Title: Oil well swab cup

Abstract: An oil well swab cup with improved wear characteristics utilizes a single integral reinforcing structure featuring a wear surface forming a substantial portion of the external surface of the cup.

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Inventors: Lane, John Jay (Dallas, TX, US)

Application Number: 708238
Filing Date: 1976-07-23
Publication_date: 1978-03-28
Assignee: Dresser Industries, Inc. (Dallas, TX)
Primary Class(es): 277/335 92/241, 92/254, 277/341, 277/343
Other Classes:
US Patent Ref:

1601720	Oct, 1926	Christenson	92/241.
2305282	Dec, 1942	Taylor et al.	277/235.
2352812	Jul, 1944	Taylor	92/241.
2438992	Apr, 1948	Childers	277/212.
2619393	Nov, 1952	Wilson et al.	92/241.
2723721	Nov, 1955	Corsette	277/212.
2887347	May, 1959	Losey	92/241.
3081136	Mar, 1963	Waldrop	92/241.
3417673	Dec, 1968	Bowerman	277/212.
3450412	Jun, 1969	Collett	277/212.
3722053	Mar, 1973	Berry et al.	92/241.

Other Refs:
Primary Examiner: Ward, Jr., Robert S.
Assistant Examiner:
Attorney: Caddell; Michael J., Van Winkle; Roy L.