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:
Oct. 12, 2010
Filed:
Jul. 11, 2007
Roger Pellenc, Pertuis, FR;
Christian Rolland, Cucron, FR;
Bertrand Bouyou, Jaen, ES;
Pellenc Iberica, SL, Jaen, ES;
Abstract
The invention relates to vibrating tongs, including two opposing jaws in which the closing or opening movements are achieved through one or several hydraulic jacks, referred to as clamping jacks. These tongs are especially remarkable in that the oil intake chamber or pressure chamber of the clamping jacks that control the closing motion of the jaw or jaws, is linked to a mechanism fitted to detect any pressure rise inside the chamber that occurs when the tong jaws come into contact with the trunk of a tree. Blocking devices are controlled by the detection mechanism, and any increase in the pressure of the jaws on the trunk is opposed as soon as such a pressure rise occurs in the oil intake chamber.