Title: Explosive powder operated setting device

Abstract: In an explosive powder operated device using caseless powder charges for firing fastening elements into a hard receiving material, the firing chamber in the barrel of the device is defined in part by one end of a counterhammer. The one end includes a sealing ring having a frusto-conical sealing surface supported on a correspondingly shaped surface on an axially extending body part of the counterhammer. When a caseless charge is ignited in the firing chamber, the explosive gases generated act in direct surface contact on at least a portion of the sealing ring which faces into the firing channel.

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Inventors: Jochum, Peter (Meiningen, AT)

Application Number: 881812
Filing Date: 1978-02-27
Publication_date: 1979-02-13
Assignee: Hilti Aktiengesellschaft (Schaan, LI)
Primary Class(es): 42/106 227/10
Other Classes:
US Patent Ref:

3283657	Nov, 1966	Kvavle	42/1.
3296728	Jan, 1967	Kvavle	42/1.
3688964	Sep, 1972	DeCaro	227/10.
3777382	Dec, 1973	Brunelle	42/1.
4063672	Dec, 1977	Jochum	227/10.

Other Refs:
Primary Examiner: Jordan, Charles T.
Assistant Examiner:
Attorney: Toren, McGeady, Stander