Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

1128 results about "Tube drain" patented technology

Flexible visually directed medical intubation instrument and method

A flexible medical intubation instrument provided for placement into an animal or human patient comprises a catheter with at least a pair of longitudinally extending lumens or channels including a sensor and/or actuator channel and a working channel. In the sensor/actuator channel is provided a fixed or slideably removable sensor cable having a sensor for sensing a characteristic or condition including any of the following: a visual sensor for optical viewing, a chemical sensor, a pH sensor, a pressure sensor, an infection sensor, an audio sensor, or a temperature sensor. The sensors are coupled by the sensor/actuator cable through light transmission, electric current, or radio transmission to a viewing instrument or other output device such as a meter or video screen for displaying the condition that is sensed within the body of the patient while the flexibility of the composite structure comprising the catheter and cable enable the entire instrument to flex laterally as it moves through curved passages or around obstructions during insertion or removal. While making observations through the sensor channel, the working channel simultaneously functions as a drain or an irrigation duct, a feeding tube, or to provide a passage for the insertion of one or a succession of surgical devices such that the catheter serves as a protective artificial tract or liner as surgical devices are inserted and removed through it in succession so as to minimize tissue trauma, infection, and pain experienced by the patient. The instrument can be used in urology, as well as a visually directed nasogastric tube, as a visually directed external gastrostomy tube, or as a visually directed internal gastric tube or percutaneous endoscopic gastrostomy tube and in other applications.
Owner:PERCUVISION

Direct-current power supply hot plug slow starting control circuit and control method

ActiveCN102570785APrevent breakdownSolve the phenomenon of output power failure and restartPower conversion systemsElectrical resistance and conductanceSlow-start
The invention provides a direct-current power supply hot plug slow starting control circuit, which comprises a discrete component slow starting circuit, power resistance circuits and a metal oxide semiconductor (MOS) tube drain-source electrode detecting circuit. The power resistance circuits are connected in parallel between MOS tube drain-source electrodes and a drain electrode of the discrete component slow starting circuit. The MOS tube drain-source electrode detecting circuit is connected with the power resistance circuits and the discrete component slow starting circuit and used for detecting voltage values of the power resistance circuits. When the voltage values are in a range of set values, MOS tubes of the power resistance circuits are connected. When the voltage values are beyond the range of set values, the MOS tubes of the power resistance circuits are disconnected. The invention further provides a control method for direct-current power supply hot plug slow starting. The direct-current power supply hot plug slow starting control circuit and the control method can effectively avoid MOS breakdown due to avalanche, simultaneously can effectively reduce voltage stress of the MOS tube drain-source electrodes and facilitates economic selection.
Owner:ZTE CORP

Construction method for mounting outdoor embedded high-density polyethylene double-wall corrugated drain pipe

The invention relates to a construction method for mounting an outdoor embedded high-density polyethylene double-wall corrugated drain pipe (CPP).The method is characterized by comprising the following processes of foundation trench digging, pipe mounting and backfilling, wherein the foundation trench digging technical process comprises measuring and setting out, mechanical grooving, levelling and tamping of a groove bottom, grit gravel cushioning and foundation sanding; the pipe mounting technical process comprises pipe mounting, well chamber building and rendering; and the backfilling technical process comprises soil filling for a chest, a water tight test, soil backfilling and tamping. The method solves the problems of discharge of rainwater and sewage of current municipal engineering, industrial wastewater discharge, subdistrict drain engineering, low speed for cement and metal pipe construction in the engineering of pipelines preburying and the like, heavy pipe weight, inconvenience for conveying and carrying, large labor intensity, high mounting cost and the like, and is applicable to the discharge of the rainwater and the sewage of the current municipal engineering, the industrial wastewater discharge, the subdistrict drain engineering, and the construction for mounting engineering drain pipes such as the pipelines preburying and the like.
Owner:QINGDAO HENGSHENGYUAN GROUP CONSTR

Light-emitting diode (LED) switch constant-current driving circuit

InactiveCN103648219AHigh stability of constant current controlLow costElectric light circuit arrangementCapacitanceControl signal
The invention provides a light-emitting diode (LED) switch constant-current driving circuit. The LED switch constant-current driving circuit comprises a voltage input module, an energy storage inductor, a freewheel diode, an LED module serving a load, a power tube for draining current and constant current, a detection module for detecting an input voltage phase state, a dimming control module connected to the detection module, an error amplifier connected to the dimming control module, a valley bottom detection circuit for detecting power tube drain voltage, a pulse width modulation circuit connected to the error amplifier and the valley bottom detection circuit, a control circuit for controlling the power tube according to detection voltage and PWM signals and a driving circuit of the power tube, wherein according to the dimming control module, input reference voltage Vref2 of the error amplifier and dimming control signals Vdimo are generated jointly through the detection voltage and reference voltage Vref1; the error amplifier enables the Vref2 to be compared with sampling voltage; and the pulse width modulation circuit is used for generating the PWM signals. According to the LED switch constant-current driving circuit, an electrolytic capacitor is not needed, an electronic transformer and a silicon controlled dimmer are compatible, the unique power tube in multiplexing simultaneously gives consideration to the draining current and the constant current, and the cost is effectively reduced.
Owner:SHANGHAI LATRONIX TECH CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products