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. 25, 1985
Filed:
May. 18, 1984
Applicant:
Inventors:
Gerald F Rome, Houston, TX (US);
Frank L Lankford, Jr, Bellaire, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66D / ; B66D / ;
U.S. Cl.
CPC ...
254269 ; 254337 ;
Abstract
A safety system for an oil well type derrick that has a crown block and a traveling block and drawworks for raising and lowering the traveling block. It uses electrical sensing means to detect the presence of the traveling block, and it has electronic circuits to control an actuator for braking the drawworks in order to prevent the traveling block from contacting the crown block.