US 12,427,590 B1Granted

Bolt cutter with triple compound leverage

OwnerPaul Jansoninventor

Life of this patent

Estimating the term…

Abstract

Systems, devices, and methods for providing hand tool bolt cutters and methods having triple compound leverage, in order to easily cut through bolts, rebar, steel rods, and cables sized up to, 5/16″, ⅜″ in diameter, grade 5 and higher with ease, while holding the bolt cutter in both hands at chest level. The triple compound leverage bolt cutter provides at least approximately 50% more leverage over existing single compound bolt cutters.

Claims10

Dependent claims

A compound leverage bolt cutter, comprising:

a first jaw member with an upper side cutting edge;
a second jaw member with an upper side cutting edge, wherein the side cutting edge of the first jaw member faces the side cutting edge of the second jaw;
a pair of plates which attach the first jaw member to the second jaw member together for allowing the upper side cutting edge of the first jaw member to pivot toward and away from the upper side cutting edge of the second jaw member;
a first bracket having an upper end pivotally attached to a base of the first jaw member, and having an inwardly side protruding tab;
a second bracket having an upper end pivotally attached to a base of the second jaw member, and having an inwardly side protruding tab, wherein the inwardly protruding tab of the first bracket is pivotally attached to the inwardly protruding tab of the second bracket;
a first gear set pivotally attached to a base of the first bracket, the first gear set including a first plate having a cam surface portion with rounded teeth, that is pivotally attached to a first elongated gear plate;
a second gear set pivotally attached to a base of the second bracket, the second gear set including a second plate having a cam surface portion with rounded teeth that mateably intermesh with the rounded teeth on the cam surface of the first gear plate, the second plate pivotally attached to a second elongated gear plate;
a first elongated arm with a first handle attached to the first elongated gear plate;
and
a second elongated arm with a second handle attached to the second elongated gear plate, wherein a combination of the pivotally attached first and second brackets, with pivotal connections on the first gear set and the second gear set together create compound leverage pivoting combinations, wherein holding the first handle and the second handle at chest level increase leverage of the jaw members with respective cutting edges to cut through metal bolts, rebar, steel rods, and cables by the compound leverage pivoting combinations.

7 more elements

Dependencies are inferred from the claim text.

patentgrep

Loading patent…

Abstract

A compound leverage bolt cutter, comprising:

a first jaw member with an upper side cutting edge;
a second jaw member with an upper side cutting edge, wherein the side cutting edge of the first jaw member faces the side cutting edge of the second jaw;
a pair of plates which attach the first jaw member to the second jaw member together for allowing the upper side cutting edge of the first jaw member to pivot toward and away from the upper side cutting edge of the second jaw member;
a first bracket having an upper end pivotally attached to a base of the first jaw member, and having an inwardly side protruding tab;
a second bracket having an upper end pivotally attached to a base of the second jaw member, and having an inwardly side protruding tab, wherein the inwardly protruding tab of the first bracket is pivotally attached to the inwardly protruding tab of the second bracket;
a first gear set pivotally attached to a base of the first bracket, the first gear set including a first plate having a cam surface portion with rounded teeth, that is pivotally attached to a first elongated gear plate;
a second gear set pivotally attached to a base of the second bracket, the second gear set including a second plate having a cam surface portion with rounded teeth that mateably intermesh with the rounded teeth on the cam surface of the first gear plate, the second plate pivotally attached to a second elongated gear plate;
a first elongated arm with a first handle attached to the first elongated gear plate;
and
a second elongated arm with a second handle attached to the second elongated gear plate, wherein a combination of the pivotally attached first and second brackets, with pivotal connections on the first gear set and the second gear set together create compound leverage pivoting combinations, wherein holding the first handle and the second handle at chest level increase leverage of the jaw members with respective cutting edges to cut through metal bolts, rebar, steel rods, and cables by the compound leverage pivoting combinations.

7 more elements