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:
Jul. 17, 1984
Filed:
Aug. 06, 1982
Dennis J Ulicny, Carpentersville, IL (US);
ECM Motor Co., Schaumberg, IL (US);
Abstract
An electric motor having an improved braking arrangement is disclosed. The braking arrangement includes a stop pawl armature assembly disposed coaxially upon the rotor shaft of the motor for axial movement with respect thereto in response to the magnetic field created by the stator assembly of the motor. The braking arrangement further includes a stop member disposed on the rotor shaft arranged to normally rotate therewith. The stop member functions in the nature of a slip clutch, and is adapted to cooperate with the armature assembly for effecting braking of the motor. During motor operation, the armature assembly is shifted by the magnetic field of the motor stator assembly so that a pawl portion of the armature assembly is moved out of the rotational path of a lobe portion of the stop member. When the motor is switched off, the pawl portion of the armature assembly is moved into the path of the lobe portion, and is engaged thereby. The stop member permits limited continued rotation of the motor rotor until the torque of the rotor shaft drops below the torque-carrying capacity of the stop member slip clutch, at which time the shaft stops rotating and is firmly held against continued rotation.