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:
Aug. 03, 1993
Filed:
Apr. 24, 1992
Applicant:
Inventors:
Charles B Jennings, Phoenix, AZ (US);
Gregory St George, Phoenix, AZ (US);
Warren France, Phoenix, AZ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405282 ; 405272 ;
Abstract
A shoring device for supporting a trench. The device has opposite shields of non-conductive material such as fiberglass. Hydraulic actuators extend between the shields. A spring return assembly also extends between the shields and is enclosed in a tube. A positive locking device may be secured to either the actuator or spring return assembly. In an alternate embodiment, the shields may have removable sections to accommodate obstructions in the trench.