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US 4,021,025 AGranted
Circle cutter
OwnerRonald A. Frameinventor
Life of this patent
Estimating the term…
Abstract
A circle cutting apparatus particularly adaptable for the cutting of circles and arcs in metal plates and the like with a cutting torch. The device comprises a circular platform which is attached to the plate to be cut and a torch or cutting implement which is radially adjustable with respect to the platform, the cutting apparatus being also movable in a circular path with respect to the platform.
Claims5
A circle cutting apparatus for cutting circles in metal plates and the like comprising;
- a platform having a circular track means secured thereto, means for attaching the platform to the plate to be cut, track follower means movably secured to the track means and capable of being moved completely around said track means, first bracket means attached to the track follower means, an elongated bar longitudinally, slidably attached to the first bracket means and being positioned perpendicular to the axis of the circular track means, cutting apparatus attachable to either end of the elongated bar and operably engageable with the plate to be cut, second bracket means attached to the track follower means, drive means mounted on said second bracket means operably connectable with the platform for moving said track follower means around the circular track means, wherein the drive means comprises a drive motor, a gear reduction means operably connected to the motor and having an output rotating shaft, a drive wheel connected to the rotating shaft for rotation therewith and engageable with the platform for effecting movement of the track follower means with respect to the platform, wherein the drive wheel means comprises a first large wheel connected to the shaft, a second smaller wheel also connected to the shaft and spaced from the large wheel, and wherein said second bracket means is radially adjustable with respect to the track follower means whereby said bracket may be selectively adjusted to place either the large or small wheel into frictional contact with the platform.
Dependencies are inferred from the claim text.