초록 ▼

A clamping device utilizing the mechanism of conventional vise-grip locking pliers comprises an extendable fixed arm and an extendable movable arm, both fitted with threaded holes at one end to attach a wide variety of clamping jaws and accessories. The device is capable of clamping workpieces of va

A clamping device utilizing the mechanism of conventional vise-grip locking pliers comprises an extendable fixed arm and an extendable movable arm, both fitted with threaded holes at one end to attach a wide variety of clamping jaws and accessories. The device is capable of clamping workpieces of various shapes such as rectangular, cylindrical, triangular, and spherical, etc. with adjustable clamping force. It is also capable of clamping workpieces of a broad range of sizes, and capable of clamping a plurality of workpieces at the desired spatial relationship between each other.

대표청구항 ▼

What I claim as my invention is: 1. A multi-purpose locking plier having a fixed handle and a movable handle linked together by a spring and a toggling linkage mechanism similar to the design of a conventional locking plier comprising: a L-shape extendable fixed arm with one end riveted to a first

What I claim as my invention is: 1. A multi-purpose locking plier having a fixed handle and a movable handle linked together by a spring and a toggling linkage mechanism similar to the design of a conventional locking plier comprising: a L-shape extendable fixed arm with one end riveted to a first end of said fixed handle and the other end made to be cylindrical in shape with a first threaded hole; a L-shape extendable movable arm with one end pivoted to one end of said movable handle and the other end made to be cylindrical in shape with a second threaded hole; an adjustment screw fed into a second end of said fixed handle, said adjustment screw having a cylindrical head with a cylindrical hole made perpendicular to its axis; a plurality of clamping heads, each with a unique design feature and a threaded rod being fed into said first threaded hole of said L-shape extendable fixed arm or said second threaded hole of said L-shape extendable movable arm, including: a fixed clamping pad, a swivel clamping pad, a rubber clamping pad, and a yoke assembly; and a plurality of accessories, each with a unique design feature and a hole being attached with screw to said first threaded hole of said L-shape extendable fixed arm or said second threaded hole of said L-shape extendable movable arm, including: a V-pad, a long L-shape link, a short L-shape link, a 180 degree V-angle bracket, a 90 degree V-angle bracket, a 180 degree L-angle bracket, a 90 degree L-angle bracket, a support bar, and a L-shape clamping arm with slip-on jaw. 2. The multi-purpose locking plier according to claim 1, wherein said L-shape extendable fixed arm comprising an upper L-shape metal shank, a first upper straight shank with inverted U-shape cross section, and a second upper straight shank made of solid metal inserted and slidable inside said first upper straight shank; one end of said first upper straight shank being riveted to one end of said upper L-shape metal shank; said second upper straight shank, similar in length as said first upper straight shank being fixed at a plurality of positions with screws and nuts through a plurality of holes on the bodies of both said first upper straight shank and said second upper straight shank. 3. The multi-purpose locking plier according to claim 2, wherein one end of said second upper straight shank is cylindrical in shape with its axis perpendicular to said second upper straight shank and said first threaded hole is made along said axis. 4. The multi-purpose locking plier according to claim 1, wherein said L-shape extendable movable arm comprising a lower L-shape metal shank, a first lower straight shank with U-shape cross section, and a second lower straight shank made of solid metal inserted and slidable inside said first lower straight shank; one end of said first lower straight shank being riveted to one end of said lower L-shape metal shank; said second lower straight shank, similar in length as said first lower straight shank being fixed at a plurality of positions with screws and nuts through a plurality of holes on the bodies of both said first lower straight shank and said second lower straight shank. 5. The multi-purpose locking plier according to claim 4, wherein one end of said second lower straight shank is cylindrical in shape with its axis perpendicular to said second lower straight shank and said second threaded hole is made along said axis. 6. The multi-purpose locking plier according to claim 1, wherein said yoke assembly comprises a horizontal straight metal bar with a vertical threaded hole at each end, a threaded rod with clamping pad being fed through each of said vertical threaded hole, and a short threaded rod hinged at the middle of said horizontal straight metal bar. 7. The multi-purpose locking plier according to claim 1, wherein said V-pad is a U-shape metal base bracket to which two U-shape metal brackets are pivoted at each end to form a swivel V-shape clamping head capable of clamping cylindrical workpieces of various diameters. 8. The multi-purpose locking plier according to claim 1, wherein said long L-shape link is a long L-shape metal bar with a plurality of holes on both legs of said long L-shape link for inserting screw to attach to said first threaded hole of said L-shape extendable fixed arm so that a plurality of multi-purpose locking pliers may be connected in a fixed spatial relationship to clamp workpieces together; said short L-shape link is a short L-shape metal bar with a plurality of holes on both legs of said short L-shape link for inserting screw to attach to said first threaded hole of said L-shape extendable fixed arm so that a plurality of multi-purpose locking pliers may be connected in a fixed spatial relationship to clamp workpieces together. 9. The multi-purpose locking plier according to claim 1, wherein said 180 degree V-angle bracket comprises two sets of V-shape clamping heads welded in-line on a metal bracket with a center hole for inserting screw to attach said 180 degree V-angle bracket to said second threaded hole of said L-shape extendable movable arm; said 90 degree V-angle bracket comprises two sets of V-shape clamping heads welded at 90 degrees on a metal bracket with a center hole for inserting screw to attach said 90 degree V-angle bracket to said second threaded hole of said L-shape extendable movable arm. 10. The multi-purpose locking plier according to claim 1, wherein said 180 degree L-angle bracket comprises two sets of L-shape clamping heads welded in-line on a metal bracket with a center hole for inserting screw to attach said 180 degree L-angle bracket to said second threaded hole of said L-shape extendable movable arm; said 90 degree L-angle bracket comprises two sets of L-shape clamping heads welded at 90 degrees on a metal bracket with a center hole for inserting screw to attach said 90 degree L-angle bracket to said second threaded hole of said L-shape extendable movable arm. 11. The multi-purpose locking plier according to claim 1, wherein said supporting bar is a straight metal bar with a center hole for inserting screw to attach said supporting bar to said second threaded hole of said L-shape extendable movable arm. 12. The multi-purpose locking plier according to claim 1, wherein said L-shape clamping arm is a L-shape metal shank with round tip at one end, a locating ear at the other end, an upper mounting plate and a lower mounting plate at the middle portion; both said upper mounting plate and said lower mounting plate having an elongated hole in the middle respectively enable the mounting of said L-shape clamping arm onto said second upper straight shank or said second lower straight shank with screw to further extend the effective length of said L-shape extendable fixed arm or said L-shape extendable movable arm; said round tip end of said L-shape clamping arm is equipped with a pair of steel balls loaded by a compressed helical spring internally and retained in position by a circular ring flange outside each of said steel ball to provide a convenient means to add and remove a slip-on jaw; said slip-on jaw comprises a metal clamping plate on which a U-shape metal bracket is welded, two elongated holes being made on both sides of said U-shape metal bracket, one hole on each side, to hold said slip-on jaw in place by said steel balls when said U-shape metal bracket is slipped on said round tip end of said L-shape clamping arm.