Device at an energy accumulating piston-cylinder tool

Details Device at an energy accumulating piston-cylinder tool Device at an energy accumulating piston-cylinder tool

2007-09-18

2007-09-18

Burch, Melody M. (Department: 3683)

Spring devices

Fluid

Expansible-contractible chamber device

C303S087000, C138S030000, C138S031000

Reexamination Certificate

active

10250710

ABSTRACT:
The present invention relates to an arrangement in an energy-accumulating piston-cylinder device (1, 2) having a piston (2) and a cylindrical casing (1). The invention is characterized by an openable safety valve (1) arranged in the piston (2) and/or a discharge duct (11) together with an element (8; 17) arranged on the cylindrical casing (1) or the safety valve (10) and in the cylinder chamber, which element is designed, in the event of the piston (2) being inserted into the cylinder chamber by more than a predetermined distance, to act upon the safety valve/the discharge duct (10, 11) in order to expose the said duct (11), permitting a discharge of the pressure in the cylinder chamber.

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