Max Co., Ltd.

Masakazu Konishi

Katsuhiko Murayama

Keijiro Murayama

Jyunichi Tamura

Junichi Tamura

A gas combustion type driving tool includes a feed piston/cylinder mechanismby which a feed piston, engaged/disengaged to/from a connecting fastener housed in a magazine, is reciprocated in a fastener feed direction in which the piston is fed toward a nose partand a retracting direction opposite to the feed direction. The feed pistonis constantly spring-urged in the feed direction, and part of a combustion gas is supplied to a feed cylindervia a gas pipeprovided between the combustion chamberand the feed piston/cylinder mechanism, thereby operating the feed pistonin the retracting direction against a spring. In the gas combustion type driving tool, filtersfor cooling a combustion gas are located in the gas pipe

Gas combustion type driving tool

In a gas cartridge, inside of a metal made outer canis arranged with a metal made inner bagcharged with a fuel gas G. A space between the outer canand the inner bagis charged with a compression gas Gfor pressing to crush the inner bagin accordance with consumption of the fuel gas G. Pertinent positions on an inner side of the outer canare provided with deformation introducing members Pthrough Pfor producing an initial deformation for introducing a deformation of the inner bag when a press force of the compression gas Gis received.

Gas cartridge

Fuel gas or some other kind of fluid is stored in a collapsible metallic bag that is attached to a valve and is stored inside a rigid outer container. Between the rigid outer container and the collapsible bag is a space or volume filled with compression gas during use which puts a collapsing pressure evenly upon the bag. In order to reduce bag failures, the outer surface of the collapsible bag has a series of projected streak portions that project outwardly from the vertical length of the collapsing in several locations that prevent the bag from expanding to fill the entire space between the rigid outer container and the bag. These projected streaks form recessed portions in the bag's surface which facilitates the bag collapsing in those predetermined locations evenly which in turn reduces the collapsible bag's failure rate from breaking during operation.

In a feed piston and cylinder mechanism for feeding a feed claw that engages with and disengages from connected nails accommodated within a magazine to a nose portion, the feed claw is biased in a feeding direction by a bias member and is retracted in a backward direction by high-pressure combustion gas. A valve is provided in a path which guides the high-pressure combustion gas to the feed piston and cylinder mechanism and communicates the path with the atmosphere. The feed piston and cylinder mechanism is controlled by opening/closing the valve.

Gas combustion-type driving tool

In a gas cartridge, inside of an outer canis arranged with an inner bagcharged with a gas, and a space between the outer canand the inner bagis charged with a compression gas Gfor pressing to crush the inner bagin accordance with consumption of the gas. The outer canis integrally formed with a deformation introducing portion Pfor producing an initial deformation at the inner bag

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Tokyo, Japan

Masakazu Konishi