US 10,350,693 B1 · Circle cutting system

Abstract

An attachment to fit to a nozzle portion of an oxy-fuel torch that enables an operator to precisely cut a circle in a metal without having to move during operation is disclosed. The attachment includes a nut threadably attached to the nozzle portion that in turn holds a brass bushing that is concentrically and coaxially arranged inside a bearing within a bearing retainer. Further, a torch radius adjustment arm retainer is slidably locked to the bearing retainer via a dovetail joint and is configured to slidably receive a long arm of an L-shaped radius adjustment, further secured by a first thumb screw. The operator cuts the circle having a radius equal to distance between the nozzle portion and a replaceable radius pivot point threadably attached at end of a short arm of the radius adjustment arm by pivoting on said pivot point and rotating the torch in the circle.

Claims12

Dependent claims

A circle cutting system, configured to permit a torch to cut a circle through a material surface having an indentation therein;

the circle cutting system comprising:
a torch nut, further comprising a torch nut threaded center joined to a torch nut seat;
wherein the threaded center is adapted to mate with the torch;
a bushing, further comprising a bushing sleeve joined to a bushing flange;
wherein the busing flange is immediately adjacent to the torch nut seat;
a bearing, press fit onto the bushing;
a bearing retainer, immediately adjacent to the bearing;
an attachment assembly, connected to the bearing retainer and further comprising a pivot point adapted to fit into the indentation;
wherein the attachment assembly further comprises:
a radius adjustment arm attached to the pivot point;
and
an attachment assembly housing wherein the attachment assembly housing further comprises a dovetail socket;
wherein engaging the torch through the bushing enables a user to rotate the torch around the pivot point.

10 more elements

Dependencies are inferred from the claim text.

Circle cutting system

Life of this patent

Circle cutting system

Life of this patent

Abstract

Claims12