Back to results
US 5,687,566 AGranted
Arrangement and method for removal of air from a hydraulic system
OwnerJon A. Pettyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerJon A. Pettyinventor
Estimating the term…
A hydraulic system has a master cylinder, one or more servo cylinders and a line connecting each servo cylinder to the master cylinder. Air is removed from a line by pumping hydraulic fluid into the respective servo cylinder using a reciprocating hand pump. The pump has a transparent pumping chamber which automatically refills with fluid after each pumping stroke, and the pumping chamber has graduations which indicate the amount of fluid in the pumping chamber. A measured amount of fluid equal to the volume of a line is pumped into the associated servo cylinder. If two servo cylinders are fed by respective branch lines of a common supply line, the amount of fluid pumped into the first servo cylinder equals the volume of the corresponding branch line while the amount of fluid pumped into the second servo cylinder equals the volume of the corresponding branch line plus the volume of the supply line.
An arrangement for removing a contaminant from a hydraulic system, comprising a member for introducing hydraulic fluid into the hydraulic system, said introducing member having an inlet for communicating with a source of hydraulic fluid, an outlet discrete from said inlet for communicating with the hydraulic system a holding chamber for hydraulic fluid to be discharged through said outlet, an expelling element for forcibly expelling hydraulic fluid through said outlet, and a device for fixing the effective volume of said chamber at any one of a plurality of values.
An arrangement for removing a contaminant from a hydraulic system, comprising a member for introducing hydraulic fluid into the hydraulic system, said introducing member having an inlet, a first outlet discrete from said inlet for communicating with the hydraulic system, and means for forcibly expelling hydraulic fluid through said outlet;
A method of removing at least one contaminant from hydraulic systems, comprising the steps of making a first adjustment to fix the effective volume of a chamber at a first value;
A method of removing a contaminant from a hydraulic system, comprising the steps of carrying a container of hydraulic fluid to the region of said hydraulic system together with a holding chamber for said hydraulic fluid, the carrying step being performed by a person;
Dependencies are inferred from the claim text.