Abstract A dummy center-fire cartridge or shotgun shell having a flexible shock-absorbing plastic ''''primer'''' or non-explosive body or slug, is disclosed for use in dry-firing a firearm without harm to or breaking of the fing pin or other parts of the gun. The plastic body is formed or molded within the primer pocket of an empty cartridge case and is formed around and into any indentations or holes such as the flash hole so that it is rigidly affixed therein. The plastic body is composed of a non-shrinking thermosetting resin such as polyurethane, characterized by toughness, high tensile strength; and tear, chemical and abrasianresistance. The plastic body allows partial travel of the firing pin therein with little or no rebound tendency. The impression made in the plastic body is quickly healed because of the elastic memory of the plastic so that repeated hammer falls on the same cartridge or shell are not detrimental to the firing pin or the plastic body.
Inventors
👤 H Seminiano
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 05:34
CPC Classifications
F; F42; F42B; F42B8/00; F42B8/02; F42B8/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A dummy cartridge suitable for dry-firing practice comprising: a cartridge case having a base end with a center fire primer pocket therein; said primer pocket including a flash hole defined by said base end and a shock-absorbing plastic body molded within said primer pocket, characterized by its toughness and ability to recover after penetration by a firing pin; an integral portion of said plastic body extending within said flash hole in interfacial locking relationship.
Claim 2
Dependent Claim
74 words
A dummy cartridge suitable for dry-firing practice comprising: a cartridge case having a base end with a center fire primer pocket therein; said primer pocket including a flash hole defined by said base end and a shock-absorbing plastic body molded within said primer pocket, characterized by its toughness and ability to recover after penetration by a firing pin; an integral portion of said plastic body extending within said flash hole in interfacial locking relationship.
Claim 3
Dependent Claim
15 words
A dummy cartridge in accordance with claim 1 in which: said plastic body comprises polyurethane.
Claim 4
Dependent Claim
54 words
A dummy cartridge suitable for dry-firing practice comprising: a cartridge casing having a center fire primer pocket; said primer pocket including a flash hole; said primer pocket being filled with a shock-absorbing plastic body extending through said flash hole and characterized by its toughness and ability to recover after penetration by a firing pin.
Claim 5
Dependent Claim
54 words
A dummy cartridge suitable for dry-firing practice comprising: a cartridge casing having a center fire primer pocket; said primer pocket including a flash hole; said primer pocket being filled with a shock-absorbing plastic body extending through said flash hole and characterized by its toughness and ability to recover after penetration by a firing pin.
Claim 6
Dependent Claim
54 words
A dummy cartridge in accordance with claim 3 in which: said plastic body is characterized by a Durometer Shore A hardness of about 85 to 120, a tensile strength of about 1,000 to 2,000 psi, an elongation of about 250 to 270 and a tear strength of at least about 900 to 1,500 lb/in.
Claim 7
Dependent Claim
19 words
A dummy cartridge in accordance with claim 3 in which said plastic body comprises polyurethane having the following characteristics:
Claim 8
Dependent Claim
36 words
A dummy cartridge in accordance with claim 3 in which: said primer pocket includes a primer cup having said plastic body molded therein and with a portion extending into the flash hole of the primer cup.