Patents Assigned to Baldor Electric Company
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Publication number: 20110167610Abstract: A method of constructing a linear drive motor assembly is disclosed. In accordance with the method, a support plate and a platen with a plurality of teeth are provided. A honeycomb core comprising a commercially available, off-the-shelf honeycomb material is provided. The honeycomb core has a plurality of cells arranged in a planar array where the plurality of cells is defined by walls extending in planes substantially perpendicular to the planar array. The support plate is directly secured to one side of the planar array. The platen is secured directly to the other side of the planar array. A forcer having a motor stack is magnetically coupleable to the platen to form a linear drive motor.Type: ApplicationFiled: March 23, 2011Publication date: July 14, 2011Applicant: BALDOR ELECTRIC COMPANYInventor: Glenn Sterling Trammell
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Patent number: 7934307Abstract: A method of constructing a linear drive motor assembly is disclosed. In accordance with the method, a support plate and a platen with a plurality of teeth are provided. A honeycomb core comprising a commercially available, off-the-shelf honeycomb material is provided. The honeycomb core has a plurality of cells arranged in a planar array where the plurality of cells is defined by walls extending in planes substantially perpendicular to the planar array. The support plate is directly secured to one side of the planar array. The platen is secured directly to the other side of the planar array. A forcer having a motor stack is magnetically coupleable to the platen to form a linear drive motor.Type: GrantFiled: August 22, 2008Date of Patent: May 3, 2011Assignee: Baldor Electric CompanyInventor: Glenn Sterling Trammell
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Publication number: 20110072632Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a pressure loaded piston drives the sleeve from a pre-assembled position to an initial position. The initial position is determined by monitoring the pressure applied to the piston. Once the initial position has been reached, a linear indicator is used to measure the axial sleeve movement from the initial position to a final position. The system remains in place after the bearing is installed on the shaft and facilitates removal of the bearing assembly from the shaft.Type: ApplicationFiled: December 7, 2010Publication date: March 31, 2011Applicant: BALDOR ELECTRIC COMPANYInventor: William G. Hewitt
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Patent number: 7909516Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a plurality of screws point load the tapered sleeve and drive it from a pre-assembled position to an initial position. Once the initial position has been reached a plurality of fasteners then drive the sleeve from the initial position to a final position. The difference between the initial position and final position determined by the width of a removable spacer used in the mounting system. The system also incorporates a jack screw mechanism used to dismount the bearing assembly from the shaft.Type: GrantFiled: June 25, 2010Date of Patent: March 22, 2011Assignee: Baldor Electric CompanyInventors: William Gregory Hewitt, Joseph J. Maloney
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Patent number: 7880348Abstract: A method comprises providing a motor with a stator comprising a plurality of laminations stacked side to side to form a contiguous stator core with each of the laminations having a plurality of radial fins projecting outward from a periphery of the lamination, and a rotor with permanent magnets spaced about the rotor configured to synchronously magnetically couple with a rotating magnetic field in the stator. The method further comprises providing a cooling tower with a fan disposed therein having a shaft extending from a center of the fan for rotating the fan. The motor is installed in the cooling tower such that the rotor of the motor is coupled directly to the fan shaft and rotates the fan when the motor is energized during normal operation of the cooling tower.Type: GrantFiled: December 16, 2008Date of Patent: February 1, 2011Assignee: Baldor Electric CompanyInventors: Robert McElveen, William E. Martin, Stephen T. Evon
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Patent number: 7866894Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a pressure loaded piston drives the sleeve from a pre-assembled position to an initial position. The initial position is determined by monitoring the pressure applied to the piston. Once the initial position has been reached, a linear indicator is used to measure the axial sleeve movement from the initial position to a final position. The system remains in place after the bearing is installed on the shaft and facilitates removal of the bearing assembly from the shaft.Type: GrantFiled: September 25, 2006Date of Patent: January 11, 2011Assignee: Baldor Electric CompanyInventor: William G. Hewitt
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Publication number: 20100260542Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a plurality of screws point load the tapered sleeve and drive it from a pre-assembled position to an initial position. Once the initial position has been reached a plurality of fasteners then drive the sleeve from the initial position to a final position. The difference between the initial position and final position determined by the width of a removable spacer used in the mounting system. The system also incorporates a jack screw mechanism used to dismount the bearing assembly from the shaft.Type: ApplicationFiled: June 25, 2010Publication date: October 14, 2010Applicant: BALDOR ELECTRIC COMPANYInventors: William Gregory Hewitt, Joseph J. Maloney
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Patent number: 7788786Abstract: A mounting system is disclosed for mounting a bearing assembly or other mechanical element to a shaft. The mounting system uses a tapered sleeve mechanism to secure the bearing assembly on the shaft. Specifically, a plurality of screws point load the tapered sleeve and drive it from a pre-assembled position to an initial position. Once the initial position has been reached a plurality of fasteners then drive the sleeve from the initial position to a final position. The difference between the initial position and final position determined by the width of a removable spacer used in the mounting system. The system also incorporates a jack screw mechanism used to dismount the bearing assembly from the shaft.Type: GrantFiled: September 5, 2006Date of Patent: September 7, 2010Assignee: Baldor Electric CompanyInventors: William Gregory Hewitt, Joseph J. Maloney
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Publication number: 20100043204Abstract: A method of constructing a linear drive motor assembly is disclosed. In accordance with the method, a support plate and a platen with a plurality of teeth are provided. A honeycomb core comprising a commercially available, off-the-shelf honeycomb material is provided. The honeycomb core has a plurality of cells arranged in a planar array where the plurality of cells is defined by walls extending in planes substantially perpendicular to the planar array. The support plate is directly secured to one side of the planar array. The platen is secured directly to the other side of the planar array. A forcer having a motor stack is magnetically coupleable to the platen to form a linear drive motor.Type: ApplicationFiled: August 22, 2008Publication date: February 25, 2010Applicant: BALDOR ELECTRIC COMPANYInventor: Glenn Sterling Trammell
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Patent number: 7566997Abstract: A linear motor device has a gas bearing and comprises a platen and a motor stack with a bottom face positionable above the platen. The motor stack has a bottom face with a recessed gas pocket. The linear motor gas bearing has a gas introduced from the motor stack into the recess pocket and flowing between the platen and the bottom face of the stack.Type: GrantFiled: March 30, 2007Date of Patent: July 28, 2009Assignee: Baldor Electric CompanyInventor: Glenn Sterling Trammell
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Patent number: 7230355Abstract: An improved linear hybrid brushless servo motor is disclosed. The motor comprises a forcer and a platen. The forcer has a plurality of stacks, permanent magnets, and coils which form a three-phase motor. The platen has a low cost ferromagnetic steel plate. The stacks, permanent magnets and phase coils of the forcer are specially designed to have the optimal electromagnetic coupling between the forcer and platen to achieve a high force density servomotor. In one embodiment, two E-shaped stacks are used to physically couple two phases to substantially minimize the unexpected cogging force and force ripple. Three other forcer configurations which achieve a three-phase, highly cost effective and high force density linear hybrid brushless servo motor are also disclosed.Type: GrantFiled: December 21, 2004Date of Patent: June 12, 2007Assignee: Baldor Electric CompanyInventors: Huai Lin, John Andrew Heilig
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Patent number: 7078848Abstract: A positioner for positioning an object with sub-micron resolution is disclosed. The positioner includes a first stage having a first stage housing and adapted to provide dual-axis motion for coarse positioning of the object, and a second stage secured substantially within the first stage housing and adapted to provide dual-axis motion for fine positioning of the object. The second stage comprises a second stage housing on which the object may be removably secured. The first stage is preferably a stepper motor or servo motor and the second stage is a piezoelectric actuator. The first stage housing preferably includes air bearings positioned on a surface thereof.Type: GrantFiled: October 4, 2004Date of Patent: July 18, 2006Assignee: Baldor Electric CompanyInventors: John Andrew Heilig, Bahram Berj Kafai, Glenn Sterling Trammell
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Patent number: 6891291Abstract: A fan for an electrical machine having discrete fan blades mounted for rotation with the machine rotor. Each blade has a unitary mounting plate and is secured to the machine rotor or to a carrier on the rotor shaft. The preferred blade has a concave surface facing axially of the rotor in one direction and a convex surface facing axially of the rotor in the other direction. The concave/convex surfaces are formed by two flat triangular surfaces joined along a common edge. The triangular structure is fatigue resistant, reducing, the likelihood of mechanical failure.Type: GrantFiled: September 11, 2002Date of Patent: May 10, 2005Assignee: Baldor Electric CompanyInventor: Peter R. Weihsmann
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Patent number: 6888289Abstract: A positioner for positioning an object with sub-micron resolution is disclosed. The positioner includes a first stage having a first stage housing and adapted to provide dual-axis motion for coarse positioning of the object, and a second stage secured substantially within the first stage housing and adapted to provide dual-axis motion for fine positioning of the object. The second stage comprises a second stage housing on which the object may be removably secured. The first stage is preferably a stepper motor or servo motor and the second stage is a piezoelectric actuator. The first stage housing preferably includes air bearings positioned on a surface thereof.Type: GrantFiled: July 16, 2002Date of Patent: May 3, 2005Assignee: Baldor Electric CompanyInventors: John Andrew Heilig, Bahram Berj Kafai, Glenn Sterling Trammell
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Patent number: 6861936Abstract: A system and method for reducing harmonics in a circuit is disclosed. The system comprises a main rectifier, ( n 3 - 1 ) auxiliary rectifiers connected to the main rectifier, and an autotransformer connected to both the main rectifier and the auxiliary rectifiers which provides 2n-pulse rectification where n equals the number of phases of the system. The autotransformer generates ( n 3 - 1 ) auxiliary voltage sets, each auxiliary voltage set having an auxiliary voltage amplitude, k, and an auxiliary voltage phase, ?, wherein k = 4 + 2 ? 3 ? cos ? ( ? - 7 ? ? 6 ) and wherein ? = sin - 1 ? ( 3 ? sin ? ? ? ? - 0.5 k ) assuming a main voltage amplitude of one and a main voltage phase of ninety degrees, wherein ? = 180 ? ° n and its integral multiples for all possible real values of k.Type: GrantFiled: February 7, 2002Date of Patent: March 1, 2005Assignee: Baldor Electric CompanyInventor: Girish Radhakrishna Kamath
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Publication number: 20040063357Abstract: A two piece power plug housing for an electric machine has base and cover members hinged together forming an enclosure for the machine leads and male terminals. The leads and terminals are held in position in recesses in the housing and may be repositioned by opening the housing. Neck elements on the base and cover form a cylindrical neck inserted in the hole of the machine band to mount the housing.Type: ApplicationFiled: October 1, 2002Publication date: April 1, 2004Applicant: Baldor Electric CompanyInventors: William M. Byrne, David M. Burns
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Patent number: 6498736Abstract: A system and method for reducing harmonics in a circuit is disclosed. The system comprises a main rectifier, ( n 3 - 1 ) auxiliary rectifiers connected to the main rectifier, and an autotransformer connected to both the main rectifier and the auxiliary rectifiers which provides 2n-pulse rectification where n equals the number of phases of the system.Type: GrantFiled: March 27, 2001Date of Patent: December 24, 2002Assignee: Baldor Electric CompanyInventor: Girish Radhakrishna Kamath
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Patent number: 6386322Abstract: A walking beam pumping system is disclosed wherein the pumping system's prime mover is gravity. In one embodiment, the system comprises a walking beam pivotally coupled to a support structure at a pivot point substantially central along the length of the walking beam. A counterbalance weight is disposed along the length of the walking beam. A position device is provided for moving the counterbalance weight along at least a portion of the length of the walking beam. As the counterbalance weight moves along the length of the walking beam, the beam's center of gravity is modulated. By modulating the position of the counterbalance weight in an appropriate manner, the walking beam is caused to pivot back and forth with respect to the support structure. A pumping assembly, for example a sucker rod string, is attached to one end of the walking beam, such that as the walking beam pivots back and forth, the pumping system is actuated to pump fluid out of, for example, an oil well bore.Type: GrantFiled: March 22, 2000Date of Patent: May 14, 2002Assignee: Baldor Electric CompanyInventor: James McCormick
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Patent number: D624015Type: GrantFiled: December 17, 2008Date of Patent: September 21, 2010Assignee: Baldor Electric CompanyInventors: Adam Walker, William E. Martin, Andreas A. Meyers
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Patent number: D636862Type: GrantFiled: December 16, 2008Date of Patent: April 26, 2011Assignee: Baldor Electric CompanyInventors: Robert McElveen, William E. Martin, Stephen T. Evon