Electrical heating
First Claim
Patent Images
1. A heating system for an area having a generally horizontal support surface, said area comprising:
- a longitudinally-extending duct below said support surface,a generally flat plate of heat conducting material forming the top of said duct and being mounted so that the top surface of said plate forms a portion of and is generally coplanar with other portions of said support surface; and
,an electric sheet heater mounted within said duct in face-to-face engagement with the underside of said plate and extending a major portion of the width of said duct, said duct and said heater being arranged to provide a heat flow passage within said duct below said heater.
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Accused Products
Abstract
A truck trailer or similar bulk storage area is heated by providing electrical resistance heaters in longitudinally-extending metal ducts extending from and to a short distance below the floor level. Electrical sheet resistance heaters are attached to the underside of the metal plate forming the duct top, each duct is placed between a longitudinally-extending pair of wooden floor boards, and a pair of ducts are placed side-by-side near each edge of the trailer bed or floor of the storage area.
19 Citations
22 Claims
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1. A heating system for an area having a generally horizontal support surface, said area comprising:
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a longitudinally-extending duct below said support surface, a generally flat plate of heat conducting material forming the top of said duct and being mounted so that the top surface of said plate forms a portion of and is generally coplanar with other portions of said support surface; and
,an electric sheet heater mounted within said duct in face-to-face engagement with the underside of said plate and extending a major portion of the width of said duct, said duct and said heater being arranged to provide a heat flow passage within said duct below said heater. - View Dependent Claims (2, 3, 4, 5)
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6. A heating system for an area having a generally horizontal support surface, said area comprising:
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a longitudinally-extending duct below said support surface, a generally flat plate of heat conducting material forming the top of said duct and being mounted so that the top surface of said plate forms a portion of and is generally coplanar with other portions of said support surface; an electric heater mounted within said duct; and longitudinally-extending members of relatively heat-insulating material positioned along and engaging the opposite longitudinally-extending sides of said duct.
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7. A heating system for a storage area having a floor comprising a plurality of longitudinally-extending floor members positioned such that the top surfaces of said members are generally coplanar, said system comprising:
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a longitudinally-extending metal duct of generally rectangular transverse cross-section positioned between a pair of said floor members such that the bottom of said duct defines a generally horizontal surface spaced below the plane of the top surface of said floor members; a longitudinally-extending metal plate forming the top of said duct, the top of said plate being generally coplanar with the top surfaces of said floor members; and a longitudinally-extending electric heater mounted within said duct in contact with the underside of said plate, said duct defining a longitudinally-extending heat flow passage below said heater having a transverse cross-sectional area of not less than 0.001 sq. ft. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 22)
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18. A heating system for a storage area having a floor comprising a plurality of longitudinally-extending floor members positioned such that the top surfaces of said members are generally coplanar on said system comprising:
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a longitudinally-extending metal duct of generally rectangular transverse cross-section positioned between a pair of said floor members such that the bottom of said duct defines a generally horizontal surface spaced below the plane of the top surfaces of said floor members; a longitudinally-extending metal plate forming top of said duct, the top of said plate being generally coplanar with the top surfaces of said floor members; and a longitudinally-extending electric heater mounted within said duct closely adjacent the underside of said plate, said duct defining a longitudinally-extending heat flow passage having a transverse cross-sectional area of not less than 0.001 sq. ft., and said plate having a width at least two inches greater than the width of said duct and being centered substantially longitudinally of said duct, the portions of said plate that extend beyond the opposite sides of said duct being supported by said floor members. - View Dependent Claims (19)
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20. A heating system for a storage area having a floor comprising a plurality of longitudinally-extending floor members positioned such that the top surfaces of said members are generally coplanar on said system comprising:
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a longitudinally-extending metal duct of generally rectangular transverse cross-section positioned between a pair of said floor members such that the bottom of said duct defines a generally horizontal surface spaced below the plane of the top surfaces of said floor members; a longitudinally-extending metal plate forming top of said duct, the top of said plate being generally coplanar with the top surfaces of said floor members; and a longitudinally-extending electric heater mounted within said duct closely adjacent the underside of said plate, said duct defining a longitudinally-extending heat flow passage having a transverse cross-sectional area of not less than 0.001 sq. ft., and comprising a generally channel-shaped in transverse cross-section member having a pair of flanges extending outwardly from the opposite top edges thereof, said flanges being positioned in recesses in said floor members adjacent the opposite sides of said ducts and underlying portions of said plate. - View Dependent Claims (21)
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Specification