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US 4,457,200 AGranted
Method for cutting heavy wall tube
AssigneeAlpha Industries, Inc.
InventorJohn J. Borzym
Life of this patent
Estimating the term…
Abstract
Method for cutting heavy wall steel tubing. The tubing is notched and cut through along a vertical axis but the blade is narrower than the interior diameter so as to leave the side walls uncut. A side wall is preferably notched during the first cut. Thereafter, a second blade is driven horizontally through the side notch to complete the cut.
Claims4
A method of distortion-free tube cutting comprising the steps of:
- (a) notching a section of tube wall;
- (b) cutting through the tube using a first blade having a width less than the diameter of the tube along a first path which enters the previously cut notch;
- (c) notching a second uncut section of tube wall adjacent the first path;
- and
- (d) thereafter cutting through the remaining uncut walls of the tube using a second blade along a second path which enters the subsequently cut notch and which path is angularly spaced from the first path.
2 more elements
A method of cutting a thick wall tube comprising the steps of:
- (a) notching a top section of the tube,
- (b) cutting vertically entirely through the notched top section and a bottom section while leaving opposite side sections at least partly uncut,
- (c) simultaneously with step (b) notching a side section, and
- (d) thereafter cutting horizontally entirely through the notched and uncut side sections.
1 more element
Dependencies are inferred from the claim text.