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. 17, 1976
Filed:
Sep. 19, 1974
William J Swenson, Houston, TX (US);
Raymond International, Inc., Houston, TX (US);
Abstract
Method and apparatus for forming piles in the earth with a pile hammer rig having a crane, a hoisting drum carried by the crane, a driving mechanism for driving the drum through a clutch assembly, a braking assembly for the drum, a hoisting rope leading from the drum for lifting a drop-weight, an automatic sensor for sensing the top of the drop-weight stroke for disengaging the clutch mechanism, a second automatic sensor for sensing the bottom of the drop-weight stroke for engaging the drum braking assembly, and in one form of the invention an automatic sensor for sensing the rotation of the hoisting drum for disengaging the braking assembly and engaging the clutch assembly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile