A unitary, integrally casted dual C-clamp structure is automatically adjusted by the workpiece during the clamping operation and is formed with clearance areas to facilitate the clamping of an irregularly shaped workpiece. The clamp has a common base. A pair of substantially parallel, spaced-apart s
A unitary, integrally casted dual C-clamp structure is automatically adjusted by the workpiece during the clamping operation and is formed with clearance areas to facilitate the clamping of an irregularly shaped workpiece. The clamp has a common base. A pair of substantially parallel, spaced-apart supports are formed integrally with the base. Positioned on each support is a respective freely-rotatable, prismatically-shaped clamping block. The clamping blocks are spaced from one another. A slot is formed in the base below and between the clamping blocks.
대표청구항▼
A unitary integrally casted dual C-clamp structure, comprising, in combination, a common base having forward and rearward ends, said base having a slot formed therein, facilitating mounting the base on a support, a first pair of substantially-parallel supports formed integrally with the forward end
A unitary integrally casted dual C-clamp structure, comprising, in combination, a common base having forward and rearward ends, said base having a slot formed therein, facilitating mounting the base on a support, a first pair of substantially-parallel supports formed integrally with the forward end of the base transversely thereof, each of the supports being non-movable relative to one another and having a threaded hole formed therein along an axis substantially transverse thereto, a threaded rod in each hole, the rods having respective longitudinal axes and extending substantially parallel to each other and to the slot of the base, the rods having respective forward and rearward end portions, the forward end portion of each rod extending forwardly beyond the respective upstanding support, a crank handle pivotably carried by the extending forward end portion of each rod, said handle being pivotable a full 180 degrees, a clamping element carried by the rearward end of each rod, a second pair of substantially-parallel spaced-apart upwardly extending supports formed integrally with the rearward end of the base transversely thereof, each of said supports terminating below the longitudinal axes of the threaded rods, each second support having a respective end portion defining a respective shoulder thereon, each respective end portion provided with a shaft thereon, each of the shafts having a respective longitudinal axis extending substantially parallel to the other respective longitudinal axis and perpendicular to the longitudinal axes of the threaded rods, a freely rotatable prismatically-shaped clamping block carried on each respective shaft end abutting and being supported by the shoulder of each respective second support, each clamping block being substantially uniformly polygonal in cross-section and having a plurality of faces, and each of the faces of the clamping blocks being provided with grooves formed thereon, the grooves of each face being substantially parallel to one another and further being substantially perpendicular to the grooves of the faces immediately adjacent thereto, each clamping block being spaced from the other and each being freely rotatable on its respective second support independently of one another and may be automatically angularly adjusted by a workpiece being clamped relative to its respective second support about an axis substantially perpendicular to the longitudinal axis of its respective threaded rod, thereby facilitating the clamping of an irregularly-shaped workpiece in the C-clamp structure, wherein each clamping block is rotatably retained on one of said shafts by a retaining means which permits free rotation of the clamp block by the workpiece.
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Aderneck Stephen E. (Box 188 Quathiaski Cove ; B.C. CAX V0P-1N0), Portable chainsaw milling guide attachment.
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