207results about How to "Close fast" patented technology

A fluid transportation device includes a valve seat, a valve cap, a valve membrane, multiple buffer chambers, a vibration film and an actuator. The valve membrane is arranged between the valve seat and the valve cap, and includes several hollow-types valve switches, which includes at least a first valve switch and a second valve switch. The multiple buffer chambers include a first buffer chamber between the valve membrane and the valve cap and a second buffer chamber between the valve membrane and the valve seat. The vibration film is separated from the valve cap when the fluid transportation device is in a non-actuation status, thereby defining a pressure cavity. The actuator is connected to the vibration film. When the actuator is driven to be subject to deformation, the vibration film connected to the actuator is transmitted to render a volume change of the pressure cavity and result in a pressure difference for moving the fluid.

A collapsible support is provided for a flexible RV sewer hose which includes in the preferred form, a plurality of pairs of identical arches. The height of each arch pair is different from the preceding arch pair to allow a sewer hose placed therein to properly flow by gravitational forces from the RV to a septic system. The arches of the support are hinged along the side so that each arch will cradle the sewage hose at an angle to the longitudinal axis of the sewer hose.

A vehicle having two primary wheels and two or more retractable wheels that may be operated in either two-wheeled or multi-wheeled configuration with a sliding panel system for open or complete enclosure, with both the wheelprint and the open / enclosed panel system being quickly and independently operated.

Devices and methods are presented to provide a seating area on a common crutch. The convertible seat is low profile and maintained flat on a side of the crutch until needed. It may be opened easily and placed flat on the floor to provide the user with a convenient sitting or table area.

The invention provides an H-bridge driving circuit. The circuit is characterized by comprising the following steps that: a photoelectric isolating circuit converts a received first pulse width modulation (PWM) signal into a second PWM signal and transmits the second PWM signal to a dead zone control logic module; the dead zone control logic module sets dead zone information according to the second PWM signal, and generates an upper bridge arm control signal and a lower bridge arm control signal according to the dead zone information and the second PWM signal, and the dead zone control logic module transmits the upper bridge arm control signal to an upper bridge arm front driving circuit and transmits the lower bridge arm control signal to a lower bridge arm front driving circuit; and the upper bridge arm front driving circuit and the lower bridge arm front driving circuit control the operation state alternation of a load driving circuit according to the upper bridge arm control signal and the lower bridge arm control signal respectively. The circuit can avoid the capacity effect in the voltage change process of an H-bridge circuit load unit and the output frequency of the H-bridge driving circuit can be increased.

The invention discloses a cam oil-supply type electro-hydraulic valve driving system and belongs to a variable-valve cam oil-supply type electro-hydraulic valve driving system of an engine. The cam oil-supply type electro-hydraulic valve driving system mainly comprises an oil supplier, a valve driving mechanism, an oil tank, a connection oil line and an electromagnetic valve. An opposed cam-plunger oil supplier is designed according to the number of cylinders of the engine and the ignition order, and hydraulic oil can be provided for all intake / exhaust valve driving mechanisms of the engine by using only two oil suppliers. A variable intake / exhaust valve can be realized and energy required by valve drive can be reduced by controlling a first electromagnetic valve between an oil supply oil cavity and a driving oil cavity. The secondary opening of the exhaust valve is realized by controlling a fifth electromagnetic valve. Energy consumption for charging the oil supply oil cavity can be reduced by matching a second electromagnetic valve between the oil supply cavity and the oil tank with a fourth electromagnetic valve between a forward oil supply oil cavity and a reverse oil supply oil cavity. When a third electromagnetic valve is used, a valve seat buffer and a valve gap regulator are saved, the valve closing speed is increased and the valve closing range is broadened.

The invention relates to the field of liquid-based cytology immunocytochemistry, in particular to an immunohistochemical kit for auxiliary diagnosis of cervical cancer. Ready-to-use antibody working liquid is provided and prepared from an antibody reagent, bovine serum albumin, non-reductive sugar, betaine, cyclodextrin, a neutral inorganic salt, a surfactant and a preservative, wherein the antibody reagent is a reagent A or a reagent B; the reagent A is a phosphate buffer solution (PBS) of a p16<INK4a> monoclonal antibody and a Ki-67 monoclonal antibody; the reagent B is a PBS of horse radishperoxidase conjugated GaMIgG and an alkaline phosphatase conjugated goat anti-rabbit secondary antibody; and the pH value of the PBSs is 7.2-7.8.

A quick adjustable clamp includes a first clamp jaw, a second clamp jaw, a driving screw and a nut. The second clamp jaw is extended with a receiving section. The receiving section is formed with a notch facing the first clamp jaw. The driving screw has one end pivotally connected to the first clamp jaw. The nut is mounted around the driving screw and configured to be movably received in the notch. For quick adjusting a span of the clamp, the nut can be removed from the notch, quick moved along the driving screw, and then reengaged by the notch.

The invention relates to a reciprocating engine and a working fluid inlet system therefore. The engine includes at least one cylinder with a reciprocating piston therein and a variable volume expansion chamber capable of receiving a working fluid via an inlet valve. The inlet system includes a pilot valve having an open condition and a closed condition. In the open condition, the secondary fluid passes therethrough to act on the inlet valve. The system also includes an actuating means for controlling the condition of the pilot valve. The inlet valve is adapted to open in response to the action of the secondary fluid. The engine may also include exhaust means, possibly by porting in the piston and a cylinder wall. The working fluid may be used as the secondary fluid.

A fuel injection system having an injection valve, a line supplying fuel at high pressure to the injection valve a control valve controlling the pressure in a control chamber communicating with the line. The control valve has a movable valve part is actuatable by an actuator via a hydraulic coupler having two pistons cooperating with a booster chamber of the coupler. A seat of the movable valve part has an inside cross-sectional area f3, with means for filling the booster chamber via guide gaps of the pistons with fuel under pressure. The pistons are located parallel to and inside one another and a booster chamber is located on the ends of the pistons toward the actuator. In the interior of the outer piston defines a filling chamber which communicates with the line and one of the pistons has a cross-sectional area f4 is mechanically coupled to the actuator via a rod having a cross-sectional area f5. The other piston which has a piston area f2, actuates the control valve via a rod having a cross-sectional area that is smaller than f2 and the direction of the closing motion of the movable valve part matches the direction of fuel flowing out of the control chamber so that the control valve is at least partially force-balanced because of the pressure acting on the further piston in the booster chamber.

The invention relates to a monostable axial-flow type solenoid valve based on uncoupled permanent magnet bias. The monostable axial-flow type solenoid valve comprises a permanent magnet assembly, a valve body assembly and an armature assembly, a coil, a valve seat and an outer magnetizer; the valve body assembly comprises an upper valve body, a magnetism isolating ring and a lower end cover; the armature assembly comprises an armature cover, an armature, a reed and a baffle plate; the coil forms an electromagnetic loop through the upper valve body, a main body part of the armature, the lower end cover, the magnetism isolating ring and the outer magnetizer; the permanent magnet and the armature cover form a permanent magnet loop through an air gap; the electromagnetic loop and the permanent magnet loop respectively form starting force on the armature assembly. A permanent magnet bias loop and a coil electromagnetic loop are independent from each other, so that influence of the permanent magnet on the coil electromagnetic loop is eliminated; the permanent magnet bias loop and the coil electromagnetic loop are linearly superposed, so that the monostable solenoid valve is simple in magnetic path design; and requirements on starting electromagnetic force are reduced by virtue of permanent magnet biasing force.