Stud driver and spring therefor
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United States of America Patent
Stats
-
Feb 6, 2001
Grant Date -
N/A
app pub date -
Apr 16, 1998
filing date -
Sep 19, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A stud driver for driving fastener studs in place with the aid of a propelling piston moved by a propellant contains a return spring concentrically surrounding a piston rod of the propelling piston. The return spring has roughly the shape of a relatively thin-walled cylindrical sleeve of elastomeric material reinforced at regular intervals by metallic ring disks. These metallic ring disks prevent any uncontrolled deformation of the elastomeric sleeve in high-speed movement of the propelling piston.
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