Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1988-05-09
1990-05-15
Watson, Robert C.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
269221, 269225, 269249, 74 8915, 744248R, B25B 102
Patent
active
049251694
ABSTRACT:
The clamp includes a member having an anvil at one end and a threaded bore at another end with a longitudinal bore axis directed at the anvil. A rod having a threads and a longitudinal splines is threadingly disposed within the threaded bore. The rod has a first end, preferably with a handle, and a second end, preferably with a shoe, facing the anvil. A gear matingly engageable with the splines on the rod is rotatably held to the member by a fastener through a central bore. The gear intertwines with the splines on the rod, such that movement of the gear in one direction rotates the rod in an to threadingly move the rod through the bore along the longitudinal axis of the rod. A second embodiment of the clamp includes a member having an anvil at one end and a bore at another end with a longitudinal bore axis directed at the anvil. A rod having a plurality of threads and a pair of longitudinally extending, generally smooth surfaces is disposed within the bore. The rod has a first end, preferably with a handle, and a second end, preferably with a shoe, facing the anvil. A driving member with a threaded bore threadingly engages the threads on the rod. The threaded driving member is retained adjacent to the bore of the member and a pair of walls slidingly engage the pair of smooth surfaces on the rod to bias the rod against rotational movement while permitting longitudinal movement of the rod.
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