Invention Grant
- Patent Title: Safety control system for an electromagnetic door lock of an electric household appliance
- Patent Title (中): 家用电器电磁门锁的安全控制系统
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Application No.: US13132867Application Date: 2009-12-04
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Publication No.: US08952577B2Publication Date: 2015-02-10
- Inventor: Berginc Bostjan
- Applicant: Berginc Bostjan
- Applicant Address: US IL Glenview
- Assignee: Illinois Tool Works Inc.
- Current Assignee: Illinois Tool Works Inc.
- Current Assignee Address: US IL Glenview
- Agency: Lowe Hauptman & Ham LLP
- Priority: ITTO2008A0905 20081205
- International Application: PCT/US2009/066731 WO 20091204
- International Announcement: WO2010/065828 WO 20100610
- Main IPC: H02H11/00
- IPC: H02H11/00 ; D06F37/42 ; A47L15/42 ; D06F39/14

Abstract:
A safety control system for an electromagnetic door lock of an electric household appliance, wherein a blocking pawl is controlled by the movement of a core of an electromagnet, including a supplying circuit of a coil of the electromagnet, power supplying means to supply electric pulses in the circuit for energizing the coil and a PTC element arranged in series in the circuit; wherein power supplying means are of the type adapted to generate first pulses for taking the pawl to a blocking position and second pulses, having a polarity opposite to the first, for taking the pawl to a releasing position; and including means for determining, according to the parameters of an operating cycle of the electric household appliance, the emission of at least one train of first pulses by the power supplying means, so as to produce the heating of the PTC element.
Public/Granted literature
- US20110239711A1 SAFETY CONTROL SYSTEM FOR AN ELECTROMAGNETIC DOOR LOCK OF AN ELECTRIC HOUSEHOLD APPLIANCE Public/Granted day:2011-10-06
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