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:
Jan. 22, 1980
Filed:
Jan. 31, 1978
James H Stubbings, Rockville, MD (US);
Potomac Applied Mechanics, Inc., Bethesda, MD (US);
Abstract
A powered impacting device including relativly movable concentric first and second pistons, the second piston providing a cylinder wall for guiding movement of the first piston. A spring is disposed between the pistons for exerting a biasing force maintaining the pistons in an initial relative position. A single impacting force is applied to the pistons, at first resulting in coincident movement thereof until the second piston drives an outer fastener component through workpieces to be fastened together, and then is stopped. The mass of the first piston is great enough to provide continued movement of the first piston, relative to the second piston against the bias of the spring, to drive an inner component of the fastener through the work to be assembled, deforming the outer component of the fastener so that the material pieces are held together.