Polish rod clamp apparatus

Details Polish rod clamp apparatus Polish rod clamp apparatus

2007-05-10

2010-02-09

Gay, Jennifer H (Department: 3676)

Wells

Above ground apparatus

Suspension means

C166S093100, C166S241200

Reexamination Certificate

active

07658225

ABSTRACT:
A polish rod clamp apparatus has a body defining a lower rod aperture and a tapered body recess. A cap defines an upper rod aperture and a tapered cap recess. Tapered gripper dies have upper and lower outer surfaces sloping inward from a central portion and inner surfaces configured to bear against the polish rod. The dies are installed in the body recess such that inner surfaces bear against a polish rod and the lower outer surfaces bear against walls of the body recess. The dies are movable with respect to the body and are prevented from rotating. The cap is threaded onto the body such that the upper outer surfaces of the gripper dies bear against the walls of the tapered cap recess. Threading the cap onto the body forces the gripper dies against the outer surface of the polish rod passing through the body.

REFERENCES:
patent: 1117241 (1914-11-01), Procunier
patent: 2137853 (1938-11-01), Nixon
patent: 2173355 (1939-09-01), Criswell
patent: 3083025 (1963-03-01), Herbkersman
patent: 3475798 (1969-11-01), Crickmer
patent: 3987846 (1976-10-01), Thompson
patent: 4372379 (1983-02-01), Kulhanek et al.
patent: 4716961 (1988-01-01), Makins, Jr. et al.
patent: 6241016 (2001-06-01), Dedels
patent: 6457958 (2002-10-01), Dunn
Page from J. M. Huber Corporation showing No-bolt Polished Rod Clamp.

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