The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Mar. 17, 1976
Dale L Keller, Gettysburg, PA (US);
Other;
Abstract
A device for undercutting a rotating workpiece is provided wherein the tool carried by the toolholder is actuated into and out of engagement with the workpiece at predetermined feed locations. A base forms the mounting for the undercutter attachment with the toolholder being pivotally mounted on said base. The tool is moved axially in one direction along the workpiece to provide cutting. When the end of the travel has been reached, the tool moves in the opposite or return direction and the tool is automatically disengaged prior to reaching the start of the undercut portion. The actuator for the tool includes a pivoted arm and stationary trip cam on the machine tool. A positive latch holds the tool in the cutting position and a release trigger engages the trip cam to release the latch during the return feed at the proper position. The latch comprises a biased pin and the pivotal toolholder is biased by a spring activated cylinder. The trip cam includes a button having a spring with sufficient strength to overcome the countering forces of the cylinder and the latching pin to assure proper actuation of the tool. The method includes the steps of maintaining the tool out of the path of the workpiece, moving the tool into undercut working engagement, continuing to feed the tool to provide an extended undercut, returning the tool, and disengaging the tool during the return feeding.