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:
Feb. 22, 1977
Filed:
Mar. 19, 1975
Marvin R Anderson, Grosse Pointe Shores, MI (US);
Harald N Jungesjo, Rochester, MI (US);
Anderson-Cook, Incorporated, St. Clair Shores, MI (US);
Abstract
A grinding machine and dresser therefor for dressing a grinding wheel of the machine to grind a crooked configuration in a workpiece. The dresser includes a holder for a template having the cutting profile of the grinding wheel as well as a holder for a cutting tool that dresses the wheel. The tool holder is mounted for movement with a template follower in an antifriction manner so that the cutting tool dresses the grinding wheel with the cutting profile. Cutting profiles for grinding precise toothed configurations are possible with the dresser. A carriage of the machine on which the dresser is mounted is slidably movable with respect to a base of the machine by axial movement of a dual threaded drive screw having right and left-hand threaded portions spaced axially along its length. First and second nuts respectively fixed on the base and the dresser each receive one threaded portion of the drive screw so its rotation moves the dresser relative to the carriage in the same direction and the same distance the carriage is moved relative to the base. The relative movement of the dresser with respect to the carriage causes a dressing of the wheel in a manner that maintains the same cutting depth of the workpiece before and after dressing. A hydraulic actuated pawl and ratchet power unit rotates the drive screw a controlled amount to index the carriage and dresser for a dress cycle. An electric screw brake is actuable to prevent the drive screw rotation and an electric nut brake that holds the first nut against rotation on the base during the dress index is then released to permit manual or power driven rotation thereof so as to drive the screw in a vertical direction without rotation and thereby raise or lower the carriage without the relative movement of the dresser.