US 5,791,700 AGranted

Locking system for a window

AssigneeWinchester Industries, Inc.

InventorAlexander J. Biro

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Abstract

A locking system for a window sash comprises a lock handle assembly, reciprocating rod members connected to the lock handle assembly, and rotatable cam assemblies connected to the rod members. Each cam assembly has a cam element which upon reciprocation of its respective rod element moves into and out of a cam keeper which is mounted on an adjacent window sash. Each rod member has a rod tip which moves into and out of a channel provided in the window frame. In a first operation of the lock handle assembly, the rod members are reciprocated inwardly to rotate the cam elements out of their respective cam keeper and to move the rod tips partially out of the frame channels which allows the window sash to be moved vertically within the channels. A further operation of the lock handle assembly moves the rod tips entirely out of the channels to allow the window sash to be tilted.

Claims50

Dependent claims

A window assembly comprising:

a frame including at least one retaining member;
a first window sash slidably mounted in the frame;
a second window sash slidably mounted in the frame;
at least one rotatable locking member mounted on the first window sash and moveable to:
(1) a locked position in engagement with the second window sash;
and (2) an unlocked position disengaged from the second window sash;
at least one reciprocating locking member mounted on the first window sash and moveable to:
(1) an extended position in locking engagement with the at least one retaining member of the frame resisting the first window sash from sliding in the frame;
(2) a partially retracted position allowing the first window sash to slide in the frame;
and (3) a fully retracted position allowing the first window sash to tilt out of the frame;
and
a lock handle assembly mounted on the first window sash, connected to the at least one rotatable locking member and the at least one reciprocating locking member, and moveable to:
(1) a fully locked position wherein the at least one rotatable locking member is in the locked position and the at least one reciprocating locking member is in the extended position;
(2) a sliding position wherein the at least one rotatable locking member is in the unlocked position and the at least one reciprocating locking member is in the partially retracted position;
and (3) a tilt position wherein the at least one rotatable locking member is in the unlocked position and the at least one reciprocating locking member is in the fully retracted position.

12 more elements

Dependencies are inferred from the claim text.