Thermally insulated electrically heated hose for transmitting hot liquids
US4553023A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1984 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Jan 11, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6606
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flexible heated hose for transporting molten adhesive from a melter to a dispenser. The hose comprises a Teflon tube contained within stainless steel braided wire and fitted with conventional hydraulic fittings at each end. The braided tube is encased within a multiple ply covering which includes a first layer of fiberglass tape around which are wound electrical resistance heating wires, a resistance temperature detector, electrical leads including a ground wire, and two plies of helically wound fiberglass tape, with a layer of helically wound Aramid fiber, two layers of helically wound polyester felt, and a layer of helically wound vinyl tape covering the same. The heating wires, electrical leads, and temperature detector are adhesively secured to the first layer of fiberglass tape which is in turn adhesively secured to the stainless steel braided wire covering the Teflon tube. In a modified embodiment, the ground wire is wound separate from the other electrical leads. A braided polyester cover forms the exterior of the hose, with hard molded plastic cuffs attached to the ends of the hose. The electrical leads to the heating wires, temperature detector and dispenser extend radia…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.