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US 7,621,052 B1Granted
Bolt cutter
OwnerDavid Scott Kerrinventor
Life of this patent
Estimating the term…
Abstract
A bolt cutter. An illustrative embodiment of the bolt cutter includes a first jaw having a first jaw cutting edge, a second jaw pivotal with respect to the first jaw and having a second jaw cutting edge, a first handle pivotally carried by the first jaw, a second handle pivotally carried by the first handle and the second jaw, a rotatable sprocket carried by a first one of the first handle and the second handle and a roller chain meshing with the sprocket and attached to a second one of the first handle and the second handle.
Claims15
A method of cutting through an object, comprising:
- (a) providing a cutting device, including:
- (i) a first assembly and a second assembly hinged together, both first and second assemblies having a cutting head, defining a cutting edge, and a handle and wherein said hinge is located between said cutting head and said handle for both said first and second assemblies, and wherein said two cutting edges are mutually opposed and can be moved into physical engagement by moving said handles together, said movement of said cutting edges defining a cutting plane;
- (ii) wherein a wheel is rotatably mounted to said handle of said first assembly, and wherein a tension member is engaged to said wheel and is also attached to said handle of said second assembly, so that when said wheel is turned in a first rotational direction, said first handle and said second handle are pulled together by said tension member, thereby bringing said cutting edges together;
- and
- (iii) a bolt rigidly attached to said wheel, so that turning said bolt turns said wheel;
- and
- (b) providing a wrench;
- (c) fitting said wrench to said bolt and turning said wrench in a plane parallel to said cutting plane, thereby turning said bolt in said first rotational direction, thereby turning said wheel in said first rotational direction, thereby pulling said handles together and bringing said cutting edges together.
5 more elements
A cutting device, including:
- a) a first assembly and a second assembly hinged together, both first and second assemblies having a cutting head, defining a cutting edge, and a handle and wherein said hinge is located between said cutting head and said handle for both said first and second assemblies, and wherein said two cutting edges are mutually opposed and can be moved into physical engagement by moving said handles together, said movement of said cutting edges defining a cutting plane;
- b) wherein a wheel assembly is rotatably mounted to said handle of said first assembly, and wherein a tension member is engaged to said wheel assembly and is also attached to said handle of said second assembly, so that when said wheel assembly is turned in a first rotational direction said first handle and said second handle are pulled together by said tension member, thereby bringing said cutting edges together;
- and
- c) a ratchet arm attached to said wheel assembly, so that when said ratchet arm is turned in a plane parallel to said cutting plane and in said first rotational direction it turns said wheel assembly, and when the ratchet arm is turned in the opposite rotational direction it does not turn said wheel assembly, said ratchet arm having a range of rotational freedom that includes positions forming an acute angle between said ratchet arm and said handle of said first assembly.
1 more element
A cutting device, comprising:
- a) a first cutting head and a second cutting head, each cutting head having a distal portion and a proximal end and wherein said distal portion of said first cutting head defines a first cutting edge and said distal portion of said second cutting head defines a second cutting edge opposed to said first cutting edge;
- b) a pair of cutting head links, to which each said cutting head is hinged, so that when said proximal ends of said cutting heads are forced apart, said distal portions are forced together, the movement of said distal portions defining a cutting plane;
- c) a first handle hinged to said proximal end of said first cutting head and a second handle hinged to said proximal end of said second cutting head and also hinged to said first handle, whereby when said handles are forced together, said cutting head proximal ends are forced apart, forcing together said cutting edges;
- d) wherein said first handle is made of two spaced apart members, defining a gap therebetween and wherein a sprocket is mounted between said two spaced apart members and is attached to a bolt that is threaded through a bolt hole in one of said spaced apart members so that the bolt head extends out of the exterior side of said bolt hole, thereby providing an attachment point for a ratchet arm to be moved in a plane parallel to said cutting plane;
- and
- e) wherein a portion a roller chain is attached to said second handle, threaded through said gap and can be engaged to said sprocket.
3 more elements
Dependencies are inferred from the claim text.