Obturator sealing means for a split wedge/breechblock gun

Details Obturator sealing means for a split wedge/breechblock gun Obturator sealing means for a split wedge/breechblock gun

1997-11-25

1999-07-27

Johnson, Stephen M.

Ordnance

Breech closures

Gas checks

89 24, F41A 374

Patent

active

059293640

ABSTRACT:
An obturator for guarding the primary sealing surfaces of a step wedge brhblock gun from post-firing residue buildup assures greater survivability of the obturator without the necessity of cleaning after each firing. The device includes an active tube insert for facilitating face seal force multiplication, out of bore lip and face seals, an inbore piston polymer with expanding residue guard, and an out of bore face seal with a residue-tolerant polymer.

REFERENCES:
patent: 3547001 (1970-12-01), Stoner
patent: 4022104 (1977-05-01), Politzer et al.
patent: 5054366 (1991-10-01), Bartolles

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