Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for a pipe – conduit – or cable
Reexamination Certificate
1998-04-30
2001-07-17
Sandy, Robert J. (Department: 3626)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for a pipe, conduit, or cable
C277S607000, C285S351000, C285S918000
Reexamination Certificate
active
06260851
ABSTRACT:
The present invention relates to a composite gasket designed to be slipped frictionally onto a rigid pipe connector capable of being inserted into a component provided with an orifice for connection to the connector, the gasket comprising at least one collar made from elastomeric material.
It also relates to a component/pipe assembly comprising such a gasket.
It has a particularly important, albeit not exclusive, use in the field of the couplings of cooling circuits, air conditioning circuits and/or power steering systems of automobiles.
Such a coupling may be, for example, of the removable and/or snap-fastenable type.
Gaskets of leaktight couplings and/or of removable couplings between a tube end and a mechanical component are already known.
However, known gaskets have disadvantages, since they do not always ensure good leaktightness.
In fact, the prior art teaches essentially O-ring gaskets inserted in grooves of the tubular connector, the outside diameter of which does not always make it possible to insert them without play into the connecting orifice, in view of the tolerance dimensions for machining the components.
The object of the present invention is to provide a gasket which satisfies practical requirements better than those previously known, in particular in that it allows simple assembly which is easy to carry out and which does not entail any risk of damage to the gasket by the fitter, and in that it ensures an optimized connection between the connector and the orifice, along with much better dimensional tolerance than that obtained in the prior art, thus making it possible to ensure better leaktightness of the coupling.
To achieve this object, the present invention provides, in particular, a composite gasket designed to be slipped frictionally onto a rigid pipe connector capable of being inserted into a component provided with an orifice in the form of a cylindrical bore for connection to said connector, said gasket comprising at least one collar made from elastomeric material, characterized in that it comprises, furthermore, at least one ring made from rigid material, in the form of a cylindrical sleeve located in the extension of the collar parallel to and with an axis coinciding with the axis of the collar, said ring having an outer surface capable of cooperating by soft friction with the inner face of the connecting orifice, the junction end of the ring with the collar having a shape complementary to that of the collar so as to match at least partially the shape of the edge of said collar.
Advantageous embodiments make use, moreover, of either or both of the following arrangements:
the ring has an inner surface capable of cooperating by soft friction with the outer face of the connector;
the ring is integral with the collar made from elastomeric material;
the gasket comprises two collars made from elastomeric material, located respectively on either side of the ring;
the gasket comprises two rings made from rigid material;
the rings are connected to one another by means of one of said collars made from elastomeric material, with which said rings are integral, at least one of said rings comprising at its other end the other gasket made from elastomeric material;
the collar or collars are O-rings;
the collar is made from elastomeric material in the form of an elongate
8
;
the collar comprises an end part in the form of portions of a cylinder which are arranged angularly about the axis of the gasket and which cooperate with the inner face of the ring.
The invention also provides a component/pipe assembly comprising a composite gasket of the type described above.
It also provides a component/pipe assembly with a composite gasket of the type described above, characterized in that the rigid pipe connector comprises a first part projecting relative to the outer face of the pipe, said first part being located at a distance from the end of the pipe, and a second projecting part located at the end of said pipe, said projecting parts forming longitudinal blocking stops on either side of the gasket on the pipe connector.
Advantageously, there is longitudinal play allowing the gasket (forming a sleeve) to slide longitudinally slightly relative to the pipe between the two blocking stops.
Sliding completes and optimizes the compressive force of the gaskets in proportion to the pressure exerted.
The invention also provides a component/pipe assembly comprising a composite gasket, as described above, characterized in that the connector comprises at least one annular groove, into which the collar made from elastomeric material is inserted at least partially.
The present invention will be understood better from a reading of the following description of particular embodiments given by way of nonlimiting examples.
REFERENCES:
patent: 3061321 (1962-10-01), Smith
patent: 3325174 (1967-06-01), Weaver
patent: 3834744 (1974-09-01), Masatchi
patent: 4799512 (1989-01-01), Sarson
patent: 4915136 (1990-04-01), Bartholomew
patent: 5171028 (1992-12-01), Bartholomew
patent: 5338073 (1994-08-01), Washizu et al.
patent: 5378024 (1995-01-01), Kumagai et al.
patent: 5423577 (1995-06-01), Ketcham
patent: 5609370 (1997-03-01), Szabo et al.
patent: 5716051 (1998-02-01), Cornea et al.
Larson & Taylor PLC
Manuli Auto France
Sandy Robert J.
Schwing Karlena D.
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