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US 5,307,974 AGranted
Rivet setting tool
AssigneeEmhart Inc.
InventorsEymard J. Chitty, David S. Rimkoski
Life of this patent
Estimating the term…
Abstract
A rivet tool is mounted on a bracket which can be moved vertically up and down suitable guides. To counterbalance the system an air cylinder supports the bracket and a precision pressure regulator responds very rapidly to continuously maintain a selected pressure in the cylinder. The tool will accordingly be maintained in a perfectly counterbalanced condition continuously.
Claims2
A rivet setting tool assembly comprising
- a rivet setting tool,
- bracket means for supporting said rivet setting tool, and
- means for supporting said bracket means for counterbalanced vertical movement throughout its displacement between an upper position and a lower position including
- vertical air cylinder means including a chamber and a displaceable rod connected to said bracket means,
- precision pressure regulator means connected to said air cylinder means via an air line for continuously maintaining a predetermined pressure in said chamber of said air cylinder means, and
- a normally closed two way, spring return solenoid valve located in said air line and displaceable from an open position allowing flow through said air line to a closed position closing said air line to prevent the displacement of said bracket means in the event electrical power is lost.
3 more elements
Dependencies are inferred from the claim text.