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US3848350A Expired / Lapsed US ⏱️ 0.0 years remaining

Dry fire cartridge or shot shell

Assignee: Individual
•
Filing: 1973-08-10
•
Granted: 1974-11-19
•
Expires: 1993-08-10
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Abstract

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 —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 05:15
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.

References Cited (Backward Citations)

US119357A Cited
GB596261A Cited
US3016832A Cited
US3678609A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-18 1978-05-20 1978-11-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-18 1982-05-20 1982-11-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-18 1986-05-20 1986-11-19 $7700.00 Window Closed / Lapsed

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