Patent ID: 9464477
Filing Date: 2016-10-11
CPC Classification: E06B

Claim Text:
1. A safety window grid assembly, comprising: a hollow housing having a longitudinal direction; a rotating shaft rotatably disposed in said housing and having an rotational axis extending perpendicularly to the longitudinal direction; a cord that has a first end secured to said rotating shaft, the cord being retractable and extendable relative to said rotating shaft between an extended state and a retracted state, said cord being wound on said rotating shaft with revolutions of said cord extending along the axis of said rotating shaft when said cord is in the retracted state, said cord being partly unwound from said rotating shaft when said cord is in the extended state, movement of said cord between the retracted state and the extended state causes rotation of said rotating shaft in said housing; a locking mechanism disposed on said housing, and including wherein when said locking member is in the locking position relative to said rotating shaft, a portion of said cord is clamped between said rotating shaft and said locking member such that said cord is not movable relative to said rotating shaft, and when said locking member is in the unlocking position relative to said rotating shaft, said locking member is spaced apart from said cord such that said cord is movable relative to said rotating shaft.