Window fastener
AssigneeInterlock Group Limited
InventorHoward John Fountaine
Life of this patent
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Abstract
A fastener for use with a sliding sash window. The fastener has a body (11) with a handle (14) mounted with the body for pivotal movement about a pivot axle (17). A latch tongue (18) is operatively coupled to the handle (14). A latch plate (21) has a latching surface (23) which is engageable in face to face contact with the end of the latch tongue (18). The latching surface (23) is spaced from the pivot axle (17) in the direction in which a sash (S) of a window is movable from a closed position relative to the frame (F) of the window. The handle (14) is movable about the pivot axle (17) to move the end of the latch tongue (18) away from its latching contact with the latching surface (23) of latch plate (21) to permit the window sash (S) to move from the closed position.
Claims19
A fastener for a sliding sash window, the fastener comprising:
- a body, a cover removably fitted to said body, a handle pivotally mounted with said body to be movable between first and second positions, two latching means operatively coupled to said handle, biasing means to bias the handle to said first position, a latch plate having latching surfaces with each of which one of said latching means is engageable substantially face to face and an abutment adjacent the latching surfaces, the latching means being movable from engagement with the latching surface to a non-latching position in response to the handle being moved to said second position, movement inducing means to cause the latching means to move to said non-latching position in response to relative movement between the body and latch plate in a closing direction corresponding to that in which a window to which the fastener is attached moves to a closed position, the latching surface being located forward of the axis of pivotal movement of the handle in a direction opposite to said closing direction, and located at an incline relative to said closing direction.
A fastener for a window having a sash movable in a sliding direction between open and closed positions, the fastener comprising:
- a body, a handle pivotally mounted with the body, a pair of spaced apart latching tongues coupled to the handles, a latching plate having two spaced apart latching surfaces with each of which an engagement surface of one of said latching tongues is engageable when the fastener is in a latching position, all abutment means located between the latching surfaces, each latching surface being located at an angle to the sliding direction whereby the handle is pivotally movable to move said latching tongues from said latching position to a non-latching position where the latching tongues are clear of the latching plate, there being biasing means to bias the latching tongues to said latching position, and movement inducing means engageable with the latching tongues as the body is moved relative to the latch plate along the sliding direction to the closed position to cause the latching tongues to move against the bias of biasing means, said latching tongues being movable under the effect of the movement inducing means independent of the handle.
A fastener for a window having a sash movable in a sliding direction between open and closed positions, the fastener comprising:
- a body, a handle pivotally mounted with the body, a pair of latching tongues operable to the handle, a latching plate having a pair of latching surfaces with each of which an engagement surface of a latching tongue is engageable when the fastener is in a latching position, the latching surface being located at an angle to the sliding direction whereby the handle is pivotally movable to move said latching tongues from said latching position to a non-latching position where the latching tongues are clear of the latching plate, and biasing means to bias the latching tongues to said latching position, said latching tongues being mounted on the body to be movable independent of one another against the bias of said biasing means.
Dependencies are inferred from the claim text.