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:
Feb. 28, 1984
Filed:
May. 11, 1982
Applicant:
Inventors:
Pierre-Claude Layotte, Les Mathes, FR;
Laurent Bozec, Le Vesinet, FR;
Assignees:
Institut Francais du Petrole, Rueil-Malmaison, FR;
Compagnie Generale de Geophysique, Massy, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
173 94 ; 72406 ;
Abstract
A device for preventing secondary impacts of a mass against a target member, as used in particular for generating shear waves in the earth, is provided. The mass is secured at the end of a pivotable rigid arm actuated by driving device, and the driving device adapted to block the fall of the rigid arms, comprises a cam co-operating with a pawl when it registers therewith and with a flat part of the cam with the registering conditions occurring only after the first impact of the mass and its bounce against the target member.