235 results about "Pressure buildup" patented technology

A device for draining bodily fluids is described herein which generally may comprise an elongate body defining one or more lumens configured to receive a bodily fluid from a cavity, e.g., bladder, of a patient body. The one or more lumens are in fluid communication with a reservoir which may receive the bodily fluid. A pumping mechanism may be used to urge the bodily fluid through the one or more lumens, where the pumping mechanism is configured to maintain an open space within the one or more lumens such that outflow of the bodily fluid through the one or more lumens remains unobstructed such that a negative pressure buildup in the cavity is inhibited. The device may also include a vent or valve mechanism in communication with the elongate body to allow air to enter or exit the one or more lumens.

A method and apparatus for depositing III-V material is provided. The apparatus includes a reactor partially enclosed by a selectively permeable membrane 12. A means is provided for generating source vapors, such as a vapor-phase halide of a group III element (IUPAC group 13) within the reactor volume 10, and an additional means is also provided for introducing a vapor-phase hydride of a group V element (IUPAC group 15) into the volume 10. The reaction of the group III halide and the group V hydride on a temperature-controlled substrate 18 within the reactor volume 10 produces crystalline III-V material and hydrogen gas. The hydrogen is preferentially removed from the reactor through the selectively permeable membrane 12, thus avoiding pressure buildup and reaction imbalance. Other gases within the reactor are unable to pass through the selectively permeable membrane.

A steamer attachment (10) allows a user to selectively dispense steam from a steamer (12). The attachment (10) broadly comprises a body (14), a first and second steam distributor (16,18) located in a head (20) of the body (14), and a valve (22) located in a handle (24) of the body (14). The first distributor (16) preferably comprises a nozzle (52) to concentrate the steam and a brush (54). The second distributor (18) preferably comprises a plurality of holes (56) to disperse the steam. The second distributor (18) may also include a detachable diffusor (58) to further disperse the steam. The valve (22) preferably opens a first path toward the first distributor (16) before closing a second path toward the second distributor (18). Thus, the steam always has at least one available path, in order to prevent pressure buildup within the steamer (12).

A rotary union assembly for an automatic tire inflation system for maintaining the pressure in the tires on a tractor trailer or other vehicle having a source of pressurized air for communication with the tires. The assembly communicates the tires with the air source through the axle interior using a conduit having a rigid portion and a flexible portion that extends between a support in the axle spindle and a rotary union housing secured against the outside end surface of the hub cap so as to be outside the wheel lubrication compartment and rotatable with the hub cap. The two-component conduit allows for a durable seal with the support in the axle spindle and accommodates misalignment of the rotary union housing with the conduit support. Relief valves in the housing prevent excessive pressure buildups in the housing and in the hub cap in the event of an air leak.

A combination grill, smoker and fireplace device having a tapered configuration, where heat, smoke and / or gas upwardly passes through a tapered interior chamber and exits through a vent system. The tapered chamber collectively includes a heat source, a grate, one or more racks and a rack support means; and is configured to effectively reflect the heat smoke and / or gas at an optimal angle inhibiting the occurrence of radial bounce, reducing thermal bottlenecking, alleviating pressure buildup and increasing thermal efficiency. In an embodiment, the device incorporates a storage compartment to house equipment, accessories and / or materials therein. Alternatively, the device includes screen doors positioned behind the second set of doors being attached to an enclosure. The enclosure may act as a fireplace, grill or smoker and the chamber acts as an elongated chimney. In a further embodiment, the base of the device is closely located to the ash pan and acts as a deck to prohibit heat from being transferred to a flooring or ground surface.

The present invention relates to easily replaceable rupture disk arrangements and, to arrangements including reversible calibrated rupture disk assemblies, bi-directional rupture disk assemblies and tandem pressure relief devices. The present invention further includes uses for such arrangements including apparatus and methods for preventing critical annular pressure buildup in an offshore well utilizing a modified casing portion that includes a burst disk assembly of the present invention and apparatus and methods for relieving an over-pressure in the outlet line of a positive displacement pump to prevent pump damage.

A flow sensor is incorporated into a junk basket to sense a flow stoppage due to a plugged screen or plugged cuttings ports in a mill. The sensor triggers a signal to the surface to warn personnel that a problem exists before the equipment is damaged. The sensor signal to the surface can take a variety of forms including mud pulses, a detectable pressure buildup at the surface, electromagnetic energy, electrical signal on hard wire or radio signals in a wifi system to name a few options. Surface personnel can interrupt the milling to take corrective action that generally involves pulling out of the hole or reverse circulating to try to clear the screen or mill cuttings inlets. Other variables can be measured such as the volume or weight or rate of change of either and a signal can be sent to the surface corresponding to one of those variables to allow them to be detected at the surface in real time.

A series of ball seat assemblies preferably used to open a series of sliding sleeves for formation access to a zone that is to be fractured allows sequential shifting of the sleeves with a single ball. The ball is guided by a tapered member with a lower outlet larger than the ball. The ball lands on the segments that are initially supported. Some leakage occurs between the segments but not enough to prevent pressure buildup to shift the sleeves. The tapered member closely fits to the segments to minimize leakage. Shifting the segments axially allows them to retract so the ball passes to eventually land on a non-leaking seat so that the zone can be fractured. The ball is recovered at the surface after passing the retracted segments and going through the undistorted opening in the tapered member.

A fuel pressure relief valve is provided to minimize evaporative emissions due to fuel leakage through the fuel injectors. The fuel pressure relief valve is sealed during operation to prevent flow through the valve. When the automotive vehicle is not operating and the temperature has cooled, the valve unseals. Thereafter, temperature rises that would otherwise result in pressure buildup are prevented.

A self-assembled nanobump array structure including a semi-absorbing outer layer provided on at least one nanobump-forming substrate layer, the semi-absorbing outer layer configured to ablate slowly to allow an applied laser energy to be transmitted to the at least one nanobump-forming substrate layer, in which the self-assembled nanobump array structure is formed by an energy and a pressure buildup occurring in the at least one nanobump-forming substrate layer.

The invention belongs to the technical field of electric motor breaking, and relates to an electronic hydraulic braking system based on a planetary gear train. The electronic hydraulic braking system adopts dual motors to input, and comprises a brake pedal feeling simulation mechanism, an active pressure buildup and regulating mechanism, a brake actuator and a brake control system so as to simulate brake pedal feeling, actively regulate hydraulic braking force and perform failure protection. One motor is located in the brake pedal feeling simulation mechanism, and used for simulating the brake pedal feeling; the other motor is located in the pressure buildup and regulating mechanism, and used for active buildup and regulation control of hydraulic pressure; the active pressure buildup and regulating mechanism is a two-degree-of-freedom differential gear train mechanism with a locking mechanism. The system takes the motors as hydraulic pressure sources, has a failure protection function and is higher in reliability and safety, and a brake pedal feeling simulator does not need to be designed independently; meanwhile, the system has the advantages of simple and compact structure, easiness in control, complete functions, stable performance, low cost and higher maintainability.

The invention relates to the field of shield construction, in particular to a high water pressure soft soil stratum HFE combined type shield starting method. The technical problem of receiving of starting of a soft soil stratum shield tunneling machine under a condition of high water pressure is solved. The shield starting method comprises the following steps that rotary jetting reinforcing is constructed according to design drawing requirements; freezing pipes and temperature measuring holes are constructed, temperature measuring lines are arranged, and freezing is conducted after freezing equipment and a freezing pipeline are mounted and debugged; shield starting preparation is conducted; the outer portion of a door opening steel ring is connected with an externally connected steel ringdevice through a bolt; after shield starting preparation work is completed and freezing and reinforcing are conducted, a door opening fencing structure is broken and removed; the shield tunneling machine jacks and marches forwards; pressure buildup is conducted on a working face of the shield tunneling machine; the freezing pipe in a tunneling outline is pulled and removed, and other freezing pipes continue to work and conduct freezing; an arc-shaped plate is welded to the outer vertical face of the externally connected steel ring device, after the shield tunneling machine completely enters the externally connected steel ring device, synchronous grouting is started, and starting tunneling is completed. The high water pressure soft soil stratum HFE combined type shield starting method has obvious advantages when being particularly applied to a soft soil stratum which is high in waterhead, large in water yield and not equipped with a starting rainfall condition, and has good popularization prospects.

A sealed electrical enclosure used in hazardous locations for enclosing circuit breakers having a bottom housing and a top housing with a labyrinth seal or joint formed therebetween, the bottom housing adapted to receive one or more circuit breakers, a first metal bus extending from a point internal to the bottom housing through a first end wall to a point external thereto, and a second metal bus extending from a point internal to the bottom housing through a second end wall to a point external to thereto, where the first and second metal buses are adapted to contact first and second electrical terminals of a circuit breaker when placed within the bottom housing, and a first vent positioned on the top housing for dissipating pressure buildup, wherein the top housing is removably secured to the bottom housing to allow for removal and replacement of a circuit breakers within the housing.

The invention discloses miniaturized multipurpose treatment equipment for separating and dewatering restaurant garbage, belonging to the field of dewatering. The miniaturized multipurpose treatment equipment comprises a motor, a coupling, an exhausting / cleaning port, a discharge port adjusting device, an isodiametric threaded section, a pressure buildup section, a reducing threaded section, a rotary connecting mechanism, a liquid part collection tank, a liquid part collection tank discharge port, a bag breaking hook, an isodiametric conveying threaded section, a screw rod core shaft, a dynamic seal, an extrusion dehydration upper machine barrel, a sewage outlet, a liquid part storage box upper opening, an extrusion dehydration lower machine barrel, a solid part storage box, a liquid part storage box, a hydraulic support adjusting mechanism, a filter plate, a liquid outlet, a connecting hose, a solid part cleaning port, an oil drainage port and an automatic control system. The liquid part collection tank is connected with the lower machine barrel, and the liquid part filtered by the filter plate is guided into the liquid part storage box through the liquid part collection tank discharge port and the connecting hose. The remaining solid part after material dehydration is discharged into the solid part storage box from a machine barrel auxiliary discharge port. The discharge port adjusting device controls the closure of a discharge port by adjusting the position of a rotatable baffle plate to improve the pressure buildup dehydration effect.

The invention discloses a hydraulic decoupling type electro-hydraulic braking system which comprises a pedal displacement sensor for collecting a stroke of a pedal assembly, wherein a first isolationvalve and a second isolation valve are respectively arranged on outlets of a first cavity and a second cavity of a master cylinder; the outlet of the first cavity of the master cylinder is connected with an inlet of a simulator control valve in parallel; a liquid storage tank is connected with the first cavity and the second cavity of the master cylinder, an active pressure buildup unit and a pedal feel simulator of the master cylinder are connected by a pipeline; a one-way valve is arranged on a parallel pipeline; a first hydraulic pressure sensor is arranged in the second cavity of the master cylinder; a second hydraulic pressure sensor is arranged at the outlet of the active pressure buildup unit; a self-check valve is arranged between the first cavity of the master cylinder and the outlet of the liquid storage tank; a first suction valve and a second suction valve are arranged at the outlet of the active pressure buildup unit in parallel; the pipeline where the first suction valveis located is connected between the first isolation valve and the ESC module; the pipeline where the second suction valve is located is connected between the second isolation valve and the ESC module;and an ECU controls the self-check valve, the first isolation valve, the second isolation valve, the first suction valve, the second suction valve, the simulator control valve and the active pressurebuildup unit.

Foldable boom inner wings are attached to a boom center frame through a rocker attached to a breakaway hydraulic cylinder pressurized to full stroke and connected to an accumulator. When a wing impacts an object, the impact load is transmitted through the fold cylinder and rocker into the breakaway cylinder. As the breakaway cylinder retracts to allow the wing to pivot, pressure builds in the system in three stages. First pressure builds along an accumulator pressure curve until a relief valve in the hydraulic system actives to initiate the second stage wherein oil is dumped through the relief valve. Thereafter, pressure is again allowed to build along the same accumulator curve to absorb impact hydraulically before the cylinder reaches full stroke. The staged pressure buildup prevents boom momentum from gaining and loads from increasing above the strength of the overall structure.

A dispenser for flowable media is provided, which operates in user-independent manner with respect to the pressure buildup and dosage quantity. On pressing on an operating head (35) a piston rod (29) is forced into a pump cylinder. As the pump chamber (52) is sealed by means of a delivery valve (51), which operates in path-dependent manner as a slide valve, under the action of a spring (42) pressing on the piston collar (43), a pressure builds up in the pump chamber (52), which is released following a predetermined length of travel on opening the delivery valve. A relatively constant pressure can be obtained over the entire discharge phase through the pretension of spring (42).

A vent assembly is disposed within an interior space of a vehicle for opening and closing fluid communication between the interior space and an exterior of the vehicle. The vent assembly includes a housing defining a plurality of openings and a plurality of vanes disposed in the openings. An actuator mechanism moves the vanes between an open position and a closed position, and includes a shaped memory alloy (SMA) member for actuating the vanes between the open and closed positions. The SMA member is activated when a hatch of the vehicle is open to move the vanes into the open position and thereby open fluid communication between the interior space and the exterior to alleviate excessive air pressure buildup during closure of the hatch.

A process and system is provided for briquetting particulate matter such as moisture-containing bituminous and sub-bituminous coal. This process includes partially drying the particulate matter and feeding, the partially dried particulate matter to a briquetting apparatus under conditions such that water vapour is released from the particulate matter during feeding. The particulate matter is passed through briquette forming rollers to form briquettes. The released water vapour substantially displaces or prevents the ingress of a large proportion of other gaseous components from the atmosphere surrounding an / or intermixed with the particulate matter. The particulate matter that is fed to the briquetting apparatus is surrounded by and intermixed with a gaseous component containing 70 to 100% by volume of water vapour at the point where it enters the briquette-forming part of the briquetting apparatus, such that when the particulate matter is compressed during briquette formation, the water vapour liquefies and the pressure buildup of gaseous material in the thus-formed briquettes is minimised. This reduction in the pressure buildup of gaseous components also acts to reduce blow-back of gases as the coal fines are being formed into briquettes.

The invention discloses a composite drive-by-wire brake system and brake control method for independently controlling four-wheel pressure. Two electromechanical brake modules in the system are both electromechanical pressurizing units in signal connection with an electronic control unit, two electronic hydraulic brake modules are both connected with a brake main cylinder pipeline in a brake pedalmechanism, each electronic hydraulic brake module is composed of a normally open switch electromagnetic valve, an electronic hydraulic pressurizing unit, normally open linear electromagnetic valves and a brake wheel cylinder in series sequentially through pipelines, pressure sensors are arranged on a connecting pipeline of the brake wheel cylinder, the electromagnetic valves, the electronic hydraulic pressurizing units and the pressure sensors are all respectively in signal connection with the electronic control unit; the brake control method comprises a brake control method of an effective state of electrifying and a brake control method of a failure state of outage. The composite drive-by-wire brake system and brake control method for independently controlling four-wheel pressure can overcome the deficiency of a single line control system, can independently achieve rapid pressure buildup of four wheels and accurately control pressure, and have functions of failure braking and regenerative braking.

The invention provides a control method and system for low-speed active safety execution of an automobile. A low-speed active safety execution system control strategy is designed, data information collected by a short-distance ultrasonic radar and a panoramic camera is collected, surrounding information is detected, and the problem that the automobile has the risk of colliding with obstacles within the range of 4 m around is solved; data of two sensors are fused, the influence of gradient changes on the distance value is considered, pressure buildup compensation is carried out on the initial pressure value of brake force, the action intention of a driver is analyzed, and coordination control is carried out over real-time operation behaviors of the driver and the functions of the low-speedemergency brake execution system control strategy; and the problem about driving active safety of the automobile in the low-speed state is solved, and for the active safety function of the vehicle inthe low-speed state, stability is increased, and safety reliability is improved.

Catheter for inserting into a hollow organ, in particular a blood vessel, wherein at least one tube- or balloon-like flexural element (12, 12a, . . . , 12l) which can be filled with a filling medium is provided inside the catheter, which flexural element is flexible in the non-pressurized state and stiffens as a result of pressure buildup internally and assumes a predetermined curved shape.