40results about How to "Increase cracking pressure" patented technology

A device (10) for treatment of obesity of a patient comprises an annular element (12) having a relatively large outer boundary and a relatively small inner boundary, and an elongated flexible tube (14) extending from the relatively small inner boundary of the annular element to a distal end. The relatively large outer boundary is adapted to be attached to an inner wall of a stomach (100) of a patient, such that the annular element divides the stomach (100) into two chambers, an esophagus-end chamber close to an esophagus of the patient, and a pylorus-end chamber close to a pylorus of the patient. The invention also provides a method for treatment of obesity of a patient which includes inserting an annular element having a relatively large outer boundary and a relatively small inner boundary into a stomach of the patient, and attaching the relatively large outer boundary of the annular element to an inner circumference of the stomach of the patient.

A method for preventing shield jamming by excessive frictional resistance in earth pressure balance shield which involves real-time monitoring of earth pressure signal for earth pressure on the shield body through sensors on the shield machine. Combined with the known parameters, resistance in the shield machine is calculated. The friction F₁ between the shield body and the stratum is calculated by CPU module in PLC according to the earth pressure signals on a real-time basis. Then the friction F₁ is determined whether it is less than or equal to the difference between the quotient of dividing total propulsion force F_t by correction coefficient Kxz and total resistance of F₂, F₃, F₄ and F₅; if so, it is under normal propulsion; if not, the warning device alarms. Therefore forced shut down due to shield jamming is effectively avoided, the construction risk is reduced and the construction efficiency is improved.

A disposable pump for a liquid dispensing system including a compressible container, includes—a housing forming a chamber and a dispensing opening wherein the pressure in the chamber may be varied for pumping liquid from the container to the chamber, and from the chamber to the dispensing opening, and a regulator fixedly arranged in the chamber for regulating a flow of liquid between the container and the chamber and between the chamber and the dispensing opening, the regulator including an outer valve for regulating the flow between the chamber and the dispensing opening. The pump may assume a closed position, in which a volume of liquid is drawn from the container to the chamber by a negative pressure created in the chamber, and a dispensing position, in which a volume of liquid is drawn from the chamber to the dispensing opening. The outer valve is displaceable between a symmetrical position corresponding to the closed position, where the outer valve is in sealing contact with the housing, and a tilted position corresponding to the dispensing position, where the outer valve is movable to and from sealing contact with the housing dependent on the pressure in the chamber, and the displacement of the outer valve from the symmetrical position to the tilted position requiring external force being applied to the pump and transferred to the regulator independent of the pressure variations in the chamber.

A disposable pump for a liquid dispensing system having a compressible container, includes a chamber in which the pressure may be varied for pumping liquid from the container to the chamber, and further from the chamber to a dispensing opening, the chamber enclosing an inner valve for regulating a flow of liquid between the container and the chamber, and an outer valve for regulating a flow of liquid between the chamber and the dispensing opening. The pump may assume a closed position, in which a volume of liquid is drawn from the container to the chamber by a negative pressure created in the chamber, and a dispensing position, in which a volume of liquid is drawn from the chamber to the dispensing opening. The inner valve is a one-way valve, which opens for a flow of liquid in the dispensing direction at an inner valve opening pressure acting in the dispensing direction, and closes for any pressure acting in an opposite direction. The outer valve is a two-way valve, which opens for a flow of liquid in the dispensing or opposite direction.

A fuel vapor treating apparatus includes a fuel tank having an inlet pipe and being configured to preserve liquid fuel therein, an adsorbent canister filled with an adsorbent capable of adsorbing fuel vapor, a fuel vapor path connecting the fuel tank to the adsorbent canister, a diaphragm valve having a back pressure chamber and being configured to open and close the fuel vapor path, a circulation path connecting the fuel tank to the inlet pipe for circulating fuel vapor from the fuel tank to the inlet pipe during refueling and being configured to be blocked when, the fuel tank is filled up, and a negative pressure generator connected to the circulation path and the back pressure chamber and configured to generate negative pressure by using a stream of the fuel vapor in the circulation path in order to cause the negative pressure to act on the back pressure chamber of the diaphragm valve.

The invention provides a quaternary system rotation rope coring device for balancing wave heave, which relates to the technical field of drilling. The quaternary system rotation rope coring device includes an outer pipe assembly, an inner pipe assembly arranged in the outer pipe assembly and a seat ring arranged on the inner wall of the outer pipe assembly. The inner pipe assembly includes a hanging mechanism, a wave heave balancing mechanism, an adjustment single action mechanism and a rock core pipe, which are successively connected from top to bottom; the wave heave balancing mechanism includes an alarm plug short connection piece, a hydraulic cylinder and a stopper, a piston assembly, a hollow piston rod and a water division joint, wherein the alarm plug short connection piece, the hydraulic cylinder and the stopper are successively connected from top to bottom, and the piston assembly, the hollow piston rod and the water division joint are successively connected from top to bottom; when the piston assembly reaches an upper extreme position, the water division joint contacts the stopper, and a plug body stretches into a slide valve water inlet channel; and when the piston assembly reaches a lower extreme position, the piston assembly contacts the stopper. The quaternary system rotation rope coring device can be applied to a drilling coring process, when the outer pipe assembly heaves with a ship, a tool bit tightly compresses a hole bottom all the time, and the situation that the rock core pipe heaves with the outer pipe assembly can be effectively avoided.

The invention discloses a relay valve and an electronic paring brake system based on the same. The relay valve comprises a shell, a control piston, a valve body, a valve return spring and a plate valve. A control port is arranged at the upper portion of the shell. An exhaust port is formed in the lower portion of the shell. An air inlet is formed in one side of the shell, an air outlet is formed in the other side of the shell, the shell comprises a control air source acting air cavity and a brake working air cavity, the control air source acting air cavity is communicated with the control port, the upper end of the valve body controls connection and disconnection of the air outlet and the exhaust port, the lower end of the valve controls connection and disconnection of the air inlet and the air outlet, the lower part of the piston is controlled to tightly abut against a piston return spring, and the lower portion of the valve abuts against the valve return spring; when the piston is controlled to be at the uppermost end, the air outlet and the exhaust port are communicated; when the piston return spring is pressed and moved downwards, the air outlet and the air inlet are communicated. The relay valve is simple in structure, reliable in working and low in cost, and the electronic parking brake system is safe and reliable.

The invention provides an electromagnetic coil structure for an electromagnetic valve. The electromagnetic coil structure comprises a coil winding and an integrated coil framework, wherein a winding part is arranged on the coil framework, an insulating layer is sprayed on an inner wall of the winding part, the coil winding is wound on the winding part, the insulating layer is used for keeping the coil winding and the coil framework insulated; a magnetic conductive shell is installed on the outer side of the coil winding, a leading-out wire is arranged on the outer side of the magnetic conductive shell, and the leading-out wire penetrates through the magnetic conductive shell to be electrically connected with the coil winding. According to the electromagnetic coil structure for the electromagnetic valve, defects that an existing electromagnetic coil is complex in structure, large in size, unstable in magnetic field force and weak in electromagnetic force are overcome.

The present invention relates to a hydraulic type brake system which includes a unit for adjusting a back pressure in a turn driving hydraulic circuit mounted in a construction heavy equipment such as an excavator, etc., and in particular to a hydraulic type brake apparatus which is used together with a relief valve installed various actuator driving hydraulic circuits for adjusting a back pressure in a lower flow side of a relief valve for thereby adjusting an opening pressure of a relief valve. There is provided a back pressure adjusting unit adapted to adjust an opening pressure of the relief valve by adjusting a back pressure of the hydraulic circuit in a lower flow portion of the relief valve based on a co-operation with the actuator.

The invention relates to an electromagnetic valve, in particular an oil stopping electromagnetic valve, and belongs to the technical field of electromagnetic valves. The electromagnetic valve comprises a block, a shell, a sealing seat, an armature, a coil component, a sheath, a cover plate, a spring and an iron core, wherein oil holes in the sealing seat are connected with an oil inlet channel and an oil outlet channel respectively, the lower end of the armature is connected with a gland, and the lower end of the gland is in contact with the oil holes of the sealing seat; the inner back part of the armature is provided with the spring, the upper end of the spring is provided with the iron core, and the upper and lower ends of the spring are in compressed contact with the iron core and the armature. The electromagnetic valve has a simple, compact and reasonable structure, can effectively control the switch of an oil circuit, and has a good sealing performance and a small current; the iron core is matched with the armature through conical surfaces, which increases the opening pressure and can reduce the required drive current.

A fuel injection valve with a valve member (10), which cooperates with a valve seat (16) to control injection openings (20). The valve member (10) is guided, in a portion remote from the combustion chamber, in a bore (7) and is surrounded by a pressure chamber (12), which can be filled with fuel at high pressure. The valve member (10) is urged by a spring (27) disposed in a spring chamber (25) and having a closing force in the direction of the valve seat (16), and in an appropriate opening pressure in the pressure chamber (12), as a result of the hydraulic pressure on a pressure shoulder (11), embodied on the valve member (10), the valve member lifts from the valve seat (10) and thus opens the injection openings; the injection of the fuel is effected separately in a main injection and a subsequent postinjection. The pressure chamber (12) and the spring chamber (25) communicate via a throttle connection, so that the pressure in the otherwise closed-off spring chamber (25) rises during the main injection and via the additional hydraulic force on the valve member (10) raises the opening pressure of the postinjection; the pressure in the spring chamber (25) has reached the initial value again by the onset of the next injection cycle (FIG. 1).

The invention provides a split type oil spray nozzle of a diesel engine, and relates to the field of diesel engine components. The split type oil spray nozzle of the diesel engine comprises a valve body and a needle valve arranged in the valve body and is characterized in that the valve body comprises a transition body and an oil nozzle, the center at the right end of the transition body is provided with a clamping groove, and one end of the oil nozzle is arranged in the clamping groove in the right end of the transition body in a clamped mode. The split type oil spray nozzle of the diesel engine is convenient to maintain, work inertia of the oil spray nozzle is reduced, motion impact force is reduced, the spray opening pressure is increased, diesel fuel atomization is made to be fine and even, burning is conducted evenly in an air cylinder, emission is lowered, the fuel efficiency is improved, and the use efficiency of a product is improved.