Explosive powder charge actuated fastening element driving devic

Details Explosive powder charge actuated fastening element driving devic Explosive powder charge actuated fastening element driving devic

1986-11-19

1987-12-08

Bell, Paul A.

Elongated-member-driving apparatus

Explosive-type driving means

With plunger

60638, B25C 114

Patent

active

047113855

ABSTRACT:
An explosive powder charge actuated fastening element driving device includes a driving piston mounted within a guide bore in an axially extending piston guide for displacement between a firing position and a driving position where the fastening element is driven into a receiving material. After driving a fastening element, the driving piston is returned toward the firing position by exhaust gases generated when a charge is fired. A channel laterally encloses the piston guide with a first and a second aperture, spaced apart in the axial direction, extending through the piston guide communicating between the guide bore and the channel. A blocking slide movable relative to the piston guide is located within the channel. The exhaust gases can flow through the first aperture into the channel and, when the blocking slide is displaced relative to the piston guide, entrapped in a storage space within the channel so that the exhaust gases flow through the second aperture into the guide bore and return the driving piston toward the firing position.

REFERENCES:
patent: 3589584 (1971-06-01), Ohlsson
patent: 3645091 (1972-02-01), Ivanov et al.
patent: 3744240 (1973-07-01), Henning et al.
patent: 4196834 (1980-04-01), Beton

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