Tools – Tool jaw – Resiliently urged
Reexamination Certificate
1999-08-13
2001-03-20
Scherbel, David A. (Department: 3723)
Tools
Tool jaw
Resiliently urged
C081S418000
Reexamination Certificate
active
06202517
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to pliers and more specifically to variously shaped hand tools having pivoting jaws which are designed to hold, bend, twist or cut, such as, pliers, linesman pliers, wire cutters, and needle nose pliers, hereinafter referred to as pliers. The pliers have specially designed handles having an outwardly projecting recessed curve below the pivot point having oppositely opposed studs at the trough of the recessed curve projecting inwardly whereupon is mounted a coiled spring, held on by nubs located on studs, being of such a compressed state as to cause the handle members, under a no load condition, to naturally pivot to a fully open position. Further situated at the apex of the curved recesses are oppositely opposed inwardly projecting tongue-like members. The first tongue-like member has a notch and the second tongue-like member has an aperture having a rivet passing therethrough having a wire member wrapped around each end of the rivet forming an inwardly projecting rotating loop for engaging the notch of the first tongue-like member thereby providing means closure retention means for said spring tensioned handles. In operation of said pliers the notch is formed in such a manner that by lightly compressing the handles together and at the same time with your thumb manually pulling down the wire loop causing it to disengage from the notch thereby forming self-opening pliers. The pliers closure means is engaged by compressing the handles until the loop wire member can be manually rotated to engage the notch of the first-tongue-like member.
In addition said pliers can have a solid leverage spanner fixedly attached or molded into one jaw providing leverage means for the removal of nails and staples Further said pliers can have a hammer-like claw formed at the distal end of said handle providing means for using the pliers as a pry bar. The handles are also covered by an electrically non-conductive material, which also assists in gripping the tool.
2. Description of the Prior Art
There are other plier combination tool devices designed for multipurpose use. Typical of these is U.S. Pat. No. 5,546,661 issued to Yang on Aug. 20, 1996.
Another patent was issued to House, on Sep. 4, 1894 as U.S. Pat. No. 525,460. Yet another U.S. Pat. No. 5,327,602 was issued to Stenger on Jul. 12, 1994 and still yet another was issued on Jan. 25, 1994 to Park as U.S. Pat. No. 5,280,659.
Another patent was issued to Simpson on Nov. 19, 1996 as U.S. Pat. No. 5,575,029.
U.S. Pat. No. 5,546,661
Inventor: Chen-Jeng Yang
Issued: Aug. 20, 1996
A pair of shears has a fixed blade, a fixed handle connecting the fixed blade, and a driving handle connecting the driving blade, a spring between two handles, a pin on the crisscross portion between two blades, and a switch button on the outer side of the fixed handle. The first threaded hole and the first positioning post are formed on the front of the blade. The second threaded hole and the second positioning post are formed on the inner side of the fixed handle. A cutting device such as a saw blade and a sickle is disposed in front of the fixed blade. A through hole and a positioning hole are formed on the rear of the cutting device. The first positioning post inserts in the positioning hole. A screw passes through the through hole and the first threaded hole to fasten the cutting device.
U.S. Pat. No. 525,460
Inventor: James A. House
Issued: Sep. 4, 1894
A new and useful combined belt-punch, belt-cutter, and pliers, of which the following is a specification. A combination tool in which a round-belt cutter, and punch are combined with pliers-jaws by which the tool is particularly adapted to be used in connection with sewing machines, and other apparatus in which round or cord-belts are used and which as they become stretched from use, have to be disconnected at their ends, a piece cut off, and then punched for reconnection.
U.S. Pat. No. 5,327,602
Inventor: Tracy K. Stenger
Issued: Jul. 12, 1994
A spanner wrench is clamped to one component of a conventional pair of pliers and is prevented from turning relative to that component by the same pivot element which pivotably connects the two plier components to one another
U.S. Pat. No. 5,280,659
Inventor: No K. Park
Issued: Jan. 25, 1994
A multipurpose tool comprising a pair of movable members which are hinged together and includes four working stations each of which has a pair of working edges. The pair of working edges has different working function. The multipurpose tool of the present disclosure is composed of a material of good wear resistance, toughness and hardness and has a disadvantage in that all of the manual works, for example, stripping of an electric wire, cutting of wire, preventing the rotation of pipes, pounding, scissoring of a thin metal plate, loosening or tightening of screws and nuts, can be done only by the multipurpose tool of the present invention.
U.S. Pat. No. 5,575,029
Inventor: Dave Simpson
Issued: Nov. 19, 1996
A combination hand tool comprising a first and second pivoting pin. The single combination hand tool comprises means for performing multiple functions. The combination hand tool comprises a hammer head and claw, a first set of plier gripper jaws, a wire stripper and a pipe reamer.
While these multipurpose plier tools may be suitable for the purposes for which they were designed, they would not be as suitable for the purposes of the present invention. The pliers changes were purposely designed to do the best job in situations, as hereinafter described. In applications where repetitive opening and closing is required, (as in a cutting situation) it is extremely convenient that these tools self open. The design of the handles in general, makes gripping more comfortable, or in fact are ergonomically designed.
SUMMARY OF THE PRESENT INVENTION
The present invention discloses a spring system and a latch system for either maintaining various types of pliers in an open position or a closed position. The spring system operates by having a spring disposed on a pair of studs located in the trough of an outwardly curved portion of the handles. The latch system comprises a pair of tongue-like members and a wire loop member which hooks onto a notch in one of the tongue-like members. The spring system normally maintains the pliers in an open position when no load is applied to handles.
A primary object of the present invention is to provide a self opening pliers that open by a unique handle, latch and spring system with variations in size and style.
Another object of the present invention is to provide a self opening pliers having specially designed handles having an outwardly projecting recessed curve below the pivot point having oppositely opposed studs at the trough of the recessed curve projecting inwardly whereupon is mounted a coiled spring, which is held on by nubs on the studs, being of such a compressed state as to cause the handle members, under a no load condition, to naturally pivot to a fully open position.
Yet another object of the present invention is to provide a self opening pliers having tongue-like members situated at the apex of the handles curved recess which are oppositely opposed and inwardly projecting having a notch in one member and a rotative rivet in the other having a wire member wrapped around each end of the rivet forming an inwardly projecting rotating loop for engaging the notch of the first tongue-like member thereby providing closure means for the spring tensioned handles.
Still yet another object of the present invention is to provide a self opening pliers which open by lightly compressing the handles together and at the same time with your thumb disengaging the wire loop member from the notched member.
Another object of the present invention is to provide a self opening pliers having a hammer-like claw formed at the distal end of said handle providing means for using the pliers as a pry bar.
Yet another object of the present invention is to provide a self opening pliers havi
Kroll Michael I
Ojini Anthony
Scherbel David A.
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