Title:
電気モーター駆動ドロップボルト
Document Type and Number:
Japanese Patent JP4210624
Kind Code:
B2
Abstract:
There is an electric motor driven drop bolt having a housing which in use is mounted into a doorway frame and has the bolt pivotal therein by a mechanical drive set in a cage disposed at an operative position. The bolt is pivotal between a locking configuration where the bolt extends outward of the housing to engage in an aperture associated with a door within the frame and an unlocked configuration where the bolt is withdrawn to clear the aperture. The mechanical drive includes a screw shaft rotatable by the electric motor to move a roller nut along the length of the shaft whilst engaging a cam surface on the bolt. To obtain fail safe operation of the drop bolt the cage is slidable in the housing from the operative position to a disengaged position so that the bolt is movable from the locking configuration to the unlocked configuration without operation of the mechanical drive.
More Like This:
Inventors:
Graham James Rooker
Application Number:
JP2004116703A
Publication Date:
January 21, 2009
Filing Date:
April 12, 2004
Export Citation:
Assignee:
Trimec Technology Proprietary Limited
International Classes:
E05B47/00; E05B47/02; E05B47/06; E05B63/00; E05B15/02; E05B17/00
Domestic Patent References:
| JP2003074231A | ||||
| JP10061288A | ||||
| JP62049578U | ||||
| JP8093285A |
Attorney, Agent or Firm:
Ichiro Sugawara