6162 results about "Piston cylinder" patented technology

A method and apparatus for introducing pilot fuel into a piston cylinder of an operating gaseous fuelled internal combustion engine monitoring a set of engine parameters, determining engine load and engine speed from the set of engine parameters, introducing a first portion of the gaseous fuel into the cylinder where the first portion of gaseous fuel forms a substantially homogeneous mixture comprising gaseous fuel and air prior to combustion, and introducing a pilot fuel to avoid a excessive knocking range for the engine. A second quantity of gaseous fuel can also be added to burn in a substantially diffusion combustion mode.

A subsea actuator and method is disclosed that includes all moving components mounted in a compact, concentric configuration. The subsea actuator is highly reliable and will operate at depth even with zero valve body cavity pressure. A preferably cup-shaped spring pusher is provided in telescoping relationship to the hydraulic chamber. A piston position indicator is provided which is connected externally to the hydraulic piston cylinder to avoid the possibility of hydraulic leaks due to the piston indicator. A manual override may be provided with a manual override indicator. The manual override indicator has a shorter travel length than the manual override operating stem to thereby reduce the overall length of the manual override assembly. The driving stem provides a removable connection to the hydraulic piston from the top of the actuator housing and a quick disconnect permits disconnection of the driving stem from the valve stem. In a preferred embodiment, upper and lower t-slot connections are utilized in the driving stem assembly. In a preferred embodiment, two back seat valves are removably secured to the driving stem to engage respective seats and provide additional sealing around the driving stem so as to prevent leakage between the valve chamber and actuator housing chamber. The high tension spring does not need to be removed to perform maintenance, and all wear items and seals are readily accessible. Change or replacement of the stem packing is made from the top of the bonnet to avoid dissasembling the bonnet to valve body connection. Pre-load bolts are used to adjustably preload the tension in the return spring. The height/weight of the actuator is significantly reduced as compared to prior art subsea valve actuators.

The invention relates to a hydraulic twin clutch for a transmission with two transmission input shafts, preferably for a power-shift transmission in motor vehicles, with concentric arrangement of the two transmission input shafts, a driven clutch housing, two hydraulically actuated clutches with friction disks and annular piston-cylinder units, the first clutch connecting the clutch housing selectably to the first transmission input shaft and the second clutch connecting the clutch housing selectably to the second transmission input shaft. It is distinguished by the fact that the two clutches are arranged adjacent one another, separated by a clutch web firmly connected to the clutch housing, and the two piston-cylinder units provided for the actuation of the clutch are likewise arranged adjacent one another and separated by the clutch web, between the clutches and the transmission input shafts, on a smaller diameter than the clutches. The essential advantages are compact construction combined with high torque capacity and the possibility of achieving complete compensation of the centrifugal-force-dependent pressures in the working chambers through the provision of a compensating chamber.

An internal combustion engine and method of operating an engine is provided. The engine comprises a piston cylinder formed within an engine block, an engine head secured to the engine block, a primary piston configured to slide within the piston cylinder, a main combustion chamber that is defined by the primary piston, piston cylinder, and engine head, a variable volume prechamber formed within the engine head and in fluid communication with the main combustion chamber, an ignition device configured to ignite a fuel within the prechamber, and a prechamber piston configured to translate within the prechamber. Translation of the prechamber piston within the prechamber varies the volume within the prechamber. The engine is characterized in that the prechamber comprises at least one orifice that provides fluid communication between the prechamber and the main combustion chamber.

A method and apparatus for introducing gaseous fuel into a piston cylinder (310) of an operating internal combustion engine in two separate stages involves monitoring a set of engine parameters, determining engine load and engine speed from the set of engine parameters, in a first stage, introducing a first portion of the gaseous fuel into the cylinder (310) where the first portion of gaseous fuel forms a substantially homogeneous mixture comprising gaseous fuel and air prior to combustion, and in a second stage, occurring sequentially after the first stage, introducing a second portion of the gaseous fuel into the cylinder (310). The gaseous fuel quantity is variable in response to at least one of engine load and engine speed. Initiation and duration for at least one of the first and second stages is also variable in response to at least one of engine load and engine speed.

A vibration reduction apparatus for use with a hammer tool having a hammer piston is disclosed. The hammer piston is caused to reciprocate in the cylinder by rotation of a gear wheel and crank drive. A cam is mounted around the gear wheel, a counterweight surrounds the piston cylinder, and a cam follower is provided on the counterweight. The cam follower on the counterweight is urged into contact with the cam by a biasing element. The external profile of the cam is such that rotation of the gear wheel causes oscillation of the counterweight in anti-phase to motion of the hammer piston to counteract vibrations produced by operation of the hammer action of the tool.

A compact height adjustable work station utilizes a unique combination of support arms and linkages to achieve greater strength and a greater range of tabletop height adjustment from a smaller form factor than is found anywhere in the industry. The method for adjusting the work surface height is user operated and pressure assisted whereby the user requires a minimal effort to physically lift or lower the work surface to the desired tabletop height. The pressure assist can be variably located to counterbalance different tabletop weights. For automatic counterbalancing, an elongated extensible gas spring piston-cylinder is adapted to be locked in any of its continuous range of infinite adjusted positions. Manual unclamping frees the counterbalancing gas spring for readily changed, manual tabletop height level adjustment. A mid-range level or a high tabletop level may be achieved, adjusted by unclamping and minimum manual force.

A bionic mechanical fish is composed of casing consisting of upper and lower halves, chest fins driven by step motor, tail unit consisting of tail fin, skin, frame, and fixing plate, and driven by linear motor, detecting unit consisting of miniature camera head, infrared sensor and pressure sensor, control unit comprising microcontroller, information acquisition module, motor driver and communication module, and float regulating unit consisting of linear motor and piston-cylinder reciprocating unit.

A suspension system for motor vehicles with level regulation for adjusting a predetermined height of the vehicle body includes at least one piston-cylinder unit with a work cylinder, a piston rod and a damping piston having damping valves. A pump is connected between an oil reservoir and the piston cylinder unit via corresponding inlet and outlet lines. The pump is driven by a drive unit and the level height is detected by a sensor which acts on the drive unit or on a regulating valve via evaluating electronics.

An external combustion engine is disclosed. The external combustion engine containing a working fluid and including a burner element for heating the working fluid of the engine, at least one heater head defining a working space containing the working fluid, at least one piston cylinder containing a piston for compressing the working fluid, a cooler for cooling the working fluid, a crankcase. The crankcase includes a crankshaft for producing an engine output, a rocking beam rotating about a rocker pivot for driving the crankshaft, a piston rod connected to the piston, a rocking beam driven by the piston rod, and a connecting rod connected at a first end to the rocking beam and at a second end to a crankshaft to convert rotary motion of the rocking beam to rotary motion of the crankshaft. The external combustion engine also includes an airlock space separating the crankcase and the working space for maintaining a pressure differential between the crankcase housing and the working space housing and an airlock pressure regulator connected between the crankcase and one of the airlock space and working space.

The invention relates to a method and to a device for examining the properties of the global, in particular the primary, hemostasis functions in whole blood or platelet-rich plasma, comprising a storage chamber (15) for the blood to be examined, a reaction device (39) having at least one flow path (5, 16) via which the blood to be examined is transported for carrying out certain reactions, a conveyor device (1) which conveys a volumetric flow for the transport of the blood through the reaction device (39), thereby generating a conveyor pressure, a pressure gauge (8, 9) which in a blood-free pressure gauge chamber (3) measures changes in the conveyor pressure which appear depending on the reactions of the blood to be examined which have taken place in the reaction device (39), a blood collection chamber (10) for collecting the blood transported through the reaction device (39), the conveyor pressure in a pressure-sealed working chamber (12) being generated by a piston-cylinder system (1), a working surface (33) of the piston (4) forming a boundary of the working chamber (12), and the working chamber (12) being formed by the blood collection chamber (10) and the blood-free pressure gauge chamber (3). According to the method of the invention, the volumetric flow is preferably adjusted, depending on the measured pressure of the volumetric flow, in such a way that the shear rate or the shear force, whose action in the reaction opening causes blood components, in particular thrombocytes, to deposit, follows a predetermined characteristic curve and in particular is held constant.

One kind of mechanical type automatic vertically well-drilling tool, including turner, the conduction current head, the bearing, the counterweight, the spindle, in-tube, the back plate, above plate-valve, gets down plate-value, the shell, the piston cylinder back plate and the piston, its principle is at the right moment induces the well slanting gravity signal, by the gravity-actuates in the organization, the establishment drills inside and out the column high-low pressure channel between the fluid, uses two between the differential pressure, actuates the piston at the right moment to push depends on the wall of a well is high side, the wall of a well reacting force then pushes the drill bit to is low side, but in well-eye other positions, the piston does not push depends on the wall of a well, drills the column revolves, this process circulation reciprocation, the well is slanting namely is unceasingly induced and the revision, this invention realization is initiative, At the right moment guards against slanting at the same time, but also can effectively liberate distilling, largely enhances drills fast and well-eye the quality, reduces the construction risk, this invention has the structure is simple, reliable, is suitable to the many kinds of well drilling platform, the processing makes the maintenance cost is low and so on the characteristic.

Provided are a coal and rock mass stress orientation monitoring method and device. The device comprises a three-way valve, a pressure gage, a high-pressure oil pump, a cylinder body pressure sensor. The cylinder body pressure sensor is provided with three piston sensing pieces which are connected with piston cylinders of the piston sensing pieces respectively. The outer ends of high-pressure oil pipes connected with the piston cylinders are connected with the pressure gage or a data converter connected with a data collector and the high-pressure oil pump through the three-way valve respectively. After the cylinder body pressure sensor is arranged in a drilling hole, the cylinder body pressure sensor bears pressure by injecting oil liquid, the piston sensing pieces can be automatically adaptive to good coupling with a coal and rock mass, and stress magnitude and changing in the three directions in the coal and rock mass can be monitored. Monitoring can be carried out on an original rock mass and in a broken coal and rock mass, the coal and rock mass stress orientation monitoring method and device can be widely used in geostress measurement, surrounding rock stability analysis and the like of mines, construction, water conservancy, roads, tunnels and underground engineering.

Disclosed is a vacuum packaging bag. Three edges of the bag are sealed and one edge is equipped with a concave-convex fastener. The bag is equipped with a deflating device. The deflating device consists of a base, a holding washer, a cover, and a sealing washer. The cover and the based are connected through screw threads. The base is placed inside the bag. The screw part of the base penetrates through one side of the bag. The holding washer fastens the film against the base. The sealing washer is placed on a support. The support is placed in the passageway between the base and the outside of the bag. The middle of the cover has a pressure post which is connected to the sealing washer. The middle of the pressure post has an opening to the outside of the bag. A deflating cylinder is used with the deflating device of the bag. The deflating cylinder is a piston cylinder. The front part of the piston rod has two holding boards. Between the holding boards there is a spacer. The backside board has a notch; the back part of the piston rod is connected to a pulling handle. On the front part of the cylinder is a convex. A pulling ring is attached to the convex. The vacuum packaging bag of the invention is simple in structure, easy to make, and convenient to use. It ensures the stored goods quality and value.

The invention relates to a winch heave compensation device for an ocean floating drilling platform. The device comprises an active compensator and a passive compensator which are arranged on one side of a winch in parallel. The active compensator comprises a first single-rod piston cylinder with a piston rod stretching upwards and a force transducer, wherein two chambers of the first single-rod piston cylinder are connected to a hydraulic system through a three-position four-way magnetic exchange valve, and the force transducer is used for detecting force on a steel wire rope and electrically connected with a force feedback controller which controls exchange actions of the three-position four-way magnetic exchange valve. The passive compensator comprises a second single-rod piston cylinder with a piston rod stretching upwards. Tops of the piston rods of the first piston cylinder and the second piston cylinder are connected onto a movable pulley, a fixed pulley is further arranged on the drilling platform, and the steel wire rope on the winch is connected with a crown block and a traveling block after bypassing the movable pulley and the fixed pulley sequentially. According to the device, the compensation effect that active compensation and passive compensation are mutually synchronous and promoted can be achieved.

The invention relates to an electric control pneumatic cardio-pulmonary resuscitation machine and belongs to the field of medical machinery. The machine is used for cardio-pulmonary resuscitation emergency treatment for sudden cardiac arrest of a patient. The electric control pneumatic cardio-pulmonary resuscitation machine structurally comprises a rigid fixing press bow and an equal-altitude back plate. The press bow is composed of fixing rods with scale display, movable sliding rails, a press piston cylinder, a resetting spring and a recessed face press head. The press bow is connected with fixed locks on movable sliding rails on two sides of the equal-altitude back plate through the fixing rods on two sides and is capable of moving vertically through the two fixing rods. A chip control circuit board, an electromagnetic valve, a pressure adjusting valve, a stabilizing air storage cylinder and the like are arranged in the equal-altitude back plate. The equal-altitude back plate has certain inclination, so that doctors can conveniently open an air channel of the patient. The machine utilizes the principle that the machine is controlled by chip circuit board program, press and ventilation are accurately controlled by an electromagnetic valve, press depth and ventilation quantity are controlled by a pressure adjusting valve, system pressure can be compensated by a stabilizing air storage cylinder, and continuous pressure output and ventilation can be ensured. The machine is suitable for cardio-pulmonary resuscitation emergency treatment of the patient suffering from pre-hospital cardiac arrest and in-hospital cardiac arrest.

An apparatus for controlling vertical movement of a tubular within a wellhead includes an anchor spool connected atop the wellhead, and a detachable superstructure supporting the tubular. The anchor spool provides connectors for detachably connecting bottom ends of at least two piston cylinders of the detachable superstructure. The tubular may be a landing joint or a high-pressure mandrel of either a well stimulation tool, or a well isolation tool. The apparatus provides unobstructed access to a top end of the tubular. The anchor spool includes an elongated sidewall and an axial passage through which a tubing hanger can be reciprocated. The height of the sidewall permits the apparatus to be used for landing/removing a tubing string even if the anchor spool is mounted directly to a blowout preventer (BOP).

The invention belongs to the technical field of glass curtain wall cleaning devices, particularly relates to a glass curtain wall cleaning device. The glass curtain wall cleaning device comprises a plurality of sucker components, a rack, a cleaning roll brush and a cleaning motor, wherein the sucker components and the rack are connected through a moving pair and a walking device; brushes are arranged on the periphery of the cleaning roll brush; the cleaning roll brush is connected with the rack through a rotating pair; an output shaft of the cleaning motor is connected with a shaft of the cleaning roll brush; each sucker component comprises a sucker, an adsorption piston rod, an adsorption piston cylinder and an adsorption piston; each adsorption piston rod and the corresponding adsorption piston are combined to form a whole body, and then are combined with the corresponding adsorption piston cylinder to form a corresponding adsorption air cylinder; the tail end of each adsorption piston rod is fixedly connected with the corresponding sucker; a hole is formed in the center of each sucker, extends to the back surface of the sucker and is an adsorption hole; and two connecting holes are formed in each adsorption piston cylinder, are a front cavity hole and a rear cavity hole respectively, and respectively communicate with a front cavity and a rear cavity of the corresponding adsorption air cylinder. By the glass curtain wall cleaning device, fall accidents of personnel are stopped, operation safety is improved greatly, and work limiting conditions are reduced.