Innerscoping hydraulic system

Details Innerscoping hydraulic system Innerscoping hydraulic system

2004-03-11

2008-11-11

Kershteyn, Igor (Department: 3745)

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

C092S051000, C092S110000, C092S16500R

Reexamination Certificate

active

07448310

ABSTRACT:
A hydraulic cylinder and associated hydraulic system that includes a sleeve cylinder in mechanical contact with a base and stationary between extended and retracted positions, which defines a second hydraulic fluid chamber. An internal cylinder is retained within the sleeve cylinder, defining a first hydraulic fluid chamber. A piston is employed having a piston rod retained within the sleeve cylinder, and a piston cap retained within the internal cylinder. An inner portion is defined between the piston cap and an interior portion of the internal cylinder. The internal cylinder is adapted to be displaced to the extended position to deliver a first power stroke upon pressurizing the first or second hydraulic chambers with hydraulic fluid. The inner portion is adapted to displace the sleeve and internal cylinder to the retracted position upon being pressurized with hydraulic fluid, to thereby deliver a second power stroke.

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