Patents by Inventor Ellis H. Born

Patent number: 5538401
Abstract: A variable displacement axial piston pump has a plurality of piston bores each connected to an inwardly angled fill port. The fill ports extend from the piston bores inwardly to the working face of the barrel to reduce the diameter of the fill circle of a pump. This decreases the velocity that must be attained by incoming fluid to thereby increase the operating speed at which the pump may be driven where the pump is filled at atmospheric pressure.
Type: Grant
Filed: July 5, 1994
Issued: July 23, 1996
Assignee: Denison Hydraulics Inc.
Inventors: Larey D. Schaffner, Lawrence R. Geise, Jack W. Wilcox, Ellis H. Born
Patent number: 5076145
Abstract: A manual servo control valve for variable displacement axial piston pump incorporating a blocking mechanism which serves to block the inlet and outlet ports of the valve when the valve is not operating to change the displacement of the pump.
Type: Grant
Filed: June 4, 1990
Issued: December 31, 1991
Assignee: Hagglunds Denison Corporation
Inventors: Ellis H. Born, David L. Thurston
Patent number: 4892465
Abstract: A control for a variable displacement pump in which a displacement control element is made responsive to a load sensing valve and a pilot pressure relief valve. A control fluid is supplied to the pressure relief valve and the load sensing valve and the control pressure fluid controls the working pressure fluid which operates the stroking piston for the pump.
Type: Grant
Filed: September 14, 1988
Issued: January 9, 1990
Assignee: Hagglunds Denison Corporation
Inventors: Ellis H. Born, David L. Thurston, Lee A. DeBoer
Patent number: 4455124
Abstract: A pressure compensated pump which supplies fluid to a common header has an automatic pressure compensator adjustment mechanism which adjusts the pressure setting of the pressure compensator in response to changes in the displacement of the pump, such that the compensator pressure setting of the pump is reduced when the displacement of the pump increases to increase pump flow and the pressure setting is increased when the displacement of the pump decreases to reduce pump flow.
Type: Grant
Filed: December 20, 1982
Issued: June 19, 1984
Assignee: Abex Corporation
Inventors: Ellis H. Born, William H. Meisel, Paul B. Wolfe
Patent number: 4336003
Abstract: A control for a variable displacement pressure compensated pump in which pressurized control fluid regulates the setting of a sequence valve to set the maximum output pressure of the pump and also set the displacement of the pump. The sequence valve is a two-stage device which utilizes a sequence poppet stage and cone stage. When working fluid pressure exceeds the setting of the sequence valve, the cone stage spills to reduce the displacement of the pump. If the pressure is not reduced fast enough the sequence poppet spills to more rapidly reduce the displacement of the pump.
Type: Grant
Filed: August 11, 1980
Issued: June 22, 1982
Assignee: Abex Corporation
Inventors: William D. Kramer, Ellis H. Born
Patent number: 4216699
Abstract: The instant invention relates to an electrically operated control which operates the displacement setting mechanism of a variable displacement pump and allows the displacement mechanism to be manually operated when the electrically operated control is disabled.
Type: Grant
Filed: September 5, 1978
Issued: August 12, 1980
Assignee: Abex Corporation
Inventors: Ellis H. Born, Paul B. Wolfe, Leo H. Dillon
Patent number: 4076459
Abstract: A horsepower limiter control for an axial piston pump provides a simple adjustment for setting the maximum horsepower the pump can provide and automatically adjusts the product of working pressure and maximum pump displacement to maintain the set horsepower. The horsepower limiter control operates to reduce the displacement of the pump when working fluid pressure exceeds the setting of the sequence valve.
Type: Grant
Filed: September 14, 1976
Issued: February 28, 1978
Assignee: Abex Corporation
Inventors: Cecil E. Adams, Leo H. Dillon, Ellis H. Born, David L. Thurston
Patent number: 4056041
Abstract: A variable displacement axial piston pump has a rocker cam for controlling the output of the pump. The rocker cam is driven by a fluid motor member. A valve with a follow-up device regulates pressure fluid flow to the fluid motor member to move the rocker cam. Both the fluid motor member and a part of the follow-up device are rigidly secured to and movable with the rocker cam to provide precise positioning of the rocker cam.
Type: Grant
Filed: March 1, 1976
Issued: November 1, 1977
Assignee: ABEX Corporation
Inventors: Ellis H. Born, William H. Meisel, Alan H. Viles
Patent number: 4017219
Abstract: In a hydraulic system having a plurality of variable displacement pumps driven by a prime mover, each pump has a variable ratio input device connected to a load sensing means. Each variable ratio input device automatically reduces the displacement of its respective pump by the same proportion when the prime mover is overloaded irrespective of the displacement setting of the pump and automatically increases the displacement of its pump by the same proportion up to the set displacement when the prime mover is not overloaded.
Type: Grant
Filed: December 22, 1975
Issued: April 12, 1977
Assignee: Abex Corporation
Inventors: Ellis H. Born, David L. Thurston
Patent number: 3967541
Abstract: A variable displacement axial piston pump has a rocker cam for controlling the output of the pump. The rocker cam is driven by a fluid motor member. A valve with a follow-up device regulates pressure fluid flow to the fluid motor member to move the rocker cam. Both the fluid motor member and a part of the follow-up device are rigidly secured to and movable with the rocker cam to provide precise positioning of the rocker cam.
Type: Grant
Filed: August 2, 1974
Issued: July 6, 1976
Assignee: Abex Corporation
Inventors: Ellis H. Born, William H. Meisel, Alan H. Viles
Patent number: 3937130
Abstract: A low friction seal assembly for a fluid energy translating device seals a pair of pressure fluid chambers from one another. The assembly is mounted in a movable member of the device and has an elastic member which mechanically and hydraulically biases a seal member into engagement with the walls of the device.
Type: Grant
Filed: November 4, 1974
Issued: February 10, 1976
Assignee: Abex Corporation
Inventors: Cecil E. Adams, Ellis H. Born