Pipe joints or couplings – Essential catch – With manipulator
Reexamination Certificate
2006-01-31
2006-01-31
Hewitt, James M. (Department: 3679)
Pipe joints or couplings
Essential catch
With manipulator
C285S307000, C285S322000, C285S374000, C285S403000
Reexamination Certificate
active
06991265
ABSTRACT:
A device for gripping the external wall surface of a pipe or bar. The device includes a tubular body having at least one end open for insertion of a pipe or bar, and a cage with balls or rollers cooperating with a first tapered internal wall part of the body. A resilient mechanism pushes the cage in an axial direction to cause the balls or rollers to grip the external wall of an inserted pipe or bar. The device also has a compressible member located within the body and cooperating with a second tapered inner wall part of the body and movable relative thereto when increased fluid pressure is present within the body. Under increased pressure it also grips the external wall of the inserted pipe or bar.
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patent: 3-140696 (1991-06-01), None
Emmett Robert
Walmsley Owen
BSW Limited
Gauthier & Connors LLP
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