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US 5,372,763 AGranted
Method of forming a transom for a boat
AssigneeC. C. Omega Chemical, Inc.
InventorRobert C. Hordis
Life of this patent
Estimating the term…
Abstract
A method of making a boat includes the steps of forming an integral hull having a rear outer wall by applying successive layers of an outer smooth coating, resin and fibers to a female mold, and allowing the hull to cure, separately forming a rear inner wall by applying sucessive layers of an inner smooth coating, resin and fibers to a male mold and allowing the inner wall to cure, attaching the rear inner wall to the inside of the hull at a position spaced away from the rear outer wall, injecting a syntactic foam comprising a plurality of microspheres encapsulated in resin between the rear inner wall and the rear outer wall to form a core between them, which core bonds throughly to the inner and outer walls forming a strong, sandwich structure after the foam core cures.
Claims3
A method of making a boat transom (13) comprising the steps of
- forming a hull (11) having a rear outer transom wall (17) by applying successive layers of an outer smooth coating, resin and fibers to a female mold, and allowing the rear outer transom (17) wall to cure,
- said boat hull having a bottom wall and side walls, and a bow,
- separately forming a rear inner transom wall (15) by applying successive layers of an inner smooth coating, resin and fibers to a male mold and allowing the inner transom wall (15) to cure,
- said rear inner transom wall having top, bottom and side edge portions,
- attaching the rear inner transom wall to the inside of the hull at a position spaced away from the rear outer transom wall,
- injecting a syntactic foam consisting essentially of a plurality of microspheres encapsulated in resin into the space between the rear inner transom wall and the rear outer transom wall to form a syntactic foam core between them,
- said space having an open top and said injecting being done from the top of the space,
- inserting the syntactic foam into the space from the top by injection means through a hollow wand having a discharge end,
- lowering the discharge end of the wand to the bottom of the space to begin the injection process,
- withdrawing the wand at a rate to allow its discharge end to remain slightly above the rising level of the liquid syntactic foam,
- thereby insuring complete filling of the space while avoiding trapping air bubbles,
- the bottom portion of the rear inner transom wall having a bottom lip that is turned in toward the bow of the boat hull and is generally perpendicular to the rear inner transom wall.
- bonding the turned-in bottom lip to the bottom wall of the boat hull,
- the side portions of the rear inner transom wall having side lips that are turned-in toward the bow of the boat hull and are generally perpendicular to the rear inner transom wall,
- bonding the turned-in side lips to the side walls of the boat hulls,
- the rear inner transom wall having a top lip that is turned back towards the rear of the boat hull,
- bonding the turned back top lip to the rear outer transom wall,
- and allowing the foam core to cure.
15 more elements
A method of making a boat transom comprising the steps of
- forming a hull having a rear outer transom wall by applying successive layers of an outer smooth coating, resin and fibers to a female mold, and allowing the hull to cure,
- separately forming a rear inner transom wall by applying successive layers of an inner smooth coating, resin and fibers to a male mold and allowing the inner wall to cure,
- attaching the rear inner transom wall to the inside of the hull at a position spaced away from the rear outer transom wall and eliminating the need for a removable mold for establishing a chamber of the proper thickness into which is to be deposited a syntactic foam and eliminating the necessity for providing means of providing a temporary, leak-proof mold attached to the hull,
- injecting a syntactic foam consisting essentially of a plurality of microspheres encapsulated in resin into the space between the rear inner transom wall and the rear outer transom wall to form a syntactic foam core between them,
- said space having an open top and said injecting being done from the top of the space,
- inserting the syntactic foam into the space from the top by injection means through a hollow wand having a discharge end,
- lowering the discharge end of the wand to the bottom of the space to begin the injection process,
- withdrawing the wand at a rate to allow its discharge end to remain slightly above the rising level of the liquid syntactic foam,
- thereby insuring complete filling of the space while avoiding trapping air bubbles,
- the bottom portion of the rear inner transom wall having a bottom lip that is turned in toward the bow of the boat hull and is generally perpendicular to the rear inner transom wall,
- bonding the turned-in bottom lip to the bottom wall of the boat hull,
- the side portions of the rear inner transom wall having side lips that are turned-in toward the bow of the boat hull and are generally perpendicular to the rear inner transom wall,
- bonding the turned-in side lips to the side walls of the boat hulls,
- the rear inner transom wall having a top lip that is turned back towards the rear of the boat hull,
- bonding the turned back top lip to the rear outer transom wall,
- and allowing the foam core to cure,
- the pre-molded rear inner transom wall becoming part of the mold for the syntactic foam core,
- and the pre-molded rear inner transom wall becoming a permanent part of the boat to eliminate the need for a removable mold for the syntactic foam core which would require difficult means of temporary, leak-proof attachment to the hull.
15 more elements
Dependencies are inferred from the claim text.