초록 ▼

A window lock having plural ramped keepers for a window sash and plural rollers movably associated with a slider mountable on a window frame to provide multi-point locking. The ramped keepers are constructed and related to enable delayed lock-up of one roller and ramped keeper relative to the other

A window lock having plural ramped keepers for a window sash and plural rollers movably associated with a slider mountable on a window frame to provide multi-point locking. The ramped keepers are constructed and related to enable delayed lock-up of one roller and ramped keeper relative to the other in order to assure locking of racked or warped windows. A roller and associated ramped keeper are bevelled to counteract any flexibility that might be encountered in a flexible window, such as a window made of vinyl. The actuating mechanism provides for toggle positioning of the rotatable actuating handle and associated drive link to prevent movement of the lock mechanism by outside forces other than the handle. One or more tie bars, each having a roller, can be associated with the slider to provide for variation in the number of locking points and with further variations being achieved by the length of the tie bars as well as the number of rollers mounted thereon.

대표청구항 ▼

A window lock for a window having a window frame and a movable window sash comprising, a slider having a cam member, a ramped keeper, and means for moving the slider in a path extending lengthwise thereof to cause the cam member to coact with the ramped keeper in establishing either a locked or unlo

A window lock for a window having a window frame and a movable window sash comprising, a slider having a cam member, a ramped keeper, and means for moving the slider in a path extending lengthwise thereof to cause the cam member to coact with the ramped keeper in establishing either a locked or unlocked condition of the window; the improvement comprising: multi-point locking of the window sash to the window frame by utilization of at least two of said ramped keepers and two of said cam members, each of said ramped keepers having an inclined ramp section and a generally planar section, and said slider having a length of movement along said path greater than that required to move a cam member along said ramp section and onto a planar section of a ramped keeper whereby delayed lock-up of one cam member and associated ramped keeper may be achieved relative to the other cam member and ramped keeper by having said ramped keepers at a distance apart greater than the distance between said cam members, and a planar section of a ramped keeper having a length greater than said difference in distances.