Movable or removable closures – Mounted for optional movements – Pivot mounted on sliding member; e.g. – slide-stile
Reexamination Certificate
1999-06-25
2001-04-17
Stodola, Daniel P. (Department: 3634)
Movable or removable closures
Mounted for optional movements
Pivot mounted on sliding member; e.g., slide-stile
C049S209000, C049S213000
Reexamination Certificate
active
06216392
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to windows which slide including windows which slide and tilt or swing open and, more particularly, to the provision in a very simple manner of achieving of a greatly improved weather seal on closing the window.
BACKGROUND OF THE INVENTION
Conventional window units incorporating a sliding window or sash employ weather stripping which extends around the sash when it is closed to provide a window seal. Such weather stripping can be mounted on the frame of the sash or on the window frame in which the sash slides or on both the sash and window frame and is compressed between the sash and window frame to effect the window seal.
Manipulation of the sash on opening and closing the window subjects such weather stripping to frictional wear and tear. As a result, such exposure to frictional abrasion limits the nature of the weather stripping which can be used to solid type strips with limited compressibility or spreadability thereby limiting the effectiveness of the window seal. The effectiveness of this seal in turn decreases with the frictional wear and tear under continued usage.
U.S. Pat. No. 4,704,821, issued Nov. 10th, 1987, discloses a floating slideable lower sash attached to a complex balance arrangement which is actuated to displace the bottom edge of the sash laterally against weather stripping as it reaches the closed position. However, such special arrangement is expensive and does not provide a uniform seal around the sash by simple closing of the sash. Further, such arrangement does not positively preclude frictional wear of the weather stripping on manipulation of the sash.
SUMMARY OF THE INVENTION
This invention resides in providing a very simple arrangement whereby the slideable sash of a window unit is moved laterally at the point of closure by the act of closing to uniformally compress weather stripping used to seal the window around the sash without subjecting such weather stripping to damaging frictional stress.
It will be understood that with this arrangement in which the weather stripping is simply subjected to compressive forces the invention enables the use of softer weather stripping such as bubble type sealing strips and the like which give a wider area of seal on compression.
In its broadest aspect the invention resides in providing cooperating means between opposite ends of the slideable sash and the frame in which it slides to move the sash laterally as it is closed to compress the sash window sealing weather stripping between the sash and frame. The invention further contemplates the positive retraction of the sash from its weather stripping compression position on raising of the sash.
According to one embodiment of the invention, the lateral movement of the sash is effected by members attached to the sash projecting into recessed trackways with slotted entrances provided in the frame in which the sash slides, such trackways and slots being formed to act on the sash members to simultaneously cam both ends of the sash laterally at the point of sash closing to effect the uniform window seal.
Again in this embodiment of the invention, such sash members and recessed trackways with their slotted entrances are arranged for cooperative action to positively retract the sash laterally from its weather stripping compressing position and eliminate frictional wear on the weather stripping as the sash is raised.
Again, according to a preferred embodiment of the invention, there is provided a slideable sash as aforesaid which is also tiltable or swingable.
In this connection, according to one embodiment of the invention, the members attached to the sash which ride in the frame trackways comprise shoes to which one end of said sash is pivoted, and tilt or swing locks mounted at the opposite end of said sash and having locking bolts projectable into the slotted entrances of the trackways shaped to provide the required lateral sash movement on closing.
In another embodiment of the invention, the sash is provided at each end with projecting pins which ride in the frame trackways or slots, the pins at one end of the sash preferably being retractable for sash swinging or tilting and/or removal.
Again, in utilizing the interaction between members carried by the slideable sash and the trackways provided in the frame in which the sash slides according to the invention, conventional balances may be employed for vertically slideable and/or vertically slideable and tiltable sashes.
These and other features of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
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Royal Plastics Inc.
Stodola Daniel P.
Thompson Hugh B.
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