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:
Jul. 09, 1991
Filed:
Aug. 10, 1990
Thomas E Jewett, Littleton, CO (US);
Foresight Industries, Inc., Commerce City, CO (US);
Abstract
A ground rod driver is provided with a clamp mechanism which transmits impact blows from a driving tool such as a jackhammer to an intermediate portion of the rod at a convenient level above the ground to drive the clamped portion to ground level and which then releases the rod under the action of the same driving tool so that it may be raised above the ground and reclamped to the rod for driving the next increment of rod length into the ground. The driver receiving impact blows from the tool will automatically grip the rod when the impact tool is in a driving position and will automatically release the rod when the impact tool is in a releasing position. A ground plate surrounds the rod to bottom the driver for the release step. Specifically, the impact tool engages a wedge in the driver in its driving position to clamp the driver on the rod and is rotated 90.degree. to engage release blocks on the driver when the wedge is bottomed on the plate for releasing the rod.