发明授权
- 专利标题: Pneumatic door-operating arrangement
- 专利标题(中): 气动门操作装置
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申请号: US507820申请日: 1983-06-27
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公开(公告)号: US4523513A公开(公告)日: 1985-06-18
- 发明人: Wolfgang Gudat , Alfred Klatt , Gunter Sebesta
- 申请人: Wolfgang Gudat , Alfred Klatt , Gunter Sebesta
- 申请人地址: DEX Hanover
- 专利权人: WABCO Westinghouse Fahrzeugbremsen GmbH
- 当前专利权人: WABCO Westinghouse Fahrzeugbremsen GmbH
- 当前专利权人地址: DEX Hanover
- 优先权: DEX3225536 19820708
- 主分类号: E05F15/50
- IPC分类号: E05F15/50 ; F15B11/10 ; E05F15/02 ; F15B13/043
摘要:
A pneumatic door control equipped with a door control valve for operating a door drive to an open or a closed position. The door control valve has an opening and a closing solenoid-operated pilot valve and an opening and closing spool valve, each operable to a passage or a vent position. A shuttle valve is part of the control valve and works in conjunction with an operator-controlled emergency valve to vent both spool valves simultaneously. A differential pressure switch is connected to the door drive to sense abnormal pressure expended in a door-opening or closing movement. Such an occurrence will output a signal to an electronic switching device which also monitors, via limit switches, whether a door is fully opened or fully closed. If excess pressure occurs during a door-closing movement, the switching device will trigger the control valve to reverse to the opening position. If excess pressure occurs during an opening movement, the switching device triggers both solenoid-operated pilot valves simultaneously. The control valve has a non-return valve which recognizes the dual triggering condition and outputs to the shuttle valve so that the two spool valves can be vented simultaneously. A throttle valve is disposed between the emergency valve and control valve for restricting the flow of pressurized air following an emergency condition.
公开/授权文献
- US5091917A Method and apparatus for pulse sorting 公开/授权日:1992-02-25
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