Cooktek Induction Systems, LLC

Woodhead Industries, Inc.

Turbochef Technologies, Inc.

Cooktek LLC

Warren S Graber

Reinhard Metz

Robert J Visher

Horacio A Baggio

Kevin J Snyder

James K Pool

An induction cooking system including a first shell including a first housing, a first plate coupled to the first housing, and a first induction coil within the first housing. The induction cooking system also includes a second shell coupled to the first shell, the second shell including a second housing, a second plate coupled to the second housing, and a second induction coil within the second housing. The induction cooking system further includes a first temperature sensor for sensing a first plate temperature, a second temperature sensor for sensing a second plate temperature, and a controller. The controller is configured to receive the first plate temperature, receive the second plate temperature, adjust a first current supply to the first induction coil based on the first plate temperature, and adjust a second current supply to the second induction coil based on the second plate temperature.

Clamshell induction cooking system

A device, system and method for induction heating food service pans having differing depths, while maintaining the pans sufficiently closely adjacent an enclosure containing the induction heating power source.

Induction-based food holding/warming system and method with height adjustment mechanism

A system and method for measuring the temperature of cookware to be induction-heated, using an infrared temperature sensor. An induction heater countertop may include a viewing window between the infrared temperature sensor and the cookware. Various algorithms may be applied to the sensed temperature, to adjust it to account for the presence of the viewing window, as well as variations in the cookware material.

IR temperature sensor for induction heating of food items

A system for holding and warming food includes a container for holding and warming food. The container consists of 300-series stainless steel. The system further includes an induction heating unit with an induction heating circuit for induction heating the container. The induction heating circuit includes a 120 volt induction coil having 40 or more turns. The induction heating circuit operates at a frequency greater than 30 kilohertz.

Induction-based food holding/warming system and method

A system and method for holding and warming food held in pans or trays having a low relative magnetic permeability, such as 300-series stainless steel, using induction heating.

A method for holding and warming food. The method includes the steps of: using a container formed of 300-series stainless steel, wherein the container is formed by a cold working process; and applying to the container a magnetic field from an induction coil, wherein the magnetic field is sufficient to induce a current in the container to heat the container.

An apparatus, system and method for warming food by controlled heating of heat retention objects such as cookware items or pellets located on a trivet positioned on a countertop, using heating control units, such as induction heating units, remotely located beneath the countertop. The preferred trivet insulates the countertop against damages, and also includes circuitry enabling the indication or display of its proper positioning on the countertop, and also indicating whether the heating unit is heating the heat retention object.

Food warming device and system

A power transfer system for imparting power to at least one functional element, such as a movable glass-containing functional element, such as a sliding glass door. The power transfer system preferably includes a magnetic induction power transfer mechanism with a power transfer circuit having first and second separated coils, and a resonant circuit power driver having a resonant frequency. The power transfer mechanism is designed to apply power to the functional element and/or to other devices or systems connected to it. The power transfer system may include an electronic feedback mechanism with an electronic feedback circuit for sensing a predetermined condition concerning the functional element. To take one example, the electronic feedback circuit may be used to provide safety door detection feedback by sensing the position of a movable glass portion of sliding glass doors, and by relaying a feedback signal, which may be carried by a light wave, to the power transfer mechanism if the movable glass portion of the doors is determined to be in a closed position. A data link may be used to communicate information between the power transfer circuit and the functional element.

Wireless power transfer system for glass

A portable fluorescent string lamp has a base which includes a threaded nut at each end. An electrical cord extends through each nut. A mounting bracket has a back and two legs spaced to receive the fixture. Each of the legs is releasably secured to the base of the fixture by tightening the coupling nut against it. The back of the bracket is designed to receive a pair of magnetic couplers for removably mounting the fixture to a structure such as a machine.

Portable string hand lamp with removable mount

A wide area lamp for use in hazardous locations includes a metal halide lamp excited by a ballast. The lamp is mounted within an explosion-proof transparent globe and metal lamp guard secured to a metal vault. The vault is divided into two compartments. One compartment houses a ballast for the lamp. That compartment is filled with a potting compound to eliminate any arcing in the high voltage excitation circuit. The other compartment is enclosed, but accessible for making necessary electrical connectors to a power feed cord.

Wide area light fixture for hazardous locations

A fluorescent tube lighting fixture includes a tubular main frame member which also acts as a conduit for routing wires between the ballast and the lamp holders. A frame extension the form of a Tee is threaded onto one end of the main frame member; and another portion of the Tee receives an adapter which secures the end cap to the fixture. Wire is routed through the adapter, and through the Tee into the main tubular frame member, all of which portions cooperate to act as a protective conduit for the power cord, with a single opening in the end cap. By removing a single compression nut, the end cap and lamp guard can be moved to gain access to the interior of the lamp for maintenance.

Tube light with fluorescent lamps

A fluorescent lamp for use in special applications includes an electrodeless envelope of glass or other light transmissive material carrying fluorescent material within the envelope. An RF energy source and coupler are embedded in epoxy as an integral power unit, thereby isolating the power unit from the hazardous environment. The power unit and the envelope are shaped in complementary form such that the coupler and envelope are in energy-transfer relation to excite the lamp, but the envelope may be removed from the power unit to re-lamp the fixture.

Portable fluorescent lamp for use in special applications

A portable electric lamp suitable for use in hazardous locations includes a fixture which is purged continuously with air during operation. Pressurized air is introduced at an input end of the fixture, through a plenum which establishes a generally laminar flow of air through the fixture during purging. To insure that the fixture is satisfactorily purged before power is applied to the lamps, differential pressure is measured over a precision orifice at the discharge end of the lamp, and total flow is determined. During the start-up cycle, pressure within the fixture must exceed a predetermined minimum threshold; but following start-up, the operating pressure may drop lower than the initial minimum pressure, as long as a positive pressure is maintained within the fixture.

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Hoffman Estates, IL, United States of America

Warren S Graber