Pressure Responsive Patents (Class 219/496)
  • Patent number: 10905278
    Abstract: Systems to allow temperature control more precise and accurate than the current state of the art for consumer products that heat liquids such as, without limitation, coffee makers, tea makers, electric kettles and espresso machines. One feature of such systems may include the ability to calibrate the system with reference to a known temperature point. Another feature of such system may allow reduction in the rate of water heating to allow the temperature of the water to approach a target temperature in a gradual manner.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 2, 2021
    Inventor: Joseph Behm
  • Patent number: 9528722
    Abstract: A fluid heater for heating fluid at high pressure may comprise a containment vessel with a base portion having a primary face with a peripheral surface section having a substantially frusta-conical shape. The vessel may comprise an elongated main portion having a perimeter wall with a thickness and terminating with a base edge surface. The base edge surface may have a substantially frusta-conical shape such that the base edge surface and the peripheral surface section collectively form a weld receiving groove. A width of the peripheral surface section of the primary face of the base portion may be greater than the thickness of the perimeter wall of the main portion.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: December 27, 2016
    Assignee: Sioux Corporation
    Inventors: Eric Hansen, John W. Finger, Brad Hyronimus
  • Patent number: 9494311
    Abstract: A flow heater is provided including a heating element, a channel heated by said heating element for heating liquid flowing therethrough, and temperature sensing means in thermal communication with both the heating element and the channel so as to be sensitive to the temperature of the liquid in the channel and the temperature of the heating element.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: November 15, 2016
    Assignee: Strix Limited
    Inventors: Colin Peter Moughton, Alan Campbell Owen, Jonathan Michael White
  • Patent number: 9006618
    Abstract: A combined seat heater and capacitive occupancy sensor comprises a heating element (10) connected between a first (21) and a second (22) node, and a capacitive sensing network connected to the heating element to apply an oscillating voltage thereto and to derive the capacitive load of the heating element. A common mode choke (16) connects the first and second node to a third (23) and fourth (24) node, respectively. The capacitive sensing network comprises an oscillator (28), AC-coupled to the third and/or the fourth node to drive oscillating voltage into that node, and a transimpedance amplifier (32), which has a first input to receive the oscillating voltage as reference voltage and a second input operatively connected to the heating element. The transimpedance amplifier maintains a voltage on its second input equal to the reference voltage by driving a current into the second input. An output signal (44) indicates the AC component of the current driven into the second input.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: April 14, 2015
    Assignee: IEE International Electronics & Engineering S.A.
    Inventors: Laurent Lamesch, Aloyse Schoos
  • Patent number: 8952299
    Abstract: A dual resistance heater for a phase change material region is formed by depositing a resistive material. The heater material is then exposed to an implantation or plasma which increases the resistance of the surface of the heater material relative to the remainder of the heater material. As a result, the portion of the heater material approximate to the phase change material region is a highly effective heater because of its high resistance, but the bulk of the heater material is not as resistive and, thus, does not increase the voltage drop and the current usage of the device.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: February 10, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Yudong Kim, Ilya V Karpov, Charles C. Kuo, Greg Atwood, Maria Santina Marangon, Tyler A. Lowrey
  • Patent number: 8909033
    Abstract: A method is provided for interconnecting a single electrical heating element of a hot water heater to first and second AC electrical power sources. Typically, these first and second AC electrical power sources include a utility provided electrical power source and a renewable power source that generates AC power from DC power. The method includes operating a controller that selectively connects and disconnects the first and second power sources. If sufficient electrical power is available from the renewable power source, the utility provided electrical power source may be disconnected to preferentially utilize renewable energy.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: December 9, 2014
    Inventor: David Kreutzman
  • Publication number: 20140341552
    Abstract: An espresso machine with improved fluid and thermal control is disclosed. The machine can include a controller for feedback pressure control of vibratory solenoid pumps. The controller can monitor pump pressure and/or volume and provide real-time feedback control of the pump pressure and/or volume. The controller can control pump output by means of a direct current, variable frequency square wave, which can be regulated to maintain a desired pressure output. The controller can also control pump output by means of a direct current, variable pulse width square wave. The espresso machine can also include a thermoblock with improved thermal efficiency and temperature control. The thermoblock can comprise a one or more serpentine pathways to improve thermal transfer to the fluid therein. The thermoblock can also provide feedback control of the temperature of the fluid.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Applicant: ZPM Ltd. Co.
    Inventors: Igor Zamlinksy, Gleb Polyakov
  • Patent number: 8383994
    Abstract: A transparency, e.g. an aircraft laminated windshield, includes one or more sensors to monitor performance of one or more properties, e.g. a heating arrangement of the windshield, and to generate signals representative of the performance of the properties. One part of a connector, external of the transparency and connected to the sensors is connected to a system positioned in the aircraft. The system receives a signal from each of the sensors, and processes the signals to determine difference between performance of the property as indicated by the signal received and a preferred performance of the property to provide real time monitoring of the performance of the windshield. With this arrangement information regarding the performance of the windshield is available to schedule timely repair or replacement of the windshield that is performing outside of acceptable limits.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 26, 2013
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Ali N. Rashid, Monroe A. Stone, James F. Priddy
  • Patent number: 8138454
    Abstract: A liquid warming device for heating sterile fluids in a removable basin is described with emphasis on the properties of the basin interaction with the liquid warming device and with a drape that works with the basin to maintain a sterile field above the drape and the top of the basin. Also disclosed are various desirable aspects for a control system for a liquid warming device.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: March 20, 2012
    Assignee: C Change Surgical LLC
    Inventors: Patrick Kammer, Kevin Joseph Rackers
  • Patent number: 8084716
    Abstract: An open forklift truck is provided having an elongated windshield that protects the operator from wind chills experienced when operating the truck in a cold storage environment. The windshield is a laminate having a plurality of heating elements disposed therein that are electrically connected to a control that monitors speed, battery voltage, temperature, and ambient feedback and adjusts the power supply to the windshield based on this feedback. Accordingly, the windshield is maintained at a predetermined temperature selected to limit condensation and fogging of the windshield.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: December 27, 2011
    Assignee: The Raymond Corporation
    Inventor: Richard M. Day
  • Patent number: 8028653
    Abstract: A filament post used in plasma-enhanced chemical vapor deposition has an outer shell and an inner post. An electrical potential is applied only to the inner post to ensure that there is no impact on the plasma density and the carbon film properties. The inner post and the outer shell are electrically insulated by ceramic insulators, such that no electrical potential is applied to outer shell. The stress generated in the carbon film is directly related to the electrical potential of the surface to which the film is deposited. The carbon film deposited on the outer shell of the post is not highly stressed, which significantly reduces film delamination from the filament post surfaces.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: October 4, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Eric Hwang, Jinliu Wang, Richard Longstreth White
  • Patent number: 8008604
    Abstract: A portable, low profile electric radiant heater has an elongated heating element. A plurality of thermistors are disposed proximate to and along the length of the elongated heating element, spaced at substantially equal intervals. A microcontroller switches a reference resistor in series with a charging capacitor to determine a reference timer value. The microcontroller switches banks of multiple thermistors in series with the charging capacitor to determine associated timer values. The microcontroller calculates thermistor resistance values using the reference timer, reference resistor, and thermistor timer values. A lookup table is employed to determine a temperature value associated with the thermistor resistance value. This serves as the sensed temperature of the associated bank of thermistors. A plurality of tip-over switches are provided. One tip-over switch is disposed between the microcontroller and the heating element.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: August 30, 2011
    Assignee: Honor Tone, Ltd.
    Inventor: Him Chung Tsang
  • Patent number: 7996182
    Abstract: A water heater is provided with monitor/diagnostic display apparatus that selectively provides a user with visual or other type of indicia of the overall efficiency of the water heater. The apparatus includes a monitoring unit that may be mounted on the water heater, and a display unit that may be mounted either on the water heater or remotely therefrom.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: August 9, 2011
    Assignee: Rheem Manufacturing Company, Ltd.
    Inventors: Bruce A. Hotton, Walter T. Castleberry
  • Patent number: 7818095
    Abstract: A water heater is provided with monitor/diagnostic display apparatus that selectively provides a user with visual or other type of indicia of the remaining hot water availability of, the recovery time for, and the overall efficiency of the water heater. The apparatus includes a monitoring unit that may be mounted on the water heater, and a display unit that may be mounted either on the water heater or remotely therefrom.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: October 19, 2010
    Assignee: Rheem Manufacturing Company
    Inventors: Bruce A. Hotton, Troy E. Trant, Jozef Boros, William T. Harrigill, Walter T. Castleberry
  • Patent number: 7718926
    Abstract: In order to detect a change in the temperature of a substrate (2) and a change of the distribution of oxygen radical concentration near a surface of the substrate (2), a lamp power in each zone of a heater (3) and a pressure in a reactor (1) are measured, the measured lamp power in each zone of the heater (3) and the measured pressure in the reactor (1) are inputted to the prediction equation of process model of a monitoring device (16)to predict the thickness profile of the substrate (2), and it is decided whether an abnormality occurs in thermal processing on the substrate (2) based on the predicted thickness profile.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: May 18, 2010
    Assignee: Panasonic Corporation
    Inventors: Yutaka Matsuzawa, Wataru Nishida, Hideaki Mito, Yoshinori Takamori
  • Patent number: 7659493
    Abstract: A fluid heating system includes a fluid receptacle having a fluid reservoir, and a heating control system configured to heat fluid retained within the fluid reservoir. The heating control system includes a processing unit, at least one fluid temperature sensor positioned on or within the fluid receptacle, a heating element configured to heat fluid within the fluid reservoir, and a power switch disposed within an electrical path between the heating element and the processing unit. The processing unit is configured to selectively activate and deactivate the heating element through the power switch based on the fluid temperature detected by the fluid temperature sensor.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: February 9, 2010
    Assignee: Allied Precision Industries, Inc.
    Inventors: Thomas K. Reusche, Philip E. Chumbley
  • Publication number: 20100024258
    Abstract: A steam generating apparatus (20) is described, comprising a boiler (24) provided with electric heating means (25) and current controlling means (33, 40; 37) for controlling the current in the heating means; the apparatus further comprising at least one temperature sensor (34) and a pressure sensor (35); the apparatus being capable of generating steam at a variable steam output rate; wherein the controlling means (33, 40; 37) are designed, at a relatively low steam output rate setting, to control the current in the heating means on the basis of a temperature measurement signal (T) from the temperature sensor (34), and wherein the controlling means (33, 40; 37) are designed, at a relatively high steam output rate setting, to control the current in the heating means on the basis of pressure.
    Type: Application
    Filed: December 21, 2005
    Publication date: February 4, 2010
    Inventors: Tang Pong Har, Adeline Teo, Xiaoming Jia
  • Publication number: 20090277896
    Abstract: A container is provided for heating or otherwise processing the contents of the container. For example, the container may be a kettle or kettle for heating fluids therein. The container may receive a command, desired characteristic or desired range for processing the contents of the container. The container may further include at least one sensor such as a temperature sensor or pressure sensor for determining a corresponding characteristic of the contents of the container. Based on at least one determined characteristic and/or the input command, the container may heat or otherwise process the contents therein. The results and/or current status of the contents may further be provided through a display. Also, based on the current status of the contents, the container may further process/heat the contents or discontinue processing/heating of the contents.
    Type: Application
    Filed: June 29, 2009
    Publication date: November 12, 2009
    Inventor: ANTHONY BROWN
  • Patent number: 7534979
    Abstract: An objective is to provide a pressure-contact type rectifier in which solder that increases the environmental load is not used, and neither burning nor breakage of a rectifying device occurs, even if temperature of the rectifying device increases due to current flowing or force towards outside the rectifying device is applied to a lead end, etc. By providing an electrically conductive friction reducer on at least one electrode face of the rectifying device, the temperature increase can be prevented, and the friction at the contact face can be reduced. Moreover, by providing a flexible portion on the lead end outside a cap, and fixing the flexible portion to the cap, the contact area between the lead and the rectifying device can be kept constant. As a result, a pressure-contact type rectifier in which neither burning nor breakage of the rectifying device occurs can be obtained.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: May 19, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinichi Ito, Shigeki Maekawa, Hiroya Ikuta, Shigeharu Nagai, Toshiaki Kashihara, Shinji Iwamoto, Takahiro Sonoda
  • Patent number: 7435929
    Abstract: Methods for monitoring a heat treating atmosphere supply a preselected gas atmosphere at a preselected temperature to a heat treating furnace. The preselected temperature is not greater than a temperature at which wustite (FeO) forms. The methods sense the preselected gas atmosphere and the preselected temperature and compute a computed ratio of gaseous hydrogen H2 (g) to water vapor H2O (g) for the preselected atmosphere as a function of the sensed values.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: October 14, 2008
    Assignee: Furnace Control Corp.
    Inventors: Robert N. Blumenthal, Andreas T. Melville
  • Patent number: 7411163
    Abstract: The invention relates to a device (1) for providing a melt, in particular a plastic melt. Said device (1) comprises a feed unit (2) for material components, at least one purification unit (4) for the flowing melt, in particular a rotatable screening disc (5), and at least one sensor unit (17; 18; 19; 20; 21) for detecting one or more process parameters. The operation of the purification unit (4) can be influenced with the aid of said sensor unit, based on the filter-specific process data. The inventive device is configured in such a way that at least the type and dosage of the process materials that are supplied via the feed unit (2) and/or the processing parameters of said process materials can be controlled using the detected (17; 18; 19; 20; 21) process parameters and/or the filter-specific process data.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: August 12, 2008
    Assignee: Gneuss Kunststofftechnik GmbH
    Inventor: Detlef Gneuss
  • Patent number: 7297907
    Abstract: The present invention discloses a novel active insulation device and method for thermally shielding an external body from temperature fluctuations of a contained body. The method comprising providing an active thermal insulation envelope between the contained body and the external body; regulating the heat transfer from the active thermal insulation envelope to the external body; and regulating the heat transfer from the contained body to the active thermal insulation envelope, thus maintaining the temperature of the external body at a constant temperature or within a narrow temperature range.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: November 20, 2007
    Inventors: Uri Rapoport, Ehud Katznelson
  • Patent number: 7193189
    Abstract: Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2 (g) to water vapor H2O (g) in the atmosphere. The systems and methods use the process variable, e.g., to control the atmosphere, or to record or display the process variable.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: March 20, 2007
    Assignee: Furnace Control Corp.
    Inventors: Robert N. Blumenthal, Andreas T. Melville
  • Patent number: 7053341
    Abstract: A method for controlling the level of a drum in a drum-type boiler includes adjusting a gain of a drum level PID (such as a Proportional Integral Derivative control) in accordance with a signal representative of a set of tuning constants, a signal representative of drum level, and a signal representative of a drum level setpoint. The method also includes utilizing a flow control PID to adjust a drum level control valve, wherein the flow control PID adjusts the drum level control valve in accordance with an output of the drum level PID, a signal representative of steam flow, and a signal representative of drum feedwater flow.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: May 30, 2006
    Assignee: General Electric Company
    Inventors: Manu Dev Arora, Leroy Omar Tomlinson, Raub Warfield Smith, Bruce Gordon Norman, Matthew Lennon
  • Patent number: 6894253
    Abstract: A control unit (3) for controlling an electric household appliance, e.g. a refrigerator, is connected in series with a positive temperature coefficient (PTC) resistive unit (4) which, when supplied with electric current, generates sufficient heat to activate a thermally activated actuating element (6) for selectively turning on/off respective auxiliary switches (9) of the electric household appliance. The thermally activated actuating element (6) includes a temperature-deformable element (7), e.g. a bimetallic plate, the deformation of which is transmitted by kinematic links (10) to a camshaft (8), the cams (12) of which cooperate with the auxiliary switches (9) of the electric household appliance to selectively turn on/off the auxiliary switches (9).
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: May 17, 2005
    Assignee: ITW Industrial Components S.r.l.
    Inventor: Raoul Bianchi
  • Patent number: 6795644
    Abstract: A water heater including a water tank, a water inlet line for adding water to the water tank, a water outlet line for withdrawing water from the water tank, at least one electric resistance heating element extending into the water tank to heat water in the water tank, at least one water temperature sensor operable to sense a water temperature, and a control circuit capable of conducting electric power to the electric resistance heating element. The control circuit controls the conduction of electric power in response to the sensed water temperature and at least one of an element characteristic, a tank characteristic, an external water tank temperature, a water consistency, an ambient temperature, and a history of water use.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: September 21, 2004
    Inventor: Kenneth A. Bradenbaugh
  • Patent number: 6766835
    Abstract: A hot water tank monitoring system is designed to shut off the water supply to the hot water tank and to shut off either the electrical supply or the gas supply to the heating unit of the hot water tank in response to sensing of malfunction of one or more of a number of different sensed parameters. These parameters include a water leak detector located beneath the water tank, a water level float sensor, a temperature sensor to sense excess temperature, and a pressure sensor located in the line between the pressure relief valve and the blow-out outlet of the water tank. Signals from the various sensors are supplied to a controller, which provides signals to a LED status indicator, and also operates to provide alarm signals through a modem over telephone lines to remote locations and to operate an alarm.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: July 27, 2004
    Inventor: Raoul G. Fima
  • Patent number: 6744022
    Abstract: Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2 (g) to water vapor H2O (g) in the atmosphere. The systems and methods use the process variable, e.g., to control the atmosphere, or to record or display the process variable.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: June 1, 2004
    Assignee: Furnace Control Corp.
    Inventors: Robert N. Blumenthal, Andreas T. Melville
  • Publication number: 20030178411
    Abstract: A steam cooker has an insulated housing that surrounds an internal cooking compartment accessible through a door. In one form, a supply of water is held in the compartment and immerses a plate-like resistance heating element mounted at the floor. Water is automatically added to this supply when both 1) a water level sensor indicates a refill, and 2) a door switch signals that the door is open. these signals together open a normally-closed solenoid valve in a water feed line. A steam outlet located above the maximum water level is in fluid communication with and adjacent another electrically-operated solenoid valve that is normally open to atmosphere. In one mode of operation, a temperature sensor in close physical proximity to the steam outlet and the solenoid valve closes the solenoid wherein the sensed steam temperature is at or above a set level.
    Type: Application
    Filed: September 24, 2002
    Publication date: September 25, 2003
    Inventors: Mark Manganiello, Peter Castrichini, Mark J. Doran
  • Publication number: 20020047006
    Abstract: A control system for bathers includes an electronic controller which controls operation of an electric heater assembly connected in a water flow path for heating water. The heater assembly includes a heater housing and electric heater element. A solid state water temperature sensor apparatus provides electrical temperature signals to the controller indicative of water temperature at separated first and second locations on or within the heater housing. The presence of water in the heater housing is detected electronically, by turning on the heater, and monitoring the temperature sensors for unusual temperature rises or other faults for a period of time thereafter. A solid state water presence sensor apparatus can also be used to determine the presence of water within the heater housing, providing electrical water presence signals to the controller indicative of the presence or absence of a body of water within the heater housing.
    Type: Application
    Filed: June 22, 2001
    Publication date: April 25, 2002
    Inventors: David J. Cline, Cindy Otto, Stefan Daystrom
  • Patent number: 6051819
    Abstract: A method and a device for controlling the temperature of hot tap-water, which is heated on the secondary side of a heat exchanger. In order to achieve a quick response and a good temperature stability, the changes of the temperature and the flow of the hot tap-water are sensed on the secondary side of the heat exchanger, these sensed variations controlling a regulator which in turn controls a setting device regulating the flow on the primary side of the heat exchanger.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: April 18, 2000
    Inventor: Alf Ottosson
  • Patent number: 6002114
    Abstract: A control device installed in an electric water heater to control its operation, the control device including a water temperature control circuit and a power control circuit, the water temperature control circuit being formed of a water temperature detection circuit, which detects water temperature at the water inlet and the water outlet of the electric water heater, a water flow rate detection circuit, which detects the flow rate of water passing through the water inlet, a CPU, an indicator circuit controlled by the CPU to indicate the working conditions of the electric water heater, and a digital display controlled by the CPU to show the value of water temperature at the water outlet, the power control circuit being formed of a power supply circuit, a TRAIC triggering control circuit, which turns on the heating elements of the electric water heater alternatively subject AC phase change, a TRAIC power circuit, which provides the TRAIC triggering control circuit with the base power, an AC phase detection inpu
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: December 14, 1999
    Inventor: Ming-Hsiu Lee
  • Patent number: 5968395
    Abstract: A simple, low-cost, reliable thermoactuator device is described, being capable of taking a plurality of stable working position besides its rest position. One and the same body is associated with at least two thermoactuators whose arrangement is such as to make a movable actuation element capable of taking at least three stable working positions, which are obtained as a function of an electric signal to the supply terminals of either one or the other or both of the thermoactuators.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: October 19, 1999
    Assignee: Eltek S.P.A.
    Inventors: Costanzo Gadini, Fiorenzo Pivetta
  • Patent number: 5948304
    Abstract: A water heater having a water tank and a electric resistance heating element extending into the water tank for heating water in the tank. The water heater includes a proportional band temperature controller for conducting electric power to the electric resistance heating element in bursts. Each burst of electric power is followed by a period during which the temperature controller does not conduct power to the electric resistance heating element. In one embodiment, each burst of electrical power lasts for about 95% or less of a cycle comprised of one burst of electric power followed by the period during which the temperature controller does not conduct electric power.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: September 7, 1999
    Inventor: Kenneth A. Bradenbaugh
  • Patent number: 5948303
    Abstract: A temperature control apparatus for a bed includes at least one heating element, mounted in a resting surface on a mattress of the bed for warming at least a first are(a of the resting area. A temperature sensor is located to detect the temperature of the first area of the resting area, and transmits the information to a central control unit. The central control unit includes a central processing unit which is interconnected with both the heating element and the temperature sensor to adjust the temperature in the first, area of the resting area as desired. The central control unit is also connected to a timer to permit programming of temperature changes as desired. An occupant sensor in the resting surface of the mattress will detect the presence and absence of an occupant, and transmit this information to the central control unit for processing.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: September 7, 1999
    Inventor: Lynn D. Larson
  • Patent number: 5880438
    Abstract: A steam sterilization apparatus (10) includes an electronic control system having a main control circuit (C) including a central processing unit (68), an input device (36), and output devices (24,28) provided on a single circuit board (22) which is attached to a front bezel (16) of the sterilizer (10). The sterilizer (10) includes a flash steam generator (56). The main control circuit (C) implements an over-temperature feedback circuit (160) that disconnects the heating elements (162) in the steam generator (56) from electrical power when an over-temperature condition is detected. Isolated feedback is provided to the central processing unit (68) confirming the heating element disconnection operation. The control system includes error switches (82, 86, 88) that detect various error conditions. Upon an error condition being detected, the steam supply to the steam sterilization chamber (12) and/or to the pressurized steam seal (42) of the apparatus (10) is halted.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: March 9, 1999
    Assignee: Steris Corporation
    Inventors: Mark J. Parrini, David F. McCall, Francis J. Zelina, Terrence L. Lukas
  • Patent number: 5839357
    Abstract: Disclosed is an electric pressure cooker. The electric pressure cooker's food container is locked to its lid by using a driving power of a motor. The inner pressure state of the container can be monitored from the outside, and is automatically discharged when it exceeds a predetermined pressure.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: November 24, 1998
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Kyu Ha, In-Hwan Joo
  • Patent number: 5829069
    Abstract: A jet bath designed to use minimum water, to use a formed in place low cost waterfall type water inlet, to have pulsating and massaging air-water jets appropriately located in the tub, to allow user adjustment of water temperature, to prevent heating the water above 122 degrees Fahrenheit and prevent tripping of a manually resettable high temperature limit switch with initial filling of the tub with overheated water.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: November 3, 1998
    Inventors: Dean W. Morgan, Brad J. Roten
  • Patent number: 5821502
    Abstract: A housing provides temperature monitoring and temperature control of a specimen, while the specimen is being exposed to plasma environments for in-situ reactivity studies or other plasma processing purposes. The housing is adaptable for use with a temperature controller and a pressure measurement device. The housing includes a temperature monitoring mechanism and temperature control connections. The temperature monitoring mechanism provides in-situ specimen temperature indications. It includes a first enclosure having a specimen supporting portion on an exterior surface thereof. A fluid conduit has a first end in fluid communication with an interior portion of the first closure. A second enclosure has an interior portion thereof in fluid communication with a second end of the fluid conduit. The second enclosure includes the ability for attachment to a pressure measurement device.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: October 13, 1998
    Assignee: Boeing North American, Inc.
    Inventors: Ronald E. Lukins, Martin P. Cooksey
  • Patent number: 5500509
    Abstract: A pressure sensing oscillator (12) and temperature sensing oscillator (14) each produce digital, oscillating signals having frequencies varying with respect to the pressure and temperature, respectively, sensed by each. The signals are input into a temperature compensation circuit (16) which effects a temperature compensation of the pressure signal in accordance with the digital temperature signal. The temperature compensated signal is then input into a microprocessor (18) which filters the signal and generates an output signal based on calibration values stored in an EEPROM. The resulting output signal represents a compensated, calibrated pressure signal. The format for the output signal is a pulse width modulated (PWM) signal having a percent modulation indicative of the temperature compensated, calibrated pressure.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: March 19, 1996
    Assignee: Borg-Warner Automotive, Inc.
    Inventor: Carl R. Vogt
  • Patent number: 5191190
    Abstract: A control system, a control device therefor and methods of making the same are provided, the control system comprising a source of energy, an output producing unit that uses the energy to produce the output thereof, a control device having control structure for interconnecting the source of energy to the unit, the control device having a rotatable shaft that sets the control structure in different positions thereof in relation to the rotational set position of the shaft from an "off" position thereof, the control structure having the amount of the energy passing therethrough from the source to the unit being different for each set position thereof, indicating structure operatively associated with the shaft for visually indicating the set position of the shaft and, thus, the amount of energy being fed by the control structure to the unit, and sensing structure operatively associated with the shaft that senses the set position of the shaft and electronically displays that sensed position of the shaft whereby th
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: March 2, 1993
    Assignee: Robertshaw Controls Company
    Inventor: David M. Dodson
  • Patent number: 5129034
    Abstract: An on-demand electric water heater includes at least one heating chamber having an electric heating element operatively positioned between a cold water inlet and a hot water outlet. The heating elements are controlled by pressure sensing switches activated by water flow initiation or termination. A pressure relief valve is provided as a safety feature in the event the pressure sensing switches fail.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: July 7, 1992
    Inventor: Leonard Sydenstricker
  • Patent number: 5097114
    Abstract: A low-voltage electric heating device for application in a carburizing furnace is provided with an outer housing or sleeve for replaceable disposition within the furance, the outer housing radiating heat directly into said furnace; at least one current path conductor is positioned within the outer housing, the current path conductor being electrically connectable to a source of power and electrically insulated from a substantialy part of the outer housing. The heat radiated from the heating device is concentrated in the lower part because a current path has in series at least the current path conductor and at least a corresponding part of the outer housing, the resistance of the lower part of the outer housing being relatively large with respect to the remainder of the current path.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: March 17, 1992
    Assignee: General Signal Corporation
    Inventors: Stephen C. Mann, David L. Doubet, Gary D. Etter
  • Patent number: 5086213
    Abstract: The invention concerns a device for detecting variations in the physical state of the plastic material in a coupling piece used for welding pipes and incorporating a heating resistor, cavities which the softened material can enter and sensors for detecting the state of the material within the cavities. According to the invention, in order to obtain a weld of high quality, it is necessary for the distance between the bottom of the cavities and the part of the resistor nearest this bottom on the one hand, and for the linear dimension in the cross-section of these same cavities near their bottom on the other, to be less than or equal to the thickness of the material which is softened during the heating of the pieces. The invention applies to the control of the welding of sections of piping, particularly for the gas industry.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: February 4, 1992
    Assignee: Gaz de France
    Inventors: Max Nussbaum, Eric Federspiel
  • Patent number: 5083011
    Abstract: An air heater with a safety control circuit is disclosed. A heat source is mounted within a hollow housing having an air inlet end and an air outlet end. The heat source is actuated in response to the presence of a heat control signal. The heat control signal is produced when both a predetermined minimum pressure differential between static air pressure outside the hollow housing and the air velocity pressure within the housing is reached and the temperature of a portion of the housing is lower than a predetermined maximum sensed temperature. Application of the heat control signal to the heat source can be manually initiated or interrupted.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: January 21, 1992
    Assignee: Coppus Engineering Corporation
    Inventor: Richard W. Munroe
  • Patent number: 4954693
    Abstract: A ventilation regulated hot air supplied constant temperature oven used for heat aging testing. Heated air of a predetermined temperature is supplied to a test oven body through an air supply port. Ventilation of the test oven is carried out through the air discharge port at a predetermined rate at predetermined time intervals.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: September 4, 1990
    Assignees: Suga Test Instruments Co., Ltd., The Yokohama Rubber Co., Ltd.
    Inventors: Kenhachi Mitsuhashi, Shigeru Suga
  • Patent number: 4873553
    Abstract: A variable pressure control of fixing device, which includes a fixing roller and a compression roller in contact with each other and serves to fix a toner image on a transfer sheet by passing this sheet between these rollers, comprises a coil spring having one end connected to the fixing roller so as to compress it against the comprssion roller, a rod connected to the other end of the coil spring, and solenoids for moving the rod.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: October 10, 1989
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masakatsu Inaba
  • Patent number: 4828166
    Abstract: A device for regulating the heating element of a cooking vessel of the type with an input device for setting a preselected cooking temperature in the range of the boiling point of water, a device for measuring the temperature on or in the cooking vessel, and a control circuit for maintaining cooking temperature constant at the preselected level. The device includes apparatus for altering the cooking temperature as a function of the measured atmospheric pressure or the altitude above sea level at the site of use of the cooking vessel, such adjustment being in accordance with the dependence of the boiling point of water on atmospheric pressure or altitude above sea level.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: May 9, 1989
    Assignee: Fissler BmbH
    Inventors: Kurt Wolf, Wolfram Andre
  • Patent number: 4825047
    Abstract: A controller for an electric resistance waterbed mattress heater supplied with electric current by an elongate power cord extending between the heater and a power service outlet. The controller includes a small diameter elongate cylindrical housing in which an adjustable on and off switch is mounted and into which the cord is extended and connected with the switch. The switch includes a Bourdon tube to actuate the switch between opened and closed positions when the tube is caused to deflect by changes of pressure therein. A capillary tube is connected with and extends from the Bourdon tube to the exterior of the housing and about which it is formed and supported. An adjusting knob is positioned at one end of the body and is coupled with a part of the switch to move switch parts relative to each other and to the Bourdon tube to adjust and set the operating position of parts of the switch.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: April 25, 1989
    Assignee: Thermafoil Products Inc.
    Inventor: Floyd D. Miles
  • Patent number: 4814583
    Abstract: A temperature controller for controlling an electrical heater of a bed maintains the bed at a predetermined set temperature and additionally, over a long period of time, acts to vary the set temperature to compensate for variations in the temperature of the ambient environment in which the bed is situated. First and second temperature sensors respectively sense the temperature of the bed and the temperature of the environment ambient to the bed and the heater is switched to regulate the heating of the bed thereby.
    Type: Grant
    Filed: May 1, 1987
    Date of Patent: March 21, 1989
    Assignee: Safeway (Australasia) Limited
    Inventor: Jon Rainey