Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1995-07-10
1998-02-03
Walberg, Teresa J.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219528, 219544, 219549, 138 33, 26417124, 264299, 2643281, H05B 358, B29B 700
Patent
active
057147388
ABSTRACT:
The flexible insulated heater includes a heater mat surrounded by an insulation jacket. The heater mat is preferably made of two layers of fiberglass reinforced rubber sheets laminated together with resistive heater wires sandwiched between the laminated sheets. The heater mat is formed with a curvature and size to fit snugly around the peripheral surface of the pipe that is to be heated. A jacket of thermally insulative material, such as a polymer foam, is molded over the external surface of the heater mat. The insulated jacket holds the heat generated by the heater mat from escaping radially outward, and it protects against burns to persons who might touch the heater. The mat and the jacket are configured so that the heater has interfacing opposite edges and that meet and preferably touch each other when the heater is mounted on the pipe, but the combination of the mat and jacket have sufficient resilient flexibility to allow opening the heater by separating the edges enough to slip the heater over the pipe, whereupon the heater resumes its original inherent cylindrical shape when released. Snaps, Velcro.TM. fastening material straps, or other suitable fasteners can be used to secure the heaters snugly around the pipe, if desired, although the biased resilience of the heater to its formed shape is generally sufficient itself to hold the heater in place. A power cord, control cavity, and an optional overmold provide electric power to the heating wires or elements in the heating mat. A system of flexible insulated heaters can be daisy-chained or ganged together to heat and insulate a network of pipes.
REFERENCES:
patent: 2531958 (1950-11-01), Williams, Jr. et al.
patent: 3331946 (1967-07-01), Bilbro
patent: 3535494 (1970-10-01), Armbruster
patent: 3547725 (1970-12-01), Shomphe et al.
patent: 3807458 (1974-04-01), Royston
patent: 3853443 (1974-12-01), Grillos
patent: 3876355 (1975-04-01), Baughmann
patent: 3900654 (1975-08-01), Stinger
patent: 4281238 (1981-07-01), Noma et al.
patent: 4329569 (1982-05-01), Hjortsberg et al.
patent: 4384905 (1983-05-01), Gros
patent: 4429213 (1984-01-01), Mathieu
patent: 4447377 (1984-05-01), Denton
patent: 4523141 (1985-06-01), Thomas et al.
patent: 4549069 (1985-10-01), Oge
patent: 4558210 (1985-12-01), Leary
patent: 4925605 (1990-05-01), Petronko
patent: 4930543 (1990-06-01), Zuiches
patent: 5236765 (1993-08-01), Cordia et al.
patent: 5286952 (1994-02-01), McMills et al.
"Heated Pumping Lines," VacuComp HPS Division MKS Instruments, Inc., Series 43 (Apr. 1994).
"Silicone Rubber Heaters Offer Imaginative Solutions to Design Problems," Jim Ebert, Lonny Aylsworth, Ray McBee, Watlow Electric Mfg. Co., Reprinted from Design News, Oct. 22, 1984.
Descriptions of Seven Prior Art Products.
Hauschulz Dana S.
Hilton Daniel E.
Allison Scott B.
MKS Instruments Inc.
Valencia Raphael
Walberg Teresa J.
Watlow Electric Manufacturing Co.
LandOfFree
Apparatus and methods of making and using heater apparatus for h does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and methods of making and using heater apparatus for h, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and methods of making and using heater apparatus for h will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-664745