Sigurd Frohlich

US Patent:

6414278, Jul 2, 2002

Filed:

Mar 21, 2000

Appl. No.:

09/531721

Inventors:

Sigurd Frohlich - San Diego CA 92154
Richard M. Schneider - San Diego CA 92154
Abel Olivera - San Diego CA 92154

International Classification:

A47J 5902

US Classification:

219399, 219387, 219428

Abstract:

A pizza warmer and oven system in which a plurality of pizza warmers containing a phase change material can be charged to their preferred temperatures by resistance heaters positioned in shelves above and below each warmer in an oven. One embodiment has top shelves biased in close proximity with the warmers. Moving a lever causes the upper shelves to be raised by cams, allowing removal or insertion of warmers. Insertion of warmers into the oven trips switches, starting timing circuits which energize the heater and charging indicator lights. At the end of the timing cycle, indicator lights signal the warmers charged condition. In another embodiment, the top shelves are gravitationally biased down but are each free to move upward slightly for warmer insertion or removal. Turning on the oven energizes the heaters. A thermostat in the heater circuit turns off the heater at a pre-selected temperature.

US Patent:

55282199, Jun 18, 1996

Filed:

Apr 28, 1994

Appl. No.:

8/234572

Inventors:

Sigurd Frohlich - San Diego CA
Hans Koellner - Santa Barbara CA
Reinhold Zauner - Bregenz, AT
Georg Schurian - Kelowna, CA

Assignee:

Konrad Doppelmayr & Sohn - Wolfurt

International Classification:

G08B 2100

US Classification:

340540

Abstract:

Sensors distributed along a ropeway communicate with a base station and preferably a base station computer. One type of sensor detects and signals cable misalignments from a normal line of cable traction. Preferably each cable tower has at least one such sensor. Another type of sensor is mounted on a sheave assembly and detects vibrations characteristic of disintegration within the assembly. It produces a sheave problem signal whenever such occurs. Preferably there is one vibration sensor mounted on each sheave assembly. Another type of sensor is preferably mounted on each ropeway carrier for detecting and signaling excessive swings. The sensor signals are communicated to a cable operator so that remedial action can be taken. Each carrier sensor has an RF transmitter for broadcasting its signals to RF receivers mounted on cable towers. Interface units local to sensor groups relay their signals to a base station computer that provides corresponding indicators to the cable operator.

US Patent:

61084891, Aug 22, 2000

Filed:

Mar 15, 1999

Appl. No.:

9/268225

Inventors:

Sigurd Frohlich - Escondido CA
Hans Jochen Koellner - Santa Barbara CA
Ival Salyer - Dayton OH

Assignee:

Phase Change Laboratories, Inc. - San Diego CA

International Classification:

F24H 700
H05B 360

US Classification:

392346

Abstract:

A heating device for food and other products is provided. The device includes a unit containing a rechargeable phase change material which is capable of being charged with heat energy by a heat source such as a conduction, convection, radiant heat, electrical resistance, electrical inductance, microwave, or radio frequency. The phase change material may be provided in a variety of forms and may comprise linear alkyl crystalline alkyl hydrocarbons, alkyl hydrocarbon waxes, crystalline fatty acids, linear crystalline primary alcohols, ethylene copolymers, polyethylene, polyethylene glycol, polyethylene oxide, and acetamide.

US Patent:

58840060, Mar 16, 1999

Filed:

Oct 17, 1997

Appl. No.:

8/954318

Inventors:

Sigurd Frohlich - San Diego CA
Hans Jochen Koellner - San Diego CA

International Classification:

H05B 360

US Classification:

392339

Abstract:

A rechargeable phase change material unit is provided. The unit comprises a first shell portion and a second shell portion forming a hollow shell defining a cavity. At least one layer of a phase change material is disposed in the cavity of the shell. The phase change material is capable of being charged with heat energy. A heater assembly is positioned on one side of the layer of phase change material. The heater assembly is provided to charge the phase change material with heat energy and distribute heat energy throughout the layer of phase change material during the charging of the phase change material.