Abstract:
There is provided an electrical enclosure that maintains a rainproof seal using a formed lip, an elongated nub, and barrel hinges with spaced apart members therebetween to allow vertical movement of the enclosure door.

Description:
This is a continuation of copending application Ser. No. 07/526,077 filed on May 18, 1990, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention generally relates to electrical enclosures and in particular to rainproof electrical enclosures. 
     Certain industrial environments require electrical enclosures that provide protection against falling rain, sleet, snow, and other environmental debris. Additionally, many applications require NEMA 3 R ratings. 
     It is well known in the art to use a gasket to provide for a rainproof seal. However, it would be desirous to have an enclosure that would eliminate the gasket while maintaining the rainproof seal and the NEMA 3 R rating. 
     SUMMARY OF THE INVENTION 
     This invention provides an electrical enclosure with a rainproof seal. This invention includes hinges that allow the door to move vertically as well as rotationally. Also included is an elongated nub and lip system for providing the rainproof seal. 
     In accordance with one aspect of this invention, there is provided an electrical enclosure comprising a box portion, a door, means for holding door to the enclosure, and means integral with the enclosure for providing a substantially rainproof seal upon closing the door. 
     In accordance with another aspect of this invention, there is provided an electrical enclosure comprising a box portion, a door pivotally mounted on the box, hinge means for securing the door to the box and allowing vertical movement of the door, an elongated nub extending along a portion of the box portion, and a lip extending along a portion of the door with the lip engagingly overlapping said nub when the door is in the closed position. 
     In accordance with another aspect of this invention, there is a system for providing a substantially rainproof seal on a box comprising a pivotally mounted door, at least one barrel hinge attaching the box to the door and having spaces between barrels to allow for vertical movement of the door, an elongated nub extending along a portion of the box, and a lip extending along a portion of the door with the lip engagingly overlapping the nub when the door is in the closed position. 
     It is an object of this invention to provide an electrical enclosure with a substantially rainproof seal. 
     It is another an object of this invention to provide an electrical enclosure that can be used in both indoor and outdoor applications. 
     It is a further an object of this invention to provide an electrical enclosure that requires less parts than enclosures taught by the prior art. 
     Other objects and advantages will appear when the following description is considered along with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 illustrates a side view of an electrical enclosure designed according to the teachings of the present invention; 
     FIG. 2 illustrates an enlarged fragmentary view of FIG. 1; and 
     FIG. 3 illustrates the top view of FIG. 1, with the door open. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     For a better understanding of the present invention together with other and further advantages, and capabilities thereof, reference is made to the following disclosure and appended claims in connection with the above-described drawings. 
     In general the present invention provides an electrical enclosure that uses the weight of the enclosure door to form a rainproof seal between a box portion and the door. A specially designed barrel hinge, that allows vertical displacement of the door, is necessary for the system to operate properly. A lip on the door engagingly overlaps a protruding nub portion on the box to provide the rainproof seal. 
     With reference to the drawings, anelectrical enclosure 10 constructed in accordance with the teachings of the present invention is shown in FIGS. 1-3. In FIG. 1, enclosure 10 includes a box portion 12 having a door 14 pivotally connected to the box via barrel hinge system 20. Barrel hinge system 20 consists of barrel hinge plate members 21 and 26 attached to box 12 and door 14 respectively. Cylindrical barrel portions 22 and 24 are formed from barrel hinge plate 21 and cylindrical barrel portion 28 is formed from barrel hinge plate 26. The cylindrical barrel portion 28 is intermeshed between cylindrical barrel portions 22 and 24 and has a pivot pin 27 passing through barrel portions 22, 24, and 28. Spaces 29 are provided between said barrels for allowing relative movement whereby the door 14 may move vertically along the pivot pin 27. 
     In FIG. 2, as door 14 pivots closed, a formed lip 18, disposed on door 14, cams over an elongated nub 16, which forms part of box portion 12. This camming motion is permitted due to spaces 29 between cylindrical barrel portions 22, 24, and 28 that allow for vertical movement of door 14. After lip 18 completely overlaps nub 16, the weight of door 14 causes the door to drop down creating a rainproof seal 17 between lip 18 and top of box 13. The door&#39;s weight, lip 18, and nub 16 forceably combined maintain closure of door 14 as well as a rainproof seal. 
     Referring back to FIG. 1, when door 14 is closed, a latching portion 34 of a releasable latch member 30 latches the door in the closed position. Locking aperture 32 provides for engaging means for locking door 14 closed. 
     FIG. 3 illustrates enclosure 10 with the door 14 open and lip 18. Elongated nub 16 extends across the entire width of box 12, but it may be shorter in length if desired. Also, a plurality of the nubs may be utilized to accomplish the same purpose. 
     While there have been shown and described what are at present considered the preferred embodiments of the invention, it will be obvious to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined by the appended claims.