at the inner peripheral wall and a depth less than said width of said projecting member and substantially less than one half the depth of the ring portion and being located immediately adjacent to the projecting member, the axially outer sidewalls of the recesses being slightly inclined along substantially the total depth of the recesses to define a sealing lip at the inner peripheral wall surface deflected inwardly by the pipe member into a sealing position and maintaining said sealing lip spaced from said inner projecting member in the deflected sealing position by substantially the width of the recess with the lip deflected inwardly, said projecting member extending substantially beyond said peripheral wall in the non-sealing position and in the sealing position of the gasket.

2. The coupling gasket member of claim 1 wherein said inner peripheral wall surface inclines radially inward toward the center of the ring portion with the lip spaced from said projecting member.

3. The coupling gasket member of claim 1 wherein said recesses have an essentially rectangular cross-section of width greater than the depth in the unstressed state of the member and in the sealing position of the member.

4. The coupling gasket member of claim 3 wherein the projecting member extends radially inwardly of the inner peripheral wall.

5. The coupling gasket member of claim 1 wherein said recesses have an essentially rectangular cross-section in the unstressed state of the member and in the sealing position of the member, the projecting member extends radially inwardly of the inner peripheral wall and said inner peripheral wall surface being inclined radially toward the center of the ring portion with the lip spaced from said projecting member.

6. The coupling gasket member of claim 1 wherein said projecting member is a triangular shaped member symmetrical about a center plane through the base ring portion with the width at the plane of the periphery wall being on the order of the width of the recess.

7. An annular coupling gasket member adapted to be located within an annular cavity of a pipe end coupler for connecting of a pair of pipe sections end-to-end to seal the junction against a pressurized fluid medium in said pipe sections, comprising a heavy ring base portion of a solid flexible material with a centrally located inner projecting member extending substantially inwardly of an inner peripheral wall and adapted to be located between the ends of said pipe sections, said inner peripheral wall having a pair of small annular recesses one to each side of the projecting member and each having a width at the peripheral wall on the order of the width of the projecting member and having a depth less than said width of the projecting member at the peripheral wall and substantially less than one half the depth of the base portion and being located immediately adjacent to the projecting member, the axially outer sidewalls of the recesses being slightly inclined along substantially the total depth of the recesses to define a sealing lip at the inner peripheral wall surface, said sealing lip being deflected inwardly from an unstressed state and said recesses being subjected to the fluid pressure within the pipe sections, said base portion being substantially deeper than said recesses and maintaining said sealing lip spaced from said inner projecting member by substantially the width of the recess at the peripheral wall in both the unstressed state and in the sealing position.

8. The coupling gasket member of claim 7 wherein said projecting member has a triangular cross-section.

9. The coupling gasket member of claim 7 wherein said projecting member has a triangular cross-section having sidewalls parallel to said outer sidewalls of the said recesses.

10. The coupling gasket member of claim 7 wherein said inner peripheral wall surfaces are totally inclined radially inward toward the projecting member with the lip spaced from said projecting member by more than one-half the width of the base of the recess.