Patents by Inventor Tuan Vinh Le
Tuan Vinh Le 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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Publication number: 20120318080Abstract: A torque multiplier for converting an input torque to an output torque. A torque multiplier includes a cam mounted on a drive shaft for rotation therewith when an input torque is applied to the drive shaft, the cam providing a magnetic field that is radially asymmetrical relative to the drive shaft, a first output shaft for providing an output torque, and a magnet spaced apart from the cam and mounted to move relative to the cam in response to magnetic coupling forces between the cam and the magnet as the cam rotates, the magnet being operatively connected to drive the first output shaft, wherein magnetic coupling forces between the cam and the magnet return rotational energy to the drive shaft during part of the cam rotation.Type: ApplicationFiled: January 24, 2011Publication date: December 20, 2012Applicant: L.T. Machine & Tools Inc.Inventor: Tuan Vinh Le
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Patent number: 7278248Abstract: A case sealer has a frame with a conveyor for moving boxes into a pair of spaced-apart lateral conveyors. A floating head located over the lateral conveyors folds the box end and side flaps into a closed position. A seal dispensing platform carrying a tape dispenser seals the box flaps shut.Type: GrantFiled: June 27, 2005Date of Patent: October 9, 2007Inventor: Tuan Vinh Le
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Patent number: 7269933Abstract: A case sealer has a frame with a low friction conveyor upon which boxes are moved in series through three stages, each having an independent pair of spaced-apart, lateral conveyors that are linked together for inward and outward movement to accommodate the width of the box to be sealed. A first measuring stage measures the height, width and length of the box. A second flap folding stage has a floating head located over its lateral conveyors and is responsive to the height and width of the box and folds the box end and side flaps into a closed position. When a box enters the flap folding stage, the lateral conveyors in the measuring stage open to accept the next box, and based on the speed of the lateral conveyors and the measured length of the previous box, a gate allows the next box to enter the measuring stage as soon as the previous box has cleared the measuring stage.Type: GrantFiled: May 14, 2004Date of Patent: September 18, 2007Inventor: Tuan Vinh Le
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Patent number: 6910314Abstract: A case sealer has a frame with a conveyor for moving boxes into a pair of spaced-apart lateral conveyors. The lateral conveyors have converging centering conveyor belts that center the boxes and first advancing conveyor belts that open to the width of the box to be sealed. A floating head located over the lateral conveyors folds the box end and side flaps into a closed position. The box is then picked up by a pair of second advancing conveyors that adjust to the width of the box. The second advancing conveyors are mounted on a seal dispensing platform carrying a tape dispenser for sealing the box flaps shut.Type: GrantFiled: December 30, 2002Date of Patent: June 28, 2005Inventor: Tuan Vinh Le
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Publication number: 20040226268Abstract: A case sealer has a frame with a low friction conveyor upon which boxes are moved in series through three stages, each having an independent pair of spaced-apart, lateral conveyors that are linked together for inward and outward movement to accommodate the width of the box to be sealed. A first measuring stage measures the height, width and length of the box. A second flap folding stage has a floating head located over its lateral conveyors and is responsive to the height and width of the box and folds the box end and side flaps into a closed position. When a box enters the flap folding stage, the lateral conveyors in the measuring stage open to accept the next box, and based on the speed of the lateral conveyors and the measured length of the previous box, a gate allows the next box to enter the measuring stage as soon as the previous box has cleared the measuring stage.Type: ApplicationFiled: May 14, 2004Publication date: November 18, 2004Inventor: Tuan Vinh Le
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Patent number: 6819957Abstract: An electrical stimulation device for applying electrical stimulation to living tissue, including a plurality of electrode pairs adapted to be applied along a spinal area of a person, a sensing device for sensing breathing of the person, and a controller connected to receive signals from the sensing device and control operation of the electrode pairs, the controller being configured to, based on signals received from the sensing device, cause the electrode pairs to apply stimulating electrical pulses to areas of the person to which they are respectively applied.Type: GrantFiled: August 29, 2001Date of Patent: November 16, 2004Inventor: Tuan Vinh Le
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Publication number: 20040123559Abstract: A case sealer has a frame with a conveyor for moving boxes into a pair of spaced-apart lateral conveyors. The lateral conveyors have converging centering conveyor belts that center the boxes and first advancing conveyor belts that open to the width of the box to be sealed. A floating head located over the lateral conveyors folds the box end and side flaps into a closed position. The box is then picked up a pair of second advancing conveyors that adjust to the width of the box. The second advancing conveyors are mounted on a seal dispensing platform carrying a tape dispenser for sealing the box flaps shut.Type: ApplicationFiled: December 30, 2002Publication date: July 1, 2004Inventor: Tuan Vinh Le
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Patent number: 6371279Abstract: A packaging machine is shown for individually wrapping objects, such as candies. The machine has a rotary hopper for selecting the objects to be wrapped, folding them and ejecting them precisely onto a delivery conveyor. A continuous wrapping film is laid over the objects on the delivery conveyor and the sides of the film are folded downwardly to partially wrap the objects. The objects are then gripped through the wrapping film by gripping fingers mounted on a second gripping conveyor. The gripping conveyor moves the objects along while the bottom edges of the wrapper are crimped, and the wrapper between the objects is then crimped and cut off. The gripping fingers then release the wrapped object.Type: GrantFiled: December 8, 2000Date of Patent: April 16, 2002Inventor: Tuan Vinh Le
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Publication number: 20010000594Abstract: A packaging machine is shown for individually wrapping objects, such as candies. The machine has a rotary hopper for selecting the objects to be wrapped, folding them and ejecting them precisely onto a delivery conveyor. A continuous wrapping film is laid over the objects on the delivery conveyor and the sides of the film are folded downwardly to partially wrap the objects. The objects are then gripped through the wrapping film by gripping fingers mounted on a second gripping conveyor. The gripping conveyor moves the objects along while the bottom edges of the wrapper are crimped, and the wrapper between the objects is then crimped and cut off. The gripping fingers then release the wrapped object.Type: ApplicationFiled: December 8, 2000Publication date: May 3, 2001Inventor: Tuan Vinh Le
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Patent number: 6189300Abstract: A packaging machine is shown for individually wrapping objects, such as candies. The machine has a rotary hopper for selecting the objects to be wrapped, folding them and ejecting them precisely onto a delivery conveyor. A continuous wrapping film is laid over the objects on the delivery conveyor and the sides of the film are folded downwardly to partially wrap the objects. The objects are then gripped through the wrapping film by gripping fingers mounted on a second gripping conveyor. The gripping conveyor moves the objects along while the bottom edges of the wrapper are crimped, and the wrapper between the objects is then crimped and cut off. The gripping fingers then release the wrapped object.Type: GrantFiled: August 2, 1999Date of Patent: February 20, 2001Inventor: Tuan Vinh Le
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Patent number: 6067773Abstract: A box or carton sealer is disclosed having a frame with a conveyor for moving boxes therethrough. First and second longitudinal, laterally spaced-apart, independent gravity operated centering bars move inwardly and outwardly to center the boxes in the sealer. The centering force produced by the centering bars is proportional to the distance the box is off center in the sealer. A shiftable weight assists the respective centering bars to move laterally as required. A floating head has an inclined entry ramp for riding up over the box and lifting the floating head to a desired height as the box passes thereunder. The floating head has a sealing device for attaching the box flaps at whatever height the flaps happen to be at under the floating head.Type: GrantFiled: July 15, 1997Date of Patent: May 30, 2000Assignee: 3M Innovative Properties CompanyInventor: Tuan Vinh Le
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Patent number: 5685814Abstract: A box or carton sealer is disclosed having a frame with a conveyor for moving boxes therethrough. A pair of longitudinal, laterally spaced-apart gravity operated centering bars are linked together and move inwardly and outwardly in unison to centre the boxes in the sealer. A first floating head has an inclined entry ramp for riding up over the box folding the box forward end flap inwardly. This floating head also has a pivoting arm for folding inwardly the rear end flap of the box, and diverging side bars for folding inwardly the side flaps of the box. A second floating head has an entry ramp for riding up on top of the inwardly folded flaps of the box. The second head has a tape dispenser for applying tape to the flaps at whatever height they happen to be at to tape the box shut.Type: GrantFiled: January 22, 1996Date of Patent: November 11, 1997Inventor: Tuan Vinh Le