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Hydraulic system for harvesting machines
T986004 Hydraulic system for harvesting machines

Patent Drawings:
Inventor: Stroup, et al.
Date Issued: September 4, 1979
Application: 05/939,307
Filed: September 5, 1978
Inventors: Krukow; Eugene J. (Cordova, IL)
Stroup; Norman G. (Orion, IL)
Assignee: International Harvester Company (Chicago, IL)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 60/422; 60/484; 91/516; 91/530; 91/532
Field Of Search:
International Class:
U.S Patent Documents:
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Abstract: an open center hydraulic system in which a pair of flow divider valves is connected in series with the system's hydraulic pump to create a parasitic pressure upstream of these flow valves and the feeder and separator clutches are controlled remotely by simple solenoid actuated two-position valves. The cylinders actuating the clutches are of sufficient size upon application of the minimum parasitic pressure to hold the clutches in a given position so that no center neutral position is necessary on the two-position valves.
Claim:
Description:
 
 
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