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. 27, 1996
Filed:
Feb. 21, 1995
John A Franzini, Salem, NH (US);
Gennaro L Pecora, Manchester, NH (US);
Burndy Corporation, Norwalk, CT (US);
Abstract
A cartridge for a powder actuated tool having a cartridge case, a powder propellant, a bushing, and a piston. The piston has a tapered outer diameter that is larger in a rear end of the piston and is compressed inward by the cartridge case. A port extends through the piston and has an entrance to the port at a rear end of the piston with a semi-spherical shape to slow gas flow rate passing through the port and reduce the amount of propellant residue passing through the port. The piston has a main section and a cantilevered section. The cantilevered section has a general ring shape and forms a portion of the outer diameter of the piston.