Electromagnetic shock absorber
Patent 3941402 Issued on March 2, 1976. Estimated Expiration Date: 
March 2, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 2, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3842753 InventorsApplicationNo. 554461 filed on 03/03/1975US Classes:280/5.514, Riding or suspension height (e.g., ground-clearance, "trim height")254/1, MISCELLANEOUS267/182, MISCELLANEOUS310/90.5Magnetic bearingExaminersPrimary: Goodman, PhilipAbstractThe present invention discloses an electromagnetic shock absorber which may be employed to prevent the bottoming of springs in autos during shock conditions, or to replace, in its entirety, a shock absorber.The present shock absorber includes two electro-magnets, the first having a fixed north-to-south field and the second having a field whose polarity is reversible dependant upon the direction of the shock which is to be absorbed or dampened. Where the undesirable shock involves a movement of the car axle toward the auto frame, the polarity of the magnet having a reversible field causes a repulsion between the two electro-magnets. Where the undesirable motion of the car axle is away from the auto frame, the field of the reversible magnet creates an attraction between the two electro-magnets.Hence, any undesirable motion of the auto axle relative to the auto frame is counteracted by virtue of the present system. | |
