Patents by Inventor Stephen D. Burdette
Stephen D. Burdette has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 4401132Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: October 17, 1980Date of Patent: August 30, 1983Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4307796Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: April 13, 1979Date of Patent: December 29, 1981Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4299300Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: April 13, 1979Date of Patent: November 10, 1981Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4284182Abstract: A crawler tractor vehicle having fluid actuated steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. The vehicle further includes a transmission operable upon supply of fluid pressure thereto and a priority valve for providing that a certain level of fluid pressure is supplied to the brake system to provide a disengagement thereof prior to fluid pressure being supplied to the transmission.Type: GrantFiled: April 13, 1979Date of Patent: August 18, 1981Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4253555Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: April 16, 1979Date of Patent: March 3, 1981Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4246992Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: February 9, 1978Date of Patent: January 27, 1981Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris
-
Patent number: 4138903Abstract: A hand control arrangement for a hydrostatic transmission having a single manually actuated control to vary the driving direction and speed of the transmission and wherein the movement of the hand control lever is limited to a predetermined path making it possible for the operator to sense various speed levels of the transmission.Type: GrantFiled: October 5, 1977Date of Patent: February 13, 1979Assignee: Massey-Ferguson Inc.Inventors: Stephen D. Burdette, Michael L. Wenning
-
Patent number: 4093048Abstract: A crawler tractor vehicle having steering clutches and associated steering brake includes a control apparatus for each clutch and brake system, including a valve made up of a valve body, and a clutch valving spool and a brake valving spool movably associated therewith. In one embodiment, the clutch valving spool and brake valving spool are identical in configuration, and are disposed in a common bore. Actuator means are associated with such clutch valving spool and brake valving spool, in one embodiment including an actuator assembly made up of a plurality of plungers movable relative to each other and relative to the valve body to provide particular movement of the clutch and brake valving spools. In another embodiment, the actuator means comprise mechanical linkage means, for providing movement of brake and clutch valving spools positioned in respective separate bores defined by the valve body.Type: GrantFiled: May 21, 1976Date of Patent: June 6, 1978Assignee: Caterpillar Tractor Co.Inventors: Gary A. Hakes, Norma G. Shook, George W. Cackley, Stephen D. Burdette, Hugh C. Morris