4916 results about "Butterfly valve" patented technology

A vacuum chamber is evacuated through a first evacuation passage provided with a first valve and a second evacuation passage provided with a second valve. An opening degree of the first valve is adjusted so that a pressure in the vacuum chamber becomes substantially equal to a process pressure P; an opening degree of a butterfly valve further provided in the second evacuation passage is adjusted to substantially equal to a set value determined by a table in order to set flow rates of gases to be evacuated through the first evacuation passage and the second evacuation passage to be substantially equal to corresponding set values determined by the recipe; and an opening degree of the second valve is adjusted so that a measurement value of a differential pressure gauge further provided in the second evacuation passage becomes substantially equal to a differential pressure written in the table.

A drug dispensing device is comprised of an upper hopper having an upper opening for receiving a medicament and a lower opening. A lid covers the upper opening. A lower hopper having an upper opening and a lower opening in a bottom portion thereof is provided. The upper hopper defines a bulk storage chamber and the lower hopper defines a dispensing chamber. A rotatable dispensing disc is positioned in a lower portion of the dispensing chamber for dispensing medicament from the drug dispensing device through the lower opening in the lower hopper. A regulator is situated between the bulk storage chamber and the dispensing chamber for controlling the rate at which medicament moves from the storage chamber to the dispensing chamber. The regulator may take a variety of forms. In one embodiment, the regulator includes a valve for controlling the flow of medicament from the storage chamber to the dispensing chamber. The valve may include a member responsive to the volume of medicament in the dispensing chamber for controlling the position of the valve. The valve and member may include a trap door valve and a float, a butterfly valve and a rotatable arm, a guillotine valve and a movable arm, and a conical plunger and a wing extending from the base of the plunger. In another embodiment, the regulator may include a rotatable member having an opening therein. The rotatable member may include a cylindrical wall having an opening in a portion thereof, a plate having an opening therein, a cup shaped member defining an opening and a pair of rotatable members which together define at least one opening therein. The regulator may be configured such that the rate at which medicament moves from the storage chamber to the dispensing chamber is never zero. Further, agitating members may be provided which extend toward the upper hopper. Methods of operation are also disclosed.

A coupling arrangement coupling and thermally isolating a continuously variable electrical actuator rotationally coupled to and from a butterfly valve is provided. The valve may be used to modulate high temperature exhaust gas flow through an engine turbocharger. The actuator provides a continuously variable control of the valve. The coupling arrangement provides a thermal block to reduce heat transfer and vibration insulation between the actuator and the valve. The coupling arrangement generally includes a coupling shaft rotationally coupled at opposite ends to the input and output shafts by torsion spring mechanisms. The torsion spring mechanisms include yokes rotationally locking the coupling shaft to the input and output shafts. The torsion spring mechanisms allow a limited range of axial and pivotal translation between the coupling shaft and the input and output shafts and are preloaded to prevent rotational hysteresis in the valve.

An MIE apparatus has a blower, a direction valve, an oscillator, and a mask hose connector. The blower is connected to the direction valve, which is connected to the oscillator, which is connected to the hose connector. During insufflation, a direction valve connects exhaust of a blower to an oscillator, causing positive pressure at the hose connector. During exsufflation, the direction valve connects the blower intake to the oscillator, causing negative pressure at the hose connector. The oscillator is a butterfly valve with a 360° rotating disc. During insufflation, the disc is fixed to steadily modulate the airflow. During exsufflation, the oscillator is inactive or in flutter mode. When inactive, the disc is fixed to allow maximum air flow. In flutter mode, the disc continuously rotates so that the air flow rapidly alternates between maximum and minimum.

The invention relates to an electric control hydraulic damping cylinder structure for an intelligent knee joint. The electric control hydraulic damping cylinder structure is characterized in that an upper piston is provided with a hollow piston rod and an upper piston block, the upper piston block is positioned at the lower end of the hollow piston rod, two hydraulic oil channels of upper and lower chambers are arranged on the upper piston block, and check valves with opposite flow shutting directions are respectively arranged in the two hydraulic oil channels of the upper and lower chambers; a lower piston is provided with a lower piston rod and a lower piston block, the lower piston block is positioned at the upper end of the lower piston rod, two fan-shaped holes which are used as hydraulic oil channels of upper and lower chambers are formed in the lower piston block, the upper piston block and the lower piston block are connected with each other in a cylinder block, and a butterfly valve plate is arranged between the upper piston block and the lower piston block, is connected with a stepper motor by a valve element stem in the hollow piston rod and can rotate under the control of the stepper motor, so that the flow passage areas of the hydraulic oil channels of the upper and lower chambers in the lower piston block can be changed, and the flow rates of the upper and lower chambers of a hydraulic cylinder can be changed. The electric control hydraulic damping cylinder structure has the advantage that bending and stretching damping of the prosthetic knee joint can be bidirectionally independently controlled by the single motor.

The invention relates to a system for testing heat-transfer performance of a gas-water-oil heat interchanger, and is composed of a steady air system, a cold water system, a hot water system and a oil system. The steady air system: a voltage-stabilizing case output end is connected with inlets between the first steady air flow gauge and the first steady air pneumatic butterfly valve or the second flow gauge and the second steady air pneumatic butterfly valve and high-pressure centrifugal fan, wherein, steady air bypass electric control valve is connected between the inlet and the outlet of the high-pressure centrifugal fan; the hot water system: an expansion water tank, an electric heater water tank and an outlet are connected to the water pump, and water enters into the heat interchanger to be measured through the bypass of the electric three-way valve, the water flow gauge and the electromagnetic valve, thereby forming a closed loop system; the cold water system: compared with the hot water system, the system does not have an expansion water tank; the oil loop system is a open and close type circulating system: the outlets of the expansion fuel tank and the fuel-tank are connected to the oil pump, oil enters into the heat interchanger to be measured through the bypass of the electric three-way valve, the oil flow gauge and the electromagnetic valve, thereby forming a closed circulation for testing the heat exchange performance of the oil-water, oil-gas heat interchanger.

A muffler to be coupled to the engine of a motor vehicle (e.g., a car, truck, motor cycle, boat, and the like) so that exhaust gases emitted by the engine can be exhausted to the atmosphere. The muffler includes an outer cylindrical body and an inner cylindrical liner having a plurality of apertures formed therethrough. Sound absorbing packing material is located in an annular space between the outer body and the inner liner. An adjustable butterfly valve is located within the inner liner and rotatable between open and closed positions to control the gas flow through the liner, the sound generated by the muffler as a result thereof, and the performance of the engine to which the muffler is coupled. The rotation of the butterfly valve is controlled by an external DC motor or a continuous cable. The shaft of the motor or the cable is connected through the outer body and inner liner of the muffler to the butterfly valve. By closing a manually accessible motor control switch electrically connected to the motor or by pulling on the cable, the operator of the motor vehicle has the ability to control the rotation of the butterfly valve connected to the motor shaft or the cable while the vehicle is in motion.

The invention discloses a system and method for power generating by jointly recovering the waste heat of a flue gas of a sintering machine and an exhaust gas of a cooling machine, belonging to the technical field of power generation by using waste sintering heat of a steel and iron plant. The power generating system comprises a sintering machine flue gas waste heat utilizing system, a cooling machine exhaust gas waste heat utilizing system, a turbine generating system and a relevant auxiliary system, wherein a main waste heat discharging boiler is utilized to recover the waste heat of the flue gas of a high-temperature segment of the tail part of the sintering machine; a cooling machine waste heat boiler is utilized to recover the waste heat of the high-temperature exhaust gas of the cooling machine; and a high-temperature electric butterfly valve is arranged between the high-temperature segment and a low-temperature segment of a large flue positioned on the tail part of the sintering machine to prevent the wind pickup temperature of the flue gas from being reduced because a low-temperature flue gas and a high-temperature flue gas are directly mixed so as to ensure the high-temperature flue gas to enter the main waste heat discharging boiler for waste heat recovery. The system and method effectively utilizes the waste heat resources of the high-temperature flue gas of the machine tail of the sintering machine and a hot gas of the high-temperature segment of the cooling machine, enhances the waste heat recovery and utilization efficiency of a sintering process and increases the power generation capacity of the waste heat power generating system.

Emission gas recycling equipment includes a passage for recycling a part of an emission gas and a control valve for controlling an amount of the part of the emission gas. The control valve includes: a housing having a pipe portion; a butterfly valve accommodated in the pipe portion rotatable in a first direction and a second direction; a seal ring for sealing a clearance; and valve open/close operation means for stopping the butterfly valve at the valve full close position after the valve open/close operation means operates the butterfly valve to open and to close equal to or more than one cycle across the valve full close position at the time when the engine stops or after the engine stops.

A positive pressure airway device for providing resistance in an air pathway for a patient exhaling. The device includes a central tube region, a inspiratory air passageway for passing air into the central tube region when a patient breathing through the device inhales, and an expiratory air passageway for passing air out of the central tube region when a patient breathing through the device exhales, A valve in the expiratory air passageway allows air to flow out only when a patient using the device exhales with an expiratory air pressure greater than a selected pressure. The valve includes a stopper and a stopper-biasing spring. The passageways and/or stopper and/or spring are adapted to provide unbalanced forces against the stopper, thus causing the stopper to flutter and providing an oscillating pressure drop as the patient exhales.

A two-cycle engine having forward scavenging is provided. Mixture drawn into the crankcase via a butterfly valve carburetor is conveyed into a combustion chamber via transfer channels in the cylinder. An air duct is connected via a controllable connection with a transfer channel to supply essentially fuel-free air thereto during a load state of the engine. To convey a fuel quantity adapted to drawn-in air during idling and partial load, yet during full throttle to achieve separated supply of air and mixture, a dividing wall extends in the direction of flow of air in the carburetor intake duct. In the pivot region of the butterfly valve, a connecting aperture in the dividing wall is closed in full throttle by a completely open butterfly valve. During idling and partial load the connecting aperture is open so that a uniform pressure can form in the intake duct in conformity with drawn-in air.

An intake device having an intake channel that includes an intake channel section is provided. A butterfly valve is pivotably mounted in the intake channel section. A dividing wall is disposed downstream of the butterfly valve and divides the intake channel section into an air duct and a mixture duct. The air duct has a flow cross-section that is greater than the flow cross-section of the mixture duct. A fuel jet opens into the mixture duct.

A partition wall partitioning a cooler inlet port and a cooler outlet port extends from a cooler connecting surface of a connecting portion to a vicinity of a shaft supporting a four-way butterfly valve. An EGR gas leakage around a first valve plate can be restricted. Thus, an increase in temperature of EGR gas flowing through an EGR gas outlet port can be restricted at a cooled mode. A deterioration of emission reducing performance can be avoided.

Butterfly valves assemblies are provided that include a flowbody, a butterfly plate, an actuator and an upper chimney and a lower chimney disposed within the flowbody. The flowbody has an inner surface defining a channel. The butterfly plate is disposed in the channel, is rotationally mounted to the flowbody, and has an outer periphery. The actuator has an actuator output shaft that is coupled to the valve shaft via a serrated spline coupling. The upper chimney and the lower chimney are configured to include bearing assemblies that constrain radial loads and thrust loads exerted upon the valve shaft and minimize misalignment of the serrated spline coupling.

A method of reducing gaseous phase presence in the liquid fuel metering chamber of a diaphragm by providing a "High-Point Pick Up" hole positioned in the optimal metering chamber location (highest) to assure maximum purge evacuation of air and/or other gases prior to engine start-up and during running. This optimal location is dependent upon first determining, in advance of carburetor fuel feed circuitry and/or air purge system design, the orientation of the carburetor as mounted on the engine in its primary operator usage position, or so-called "standard operating position" (SOP). This SOP in turn is determined in the first instance by the engine manufacturer and/or the manufacturer of the portable engine-driven handheld appliance on which the engine is mounted. In one embodiment the two typical fluid circuits (air purge and normal idle/high speed fuel feed circuits) share a common, sole take-off inlet opening into the metering chamber, the same being located at the highest elevation point in the metering chamber in the given SOP orientation. This assures that the maximum amount of air and/or fuel vapor is removed from the metering chamber during purging prior to start-up and during running. In accordance with the invention, the primary usage position (SOP orientation) of the engine is determined and becomes a known use parameter prior to the carburetor manufacturer determining such take-off hole location. Both butterfly valve cubic carburetor and rotary valve carburetor embodiments are disclosed embodying the invention.