Sound-dampened driving apparatus for fasteners
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United States of America Patent
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-
Sep 2, 1986
Issued Date -
N/A
app pub date -
Oct 22, 1984
filing date -
May 20, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a sound-dampened driving apparatus for fasteners wherein a main valve means is arranged above a working cylinder of the apparatus and movable within a cylindrical bore. When the main valve means is in its lower at rest position, the main valve means separates the working cylinder from a source of compressed air and connects the cylinder to the atmosphere. When the main valve means is in its upper actuating position, the working cylinder is connected to the source of compressed air and the valve means blocks the cylinder connection to the atmosphere. The space above the main valve member within the cylindrical bore is capable of being alternately connected to either the atmosphere or compressed air, and includes a sound dampening means arranged in the space above the main valve member.
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