Patent Application
20170107750
The present invention relates to windows, and more particularly, relates to window operators such as may be used in a casement windows or alternatively, in awning windows.
Casement windows are well known in the art and are widely used in new constructions. A casement window is hinged at the side and has a window sash which is movably mounted within a frame by a pair of hinges mounted between the window frame at the top and bottom of the window sash. The arrangement is normally one in which a track is mounted to the window frame to interconnect a track and window sash. In this respect, a support arm is pivotably connected to the sash arm and to the track. The sash arm is also pivotably connected to a mounting shoe which is supported and guided for movement lengthwise of the track which is mounted on the window.
An alternative arrangement is to provide an intervening length between the sash arm and the movable shoe to provide for an offset sash arm. Such an arrangement typically includes a second intervening length between the support arm and the movable shoe to provide further support.
An awning window, on the other hand, is pivoted at the top by hinges. Such an arrangement is desirable in certain situations since the window pivots outwardly from the bottom and will remain in a position to shelter or shield the opening.
Casement window operators are also well known in the art. The window operator typically will utilize a hand crank which is rotatable and which in turn drives a worm gear. The worm gear in turn will drive gearing which is connected to the arm which pushes the window sash open. As aforementioned, the worm gear assembly includes a gear shaft having the worm at one end with the other end extending outwardly through the housing to engage the crank.
As described above, there are different opening arrangements for casement windows. A first arrangement utilizes a single arm operator which has an arm which pivots about an axis that is fixed with respect to the window frame and worm gear. A remote end of the arm carries a bearing which slides in a track mounted on the underside of the sash. The known disadvantage of single arm operators is the torque required to move the sash towards its fully open position. Thus, the force required both causes difficulty for the person opening the window and also leads to excessive wear of the mechanism.
A second known type of casement window operator is typically known as a “split arm”. A split arm operator includes a second arm which has a pivot point in the middle of the second arm and the remote end of the second arm is secured through a pivotable mounting to a fixed point on the sash. This arrangement allows the window to extend to its fully open position. However, it does suffer from the disadvantage of requiring excessive force at the time of the initial opening of the sash.
A third type of window operator is typically known as a “dual arm”. The dual arm operator has one arm which rotates about a fixed axis and a housing which carries at its far end a bearing to slide in a track mounted to the window sash. There is also a second arm which has a pivot joint and which is secured at its remote end by a pivotable but fixed connection to the sash.
It is an object of the present invention to provide improvements to casement window operators wherein on site adjustments may easily be made.
It is a further object of the present invention to provide window operators which include a locking mechanism.
It is a further object of the present invention to provide a locking mechanism which ensures that the window operator is not utilized until the window is unlocked.
It is a further object of the present invention to provide a window operator for an awning window which allows identical movement on both sides of the window.
According to a further aspect of the present invention, there is provided an operator for a window comprising a base designed to be secured to a window sash, an arm having first and second ends, the first end being secured to the base, the first end of the arm having a worm wheel formed thereon, a shaft having a worm operatively connected to the worm wheel, a handle secured to the shaft, a locking mechanism comprising a multi-point tie bar, and an actuator connected to a rack and pinion gear arrangement to move the multi-point tie bar between open and locked positions.
According to a still further aspect of the present invention, there is provided an operator for a window comprising a base designed to be secured to a window sash, an arm having first and second ends, the first end being secured to the base, the first end of the arm having a worm wheel formed thereon, a shaft having a worm operatively connected to the worm wheel, a handle secured to the shaft, a locking mechanism comprising a blade, a guide mounted on the sash, the blade being movable within the guide, and an actuator connected to the blade to move the blade between open and locked positions, the actuator, when in the locked position, preventing access to the handle, the actuator when moved to the open position allowing access to the handle.
In one of the above aspects, the operator is used with casement windows wherein the window is hinged on the side between the top and bottom of the window sash. The operator of the present invention may be utilized with a single arm, split arm or dual arm arrangement.
As mentioned above, the operator preferably utilizes a worm wheel or gear formed at a first end of an arm and which worm wheel is designed to engage a worm formed at one end of a shaft. The arm may be secured to the base by suitable securement members.
In one embodiment of the present invention, there is provided a multi point tie bar which is utilized in a locking mechanism. A locking mechanism is incorporated with the operator within the same housing. The locking mechanism is arranged such that the window must be unlocked prior to use of the window crank for opening of the window. This arrangement overcomes the problem of a user attempting to open the window while still locked. Frequently, excessive force is utilized by the person attempting to open the window which can lead to breakage of one or more of the components.
The locking mechanism should meet several standards for the industry. One requirement for many manufacturers is that integrated locking and opening mechanisms fit within pre-designed openings in the window. To do so, a compact design must be utilized. In the instant invention, the use of a rack and pinion gear allows for a compact design which also provides an arrangement which resists opening from the exterior of the window.
Having thus generally described the invention, reference will be now made to the accompanying drawings illustrating embodiments thereof, in which:
Referring to the drawings in greater detail and by reference characters thereto, there is illustrated in
Operator 16, as may be better seen in
Mounted on the upper side of base 18 are posts 22 and 24 for reasons which will become apparent hereinbelow. Base 18 also has a aperture 26.
In the illustrated embodiment, operator 16 includes a first arm 28 and a second arm 30. Arms 28 and 30 are conventional in the art of window operators. Arms 28 and 30 are secured by rivet 32.
Arm 28 has a first end generally designated by reference numeral 34 and forms a portion of a worm wheel 36, as is well known in the art. It will be noted that there is provided an aperture 33 in worm wheel 36 and which aperture 33 overlies aperture 26. A shim 38 is placed between worm wheel 36 and base 18.
An upper securement member 40 works in conjunction with a lower securement member 42 to secure arm 28 in position. In this regard, upper securement member 40 has a threaded recess which is designed to screwthreadedly engage with threads 44 on lower securement member 42. In this arrangement, the lower securement member 42, upon tightening the same, draws upper securement member 40 downwardly into position to maintain a secure connection therebetween.
A shaft 46 has a worm 48 formed at one end thereof. At the opposed end, there is provided a spur gear 50 and worm screw 57 which is designed to engage with a handle 51.
Shaft 46, at the end proximate worm 48, has a recess 52 which is designed to receive a ball bearing 54 to allow for easy turning of shaft 46. A thermal seal 56 is also provided to prevent the passage of air from the interior of operator 16.
Operator 16 also includes a monocoque housing 58 which has two internally threaded cylinders 60, 62 which are designed to receive screws 64, 66 passing through post 22 and 24 to thereby mount the base 18 to the monocoque housing 58.
Ideally, a sealing member 68 is provided for thermal sealing against sash 14.
Turning to the embodiment of
A first arm 108 includes a mounting aperture 110 formed therein. A second arm 112 has a second arm extension 114 as in the previously described embodiment. A mounting aperture 116 is formed in the center of worm wheel 118. A shim 120 is mounted between second arm 112 and first arm 108. As in the previously described embodiment, there is provided an upper securement member 122 and a lower securement member 124 which are screwthreadedly engaged with each other.
In this embodiment, there is provided a second worm wheel 126 while as may be seen in
As may be seen in
There is also provided a pinion gear 318 and securement member 320. Pinion gear 318 is designed to mesh with rack gear 322.
The blade is formed of a plurality of blade members 326 and connectors 324 with plugs 328. In this arrangement, a series of precut blade members 326 may be arranged to have the desired length. The length will vary upon the size of the window.
The track includes a corner component generally designated by reference numeral 334. Corner component 334 has a base 336 and a pair of side walls 338 which are angled inwardly so as to retain the blade therein. Side walls 338 and base 336 form a channel 340. Blade members 336 are serrated or have teeth 344 formed thereon.
Where a blade member 336 passes through corner 334, there is provided an upper corner element 348 and a lower corner element 350. Upper corner element 348 includes a center portion 352 which is arranged to press on a blade member 326 as it goes through the corner. As upper corner element 348 is formed of a low friction material, this assists in the blade moving around the corner.
As shown in
In the embodiment shown as
In the embodiment of
It will be understood that the above described embodiments are for purposes of illustration only and that changes and modifications may be made thereto without departing from the spirit and scope of the invention.
