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:
Apr. 19, 1977
Filed:
Oct. 22, 1975
Paul K Davis, Alameda, CA (US);
Pacific Roller Die Co., Inc., Hayward, CA (US);
Abstract
The present invention relates to machines for recorrugating the ends of a helically corrugated pipe. One end of the pipe is inserted between and engaged by a juxtaposed pair of recorrugating rollers. The rollers are mounted on shafts which are driven to recorrugate the end of the pipe. As an improvement in such machines, the present invention provides a rotatable annular thrust ring, the marginal portion of which passes between the shafts. At least a portion of the end of the pipe to be recorrugated is abutted against the thrust ring to prevent axial movement of the pipe as it is being recorrugated. The ring is allowed to rotate during the recorrugating process to minimize damage to the end of the pipe.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile