The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1980
Filed:
Aug. 04, 1978
John A Calvert, New Market, AL (US);
Abstract
A drive system characterized by a base supporting a pair of pillars arranged in spaced parallelism, a shaft extended between and supported by the pillars for rotation about the longitudinal axis thereof, a worm gear affixed to the shaft and supported thereby in coaxial relation therewith. A bearing housing of a sleeve-like configuration is concentrically related to the shaft and is supported thereby for free rotation with respect thereto. A first and a second normally quiescent drive train, alternatively activatable, is provided for imparting rotation into said bearing housing. Each of the drive trains is characterized by a selectively energizable motor connected to a spur gear, a worm meshed with said worm gear and adapted to be driven by said spur gear, the motor of the first drive train being supported by said bearing housing in fixed relation therewith while the motor of the second drive train being mounted in fixed relation with the base, each gear train being adapted to simultaneously restrain said worm gear against rotation, independently of the other gear train, whereby the worm of each drive train is adapted to freeze the worm gear against motion, relative thereto, while the worm of the other drive train advances with respect to the worm gear for imparting rotation to the bearing housing.