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:
Aug. 18, 1998
Filed:
Nov. 06, 1996
Applicant:
Inventor:
Karl H Moller, Westlake, OH (US);
Assignee:
Diamond Products Joint Venture, Elyria, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175170 ; 175203 ; 408 16 ; 408 76 ;
Abstract
In a preferred embodiment the core drilling rig of the present invention includes a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit, and a control system for controlling the supply of electric power to the drive motor. The control system includes a motion sensitive device for detecting the unwanted movement of the base and suspending the supply of electric power to the motor.