Tricam axial extension to provide gripping tool with...

Details Tricam axial extension to provide gripping tool with... Tricam axial extension to provide gripping tool with...

E - Fixed Constructions

21

B

E21B 19/06 (2006.01) E21B 19/07 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2730562

An improvement in a gripping tool having a grip surface carried by movable grip elements and cam linkages to radially move the grip surface from a retracted to an extended position. The improvement involves a tri-cam linkage with cam pairs supporting bi-rotary to axial stroke activation and further cam linkages to cause radial stroke of the tool grip surface as a function of axial stroke.

L'invention porte sur une amélioration d'un outil de saisie comportant une surface de saisie portée par des éléments mobiles de saisie et des liaisons à cames destinées à déplacer radialement la surface de saisie d'une position rétractée à une position déployée. L'amélioration comprend une liaison à trois cames avec des paires de cames assurant un actionnement allant d'une course birotative à axiale, et d'autres liaisons à cames destinées à produire une course radiale de la surface de saisie d'outil en fonction d'une course axiale.

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