Patents Represented by Attorney Frederick L. Tolhurst
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Patent number: 4538633Abstract: An optical hydraulic control wherein the flow of hydraulic fluid is controlled by movement of a valve spool 12. Movement of the valve spool is initiated by a hydraulic pressure differential that is established by moving a control member 34 out of an equilibrium position. Movement of the control member from its equilibrium position is accomplished by illumination of a beam support structure 36 with an optical command signal. The control member 34 is returned to its equilibrium position after appropriate movement of a valve spool 12 by mechanical linkage between control member 34 and valve spool 12 or, alternatively, by modulation of the optical command signal.Type: GrantFiled: February 18, 1983Date of Patent: September 3, 1985Assignee: Parker-Hannifin CorporationInventor: Curtis E. Stevens
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Patent number: 4525695Abstract: A direct drive valve wherein a force motor (10) controls the position of a valve slide (20) through a linkage (14). The force motor includes a spring assembly (62) having cantilevered springs (68 and 70) that include petals (72). The armature (48) of the force motor is guided by a plurality of balls (84) that contact both an internal tube assembly (47) and the armature.Type: GrantFiled: April 4, 1984Date of Patent: June 25, 1985Assignee: Parker Hannifin CorporationInventors: Shih Y. Sheng, Ray A. York
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Patent number: 4523797Abstract: An adaptor for modifying connector arrangements of electrical components in which connectors such as terminals (16) that are electrically connected to a component (14) are located according to apertures (36-40). The terminals, which are already fastened to the conductor, are laterally received into the aperture through channels (42-46) and slots (66-70). Shoulders (48-52) support terminals (16) above the adaptor face (26) and grooves (54-58) determine the angular orientation of the terminals.Type: GrantFiled: March 9, 1983Date of Patent: June 18, 1985Assignee: Parker Hannifin CorporationInventor: Samuel Kimmelman
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Patent number: 4506418Abstract: A muffler clamp wherein a retainer (22) is secured to a bracket (20) by nuts (24 and 26). The bracket (22) is provided with sections (38) and the retainer (22) has a flexible central region (40) such that the clamp can be tightly constricted about and secure exhaust system components in a range of sizes.Type: GrantFiled: December 20, 1982Date of Patent: March 26, 1985Assignee: Parker-Hannifin CorporationInventors: Frank J. Viola, Anthony Scaduto
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Patent number: 4504066Abstract: In order, in such a seal, consisting of a softer solid ring (50) and a harder flange ring (52), to improve its springing distance and to prevent the passage of lubricant and/or dirt, it is proposed that the solid ring (50) be clamped axially between the bottom surface (36) of a depression (12) receiving the seal, in a chain sprocket (18), taking part in the forming of the link, and a flange ring (52) flange (64) lying against a sprocket end surface (42), lying opposite the bottom surface (36), which (64), lies broadly, by an end surface (68), divided by a ring groove (66), running around a link bolt (22), against the sprocket end surface (42); and that the solid ring (50) is supported radially outward by a flange ring (52) flange (62) lying against the ring-form boundary surface (40) of the depression (12), while the flange ring (52) has a substantially L-shaped profile and a slight distance from the bottom surface (36) of the depression (12), and occupies a pressure seating in the cylindrical boundary surfacType: GrantFiled: June 11, 1984Date of Patent: March 12, 1985Assignee: Parker-Hannifin CorporationInventor: Ernst Horl
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Patent number: 4504816Abstract: A blade fuse includes parallel blades (12 and 14) secured in a body (16). A fusible link (42) welded to the blades is located in a cavity (20) of the body that is covered by a window (61). The blade fuses are assembled by blanking the fusible element from a ribbon (90) and translating it into a fuse subassembly (64). Tabs (50 and 52) secure the fusible element in the subassembly (64) until it is spot welded to blades 12 and 14. The window (61) is then blanked and translated to cover cavity (20) and secured by ultrasonic welding. A connector strip (76) is then blanked from between blades (12 and 14) to provide the blade fuse.Type: GrantFiled: October 31, 1983Date of Patent: March 12, 1985Assignee: Parker-Hannifin CorporationInventors: Frank J. Viola, Erwin L. Schaub, Lawrence H. Burke
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Patent number: 4468221Abstract: An extracorporeal medication infusion device provides a precise infusion rate of a liquid medication into a human or animal body. The infusion device includes a permanent portion which has a case, a battery, a programmable electronic controller, and an electromagnetic solenoid core and solenoid coil for providing an actuation force. The infusion device also includes a disposable portion which includes a reservoir filled with a liquid medication that is to be dispensed and a pump for pumping the medication from the reservoir into the user's body. The pump includes a pump chamber and a piston connected to an electromagnetic armature for altering the volume of the pump chamber in response to the actuation force.Type: GrantFiled: July 20, 1983Date of Patent: August 28, 1984Assignee: Parker-Hannifin CorporationInventor: William B. Mayfield
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Patent number: 4451955Abstract: A crimp-type hose clamp wherein the ends of the clamp are joined in a double-layered top portion of the hat section of the clamp.Type: GrantFiled: September 23, 1983Date of Patent: June 5, 1984Assignee: Parker-Hannifin CorporationInventors: Peter W. Kern, James J. Richter
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Patent number: 4447234Abstract: An extracorporeal medication infusion device provides a precise infusion rate of a liquid medication into a human or animal body. The infusion device includes a permanent portion which has a case, a battery, a programmable electronic controller, and an electromagnetic solenoid core and solenoid coil for providing an actuation force. The infusion device also includes a disposable portion which includes a reservoir filled with a liquid medication that is to be dispensed and a pump for pumping the medication from the reservoir into the user's body. The pump includes a pump chamber and a piston connected to an electromagnetic armature for altering the volume of the pump chamber in response to the actuation force.Type: GrantFiled: August 2, 1982Date of Patent: May 8, 1984Assignee: Parker-Hannifin CorporationInventor: William B. Mayfield
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Patent number: 4447233Abstract: An extracorporeal medication infusion device provides a precise infusion rate of a liquid medication into a human or animal body. The infusion device includes a permanent portion which has a case, a battery, a programmable electronic controller, and an electromagnetic solenoid core and solenoid coil for providing an actuation force. The infusion device also includes a disposable portion which includes a reservoir filled with a liquid medication that is to be dispensed and a pump for pumping the medication from the reservoir into the user's body. The pump includes a pump chamber and a piston connected to an electromagnetic armature for altering the volume of the pump chamber in response to the actuation force.Type: GrantFiled: July 30, 1982Date of Patent: May 8, 1984Assignee: Parker-Hannifin CorporationInventor: William B. Mayfield
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Patent number: 4445535Abstract: An extracorporeal medication infusion device provides a precise infusion rate of a liquid medication into a human or animal body. The infusion device includes a permanent portion which has a case, a battery, a programmable electronic controller, and an electromagnetic solenoid core and solenoid coil for providing an actuation force. The infusion device also includes a disposable portion which includes a reservoir filled with a liquid medication that is to be dispensed and a pump for pumping the medication from the reservoir into the user's body. The pump includes a pump chamber and a piston connected to an electromagnetic armature for altering the volume of the pump chamber in response to the actuation force.Type: GrantFiled: August 2, 1982Date of Patent: May 1, 1984Assignee: Parker-Hannifin CorporationInventor: William B. Mayfield
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Patent number: 4351226Abstract: A fluid control system includes a fluid motor 11, a control valve 12 for directing fluid flow to and from the motor 11, and a control valve actuator 14 for operating the control valve 12. The control valve actuator 14 includes an actuator member 32, a feedback member 44, and a spring 46 which exerts a force on the actuator member 32 whose magnitude varies with the relative positions of the actuator member 32 and the feedback member 44. A command pressure signal moves the actuator member 32 to operate the control valve 12 in order to direct fluid flow to and from the fluid motor 11. A feedback link 41 connects the feedback member 44 to the fluid motor 11. The actuator piston 32 is slidably carried on the feedback member 44, so that any drifting of the fluid motor 11 results in immediate movement of the actuator member 32 and control valve 12 to correct the drifting.Type: GrantFiled: May 27, 1980Date of Patent: September 28, 1982Assignee: Parker-Hannifin CorporationInventor: Luc P. Cyrot