AU2018206835A1

AU2018206835A1 - A double hung window lock

Info

Publication number: AU2018206835A1
Application number: AU2018206835A
Authority: AU
Inventors: David Winston; Kewen Zhou
Original assignee: Azuma Design Pty Ltd
Current assignee: Azuma Design Pty Ltd
Priority date: 2017-07-21
Filing date: 2018-07-20
Publication date: 2019-02-07

Abstract

A DOUBLE HUNG WINDOW LOCK A lock (10) for a double hung window. The lock (10) includes a handle (28) that is operable to move a cam member (30) angularly about an axis (29). The axis (29) mounting face of the lock (10). 10t (2 4e to F cuban iruo3

Description

A DOUBLE HUNG WINDOW LOCK

FIELD [0001] The present invention relates to window locks, and more particularly but not exclusively to window locks for double hung windows.

BACKGROUND [0002] Double hung window locks have traditionally consisted of a keeper that is attached to one movable window panel, and a cam catch attached to the other movable window panel, with the cam catch moved into engagement with the keeper to retain the two window panels fixed to the closed position.

[0003] It is also known to provide the cam catch with a lock cylinder that retains the cam catch engaged with the keeper to prevent movement of the cam member from disengagement with the keeper, that is retaining the window in the closed position.

[0004] Disadvantages of known double hung window locks include engagement of the cam lock with stiffening transoms on the movable window panel that may cause damage. A further disadvantage is that the locks are not aesthetically pleasing. A further disadvantage is that the lock cylinder in many constructions is mounted in the cam member.

OBJECT [0005] It is the object of the present invention to overcome or substantially ameliorate at least one of the above disadvantages.

SUMMARY OF INVENTION [0006] There is firstly disclosed herein a window lock to engage a keeper, the window lock including:

a body having a mounting portion that is to abut a window panel, the mounting portion defining a generally flat plane;

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2018206835 20 Jul 2018 a cam member mounted in the body so as to be angularly movable about a cam axis between a first position at which the cam member projects outwardly of the body to engage the keeper, and a second position at which the cam member is retracted relative to the body from the first position, with said cam axis being inclined to said plane by an acute angle; and a part fixed to the cam member and to be engaged by a user to move the cam member about said axis between the first and second positions.

[0007] Preferably, said acute angle is 10° to 20°.

[0008] Preferably, said acute angle is about 15°.

[0009] The window lock includes a housing incorporating said hollow body, with the cam member located entirely within the housing when in the second position so as to not project outwardly of the housing.

[0010] Preferably, the lock window includes a key operable lock cylinder that is moved angularly between a lock position and a release position with respect to said part, with the lock cylinder movable angularly about an axis extending generally perpendicular to said plane.

[0011] Preferably, the window lock includes a locking bar moved between a release position and a lock position with respect to said part, by angular movement of the lock cylinder.

[0012] Preferably, the part includes a handle that is longitudinally elongated in a direction extending away from said cam axis.

[0013] Preferably, said locking bar is moved in a linear direction generally perpendicular to the axis of the cylinder, and generally transverse of the cam axis.

[0014] Preferably, the cam member includes a cam surface that engages the keeper, the cam surface extending angularly about the cam axis between a first location and a second location, with the cam surface having a direction of extension generally parallel to the cam axis between the first location and the second location.

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2018206835 20 Jul 2018 [0015] There is further disclosed herein a window lock to engage a keeper, the window lock including:

a housing including a hollow body to be attached to a window panel; a cam member mounted in the body and movable angularly about a cam axis between a first position at which the cam member engages the keeper, and a second position at which the cam member is retracted back into the housing so as not to project outwardly of the housing; and wherein the cam member has a cam surface extending angularly about said cam axis between a first location and a second location, with the cam surface having a direction of extension, between the first location and the second location, that is generally parallel to said axis.

[0016] Preferably, said housing has a mounting portion to engage the window panel, the mounting portion defining a flat plane, and wherein the cam axis is inclined to the plane by an acute angle.

[0017] Preferably, said acute angle is 10° to 20°.

[0018] Most preferably, said acute angle is about 15°.

[0019] Preferably, the window lock includes a handle that is movable angularly about a handle axis to cause movement of the cam member between the first and second positions thereof.

[0020] Preferably, the handle moves angularly about the cam axis.

[0021] Preferably, the window lock includes a lock cylinder that is operable to retain the handle in a lock position, and is operable to release the handle for angular movement.

[0022] Preferably, the lock cylinder is movable about a cylinder axis, the cylinder axis being generally perpendicular to said plane.

[0023] Preferably, the lock includes a locking bar operatively associated with the cylinder, with the cylinder moving the locking bar between a lock position and a release position with respect to the handle.

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2018206835 20 Jul 2018 [0024] There is still further disclosed herein a window lock to engage a keeper, the window lock including:

a body to be attached to a window panel;

a cam member mounted in the body for angular movement about a cam axis, the cam member being movable angularly between a first position projecting outwardly of the body to engage the keeper, and a second position at least partly retracted into the body;

a part fixed to the cam member and to be gripped by a user to move the cam member between the first and second positions thereof; and a lock cylinder mounted in the body and operatively associated with the cam member to engage the cam member to retain the cam member in the first position, the lock cylinder having a cylinder axis about which the lock cylinder is moved, the cylinder axis being inclined to the cam axis by an acute angle.

[0025] Preferably, the part is a handle, the handle being longitudinally elongated and extending away from said cam axis, with the handle moved angularly about said cam axis to move the cam member between the first and second positions thereof.

[0026] Preferably, the window lock includes a housing incorporating said body, with the housing providing mounting portions that abut the window panel, and provide a flat plane, with said cam axis being inclined to the flat plane by an acute angle.

[0027] Preferably, said acute angle is 10° to 20°.

[0028] Most preferably, said acute angle is about 15°.

[0029] There is still further disclosed herein a window lock to engage a keeper, the window lock including:

a hollow body to be attached to a window panel;

a cam member mounted in the body and movable angularly about a cam axis between a first position at which the cam member engages the keeper, and a second position at which the cam member is at least partly retracted into the body, the cam member having a cam surface to engage the keeper, the cam surface extending angularly about said axis between a first location and a second location, with the cam surface having a direction of extension, between the first location and the second location, that is generally parallel to said cam axis;

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2018206835 20 Jul 2018 a part fixed to the cam member and to be engaged by a user to move the cam member about said cam axis between the first and second positions thereof; and a locking bar mounted in the body for movement relative thereto between a release position and a lock position, the locking bar in the lock position being operatively associated with the part to prevent movement thereof, while in the release position permitting movement of the part about said cam axis.

[0030] Preferably, the body has mounting portions that abut the window panel and define a flat plane, with said cam axis being inclined to said plane by an acute angle.

[0031] Preferably, said acute angle is 10° to 20°.

[0032] Preferably, said acute angle is about 15°.

[0033] Preferably, the lock window includes a lock cylinder operatively associated with the locking bar to cause movement thereof between the release and lock positions thereof, with the lock cylinder being moved angularly about a cylinder axis, with said cylinder axis being generally perpendicular to said plane.

BRIEF DESCRIPTION OF DRAWINGS [0034] Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings wherein:

[0035] Figure 1 is a schematic isometric view of a lock for a double hung window;

[0036] Figure 2 is a schematic side elevation of the lock of Figure 1;

[0037] Figure 3 is a further schematic side elevation of the lock of Figure 1;

[0038] Figure 4 is a schematic top plan view of the lock of Figure 1;

[0039] Figure 5 is a schematic bottom plan view of the lock of Figure 1;

[0040] Figure 6 is a schematic plan view of the lock of Figure 1;

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2018206835 20 Jul 2018 [0041] Figure 7 is a schematic side elevation of the lock of Figure 1;

[0042] Figure 8 is a schematic end elevation of the lock of Figure 1;

[0043] Figure 9 is a schematic sectioned end elevation of the lock as shown in Figure 2 sectioned along the line 9-9;

[0044] Figure 10 is a schematic sectioned end view of the lock as shown in Figure 4 sectioned along the line 10-10;

[0045] Figure 11 is a schematic parts exploded isometric view of the lock of Figure 1;

[0046] Figure 12 is a schematic sectioned elevation of the lock as shown in Figure 10; and [0047] Figure 13 is a schematic sectioned elevation of the lock as shown in Figure 9.

DESCRIPTION OF EMBODIMENTS [0048] In the accompanying drawings there is schematically depicted at lock 10 for a double hung window. The lock 10 includes a cam assembly 11 that is engaged by a keeper 12. The cam assembly 11 would be attached to the lower sash panel 13, and the keeper 12 attached to the upper sash panel 14. The panels 13 and 14 are moved vertically relative to each other in the direction 59.

[0049] The keeper 12 includes a mounting plate 15 through which fasteners 16 pass to fix the keeper 12 to the sash panel 14. The keeper 12 includes a catch projection 17.

[0050] The cam assembly 11 includes a hollow housing 18 through which threaded fasteners 19 pass to fix the cam assembly 11 to the sash panel 13. The housing 18 also provides a mounting face (portion) 20 that abuts the sash panel 13. The mounting face 20 defines a flat plane 21.

[0051] The housing 18 includes a hollow body 22 and a mounting plate 23. The fasteners 19 pass through apertures 24 in the plate 23, with the plate 23 fixed to the body 22 by the fasteners 19 passing through apertures 25 in the body 22 and through the apertures 24 in the plate 23.

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2018206835 20 Jul 2018 [0052] The plate 23 and edge portions of the body 22 abut the panel 13 to define the flat plane 21.

[0053] The body 22 is provided with a passage 26 that receives the shaft 27 that is fixed to a handle 28. The handle 28 is elongated so as to extend longitudinally away from the axis. The shaft 27 projects inwardly of the passage 26 and slidably engages the body 22 to provide for angular movement of the handle 28 about an axis 29. Fixed to the shaft 27, so as to be located internally of the body 22, is a cam member 30. In particular, the cam member 30 has a pair of spaced flanges 31 between which there extends a flange 32 of the shaft 27, so that upon angular movement of the handle 28 about the axis 29, the cam member 30 is also caused to move angularly about the axis 29.

[0054] The cam member 30 also includes a cam portion 55 having a cam surface 56 that engages the catch projection 17 when the sash panels 13 and 14 are to be retained in the closed position. The cam surface 56 extends angularly about the axis 29 so as to extend between a first location 57 and a second location 58, with the surface 56 having a direction of extension between the locations 33 and 34 that is generally parallel to the axis 29. Accordingly the surface 56 has a direction that includes a direction about said axis as well as a direction parallel to the axis 29.

[0055] The cam member 30 also includes a projection 35 that extends radially outwardly relative to the axis 29, and that engages the housing 18 to define the limit positions of the handle 28 about the axis 29.

[0056] Focated between the cam member 30 and the body 22 is a washer 36, with a threaded fastener (screw) 37 extending through the cam member 30 and to threadably engage in the shaft 27.

[0057] The body 22 is provided with a further passage 38 that receives a lock cylinder 39 that is key operable by means of a key 40. A user can operate the cylinder 39 by moving the key angularly about an axis 41.

[0058] The cylinder 39 has a cam projection (not visible in Figure 11) projecting from the end base 42 and that is spaced from the axis 41 so as to be moved angularly thereabout by operation of the key 40. The cam projection of the cylinder 39 is located to cause linear movement of a

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2018206835 20 Jul 2018 locking bar 43. The bar 43 has a flange 44 with an elongated slot 45 within which the cam projection is located so that angular movement of the cam projection about the axis 41 causes sliding movement of the locking bar 43 in the liner direction 46. The locking bar 43 also has a plate 47 with a shaped aperture 48 including a first aperture portion 49 and a smaller second aperture portion 50. The locking bar 40 is slidably mounted in a slot 60 of the body 22.

[0059] The shaft 27 has flat portions 51 that project through the aperture 48. When the flat portions 51 project through the aperture portion 49 (Figure 12), the handle 28 is free from movement about the axis 29. However, by operation of the key 40 to move the bar 43 so that the shaft 27 projects into the aperture portion 50 (Figure 13), the surfaces 52 of the plate 47 engage the flat portions 51 preventing operation of the handle 28, and therefore retaining the keeper 12 fixed to the cam assembly 11, and therefore retaining the window panels 13 and 14 in the closed position.

[0060] Upon operation of the key 40 in a reverse direction, the locking bar 43 is moved to a position releasing the handle 28 for operation, that is the shaft 27 passes through the aperture portion 49.

[0061] Slidably mounted in the body 22 is slide 53 that slides against flanges 31 and 32 to urge the handle 28 to its end extremity angular positions, that is the position shown in Figure 2 and the position shown in Figure 3. A spring 54 engages the slide 53 and the body 22 urging the slide 53 against the flanges 31 and 32.

[0062] When installed, the plane 21 is horizontally oriented.

[0063] Preferably, the axis 29 is inclined to the plane 21 by an acute angle 54. Preferably, the angle 54 is 10° to 20°. More preferably the angle 54 is about 15°, that is 15° to the horizontal.

[0064] Preferably, the axis 41 is generally perpendicular to the plane 21, while when the lock 10 is installed the axis 41 is generally vertical.

[0065] The direction 46 is generally perpendicular to the axis 41 and transverse relative to the axis 29. When the lock 10 is installed the direction 46 is generally horizontal.

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2018206835 20 Jul 2018 [0066] The lock 10 has a number of advantages including the cam member 30 being retractable entirely back into the body 22, particularly the hollow housing 18 so as not to project therefrom. The handle 28 is angularly movable without engaging the key 40, or the user’s hand. The handle 28 is lockable to retain the window in the closed position by operation of the locking bar 43. In respect of the locking bar 43, it should be appreciated the locking bar 43 is movable between a release position and a locking position by operation of the key 40. The handle 28 is operable when the bar 43 is in the release position while preventing movement when the bar 43 is in the lock position.

Claims

1. A window lock to engage a keeper, the window lock including:

a cam member mounted in the body so as to be angularly movable about a cam axis between a first position at which the cam member projects outwardly of the body to engage the keeper, and a second position at which the cam member is retracted relative to the body from the first position, with said cam axis being inclined to said plane by an acute angle; and a part fixed to the cam member and to be engaged by a user to move the cam member about said axis between the first and second positions.

2. The window lock of claim 1, wherein said acute angle is 10° to 20°.

3. The window lock of claim 2, wherein said acute angle is about 15°.

4. The window lock of claim 1, 2 or 3, further including a housing incorporating said hollow body, with the cam member located entirely within the housing when in the second position so as to not project outwardly of the housing.

5. The window lock of any one of claims 1 to 4, wherein the lock window includes a key operable lock cylinder that is moved angularly between a lock position and a release position with respect to said part, with the lock cylinder movable angularly about an axis extending generally perpendicular to said plane.

6. The window lock of claim 5, wherein the window lock includes a locking bar moved between a release position and a lock position with respect to said part, by angular movement of the lock cylinder.

7. The window lock of any one of claims 1 to 6, wherein the part includes a handle that is longitudinally elongated in a direction extending away from said cam axis.

8. The window lock of claim 7, wherein said locking bar is moved in a linear direction generally perpendicular to the axis of the cylinder, and generally transverse of the cam axis.

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9. The window lock of any one of claims 1 to 8, wherein the cam member includes a cam surface that engages the keeper, the cam surface extending angularly about the cam axis between a first location and a second location, with the cam surface having a direction of extension generally parallel to the cam axis between the first location and the second location.

10. A window lock to engage a keeper, the window lock including:

11. The lock window of claim 10, wherein said housing has a mounting portion to engage the window panel, the mounting portion defining a flat plane, and wherein the cam axis is inclined to the plane by an acute angle.

12. The lock window of claim 11, wherein said acute angle is 10° to 20°.

13. The lock window of claim 12, wherein said acute angle is about 15°.

14. The lock window of any one of claims 10 to 13, wherein the window lock includes a handle that is movable angularly about a handle axis to cause movement of the cam member between the first and second positions thereof.

15. The lock window of claim 14, wherein the handle moves angularly about the cam axis.

16. The lock window of claim 14 or 15, wherein, the window lock includes a lock cylinder that is operable to retain the handle in a lock position, and is operable to release the handle for angular movement.

17. The lock window of claim 16, wherein, the lock cylinder is movable about a cylinder axis, the cylinder axis being generally perpendicular to said plane.

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18. The lock window of claim 16 or 17, wherein, the lock includes a locking bar operatively associated with the cylinder, with the cylinder moving the locking bar between a lock position and a release position with respect to the handle.

19. A window lock to engage a keeper, the window lock including: a body to be attached to a window panel;

20. The window lock of claim 19, wherein the part is a handle, the handle being longitudinally elongated and extending away from said cam axis, with the handle moved angularly about said cam axis to move the cam member between the first and second positions thereof.

21. The window lock of claim 19 or 20, wherein, the window lock includes a housing incorporating said body, with the housing providing mounting portions that abut the window panel, and provide a flat plane, with said cam axis being inclined to the flat plane by an acute angle.

22. The window lock of claim 21, wherein said acute angle is 10° to 20°.

23. The window lock of claim 22, wherein said acute angle is about 15°.

24. A window lock to engage a keeper, the window lock including: a hollow body to be attached to a window panel;

a cam member mounted in the body and movable angularly about a cam axis between a first position at which the cam member engages the keeper, and a second position at which the

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2018206835 20 Jul 2018 cam member is at least partly retracted into the body, the cam member having a cam surface to engage the keeper, the cam surface extending angularly about said axis between a first location and a second location, with the cam surface having a direction of extension, between the first location and the second location, that is generally parallel to said cam axis;

a part fixed to the cam member and to be engaged by a user to move the cam member about said cam axis between the first and second positions thereof; and a locking bar mounted in the body for movement relative thereto between a release position and a lock position, the locking bar in the lock position being operatively associated with the part to prevent movement thereof, while in the release position permitting movement of the part about said cam axis.

25. The window lock of claim 24, wherein the body has mounting portions that abut the window panel and define a flat plane, with said cam axis being inclined to said plane by an acute angle.

26. The window lock of claim 25, said acute angle is 10° to 20°.

27. The window lock of claim 26, wherein said acute angle is about 15°.

28. The window lock of any one of claims 24 to 27, wherein the lock window includes a lock cylinder operatively associated with the locking bar to cause movement thereof between the release and lock positions thereof, with the lock cylinder being moved angularly about a cylinder axis, with said cylinder axis being generally perpendicular to said plane.