Clamping claw having friction delaying movement, and hydraulic spike extrating means having sealed front part external shape

Application Number: 00105323
Application Date: 2000.03.31
Publication Number: 1268601
Publication Date: 2000.10.04
Priority Information: 1999/3/31 US 09/283,270; 1999/6/22 US 09/338,417; 1999/6/22 US 09/338,448
International: E01B29/26
Applicant(s) Name: Framatome Connector International
Inventor(s) Name: John D. Lyfawall;Lemond G. Lawajel
Patent Agency Code: 11038
Patent Agent: sun zheng
Abstract A hydraulic spike puller comprising a frame with a chute, a hydraulic drive section connected to the frame, and a spike contacting section connected to the hydraulic drive section and movably located in the chute. The improvement comprises the spike contacting section comprising two jaws pivotably connected to each other and a friction system extending from the jaws and contacting opposite interior sides of the chute. The jaws each have a spike contacting claw section which, when the jaws are in an open position, have a back surface adjacent an interior side of the chute to block an area between the chute and the back surface. The claw sections have substantially non-curved bottom faces which, when the jaws are in the open position, can push a spike out of the chute. The claw sections are shaped to prevent a spike from being caught between the chute and the back surfaces of the claw sections.