Patent ID: 6735944
Filing Date: 2004-05-18
Classification: B21J,B23Q,B25B,F15B

Abstract:
A pressure intensifier for supplying force to a work piece, the pressure intensifier comprising:a housing; first, second and third pistons slidably positioned in said housing; a substantially incompressible fluid positioned between said second piston and said third piston; and a rod coupled to said first piston, said first piston and rod slidably drivable between an advanced position and a retracted position by a fluid power source, said rod cooperating with a seal to selectively capture said substantially incompressible fluid in a high pressure chamber, wherein a first side of said first piston is selectively powered to drive said rod into said high pressure chamber thereby producing an amplified force on said third piston, and wherein a second side of said first piston is selectively pressurized to drive said rod toward said retracted position, wherein said rod includes a first portion and a second reduced portion, wherein said first portion is selectively engageable with said seal to capture said substantially incompressible fluid in said high pressure chamber, and wherein said second reduced portion of said rod is selectively positionable proximate said seal to allow said substantially incompressible fluid to exit and enter said high pressure chamber.