Duct structure |
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| 申请号 | US3656782D | 申请日 | 1969-10-28 | 公开(公告)号 | US3656782A | 公开(公告)日 | 1972-04-18 |
| 申请人 | ANGELO R MOLINO; | 发明人 | MOLINO ANGELO R; | ||||
| 摘要 | A duct structure comprising a duct having a sidewall with an opening having opposite side edges and end edges extending between said said side edges, said side wall being formed with cuts extending from said opening laterally outward adjacent to one end edge, and a generally tubular open-ended take-off having one end generally similar to and larger than said sidewall opening and located outwardly of said duct with said one take-off end proximate to said sidewall opening, said take-off having a flange extending partially about said one take-off end conformably along the other end edge and side edges of said opening interiorly of said duct, said flange being provided with a groove extending therealong into said take-off and slidably receiving said other end edge and side edges of said opening, said take-off being slidably removable away from said opening with said flange engaged in said cuts, said take-off having a lip projecting from said one take-off end extending along said one end edge in facing engagement with the exterior of said sidewall. | ||||||
| 权利要求 | 1. A duct structure comprising a duct having a sidewall with an opening having opposite side edges and end edges extending between said side edges, said sidewall being formed with cuts extending from said opening laterally outward adjacent to one end edge, and a generally tubular open-ended take-off having one end generally similar to and larger than said sidewall opening and located outwardly of said duct with said one take-off end proximate to said sidewall opening, said take-off having a flange extending partially about said one take-off end conformably along the other end edge and side edges of said opening interiorly of said duct, said flange being provided with a groove extending therealong into said take-off and slidably receiving said other end edge and side edges of said opening, said take-off being slidably removable away from said opening with said flange engaged in said cuts, said take-off having a lip projecting away from the opening of said one take-off and extending along said one end edge in facing engagement with the exterior of said sidewall. 2. The structure of claim 1, in which said lip is in resilient bearing engagement with the exterior of said sidewall along said one end edge, and including fastener means detachably securing said lip to said sidewall to hold said take-off against sliding removal away from said opening. 3. The structure of claim 1 in which said take-off extends generally angularly from said one end thereof towards said other edge of said opening for simultaneous connection of both ends of said take-off. 4. The structure of claim 1, in which said other end edge of said opening is arcuately concave and merges smoothly with said side edges, and said flange has an arcuately convex portion for conforming engagement with said other end edge. 5. The structure of claim 2 in which said fastening means include aligned openings in said one end edge of said duct and said lip of said take-off and a screw element extending therethrough and securing same together. 6. The structure of claim 8, in which the side edges of said duct diverge toward said one end edge, and said flange of said take-off has diverging portions extending from said convex portion for conforming engagement with the side edges of said duct. 7. The structure of claim 4, in which said one end edge of said duct is generally straight, and said lip of said take-off is generally straight for conforming extension along said one end edge of said duct. 8. A duct take-off for being partially received through an opening in and secured with the sidewall of a duct comprising a generally tubular open-ended body of sheet-metal material having one end generally similar to and larger than the sidewall opening of a duct and having an indented region extending partially about said body adjacent to one end thereof to define an outwardly facing groove, said groove being circumferentially continuous throughout its entire length, said body having said material extending generally outward beyond said groove to provide an outstanding flange for being received through the opening of said duct, and extending along the remainder of said one body end which does not have said groove to provide an outstanding lip projecting outwardly away from said body for direct facing engagement with the exterior of the sidewall of said duct said lip being offset from said outstanding flange in a direction toward the other end of said body by an amount at least equal to the thickness of the material forming the sidewall of the duct to which it is to be connected. 9. The duct take-off of claim 6, in which said lip is resilient anD includes fastener means for detachably securing said lip to said side wall for holding said body against removal from said duct. |
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