| 摘要 |
A window unit is provided including an extruded frame and a moveable wind ow panel, the frame comprising a channel for mounting the window panel therein, a cavity disposed outwardly of the channel, first and second throughbores for facilitating communication between the channel and the cavity, wherein the first throughbore is disposed at a level below the second throughbore, a third throughbore for facilitating communication between the cavity and an external environment, a first weeper , mounted in the first throughbore, including a flapper valve characterized by open an d closed position, wherein the flapper valve assumes the open position upon urging by fluid pressure in the channel, and a second weeper, mounted in the third throughbore, including a flapper valve characterized by open and closed positions, wherein the flapper valve assumes the open position open urging by fluid pressure in the cavity. A wat er drain unit is also provided for insertion in a mating wall slot in a window unit, including a frame composition, a peripheral flange disposed at a first end of the frame for abutment against the wall of a window unit, and defining a drain opening, a deep upper wall with a plurality of upstanding ribs extending therefrom for frictional engagement with the wall slot, a shallow lower wallwith a plurality of pliable ribs depending therefrom for frictional engagement with the wall slot, first and second sidewalls extendi ng between and joining the upper and lower walls, each of the sidewalls terminating and merging with a second end of the frame to define a second open end, a first seating surface including a first orifice, a second seating surface including a second orifice, whereby the first and second orifices facilitate communication between the drain opening and the open second end, a first and second set of mating holes formed in each of the fir st and second sidewalls, and a flapper valve for mounting within either of the first or second set of mating holes for seating against the first seating surface when mounted in t he first set of mating holes and for seating against the second seating surface when mounted in the second set of mating holes.
|
