Patent ID: 9133655
Filing Date: 2015-09-15
Classification: E05C,Y10T

Abstract:
1. A multistage lock comprising: a stationary frame being an annular framework and having an outer frame being an annular framework, mounted in and connected pivotally to the stationary frame, and having an inner frame mounted in and connected pivotally to the outer frame, and having a lock device mounted on the open stile of the outer frame and having wherein when the at least one handle is turned to allow the first outer main limiting protrusion on the outer sliding panel engaging the stopping protrusion of the outer main stop and the third inner main limiting protrusion on the inner sliding panel engaging the stopping protrusion of the inner main stop, the outer frame is closed relative to the stationary frame and the inner frame is closed relative to the outer frame; when the at least one handle is turned to allow the stopping protrusion of the outer main stop disposed between the first outer main limiting protrusion and the second outer main limiting protrusion and the fourth inner main limiting protrusion engaging the stopping protrusion of the inner main stop, the outer frame is opened relative to the stationary frame and the inner frame is closed relative to the outer frame; and when the at least one handle is turned to allow the second outer main limiting protrusion engaging the stopping protrusion of the outer main stop and the third inner main limiting protrusion departing from the stopping protrusion of the inner main stop, the outer frame is closed relative to the stationary frame and the inner frame is opened relative to the outer frame.