Abstract A flexible immersion heater assembly which permits fabrication of any desired length heater in the field includes a fluid impermeable flexible tube of non-metallic resilient material containing a section of flexible insulated electrical resistance wire. One end of the tube is telescoped over a frustoconically ribbed nipple on a hose fitting. The other end of the tube is suitably closed by a ribbed plug or a bonded pinch seal. Electrical leads to the resistance wire extend through the hose fitting and sealant means are provided for sealing the leads relative to the fitting. A thermostatic switch or a thermocouple are provided for controlling the heater in response to temperature changes. The heater assembly is adapted to be inserted in pipes, conduits and tanks.
Inventors
👤 A Booker
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-25 16:24
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/82
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
In a flexible immersion heater, the combination of: a hose fitting having a nipple provided at one end with frustoconical annular ribs and means for connection to a support fitting; an elongated, liquid impermeable tube of a resilient nonmetallic material and having one end telescoped over said annular ribs; means sealing the other end of said tube, said means including a plug element having an adapter-type end portion having frustoconical annular ribs, said end portion being inserted in said other tube end so as to seal the end of said tube; an elongated, insulated, flexible electrical resistance wire within said tube and extending lengthwise thereof; electrical leads extending through said hose fitting and respectively connected to the ends of said resistance wire; and sealant means in said hose fitting sealing said leads relative to said hose fitting.
Claim 2
Dependent Claim
137 words
In a flexible immersion heater, the combination of: a hose fitting having a nipple provided at one end with frustoconical annular ribs and means for connection to a support fitting; an elongated, liquid impermeable tube of a resilient nonmetallic material and having one end telescoped over said annular ribs; means sealing the other end of said tube, said means including a plug element having an adapter-type end portion having frustoconical annular ribs, said end portion being inserted in said other tube end so as to seal the end of said tube; an elongated, insulated, flexible electrical resistance wire within said tube and extending lengthwise thereof; electrical leads extending through said hose fitting and respectively connected to the ends of said resistance wire; and sealant means in said hose fitting sealing said leads relative to said hose fitting.
Claim 3
Dependent Claim
42 words
The flexible immersion heater described in claim 1, further including a thermocouple element mounted in said plug element; two flexible, electrically insulated wires electrically connected to said thermocouple element and running the length of said tube and extending through said hose fitting.