Tubing cutters
First Claim
1. A hand operated tool for use in cutting tubing and other cylindrical materials, said tool comprising:
- a clamp portion having spaced apart first and second jaws extending therefrom and handles extending opposite said first and second jaws;
said first jaw including a cutting jaw having a cutting blade and said second jaw including a roller jaw having a forward and a rear roller with said cutting jaw and said roller jaw comprising a cutting portion;
roller bearing means providing relative movement between said clamp portion and said cutting portion;
said clamp portion including centrally located pivot means and providing a lateral opening between said cutting jaw and said roller jaw opposite said pivot means;
said clamp portion further including a spring urging said first jaw and said second jaw together, wherebysaid handles are urged together to space apart said roller jaw and said cutting jaw, said cylindrical material is inserted between said spaced apart roller jaw and cutting jaw, said handles are released to allow said spring to urge said rollers and said cutting blade against said cylindrical material, and said tool is rotated about said cylindrical material to provide a circumferential cut by means of said cutting blade as said cutting blade is continually biased against said cylindrical material by means of said spring.
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Accused Products
Abstract
A tool for cutting tubing or light pipe provides conventional cutting rollers and a blade in combination with a spring loaded, open jaw clamp. The open jaw permits the tool to be passed over the side of the material to be cut, while the spring compressive force automatically urges the cutting blade into the material being cut as the tool is rotated around the material in the manner of conventional tubing and pipe cutters. Thus, the need to continually adjust the cutting blade as the cut deepens is eliminated. Two basic embodiments are disclosed, one comprising a handled clamp type tool with or without foldable or extendible handles, and the other comprising a C clamp type tool. The spring loading arrangement of the cutting blade is common to both. Various versions and improvements are also disclosed, including mechanisms providing for parallel actuation of the cutting assembly, proper spacing of the cutting rollers, and maintaining the proper angular relationship between the rollers and the cutting blade.
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Citations
9 Claims
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1. A hand operated tool for use in cutting tubing and other cylindrical materials, said tool comprising:
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a clamp portion having spaced apart first and second jaws extending therefrom and handles extending opposite said first and second jaws; said first jaw including a cutting jaw having a cutting blade and said second jaw including a roller jaw having a forward and a rear roller with said cutting jaw and said roller jaw comprising a cutting portion; roller bearing means providing relative movement between said clamp portion and said cutting portion; said clamp portion including centrally located pivot means and providing a lateral opening between said cutting jaw and said roller jaw opposite said pivot means; said clamp portion further including a spring urging said first jaw and said second jaw together, whereby said handles are urged together to space apart said roller jaw and said cutting jaw, said cylindrical material is inserted between said spaced apart roller jaw and cutting jaw, said handles are released to allow said spring to urge said rollers and said cutting blade against said cylindrical material, and said tool is rotated about said cylindrical material to provide a circumferential cut by means of said cutting blade as said cutting blade is continually biased against said cylindrical material by means of said spring. - View Dependent Claims (2, 3, 4, 5)
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6. A hand operated tool for use in cutting tubing and other cylindrical materials, said tool comprising:
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a clamp portion having spaced apart first and second jaws extending therefrom and handles extending opposite said first and second jaws; said first jaw including a cutting jaw having a cutting blade and said second jaw including a roller jaw having a forward and a rear roller with said cutting jaw and said roller jaw comprising a cutting portion; said second jaw further including a jaw channel providing means for movement of said forward roller and said rear roller within said roller jaw, said clamp portion including centrally located pivot means and providing a lateral opening between said cutting jaw and said roller jaw opposite said pivot means; said clamp portion further including a spring urging said first jaw and said second jaw together, whereby said handles are urged together to space apart said roller jaw and said cutting jaw, said cylindrical material is inserted between said spaced apart roller jaw and cutting jaw, said handles are released to allow said spring to urge said rollers and said cutting blade against said cylindrical material, and said tool is rotated about said cylindrical material to provide a circumferential cut by means of said cutting blade as said cutting blade is continually biased against said cylindrical material by means of said spring. - View Dependent Claims (7, 8, 9)
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Specification