Explosive powder operated setting device
AssigneeHilti Aktiengesellschaft
InventorPeter Jochum
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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.
Claims9
An explosive powder operated device for setting fastening elements, such as bolts, studs and the like into a hard receiving material, comprising a housing, a barrel mounted in said housing and having a forward end and a rearward end, said barrel having an axially extending bore from which fastening elements are driven from the forward end of said barrel into the receiving material, a firing chamber within said barrel arranged to supply explosive gases into said bore, a counterhammer mounted in said barrel for feeding caseless powder charges into said firing chamber and said counterhammer forming one of the end faces of said firing chamber, wherein the improvement comprises that said counterhammer includes an axially extending body having an axially extending surface and an end surface extending transversely of the axially extending surface and located adjacent to said firing chamber, and a sealing ring supported on said end surface and located between the end surface and said firing chamber.
Dependencies are inferred from the claim text.