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:
Jun. 05, 1979
Filed:
Oct. 02, 1978
Otto Marzy, Steyr, AT;
Abstract
Known machines for milling a crankshaft comprise a longitudinal carriage movable in a first direction, a tool carriage movable on the longitudinal carriage for reciprocation relative thereto in a direction transverse to the first direction, a cutter head mounted on the tool carriage for rotation and having a cutting tool with inwardly directed cutting edge extending along a cutting circle and a chuck supporting a workpiece for rotation about the same axis as the cutter head and surrounded by the cutting circle. The invention provides a copying attachment comprising a template connected to the tool carriage for reciprocation therewith and having an arcuate edge portion, a roller mounted on the longitudinal carriage for rotation about an axis parallel to the axis about which the arcuate template edge portion is centered, a crank revolving the roller about a third axis parallel to, and spaced from, the said axes, and a hydraulic actuator connected to the tool carriage and including a head applying pressure to a side of the roller remote from the template edge portion, the actuator being operable to press the head into engagement with the remote roller side to force the roller towards the edge portion of the template.