Cartridge strip magazine for powder-actuated fastener setting tool
First Claim
1. In combination with a magazine strip loaded with a cartridge, a powder-actuated fastener setting tool having a breech in whose inlet is nested a nose projecting from the magazine strip in which the cartridge is socketed, the cartridge when fired then producing a gas in the breech which expands to drive a fastener into a masonry body, and means to confine the expanding gas to the breech and thereby prevent it from escaping through a space between said nose and said inlet, said means comprising:
- A. a tool breech having an inlet formed by a frusto-conical upper entry section and an inwardly offset frusto-conical lower section, which forms an inlet step at a junction between the upper entry section and the lower entry section; and
B. said magazine nose being formed of resilient plastic material having a lower frusto-conical section which when the nose is nested in the breech inlet then abuts and conforms to the lower section of the inlet to create a broad lower seal, and an outwardly offset upper frusto-conical section which forms a nose step at a junction between the lower frusto-conical section and the upper frusto-conical section and which then abuts and substantially conforms to the upper section of the inlet to create a broad upper seal which together with the lower seal acts to prevent the escape of the gas and wherein a zone is formed between the inlet step and the nose step in which gas leaking through the lower seal is depressurized therein.
1 Assignment
0 Petitions
Accused Products
Abstract
A cartridge strip magazine for successively feeding cartridges into the breech of a powder-actuated fastener setting tool. When a cartridge in alignment with the breech is fired, the resultant expanding gas acts to propel a drive piston to launch a fastener. The inlet to the breech is provided with a frusto-conical upper entry section and an inwardly offset frusto-conical lower section having the same slope as the upper section. The magazine is molded of a strip of resilient plastic material having a row of noses projecting therefrom, each nose socketing a cartridge and being adapted to nest within the inlet of the tool breech. Each nose is formed with an outer wall having a frusto-conical lower section which when the nose is nested within the breech abuts and conforms to the lower section of the breech, and an outwardly-offset frusto-conical upper section that then abuts and conforms to the upper section of the breech.
55 Citations
8 Claims
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1. In combination with a magazine strip loaded with a cartridge, a powder-actuated fastener setting tool having a breech in whose inlet is nested a nose projecting from the magazine strip in which the cartridge is socketed, the cartridge when fired then producing a gas in the breech which expands to drive a fastener into a masonry body, and means to confine the expanding gas to the breech and thereby prevent it from escaping through a space between said nose and said inlet, said means comprising:
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A. a tool breech having an inlet formed by a frusto-conical upper entry section and an inwardly offset frusto-conical lower section, which forms an inlet step at a junction between the upper entry section and the lower entry section; and B. said magazine nose being formed of resilient plastic material having a lower frusto-conical section which when the nose is nested in the breech inlet then abuts and conforms to the lower section of the inlet to create a broad lower seal, and an outwardly offset upper frusto-conical section which forms a nose step at a junction between the lower frusto-conical section and the upper frusto-conical section and which then abuts and substantially conforms to the upper section of the inlet to create a broad upper seal which together with the lower seal acts to prevent the escape of the gas and wherein a zone is formed between the inlet step and the nose step in which gas leaking through the lower seal is depressurized therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification