Company Filing History:

12 out of 2,301

Emerson Electric Company

patents

1 out of 315

Nidec Motor Corporation

patents

1 out of 832,912

Other

patents

Years Active: 1992-2012

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8288913 - Exposed bar induction motor with punched-to-size air gap (2012-10-16),

2. 7709992 - Electric machine (2010-05-04),

3. 7245054 - Permanent magnet electric machine having reduced cogging torque (2007-07-17),

4. 7034423 - Electric power steering system including a permanent magnet motor (2006-04-25),

5. 6946760 - Brushless permanent magnet motor with high power density, low cogging and low vibration (2005-09-20),

6. 6727623 - Reduced impedance interior permanent magnet machine (2004-04-27),

7. 6717314 - Interior permanent magnet motor for use in washing machines (2004-04-06),

8. 6707209 - Reduced cogging torque permanent magnet electric machine with rotor having offset sections (2004-03-16),

9. 6597078 - Electric power steering system including a permanent magnet motor (2003-07-22),

10. 5696416 - Mounting of motor for refrigeration (1997-12-09),

11. 5532534 - Brushless permanent magnet condenser motor for refrigeration (1996-07-02),

12. 5177054 - Flux trapped superconductor motor and method therefor (1993-01-05),

13. 5144179 - Superconducting brushless homopolar motor with multiple winding rotor (1992-09-01),

14. 5138207 - Flux trapped superconductor sychronous motor with creep compensation (1992-08-11),

Title: Alan D Crapo: Innovator in Electric Motor Technology

Introduction

Alan D Crapo is a notable inventor based in Florissant, MO (US), recognized for his contributions to electric motor technology. With a total of 14 patents to his name, he has made significant advancements in the design and functionality of electric induction motors.

Latest Patents

Among his latest innovations is the "Exposed bar induction motor with punched-to-size air gap." This electric induction motor assembly features a rotor assembly and a stator assembly, where the rotor includes an exposed bar rotor made up of axially stacked, punched-to-size rotor laminations. The stator assembly also consists of axially stacked, punched-to-size stator laminations, with each lamination presenting an axial thickness of less than 0.024 inches. The design ensures a radially extending air gap of less than 0.012 inches between the rotor and stator assemblies.

Another significant patent is the "Electric machine," which describes a stator assembly designed for use in an electric motor. This assembly includes a stator core with an annular rim and multiple teeth extending radially inward. The stator core's dimensions are carefully engineered, with an outer diameter ranging from about 5.1 inches to about 5.9 inches and an inner diameter of less than about 3.0 inches. The assembly also features a winding made of aluminum and/or copper wrapped around at least three teeth of the stator core.

Career Highlights

Throughout his career, Alan D Crapo has worked with prominent companies, including Emerson Electric Company. His work has significantly impacted the field of electric motor technology, showcasing his innovative spirit and technical expertise.

Collaborations

Alan has collaborated with notable individuals in the industry, including Todd A Walls and Richard E Hartsfield, Jr. These collaborations have contributed to the development of advanced technologies in electric motors.

Conclusion

Alan D Crapo's contributions to electric motor technology through his patents and collaborations highlight his role as a significant innovator in the field. His work continues to influence the design and efficiency of electric motors, paving the way for future advancements.

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