Self-compensation gasket for grooved end pipe couplings
AssigneeInternational Telephone and Telegraph Corporation
InventorJames Blakeley
Life of this patent
Estimating the term…
Abstract
A self-compensation gasket for grooved end pipe couplings for use in sealing the joint between the pipe ends. An "immediate" seal at the pipe end gap serves as a barrier to possible entry of solids into the internal working section of the gasket. Compression pads on the outside diameter of the gasket concentrate the loading of the gasket in a localized manner such that a high compression loading may be insured.
Claims7
An extruded strip of resilient gasket material for forming of annular gaskets of the type designed for enclosure in a coupling housing in coupling of groove end pipe, said strip having a cross section which comprises:
- two base portions,
- two side portions, each having an outside and an inside face,
- two compression pads, two resilient arms, each having a top, a bottom and an end face, said arms connected one to each of said respective base portions and extending therebetween,
- a tongue portion having a top and a bottom face,
- two lip portions, each having a top and a bottom face,
- said side portions extending downward each from a respective one of said base portions,
- each compression pad extending upward from a respective one of said base portions,
- said tongue portion extending between said base portions below said resilient arms,
- said tongue portion having a curved shape such that its middle portion is lower than its end portions,
- each lip portion extending inward from a respective one of said side portions,
- said top face of said tongue portion and said bottom faces of said resilient arms defining a compensation well,
- said bottom face of said tongue portion, said top face of each lip portion and the inside face of the respective said portion respectively defining two cavities,
- said lips' bottom faces having a smooth texture for efficient sealing against a pipes' external surface,
- said tongue's bottom face having a smooth texture for efficient sealing against a pipe's external surface,
- said tongue portion having a substantial degree of flexibility.
An extruded strip of resilient gasket material for forming of annular gaskets of the type designed for enclosure in a coupling housing in coupling of groove end pipes, said strip having a cross section comprising:
- lip means for preventing fluid flow along the pipes' exterior;
- tongue means for preventing fluid flow from between the ends of said groove end pipe;
- means defining a compensating well for permitting reasonable freedom of movement of said pipes without damaging said gasket,
- compression pad means for providing compressive loading of said gasket upon securing of said coupling housing about said gasket,
- resilient arm means for maintaining a separation between said compression pad means.
A resilient annular gasket of the type designed for enclosure in a coupling housing in coupling of groove end pipe comprising:
- lip means for preventing fluid flow from between the ends of said pipe,
- tongue means for preventing fluid flow from between the ends of said pipe,
- a compensating well in said gasket to permit gasket flexing and to improve gasket life, said compensating well defined by side portion means, resilient arm means and a back surface of said tongue means.
Dependencies are inferred from the claim text.