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US 6,126,766 AGranted
Method of applying a spray-applied foam to roofing and other surfaces
OwnerJohn P. Hunter, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A method and an industrial robotic device for uniformly applying coatings at appropriate thickness and pitch upon a surface moves a spray applicator foam dispenser between two parallel tracks. The uniform application of foam at each pass is assured, by accelerating the speed of the foam dispenser at the end of each pass, by providing respective curved uphill distal ends of the tracks, so that the spray applicator foam dispenser moves up the curved distal ends and returns quickly while changing speed tilt and direction at the end of each pass.
Claims11
A method of applying a spray-applied foam substance coating upon a structural surface, comprising the steps of
- continuously applying said foam substance in liquid form in adjacent axially extending bands of said foam substance to form a coating of a resultant solid layer of said substance, upon said structural surface, from a spray applicator source moving in alternate directions along a track having a straight, horizontal portion and respective arcuate uphill opposite end portions, said spray applicator source moving transverse to an axially extending direction of each band of said bands of said substance, each said band having a predetermined width and axially extending length,
- said spray applicator source moving laterally in a horizontal plane parallel to said structural surface, said nozzle being moved in a vertical plane away from said lateral horizontal plane parallel to said structural surface,
- subjecting said spray applicator source of said substance in liquid form to an arcuate uphill movement upon said respective arcuate, uphill opposite end portions of said track at each end portion of each said transverse movement of said spray applicator source of said substance in liquid form, wherein said transverse movement of said spray applicator source of said substance in liquid form accelerates in speed, alone said track,
- moving said spray application source of substance along said respective arcuate, uphill opposite end portion of said track in liquid form outward as said spray applicator source of said substance in liquid form moves arcuately uphill, and tilts, thereby reducing the amount of said substance in liquid form being applied to said respective edge portions of each said band of said substance upon the structural surface at an end of each pass of said spray applicator source across each said linearly extending band of said substance.
1 more element
A method of applying a solid roofing polyurethane foam coating upon a structural surface, comprising the steps of:
- continuously applying said polyurethane foam in liquid form in adjacent axially extending bands of foam, said polyurethane foam being a coating of a resultant solid foam layer upon said structural surface,
- applying said coating from a foam applicator source moving in alternate directions along a track having a straight horizontal portion and respective arcuate uphill opposite end portion, said spray applicator source moving transverse to an axially extending direction of each band of said bands of said foam, each said band having a predetermined width and axial length,
- said applicator source moving laterally in a horizontal plane parallel to said structural surface, said nozzle being moved in a vertical plane away from said lateral horizontal plane parallel to said structural surface,
- subjecting said applicator source of polyurethane foam to an arcuate uphill movement upon said respective arcuate uphill opposite end portions of said track at each end portion of each said transverse movement of said applicator source of liquid form, wherein said transverse movement of said foam applicator source of liquid form accelerates in speed,
- moving said foam applicator source of liquid foam along said respective arcuately uphill opposite end portion of said track outward as said foam applicator source of liquid foam moves arcuately uphill;
- and tilts, thereby reducing the amount of said liquid foam applied to said respective edge portions of each said band of foam upon the roof at an end of each pass of said liquid foam applicator source across each said linearly extending band of foam.
3 more elements
A method of applying a solid roofing polyurethane foam layer upon a structural surface, comprising the steps of:
- continuously applying said substance in liquid form in adjacent linearly extending bands from a spray applicator source moving laterally in a horizontal plane parallel to said structural surface, comprising means for varying the distance between said spray applicator source and a structural surface target surface, said spray applicator source moving on a track in alternate directions transverse to an axial direction of each band, each said band having a predetermined width and axial length;
- and wherein
- said means for varying the distance between said spray applicator source and a structural surface target surface comprises subjecting said applicator source to an uphill movement by the bending of said track at each end portion of each said transverse movement of said applicator source;
- said foam applicator source being tilted outwardly by said track as said foam applicator source moves uphill on said track,
- said nozzle being moved in a vertical plane away from said lateral horizontal plane parallel to said structural surface,
- thereby reducing the amount of said liquid foam being applied to said respective edge portions of each said band of foam upon the roof at an end of each pass of said liquid foam applicator source across each said linearly extending band of foam.
3 more elements
Dependencies are inferred from the claim text.