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:
Nov. 17, 1998
Filed:
May. 13, 1997
Ronald J Voorhees, La Jolla, CA (US);
Other;
Abstract
A safety apparatus for a derrick on an oil drilling rig includes a cable having a first end for connection to one side of the derrick at a predetermined location spaced below the crown. A series of pulleys is secured to the oil derrick to define a predetermined path for the cable extending from the fixed first end across the derrick at the predetermined location and then down the derrick to a location adjacent the lower end. The portion of the cable extending across the derrick is positioned in the path of a traveling block as it is pulled up the derrick. An alarm device is linked to the cable to produce an output alarm signal if the cable is pulled up by the traveling block as it approaches the top of the derrick, giving the operator a warning that the traveling block should be stopped to avoid impact with the crown.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile