Invention Grant
- Patent Title: Electric motor with a retractable shaft
- Patent Title (中): 带有伸缩轴的电动机
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Application No.: US11956526Application Date: 2007-12-14
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Publication No.: US07786633B2Publication Date: 2010-08-31
- Inventor: Martin R. Pais , Shumin Cheng , Detlef Schmidt
- Applicant: Martin R. Pais , Shumin Cheng , Detlef Schmidt
- Applicant Address: US IL Schaumburg
- Assignee: Motorola, Inc.
- Current Assignee: Motorola, Inc.
- Current Assignee Address: US IL Schaumburg
- Main IPC: H02K7/06
- IPC: H02K7/06 ; H02K7/10

Abstract:
An electric motor (100) for controlling the lateral displacement of a shaft (114) connected to a rotor (104) of the electric motor (100) is provided. The electric motor (100) includes one or more stator conductors (106) for carrying a current and one or more permanent magnets (108) to produce a magnetic field (504). The one or more stator conductors (106) interact with the magnetic field (504) when the power is applied, to purposely generate a force with an axial (Fa) and a circumferential component (Fc). The electric motor (100) includes the shaft (114) that travels along a rotor axis (506) in an axial direction when the power is applied, under an action of the axial component of the force. However, when the power is removed, the shaft (114) retracts under the action of a biasing force from a tension device (118).
Public/Granted literature
- US20080157702A1 ELECTRIC MOTOR WITH A RETRACTABLE SHAFT Public/Granted day:2008-07-03
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