Device for securing a closure such as a window

Details Device for securing a closure such as a window Device for securing a closure such as a window

E - Fixed Constructions

05

F

E05F 1/00 (2006.01) E05B 15/00 (2006.01) E05C 3/04 (2006.01) E05B 3/00 (2006.01) E05B 15/16 (2006.01)

Patent

CA 2149100

A device for securing a closure. An illustrated latching device is for releasably securing a closure such as a window. The device includes a base for mounting, typically to a pivotally mounted window frame. The base has an upstanding hollow threaded shaft. There is a handle having a downwardly depending threaded cylinder the threads mating with the threads of the shaft to permit rotation of the handle between lower and upper positions. The handle includes an abutment for abutting a surrounding window frame to preclude relative movement of the pivotal frame when the handle is in the lower position. There is a downwardly open cap of resiliently deformable material connected to a downwardly directed stem extending from an upper interior end of the cylinder and received within an interior of the hollow shaft and abutments extending radially outwardly of the cap and radially inwardly of a wall of the shaft, the abutments being located such that when the handle is in the lower position the resiliently deformable material exhibits a first stress minimum. The abutments are further located such that when the handle is in the upper position the stress of the deformable material exhibits a second stress minimum, the lower and upper positions of the handle are rotationally spaced 90 from each other, and, when the handle is rotated between the lower and upper positions, the material exhibits a stress maximum at a position rotationally intermediate the upper and lower positions of the handle.

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