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Primary Examiner: Anderson, Philip
Assistant Examiner:
Attorney: Beach; Robert W., Brown; Ward

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Title: Roof drain

Abstract: A roof drain, for receiving rain water from a roof and conducting it to a drain pipe, includes a drain body made from polyurethane foam and having a flange integral with and adjacent to the inlet end of such drain body. A collar which makes sealing connection with the roof covering is attached to the drain body flange by molding the drain body in contact with a preformed collar of vinyl acetate ethylene material.

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Inventors: Gobel, Klaus (55 Trier-Irsch, DE, US)

Application Number: 830403
Filing Date: 1977-09-06
Publication_date: 1980-10-28
Assignee:
Primary Class(es): 285/42 4/280, 4/286, 4/290, 138/109, 138/177, 210/474, 264/45.5, 264/46.4, 264/46.9, 264/259
Other Classes:
US Patent Ref:

2347737	May, 1944	Fuller	264/259.
2988226	Jun, 1961	Campbell	210/474.
3007203	Nov, 1961	Ammons	138/DIG.
3036342	May, 1962	Fino	264/46.
3099516	Jul, 1963	Henrickson	264/45.
3182104	May, 1965	Cwik	264/45.
3270114	Aug, 1966	Westlake	264/259.
3388034	Jun, 1968	McCombie	428/437.
3493449	Feb, 1970	Krug	264/46.
3598157	Aug, 1971	Farr et al.	138/177.
3608008	Sep, 1971	Soukup et al.	264/45.
3703194	Nov, 1972	Giordano	138/109.
3703571	Nov, 1972	Roberts	264/46.
3745203	Jul, 1973	Harper	264/DIG.
3819779	Jun, 1974	Pharris et al.	264/45.
3860537	Jan, 1975	Graham et al.	264/45.
3941157	Mar, 1976	Barnett	138/177.
3986733	Oct, 1976	Esser	285/158.
4028450	Jun, 1977	Gould	264/45.

Other Refs: 5705103257113747016091482125265216386325085261862213686001491111

Jul, 1975	AT.
Jun, 1978	CA.
Aug, 1978	DK.
Apr, 1970	DE
Nov, 1972	DE
Jun, 1973	DE
Dec, 1978	SE.
Oct, 1976	TR.
Oct, 1974	GB
Nov, 1977	GB.

Other References: Pilaro, Joseph F., "Ethylene-Vinyl Acetate", in Machine Design, Plastics Reference Issue, vol. 38, No. 14, Jun. 16, 1966, p. 59.
Dubois, J. Harry and Frederick, W. John, "Plastics", New York, Reinhold, c 1967, p. 52.
Modern Plastics Encyclopedia, 1973-1974, vol. 50, No. 10A, Oct. 1973, pp. 550, 551, 554, 686, 687.
Alwitra Flat Roof Products, Nos. 1-11, Klaus Gobel, Trier, W. Germany, Alwitra KG.
Dickert, E. A.; W. A. Himmler; D. E. Hipchen; M. Kaplan; H. A. Silverwood and R. Zettler, "Molding of One-Shot _Rigid Urethane Foam", in Chemical Engineering Progress, (vol. 59, No. 9), Sep. 1963, pp. 33-38.
Lanigan, W. J., "Microwave Curing of Flexible Polyurethane Foam Mouldings", in British Plastics, Oct. 1963, pp. 562-565.
Mobay Bulletin, "The Rolling Showcase for Engineering Plastics", Pittsburgh, Pa., Mobay Chemical Co., n 1968, p. 8.
Metzger, S. H. and D. J. Prepelka, "Progress in RIM Technology", in J. of Elastomers and Plastics, vol. 8, (Apr. 1976), pp. 141-159.