Device and process

Details Device and process Device and process

1973-09-05

1976-04-27

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

F42B 320

Patent

active

039526569

ABSTRACT:
A stemming device for holes which device comprises at least one layer of a esilient material capable of forming a seal in conjunction with the wall of a hole, the seal being characterized in that it prevents, minimizes or substantially retards the flow of flowable, pourable or pumpable material from the hole. The device is used to stem a hole by positioning the same in the hole in a manner such that said stemming device forms a seal in conjunction with the wall of the hole capable of preventing, minimizing or substantially retarding the flow of flowable, pourable or pumpable material from the hole.

REFERENCES:
patent: 2007568 (1935-07-01), Heitzman
patent: 2296504 (1942-09-01), Crater
patent: 2632390 (1953-03-01), Madill
patent: 2916995 (1959-12-01), Douglass et al.
patent: 3151556 (1964-10-01), Karpovich
patent: 3236180 (1966-02-01), Towle
patent: 3264992 (1966-08-01), Beck
patent: 3648614 (1972-03-01), Berthmann et al.

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