Patents by Inventor Robert Leeper
Robert Leeper 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).
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Patent number: 10980223Abstract: A bait bucket temporarily stores fishing bait and water within a water stable bucket component having a water-tight base and side walls and a top opening. A locking cap is removeably secured around the top opening in the bucket component and further includes a connector receiving a pivoting closing cap and a locking snap-in element that temporarily secures the pivoting closing cap to the locking cap. A handle pivotably attaches to the bucket component enabling lifting of the bait bucket.Type: GrantFiled: August 10, 2018Date of Patent: April 20, 2021Inventor: Robert Leeper
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Publication number: 20200045948Abstract: A bait bucket temporarily stores fishing bait and water within a water stable bucket component having a water-tight base and side walls and a top opening. A locking cap is removeably secured around the top opening in the bucket component and further includes a connector receiving a pivoting closing cap and a locking snap-in element that temporarily secures the pivoting closing cap to the locking cap. A handle pivotably attaches to the bucket component enabling lifting of the bait bucket.Type: ApplicationFiled: August 10, 2018Publication date: February 13, 2020Inventor: Robert Leeper
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Patent number: 6719662Abstract: A differential assembly including a rotatable casing having an axis of rotation, a selectively energized electromagnet proximal the casing, and a rotatable first clutch disposed within the casing, the first clutch placed in operative engagement with the casing in response to the electromagnet being energized. Relative rotation between the first clutch and the casing is slowed by their being in operative engagement. A rotatable clutch hub and a second clutch are disposed within the casing, and the casing and the clutch hub are rotatably coupled through engagement of the second clutch, which is operatively engaged in response to relative rotation between the first clutch and the casing being slowed. At least one rotatable pinion gear is disposed within the casing and revolves about the axis of rotation.Type: GrantFiled: May 22, 2002Date of Patent: April 13, 2004Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 6582336Abstract: A differential assembly including a rotatable casing, first and second axially moveable side gears disposed within the casing, at least one pinion gear disposed within the casing and intermeshed with the side gears, a cone clutch operatively coupled to the first side gear, the cone clutch being frictionally coupled to the casing in response to being exposed to a magnetic field, and a disc clutch having at least one clutch disc operatively coupled to the second side gear in response to axial movement of the second side gear.Type: GrantFiled: March 5, 2002Date of Patent: June 24, 2003Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper, James P. Scott
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Patent number: 6527661Abstract: A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining a brake chamber and including first and second brake elements disposed within the brake chamber, the first brake element superposed with the second brake element, the first brake element rotatably fixed relative to the casing, a quantity of magnetorheological fluid disposed within the brake chamber, the first and second brake elements in contact with the magnetorheological fluid, and a selectively energized source of magnetic flux, the magnetorheological fluid being exposed to the flux when the source is energized.Type: GrantFiled: May 10, 2001Date of Patent: March 4, 2003Assignee: Auburn Gear, Inc.Inventor: Robert Leeper
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Publication number: 20030040390Abstract: A differential assembly including a rotatable casing having an axis of rotation, a selectively energized electromagnet proximal the casing, and a rotatable first clutch disposed within the casing, the first clutch placed in operative engagement with the casing in response to the electromagnet being energized. Relative rotation between the first clutch and the casing is slowed by their being in operative engagement. A rotatable clutch hub and a second clutch are disposed within the casing, and the casing and the clutch hub are rotatably coupled through engagement of the second clutch, which is operatively engaged in response to relative rotation between the first clutch and the casing being slowed. At least one rotatable pinion gear is disposed within the casing and revolves about the axis of rotation.Type: ApplicationFiled: May 22, 2002Publication date: February 27, 2003Inventors: James L. Forrest, Robert Leeper
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Publication number: 20020132693Abstract: A differential assembly including a rotatable casing, first and second axially moveable side gears disposed within the casing, at least one pinion gear disposed within the casing and intermeshed with the side gears, a cone clutch operatively coupled to the first side gear, the cone clutch being frictionally coupled to the casing in response to being exposed to a magnetic field, and a disc clutch having at least one clutch disc operatively coupled to the second side gear in response to axial movement of the second side gear.Type: ApplicationFiled: March 5, 2002Publication date: September 19, 2002Inventors: James L. Forrest, Robert Leeper, James P. Scott
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Publication number: 20010041637Abstract: A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining a brake chamber and including first and second brake elements disposed within the brake chamber, the first brake element superposed with the second brake element, the first brake element rotatably fixed relative to the casing, a quantity of magnetorheological fluid disposed within the brake chamber, the first and second brake elements in contact with the magnetorheological fluid, and a selectively energized source of magnetic flux, the magnetorheological fluid being exposed to the flux when the source is energized.Type: ApplicationFiled: May 10, 2001Publication date: November 15, 2001Inventor: Robert Leeper
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Patent number: 6309320Abstract: An electrically actuated limited slip axle assembly for transferring torque including a housing, a clutch, a casing and an electromagnet fixedly mounted to the housing. The casing is rotatably supported on bearings within the housing. The clutch is activated in response to energization of the electromagnet to transfer torque. In a first embodiment the electromagnet is coupled to a cup portion of the bearing, whereby the electromagnet is fixedly mounted to the housing via the bearing. In a second embodiment of the axle assembly includes a bearing spacer providing the fixed mount between the housing and the electromagnet.Type: GrantFiled: January 18, 2000Date of Patent: October 30, 2001Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 6261202Abstract: A limited slip differential having at least one cone clutch element for frictionally engaging an interior surface of the rotatable differential casing. The cone clutch element has a plurality of clutch engagement surfaces which are disposed about the outside surface of the cone clutch element. Recessed areas are interposed between the clutch engagement surfaces. The total clutch engagement surface area is reduced to between 5% and 15% of the total engagement and recessed surface area of the clutch element to improve the performance of the differential at lower temperatures.Type: GrantFiled: August 12, 1999Date of Patent: July 17, 2001Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 6165095Abstract: An apparatus and method for demagnetizing a differential which has a controllable electromagnetically actuated clutch. The apparatus includes sensors and a coil connected to a control module. The sensors receive vehicle inputs to indicate various measured values such as vehicle speed, brake pressure, magnetization current provided to the differential, and the like and generates signals which are transmitted to the control module. The control module initiates a demagnetization cycle when certain conditions have been satisfied as indicated by the input signals. The control module provides a DC voltage to the coil to generate magnetic flux for demagnetizing the differential and the components of the differential. In one embodiment a single coil is provided to which is applied both magnetization and demagnetization current. In another embodiment two coils are provided, one for generating magnetization flux and the other for generating demagnetization flux.Type: GrantFiled: November 3, 1999Date of Patent: December 26, 2000Assignee: Auburn Gear, Inc.Inventors: Thomas N. Till, Robert Leeper
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Patent number: 6076644Abstract: A limited slip differential having at least one cone clutch element for frictionally engaging an interior surface of the rotatable differential casing. The cone clutch element has a plurality of clutch engagement surfaces which are disposed about the outside surface of the cone clutch element. Recessed areas are interposed between the clutch engagement surfaces.Type: GrantFiled: June 5, 1998Date of Patent: June 20, 2000Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 6019694Abstract: A controllable differential having a rotatable casing, differential gearing disposed within the rotatable casing and linking the casing with an output element disposed therein, a clutch disposed within the rotatable casing and clutch adapted to transfer torque between the rotatable casing and the output element, and an electromagnet arranged to generate a generally toroidal magnetic flux path encircling the electromagnet and magnetically forcing the clutch into engagement with the rotatable casing, the casing including a nonmagnetic portion adjacent the electromagnet, said flux path surrounding the nonmagnetic casing portion.Type: GrantFiled: February 24, 1999Date of Patent: February 1, 2000Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 5992243Abstract: A four-wheel drive transfer case including a force sensor and associated electronics for sensing the reaction forces on driven members within the transfer case, such as in association with an output shaft and its bearings. The force sensor and associated control system establish an output signal which varies depending upon the magnitude of the reaction force and yields an indication of the torque distribution between the output shafts of the transfer case. The output voltage signal is used by a torque monitoring and control system to vary and/or limit the magnitude of torque transmitted to the output shaft.Type: GrantFiled: December 21, 1996Date of Patent: November 30, 1999Assignee: Dana CorporationInventor: Robert Leeper
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Patent number: 5989147Abstract: A controllable differential having a clutch mechanism which transfers a predetermined amount of torque between a rotatable differential casing and a side gear when an initiating force is applied by an electronic actuator. A pair of sensors provide inputs to the electronic actuator which, in turn, actuates an electromagnet. A clutch mechanism is actuated by the electromagnet and applies an initiating force to the clutch mechanism to initially actuate the clutch mechanism when a predetermined relative rotational condition of the side gears is sensed. The application of the initiating force in combination with the interaction between engagement surfaces and between camming portions fully engages a clutch mechanism to transfer a predetermined controllable amount of torque.Type: GrantFiled: February 25, 1998Date of Patent: November 23, 1999Assignee: Auburn Gear, Inc.Inventors: James L. Forrest, Robert Leeper
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Patent number: 5938555Abstract: A speed sensitive limited slip differential having a sealed, self contained clutch actuator which expands and retracts as required to frictionally seat a clutch element against a surface of the differential casing. The clutch actuator comprises a housing portion and a piston portion which define two fluid chambers and a gerotor pump assembly contained therein for transferring fluid between the two fluid chambers. The gerotor pump assembly is splined to an output element to transfer fluid between the two chambers when sufficient differential rotation between the output element and the casing exists. The transfer of fluid between the two chambers results in the axial expansion of the actuator housing and the actuator piston to provide an axial force on a side gear to thereby frictionally seat the clutch element against a surface of the differential casing. The sealed, self contained feature allows the present limited slip differential to operate in a simple, reliable manner.Type: GrantFiled: February 25, 1998Date of Patent: August 17, 1999Assignee: Auburn Gear, Inc.Inventor: Robert Leeper
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Patent number: 5226860Abstract: The present invention relates to a vehicle four wheel drive torque transfer case having a friction clutch which is selectively engaged when it is desired to place the transfer case in a four wheel drive operating mode. The transfer case includes an input shaft which is connected to supply torque to a rear output shaft. A multi-disc friction clutch is connected between the input shaft and a front output shaft for supplying torque to the front output shaft. A planetary gear assembly includes a sun gear, a carrier a planet carrier connected to the input shaft, and a ring gear coupled to drive the front output shaft. The multi-disc clutch is interposed between the sun gear and the ring gear and is engaged to inhibit any rotation of the planet carrier relative to the ring gear and thereby transfer torque to the front output shaft. The planetary gear assembly functions as a .sctn.'torque multipler" and this reduces the torque capacity requirements for the clutch.Type: GrantFiled: December 31, 1991Date of Patent: July 13, 1993Assignee: Dana CorporationInventors: Ralph W. Baxter, Jr., Robert Leeper, David C. Reuter
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Patent number: 5199325Abstract: The present invention is directed to an electronic actuator for use in a vehicle transmission such as a four wheel drive transfer case. In one preferred embodiment, the transfer case includes two separate electronic actuators, a range shift actuator which is utilized to effect shifting of the transfer case between high range, neutral, and low range drive positions, and a clutch actuator which is utilized to control engagement of a clutch between two wheel drive, automatic ("on demand" four wheel drive), and "part time" four wheel drive operating modes. The range shift actuator includes a rotary electric motor coaxially mounted relative to a rear output shaft of the transfer case, and a linear screw for translating the rotational movement of the motor shaft to selective axial movement of a range shift sleeve.Type: GrantFiled: September 12, 1991Date of Patent: April 6, 1993Assignee: Dana CorporationInventors: David C. Reuter, John S. Sewell, Robert Leeper