US 4,379,576 AGranted

Sliding closure security system

OwnerLeVone A. Blough, David L. Gregoryinventors

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Abstract

Apparatus for securing sliding closures such as patio doors, the invention includes two cooperating structural elements carried one each by the respective sliding closures and which either allow or prevent relative movement between the closures. A first structural element carried by one of the closures is substantially disposed within the usual recess defined by the mating of a glass member with framing structure. A second structural element is pivotally mounted on an edge surface of framing structure of the other of the closures oppositely to and in alignment with the first structural element, the second structural element being pivoted into cooperating position relative to the first structural element to block relative sliding movement of the closures. The invention further includes block members fixed to upper edges of the closures between the closures and upper tracks within which the closures move, the block members preventing the lifting of the closures out of the track and thereby cooperating with the aforesaid element to secure the sliding closures.

Claims15

Dependent claims

A locking system for securing sliding closures which move within tracks and wherein at least one of the sliding closures comprises a glass patio door formed of a glass pane and a frame mounting the pane to form a recess defined by the pane and peripheral edge surfaces of the frame bounding said pane, comprising:

locking means attached to the closures for preventing relative movement therebetween when in an operative configuration and for allowing relative movement between the sliding closures when in an inoperative configuration, the locking means comprising a stationary locking element mounted to a face of one of the closures and a pivotable stop element mounted to a leading edge of the other closure, the stop element being pivotable to a blocking relationship with the stationary locking element to prevent movement between the closures, the stationary locking element further comprising a U-shaped portion and a flange portion extending vertically from a first leg of the U-shaped portion when the stationary locking element is disposed with the longitudinal axis thereof in a vertical orientation, the U-shaped portion fitting into the recess contiguous to lower horizontal peripheral edge surfaces of the frame and being spaced from vertical peripheral edge surfaces of the frame, and means for mounting the stationary mounting element to the frame;
and,
blocking means disposed upon upper horizontal frame surfaces of the closures between said closures and the tracks for preventing the closures from being lifted out of the tracks.

A locking mechanism for securing sliding closures such as patio doors which move within tracks and wherein at least one of the doors is formed of a glass pane and a frame mounting the pane to form a recess defined by the pane and peripheral edge surfaces of the frame bounding said pane, the locking mechanism comprising:

a stationary locking element mounted to a face of one of the closures;
and,
a pivotable stop element mounted to the leading edge of the other closure, the stop element being pivotable to a blocking relationship with the stationary element to prevent movement between the closures, the stationary locking element comprising a U-shaped portion and a flange portion extending vertically from a first leg of the U-shaped portion when the stationary locking element is disposed with the longitudinal axis thereof in a vertical orientation, the U-shaped portion fitting into the recess contiguous to the lower horizontal peripheral edge surfaces of the frame and being spaced from vertical peripheral edge surfaces of the frame, a second free leg of the U-shaped portion being disposed substantially in a horizontal orientation when mounted to the door, the free leg having an aperture formed therein, the stop element being formed of a planar base portion mounted contiguously and pivotally to the leading edge of the other closure, the stop element further having a planar flange which is disposed perpendicularly relative to the inner base portion and extending outwardly thereof, an inner end of the base portion fitting between the stationary locking element and the vertical peripheral edge surface of the frame from which the stationary locking element is spaced, thereby to bias against the stationary locking element and block relative movement between the closures, the planar flange of the stop element fitting over the free leg of the stationary locking element when said stop element is pivoted into a locking relationship with the stationary locking element, the planar flange having an aperture formed therein which aligns with the aperture formed in the free leg to allow receipt of a padlock or similar element thereinto to further lock the sliding closures.

Dependencies are inferred from the claim text.