Fluid intensifier
AssigneeMoog Inc.
InventorRalph L. Vick
Life of this patent
Estimating the term…
Abstract
A fluid intensifier (10) includes an unequal-area pump piston (11) and a drive piston (14). The large-area pump piston chamber (21) communicates with the small-area pump piston chamber (29) via a communicating conduit (30) having a check valve (25) therein. The pump piston is coupled to a drive piston (14) having a lost-motion connection (18) with a two-lobed pilot valve spool (41). The pilot valve (16) controls a pilot pressure in the spool end chamber (60) of a spring-biased control valve (19). The fluid intensifier is automatically reversing as the pump piston approaches either end of its stroke, and is arranged to provide a substantially-constant intensified fluid pressure (P.sub.i) at an outlet.
Claims11
A fluid intensifier, comprising:
- a pump piston mounted for sealed sliding movement within a pump cylinder;
- a rod having one end mounted on said pump piston and having a portion sealingly penetrating an end wall of said pump cylinder;
- said pump piston having a large-area surface facing into a first end chamber and having a small-area surface facing into a second end chamber;
- a first source of pressurized fluid;
- inlet conduit means operatively arranged to permit unidirectional flow from said first source to said first end chamber;
- communicating conduit means operatively arranged to permit unidirectional flow from said first end chamber to said second end chamber;
- outlet conduit means operatively arranged to permit unidirectional flow from said second end chamber to an outlet;
- a drive piston mounted for sealed sliding movement within a drive cylinder, said drive piston being connected to said rod for movement therewith, said drive piston having a surface facing into a drive end chamber;
- a second source of pressurized fluid;
- and
- control valve means for alternately communicating said drive end chamber with said second source or a fluid return such that when said drive end chamber communicates with said second source, said pump piston will be driven to decrease the volume of said first end chamber and to provide a first intensified pressure at said outlet and when said drive end chamber communicates with said return, said pump piston will be driven to decrease the volume of said second end chamber and to provide a second intensified pressure at said outlet.
Dependencies are inferred from the claim text.