Radford, VA, United States
Radford, VA, United States

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Patent
Thomson Industries Inc. | Date: 2017-03-15

A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. A plurality of load bearing plates are axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. A first outer housing sleeve is effective to hold the ball retainer structure. The first outer housing sleeve includes a first interlock structure. A second outer housing sleeve is effective to hold the ball retainer structure, the second outer housing sleeve including a second interlock structure. The first interlock structure is effective to mate with the second interlock structure.


Patent
Thomson Industries Inc. | Date: 2017-03-01

A linear motion bearing assembly comprising a rolling element retainer structure and an outer housing sleeve enclosing substantially all of an exposed exterior surface of said rolling element retainer structure. A bearing block effective to enclose substantially all of an exposed exterior surface of the outer housing sleeve, the bearing block including a first bearing block segment effective to enclose a first part of the outer housing sleeve; and a second bearing block segment effective to enclose a second part of the outer housing sleeve, wherein the first bearing block segment and the second bearing block segment include first elements and second elements effective to interlock with each other when the bearing block encloses the outer housing sleeve.


Patent
Thomson Industries Inc. | Date: 2017-01-04

A secondary drive coupling may comprise at least one coupling member having a first mating portion and a second mating portion. The first mating portion is configured to engage a first section of a shaft on one side of a region of weakness of the shaft, whereas the second mating portion is configured to engage a second section of the shaft on an axially opposite side of the region of weakness. Both the first mating portion and the second mating portion are each configured to prevent rotation of the at least one coupling member about the shaft. In another embodiment, the at least one coupling member comprises a first coupling member comprising the first mating portion and a first contact surface and a separate, second coupling member comprising a second mating portion and a second contact surface that is configured to engage the first contact surface.


Patent
Thomson Industries Inc. | Date: 2015-12-01

A linear motion bearing system that includes a rolling element retainer structure having at least a portion of a plurality of open axial rolling element tracks formed therein. The rolling element tracks includes an open load-bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. Bearing rolling elements are disposed in the rolling element tracks. Load bearing outer races are axially positioned adjacent the rolling element retainer structure for receiving load from the rolling elements disposed in the load-bearing portion of the rolling element tracks. An outer housing sleeve is effective to hold the rolling element retainer structure. A rail is effective to mate with the rolling element retainer structure, the rail including at least one recess sized and shaped so as to be mateable with at least one of the bearing rolling elements.


Patent
Thomson Industries Inc | Date: 2015-03-06

A linear motion bearing assembly comprising a rolling element retainer structure and an outer housing sleeve enclosing substantially all of an exposed exterior surface of said rolling element retainer structure. A bearing block effective to enclose substantially all of an exposed exterior surface of the outer housing sleeve, the bearing block including a first bearing block segment effective to enclose a first part of the outer housing sleeve; and a second bearing block segment effective to enclose a second part of the outer housing sleeve, wherein the first bearing block segment and the second bearing block segment include first elements and second elements effective to interlock with each other when the bearing block encloses the outer housing sleeve.


Patent
Thomson Industries Inc. | Date: 2015-06-01

A linear motion bearing assembly comprising a load bearing plate structure having at least a portion of a plurality of open axial ball tracks formed therein, each of said plurality of open axial ball tracks comprised of at least two concentric ball tracks. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. At lease one load bearing plate is axially positioned adjacent said load bearing plate structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. Various outer housing sleeves are disclosed including a structure split axially and a monolithic structure.


Patent
Thomson Industries Inc. | Date: 2015-06-25

A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks including an open load-bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. At least one load bearing plate is axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load-bearing portion of the ball tracks. Various outer housing sleeves are disclosed including a structure split axially and a monolithic structure.


Patent
Thomson Industries Inc. | Date: 2015-11-06

A secondary drive coupling may comprise at least one coupling member having a first mating portion and a second mating portion. The first mating portion is configured to engage a first section of a shaft on one side of a region of weakness of the shaft, whereas the second mating portion is configured to engage a second section of the shaft on an axially opposite side of the region of weakness. Both the first mating portion and the second mating portion are each configured to prevent rotation of the at least one coupling member about the shaft. In another embodiment, the at least one coupling member comprises a first coupling member comprising the first mating portion and a first contact surface and a separate, second coupling member comprising a second mating portion and a second contact surface that is configured to engage the first contact surface.


Patent
Thomson Industries Inc. | Date: 2015-02-17

A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. A plurality of load bearing plates are axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. A first outer housing sleeve is effective to hold the ball retainer structure. The first outer housing sleeve includes a first interlock structure. A second outer housing sleeve is effective to hold the ball retainer structure, the second outer housing sleeve including a second interlock structure. The first interlock structure is effective to mate with the second interlock structure.


Patent
Thomson Industries Inc. | Date: 2014-04-01

An anti-rotation device for use in a linear actuator comprises a hollow body permitting passage of a screw therein. At least one pair of legs extends longitudinally away from the hollow body and each leg of the at least one pair includes a first key feature configured for mating or complementary engagement with a second key feature of an housing used to enclose the screw, nut and anti-rotation device. In one embodiment, each leg is configured to extend or flex radially outward relative to an outer diameter of the hollow body. In another embodiment, the second key features of the housing are substantially longitudinally uniform, whereas the first key feature of at least one of the legs includes a longitudinally non-uniform feature. These pre-loading features induce self-centering of the anti-rotation device that reduces or eliminates play between the components and noise while also improving performance of the linear actuator.

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