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:
Mar. 29, 1988
Filed:
Jun. 27, 1986
Stephen J Bilsbury, Godfrey, IL (US);
Peter F Grelle, Edwardsville, IL (US);
Olin Corporation, Stamford, CT (US);
Abstract
An improved shot wad structure has a longer outer wad cup, a shorter inner wad cup and a plastic wad insert, and is useful in a shotshell with hard shot pellets, such as steel or tungsten shot. The outer cup, formed of a soft, low tensile strength material, such as polyethylene, is capable of obturating combustion gases produced in a gun barrel when the shotshell is fired, whereas the inner cup, formed of a tough, high tensile strength material, such as nylon, is adapted to support a shot column and is capable of withstanding compressive forces generated by shot acceleration to protect the barrel from being scored by the hard shot. The wad insert, disposed within the outer cup above its bottom and below the bottom of the inner cup, is formed of a foam material which is one-way crushable for permitting insertion of the inner cup within the outer cup to any one of several different depths therein at which a corresponding number of different volumes of space are defined within the outer cup for containing shot columns of various shot load sizes. The wad insert once crushed still has sufficient compressive strength to support the inner cup at the desired depth within the outer cup.