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:
Mar. 24, 2020
Filed:
Feb. 22, 2018
Applicants:
Robert Ward Carter, Alameda, CA (US);
David B Crafts, Vallejo, CA (US);
Maxwell Frank Darrow, Hayward, CA (US);
Inventors:
Robert Ward Carter, Alameda, CA (US);
David B Crafts, Vallejo, CA (US);
Maxwell Frank Darrow, Hayward, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F16L 55/165 (2006.01); F16L 55/18 (2006.01);
U.S. Cl.
CPC ...
F16L 55/1658 (2013.01); F16L 55/18 (2013.01);
Abstract
A pipe bursting system and method are described wherein a bursting head pulled by a cable employs a relatively small pneumatic hammer and a relatively large cable tension to impose a cyclical hoop stress on the pipe being burst to cause fatigue failure of the pipe, resulting in lower size and power requirements, and higher efficiency for a given set of job requirements.