Sealed axially displaceable slip joint

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Having lubricating means – For coupling having torque transmitted via intermeshing teeth

Reexamination Certificate

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Details

C464S133000, C464S162000, C277S565000

Reexamination Certificate

active

06863613

ABSTRACT:
A slip joint includes first and second shafts that are connected for concurrent rotational movement and for relative axial movement, such as by respective pluralities of axially extending spline. A seal can is secured to the first shaft and extends about a portion of the second shaft. A seal assembly is secured to the second shaft and engages a portion of the seal can. The seal assembly includes first and second seals that are each generally concave in shape. Each of the first and second seals is generally V-shaped in cross section, having a radially innermost end, an intermediate portion, and a radially outermost end, wherein the radially innermost and outermost ends are located closer to one another than the radially intermediate portions. the first and second seals are axially spaced apart from one another so as to define an annular space therebetween that can be filled with a sealing material, such as a waterproof grease. The first and second seals can be secured to a backing member that is secured to the second shaft.

REFERENCES:
patent: 2867482 (1959-01-01), Schmidt
patent: 3123990 (1964-03-01), Freeman
patent: 3248900 (1966-05-01), Shurts
patent: 3349973 (1967-10-01), Smith
patent: 3548721 (1970-12-01), Eisennegger
patent: 3942336 (1976-03-01), Schultenkamper
patent: 4094512 (1978-06-01), Back
patent: 4427201 (1984-01-01), Belsanti
patent: 4592556 (1986-06-01), Nieman et al.
patent: 5230658 (1993-07-01), Burton
patent: 5421591 (1995-06-01), Katzensteiner
patent: 5655968 (1997-08-01), Burton
patent: 5853177 (1998-12-01), Brissette et al.

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