GB2101199A

GB2101199A - Improvements in or relating to side-hung window hinges

Info

Publication number: GB2101199A
Application number: GB08121099A
Authority: GB
Inventors: Kenneth Gordon Griffin
Original assignee: Euromond Ltd
Current assignee: Euromond Ltd
Priority date: 1981-07-08
Filing date: 1981-07-08
Publication date: 1983-01-12
Also published as: GB2101199B

Abstract

The hinge 1 comprises a track member 2 for attachment to the top or bottom of the window frame, a slide 4 movable along the track member 2, a strut 7 pivotally connected to the track member 2 in spaced relation to the slide 4, a brace 9 pivotally connected to the slide 4 and strut 7, a link 12 pivotally connected to the slide 4, and a bar member 14 pivotally connected to the link 12 and the strut 7 for movement between a closed position in which the bar member 14 is disposed above the track member 2 and an open position in which the bar member 14 is disposed at an angle to the track member 2. A flattened sleeve 26 formed by injection moulding from a thermoplastic elastomeric material and fitted to the strut 7 adjacent a cranked portion 21 comprises a raised portion 31 defining a cambered surface over which the bar member 14 may ride when it is moved into its closed position, so as to prevent the bar member 14 from catching on the cranked portion 21 of the strut 7. <IMAGE>

Description

SPECIFICATION Improvements in or relating to side-hung window hinges This invention relates to hinges for side-hung windows, and is more particularly concerned with hinges of the type comprising a track member, a slide movable along the track member, a strut pivotally connected to the track member in spaced relation to the slide, a brace pivotally connected to the slide and the strut, a link pivotally connected to the slide, and a bar member pivotally connected to the link and the strut for movement between a closed position in which the bar member is disposed above the track member and an open position in which the bar member is disposed at an angle to the track member. Such a hinge will be referred to as "a side-hung window hinge as hereinbefore described" in the remainder of the specification.

A respective hinge is generally provided at the bottom and at the top of a side-hung window with the bar member of each hinge being secured to the bottom or top sash member and the associated track member being secured to the bottom or top frame member, so as to render the window pivotable about a vertical axis. However known hinges suffer from the disadvantage that the weight of the window acting on the bar member of the bottom hinge when the window is open tends to cause the bar member to sag so that the bar member catches on the strut when the window is moved towards the closed position, with the result that the window cannot be fully closed or can only be closed with difficulty. The invention has as its object to provide a fitment for such a hinge which overcomes this disadvantage.

According to the invention there is provided a fitment for a side-hung window hinge as hereinbefore described, comprising an element adapted to be held firmly in position on the strut and providing a cambered surface over which the bar member may ride when it is moved into its closed position.

In a preferred embodiment the element is a flattened sleeve which may be slid into position along the strut during assembly of the hinge. The sleeve may be formed so as to have a bore of internal width slightly less than the width of the strut, and the sleeve may be raised to an elevated temperature to expand and soften the material of the sleeve so that the sleeve may easily be pushed on to the strut and, on cooling, will tightly grip the strut.

The element may also provide a further cambered surface, on the opposite side of the strut to the first-mentioned cambered surface, for riding over the track member when the bar member is moved into its closed position, so as to prevent jamming due to the strut catching on the edge of the track member.

The first-mentioned cambered surface on the element may comprise two convexly curved portions separated by a flat portion intended to lie substantially parallel to the strut. Where the hinge is to be mounted on a window with the track member secured to the window frame and the bar member secured to the window sash such that there is a gap between the bar member and an internal lip on the window sash, the width of the flat portion should be greater than the width of this gap so as to prevent the element from becoming lodged in this gap.

The element is preferably formed by injection moulding from a thermoplastic elastomeric material, such as Nylon 66. Furthermore the first mentioned cambered surface may be provided on a raised portion of the element which does not extend the full length of the element.

The invention also provides a side-hung window hinge as hereinbefore described provided with such a fitment. The fitment may be disposed intermediate the region in which the strut is pivotally connected to the track member and the region in which the brace is pivotally connected to the strut, and is most preferably disposed immediately adjacent a cranked portion of the strut intermediate the cranked portion and the first-mentioned region.

In order that the invention may be more fully understood, reference will be made, by way of example, to the accompanying drawings, in which: Figure 1 is a plan view of a side-hung window hinge provided with a fitment in accordance with the invention; and Figure 2 is an enlarged perspective view of the fitment of Figure 1 removed from the hinge.

The side-hung window hinge 1 shown in Figure 1 includes a track member 2 provided with screw holes 3 for securing the track member 2 to the bottom member of the window frame, and a slide 4 slidable within a channel 5 in the track member 2 as far as a stop 6. A strut 7 is connected to the track member 2 in spaced relation to the slide 4 by a pivot pin 8.A brace 9 is connected to one end of the slide 4 by a pivot pin 10 and to the strut 7 by a pivot pin 11. In addition a link 12 is connected to the other end of the slide 4 by a pivot pin 13, and a bar member 14 provided with screw holes 1 5 for securing the bar member 14 to the bottom sash member of the window is connected to the link 12 by a pivot pin 16 and to the strut 7 by a pivot pin 1 7. Finally a link 18 is connected at one end to the bar member 14 by a pivot pin 1 9 and at the other end to the brace 9 by a pivot pin 20.

The strut 7 includes a cranked portion 21, and the bar member 14 includes a cranked portion 22.

The bar member 14, which is shown in a partly open position in Figure 1, is movable between a fully open position in which it is substantially perpendicular to the track member 2 and the slide 4 engages the stop 6, and a fully closed position in which the strut 7, brace 9, link 12, bar member 14 and link 18 all lie above the track member 2 and a pointed end 23 of the bar member 14 lies within an angled plate 24 riveted to one end of the track member 2. A locking screw 25 which extends through the slide 4 is capable of being tightened to engage the bottom of the channel 5 in the track member 2 in order to lock the bar member 14 in the closed position or in a partly or fully open position.

Fitted to the strut 7 immediately adjacent the cranked portion 21 and intermediate the cranked portion 21 and the pivot pin 8 is a flattened sleeve 26 formed from Nylon 66 by injection moulding.

As shown more particularly in Figure 2, the sleeve 26 incorporates a bore 27 of internal crosssection corresponding to the cross-section of the strut 7. Furthermore the sleeve 26 is provided with radiused edges 28 and 29, and the upper surface 30 of the sleeve 26 comprises a raised portion 31 defining a cambered surface over which the bar member 14 may ride when it is moved into its closed position, so as to prevent the bar member 14 from catching on the cranked portion 21 of the strut 7. The cambered surface comprises two convexly curved portions 32 and 33 separated by a flat portion 34 parallel to the strut 7.

The lower surface of the sleeve 26, which is not visible in the drawings but which is plane except for the radiused edges 28 and 29, forms a further cambered surface for riding over the track member 2 when the bar member 14 is moved into its closed position, so as to prevent the cranked portion 21 of the strut 7 from catching on the edge of the track member 2. The provision of the sleeve 26 on the strut 7 therefore enables a side hung window provided with such a hinge at the bottom to be moved smoothly into the closed position, and reliably prevents jamming of the window in an open position. Since the two cambered surfaces are symmetrical with respect to the axis of the strut 7, and in view of the construction of the hinge, the hinge 1 illustrated in Figure 1 may serve equally well as the bottom hinge of a left-handed or a right-handed window.

The same hinge may also be used at the top of the window.

In order to fit the sleeve 26 to the strut 7 the former is formed with a bore 27 whose width (about .623 inch) is slightly less than the width (about .625 inch) of the strut 7. The sleeve 26 is then placed in boiling water to soften the material of the sleeve 26 and expand the width of the bore 27. This enables the sleeve 26 to be slid into position on the strut 7, and the sleeve 26 will tightly grip the strut 7 on cooling so that it is firmly held in position on the strut 7. The width (about .37 inch) of the flat portion 34 of the sleeve 26 is dimensioned to be greater than the width (about .30 inch) of a gap which is formed between the bar member 14 and an internal lip on the bottom sash member of the window when the bar member 14 is secured to the bottom of an aluminium profile window, so as to prevent the raised portion 31 of the sleeve 26 from becoming lodged in this gap.

Claims

1. A fitment for a side-hung window hinge as hereinbefore described, comprising an element adapted to be held firmly in position on the strut and providing a cambered surface over which the bar member may ride when it is moved into its closed position.

2. A fitment according to claim 1, wherein the element is a flattened sleeve which may be slid into position along the strut during assembly of the hinge.

3. A fitment according to claim 2, wherein the sleeve is formed with a bore of internal width slightly less than the width of the strut, and is such that it may be raised to an elevated temperature to expand and soften the material of the sleeve so that it may easily be pushed on to the strut and, on cooling, will tightly grip the strut.

4. A fitment according to claim 1, 2 or 3, wherein the element provides a further cambered surface, on the opposite side of the strut to the first-mentioned cambered surface, for riding over the track member when the bar member is moved into its closed position, so as to prevent jamming due to the strut catching on the edge of the track member.

5. A fitment according to any preceding claim, wherein the first-mentioned cambered surface on the element comprises two convexly curved portions separated by a flat portion intended to lie substantially parallel to the strut.

6. A fitment according to any preceding claim, wherein the element is formed by injection moulding from a thermoplastic elastomeric material.

7. A fitment according to any preceding claim, wherein the first-mentioned cambered surface is provided on a raised portion of the element which does not extend the full length of the element.

8. A side-hung window hinge as hereinbefore described provided with a fitment according to any preceding claim.

9. A side-hung window hinge according to claim 8, wherein the fitment is disposed intermediate the region in which the strut is pivotally connected to the track member and the region in which the brace is pivotally connected to the strut.

10. A side-hung window hinge according to claim 9, wherein the fitment is disposed immediately adjacent a cranked portion of the strut intermediate the cranked portion and the first-mentioned region.

11. A fitment for a side-hung window hinge, substantially as hereinbefore described with reference to the accompanying drawings.

1 2. A side-hung window hinge substantially as hereinbefore described with reference to the accompanying drawings.