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:
Mar. 23, 2004
Filed:
Jan. 24, 2002
John D. Ward, Rocklin, CA (US);
Other;
Abstract
An automatic feed system is provided for advancing a hydraulically powered work head into a workpiece being cut. A hydraulic fluid powered work head motor drives a diamond drill cutting tool or other cutting tool to cut the workpiece, such as concrete G. Hydraulic pressure in an inlet line feeding hydraulic fluid to the work head motor is monitored to detect when high torque and hence high wearing forces are experienced by the diamond cutting tool . A feed motor or other advance is provided to feed the diamond cutting tool into the workpiece. A valve is provided which is pressure sensitive and controls the feed rate of the feed motor in response to pressure in the inlet line delivering hydraulic fluid to the work head motor . In this way, a feed rate of the bit or other cutting tool into the workpiece is reduced when high stress conditions exist on the cutting surface of the diamond drill cutting tool or other cutting tool.