2787 results about "Plunger" patented technology

A fluid end includes a first sleeve associated with a plunger bore, a second sleeve assembly associated with a suction bore, and a packing sleeve retainer positioned at the plunger bore to axially retain a packing sleeve of the first sleeve assembly within the plunger bore, the packing sleeve retainer being coupled to a front face of the fluid end. The fluid end further includes a suction ring positioned at the suction bore to axially retain a suction sleeve of the second sleeve assembly within the suction bore, the suction ring being coupled to a rear face of the fluid end.

A fluid end, includes a plunger reciprocating within a first bore, the plunger increasing a pressure of a fluid within a pressure chamber. The fluid end also includes a second bore. The fluid end further includes a plug assembly associated with the second bore. The plug assembly includes a plug body positioned within the second bore. The plug assembly also includes a lock ring positioned, at least in part, within the second bore, the lock ring positioned to be driven radially outward responsive to a longitudinal force applied to the plug body.

The invention discloses a plunger piston shoe assembly inner contour measuring method, device and equipment and a storage medium, liquid is added into an inner contour space of a plunger piston shoe assembly, the liquid adding amount in the inner contour space and the pressure in the inner contour space are obtained, and the mapping relation between the liquid adding amount and the pressure is established, the inner contour space comprises a gap between the wrapping and pressing part and the ball head part, a ball head hole and a wrapping and pressing hole; a first area and a second area in the mapping relation are obtained, the first area is used for representing the relation between the liquid adding amount and the pressure when a part of the gap and the ball head hole are filled with liquid, and the second area is used for representing the relation between the liquid adding amount and the pressure when the other part of the gap is filled with the liquid; and establishing a coordinate system, and calculating the inner contour of the wrapping and pressing part according to the physical properties of the liquid, the first region and the second region. According to the method for measuring the inner contour of the plunger piston shoe assembly, the inner contour of the wrapping and pressing part of the plunger piston shoe assembly can be nondestructively detected.

A lower plunger of a pogo pin according to the present disclosure includes a metal pin and an electro-conductive rubber, and the electro-conductive rubber having a configuration in which a plurality of electro-conductive particles are contained in an elastic insulating material is attached to a lower end of the metal pin to increase a contact area between the lower plunger and a pad of a test board through a surface contact, thereby preventing the occurrence of inductive spikes and thus improving signal quality in a high-speed signal transmission environment.

Provided is an injection device for injecting a substance, comprising a case receiving a barrel containing the substance to be injected and comprising a stopper movable inside the barrel, a plunger unit comprising a triggering portion, the plunger unit being coupled to the stopper and movable with regard to the case from an initial, proximal position to a final, distal position to inject the substance when the barrel is provided into the case, an end-of-dose indicator movable from a hidden position to a visible position in which at least one portion of the end-of-dose indicator is visible to a user, hiding means for locking the end-of-dose indicator in the hidden position and configured to be unlocked by the triggering portion of the plunger unit when the plunger unit reaches an indicator position.

A fastener assembly includes a shank having a threaded portion for guiding the fastener assembly into a correspondingly threaded portion of another fastener or a working surface and a head engaged with the shank for receiving a tool. The head defines a cutout for receiving an insert. The insert includes a housing for being fit into the cutout to secure the insert to the head and a compressible fastener plunger defining a recess for receiving a working end of a tool. The compressible fastener plunger is configured for translation within the housing along a longitudinal axis. The housing interferencingly engages the compressible fastener plunger to limit upward movement along the longitudinal axis.

The application discloses a kind of micro flow high pressure hydraulic diaphragm metering pump, including pump head and pump body, diaphragm piece is equipped between the pump head and pump body, pump head, including pump head body, feed valve and discharge valve;Pump body, including pump body and plunger assembly, plunger assembly is driven to diaphragm piece by reciprocating motion, plunger assembly includes cylinder sleeve, cylinder sleeve inside is equipped with plunger cavity, plunger cavity is equipped with plunger in cooperation, at least one oil supplement cavity is equipped in plunger cavity, plunger and cylinder sleeve are also equipped with combined sealing mechanism between it.The application is optimized plunger assembly, utilizes long axis plunger, forms small capacity hydraulic oil cavity, with the rapid reciprocating motion of plunger, can realize the high frequency small scale reciprocating operation of diaphragm piece, is suitable for the transmission of small size gauge medium flow passage in pump head, realizes micro high pressure output.

The invention discloses an ejector pin anti-fatigue strengthening method based on multi-section variable-temperature treatment, and relates to the technical field of ejector pin anti-fatigue strengthening, and the ejector pin anti-fatigue strengthening method comprises the following steps: austenitizing high-temperature quenching: heating an ejector pin to an austenitizing temperature, and then carrying out zoned cooling on the ejector pin; medium-temperature tempering and thermal-state mechanical strengthening are conducted, specifically, the ejector pin is tempered at the medium-temperature tempering temperature, and thermal-state shot blasting or laser shock is conducted on the ejector pin in the heat preservation period or after heat preservation is completed; intermediate low-temperature plasma nitriding: carrying out plasma nitriding in a nitrogen-hydrogen gas environment; subzero treatment: placing the ejector pin in liquid nitrogen; and finally, low-temperature tempering and cold-state mechanical strengthening are conducted. Through multi-section temperature gradient treatment, phase change distribution control over different temperature sections is achieved, too high internal stress and brittleness generated by one-time quenching are avoided, sudden size change and hot cracks induced by phase change are prevented, a controllable surface-core hardness and toughness gradient is formed, the surface crack initiation tendency is reduced, and the surface quality is improved. And the consistency and controllability of anti-fatigue basic conditions are improved.

The present invention relates to a detachable spraying machine, including a front end cover, a drive motor, a pump assembly, a reduction gearbox, an eccentric shaft, an eccentric bearing, and a slide mechanism. The slide mechanism includes a sliding member and a detachable pressure plate. The pressure plate and the front end cover form a track, and the sliding member slides in the track. The drive motor drives the eccentric bearing via the reduction gearbox and the eccentric shaft. The rotary motion is converted into reciprocating motion through the opening of the sliding member, driving the plunger rod of the pump assembly to work.

The invention discloses a plunger piston shoe assembly inner contour measuring method, device and equipment and a storage medium, the plunger piston shoe assembly inner contour measuring method comprises the following steps: filling the inner contour space of a plunger piston shoe assembly with liquid; liquid in the inner contour space is discharged, the liquid discharge amount in the inner contour space and the pressure in the inner contour space are obtained, and the mapping relation between the liquid discharge amount and the pressure is established; a first area and a second area in the mapping relation are obtained, the first area is used for representing the relation between the liquid discharge amount and the pressure when the liquid in one part of the gaps and the liquid in the ball head hole are discharged, and the second area is used for representing the relation between the liquid discharge amount and the pressure when the liquid in the other part of the gaps is discharged; and establishing a coordinate system, and calculating the inner contour of the wrapping and pressing part according to the physical properties of the liquid, the first region and the second region. According to the method for measuring the inner contour of the plunger piston shoe assembly, the inner contour of the wrapping and pressing part of the plunger piston shoe assembly can be nondestructively detected.

A hitch pin assembly includes a hitch pin, a lock housing and a magnet on the lock housing. The magnet releasably attaches the lock housing for rotation around an aperture through the receiver tube. A plunger in the lock housing extends through the magnet and into the receiver tube. When a shank of a hitch assembly is inserted into the receiver tube and apertures on the shank and receiver tube align, the plunger extends through the apertures and holds the shank in position. A hitch pin is inserted through the opposite side of the receiver tube and into the lock housing. Flat exterior surfaces on the hitch pin are positioned between flat interior surfaces in the lock housing and hold the hitch pin against rotation as a rod in the lock housing is rotated into the hitch pin securing the rod and hitch pin together.

An accessory facilitates loading and unloading of cartridges into a firearm magazine and includes a main body having a top end with a top opening, a bottom end with a bottom opening, a wall portions extending between the top and bottom ends and defining therebetween a body cavity in communication with the top and lower openings and also defining a front opening in communication with the body cavity. A first portion of the body cavity can receive a cartridge from the front opening and a second portion of the body cavity can receive an open end of a portion of a firearm magazine from the bottom opening. A thruster is movably coupled to the main body and mounted to the main body above the top end, and includes a plunger which is movable into and out of the first portion of the body cavity through the top opening.

A razor has a handle and a rotatable head assembly coupled to the handle. The rotatable head assembly has a magnetic pickup adapted to draw a blade from a blade cartridge to the rotatable head assembly. The rotatable head assembly has a blade platform to contain the blade, head flap rotatable about the blade platform, and hinge between the blade platform and the head flap. The blade platform has a ball plunger to contact the external source and a keyed riser to hold the blade. A stand supports the razor over a vertical surface or horizontal surface. The blade cartridge has a housing, blade drawer disposed within the housing, and roller disposed over the blade drawer to pick up a blade from the blade drawer. The blade drawer has a blade platform to hold a plurality of blades, and spring element to apply pressure to the blade platform.

The invention relates to the technical field of shock absorption, and discloses a frequency self-adaptive shock absorber which comprises a cylinder body, a piston assembly and a frequency response structure. The piston assembly comprises a piston body and a piston rod. The frequency response structure is integrated in the piston rod and comprises a communicating channel, a mounting hole, an adjusting rod, an elastic piece and a plunger sleeve, the plunger sleeve is arranged in the communicating channel, a conical convex part is arranged at one end of the adjusting rod, an overflowing gap is formed between the peripheral face of the conical convex part and a port of the plunger sleeve, and the elastic piece is connected with the end, deviating from the plunger sleeve, of the adjusting rod. The frequency response structure is integrated in the piston rod, the elastic piece made of the nonlinear elastic material is used for sensing the oil pressure frequency change, the adjusting rod is driven to move in combination with the oil pressure, the damping force can be reduced at high frequency and increased at low frequency, and self-adaptive adjustment of the damping force of the shock absorber under high and low frequency vibration road conditions is achieved. According to the design, a complex frequency control valve does not need to be additionally arranged, and the cost, the structural complexity and the overall size of the damper can be remarkably reduced.

Disclosed herein are automatic-locking and automatic-unlocking syringes, and associated systems and methods. In some embodiments, a syringe can include a barrel, a plunger assembly slidably positioned within the barrel, and a locking assembly coupled to the barrel. The syringe is configured to (i) automatically lock the plunger assembly to the locking assembly when the plunger assembly is withdrawn through the barrel with a vacuum in the barrel, (ii) automatically unlock the plunger assembly from the locking assembly when the barrel no longer experiences vacuum and / or experiences negligible vacuum, and / or (iii) inhibit or even prevent automatic locking of the plunger assembly to the locking assembly when the plunger assembly is withdrawn through the barrel with no and / or negligible vacuum within the barrel.

A work machine includes: a motor; a plunger that is reciprocated in the front-back direction by the drive of the motor; a transmission mechanism that converts a rotational driving force of the motor into a reciprocating driving force and transmits the reciprocating driving force to the plunger; a first support that supports the plunger to be capable of reciprocating and is disposed on one side of the plunger in an orthogonal direction orthogonal to the front-back direction; a second support that supports the plunger to be capable of reciprocating and is disposed on the other side of the plunger; and a support member that supports at least one of the first support and the second support such that the distance between the first support and the second support in the orthogonal direction can be changed.

A wire-rope-system includes a guide-cylinder, compression-spring, plunger and wire-rope for reducing a tailgate's opening-speed in a vehicle / trailer having a side-board-wall-or-tailgate. The guide-cylinder arranged within the sideboard-wall-or-tailgate has front-end-and-back-end-portions. The compression-spring arranged within the guide-cylinder has front-and-back-ends. The compression-spring's front-end attaches to the guide-cylinder's front-end-portion and its back-end attaches to the plunger that moves axially within the guide-cylinder. The wire-rope extends through the front-end-portion's opening, and has backend-and-front-ends attached to the plunger and the side-board-wall-or-tailgate. The plunger's slide-membrane's circumferential-edge abuts the guide-cylinder's inner-wall, separating the guide-cylinder's inner-space into a back-air-chamber between the slide-membrane's rear-side and guide-cylinder's back-end-portion, and into a front-air-chamber between the slide-membrane's front-side and guidecylinder's front-end-portion. The back-air-chamber's air-flow-regulating-opening connects to the guide-cylinder's exterior-side. The slid-membrane's configuration blocks / reduces movement towards the front-end-portion and air-flow between the front-air-chamber's circumferential-edge and the guide-cylinder's inner-wall to the back-air-chamber, damping the wire-rope's movement and reducing the tailgate's opening-speed.

The invention provides a device and method for repeatedly installing drip irrigation emitters into drip irrigation tubing. The device can be provided with a magazine capable of holding a plurality of drip irrigation emitters. The magazine feeds individual drip irrigation emitters to a plunger and sleeve arrangement that cooperate to guide the drip irrigation emitters through the device's housing and into a section of drip irrigation tubing.

An auto-injector for administering a dose of a liquid medicament includes an elongate tubular case and a carrier subassembly including a tubular carrier slidably arranged inside the case. The carrier is adapted to contain a syringe with a hollow injection needle, a drive spring, and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier, wherein the drive spring acts between the carrier and the plunger, wherein the plunger, in an initial state, is locked to the carrier by a ramped engagement to the carrier and by being prevented from rotating out of this ramped engagement, depending on a relative longitudinal position of the carrier in the case, and wherein the plunger is arranged to be released for rotating out of the ramped engagement.

The invention discloses a high-pressure straight-through plunger type throttle valve, and particularly relates to the technical field of throttle valves, the high-pressure straight-through plunger type throttle valve comprises a valve body, a plunger rod, a limiting fixer and a through-flow seat, a straight-through flow channel is arranged in the valve body, a plunger rod mounting hole is further formed in the valve body, the plunger rod is rotatably mounted in the plunger rod mounting hole, and the plunger rod is rotatably mounted in the through-flow seat. A limiting fixator is detachably installed at the position, corresponding to the top end of the plunger rod, of the valve body, a channel hole is formed in the bottom end of the plunger rod, the through-flow base is detachably installed in the channel hole, and through opening sealing rings are arranged at the positions, corresponding to the inlet end and the outlet end of the through-flow base, of the outer surface of the plunger rod. The valve body is of a channel straight-through type structure, the energy consumption loss of equipment is reduced, the direction of a medium flow channel does not need to be changed, the occupied well site space is small, the layout problem is solved, meanwhile, additional equipment brought by an angle type fixed throttling valve is reduced, cost is reduced, and disassembly and assembly are more convenient.

Devices and methods are provided for delivering gas. In one example, the device includes a syringe body including a proximal end, a distal end including an outlet and a gas chamber communicating with the outlet, and a plunger carrying a piston slidably received within the syringe body. A canister containing a gas is provided within the plunger adjacent a passage through the piston communicating with the gas chamber. A drive actuator is movable to cause an opener pin to open a septum of the canister and release the gas, whereupon the gas travels through the passage into the gas chamber, thereby displacing the piston proximally to fill the gas chamber. Once activated, the plunger may be advanced to deliver the gas within the gas chamber through the outlet into a patient's body, e.g., into an eye via a cannula connected to the outlet.

A pump includes a power end and a fluid end coupled to the power end. The power end includes a plunger, and the fluid end includes a crossbore in selective fluid communication with inlet and outlet bores. A suction valve controls fluid communication between the inlet bore and the crossbore, and a discharge valve controls fluid communication between the outlet bore and the crossbore. An actuation device is used to move the discharge valve between an open position and a closed position. A position sensor measures a position of the plunger. A pressure sensor measures a pressure of the crossbore, the inlet bore, or the outlet bore. A controller operates the discharge valve based on data from at least one of the position sensor or the pressure sensor.

A proportional actuator, and a unibody magnetic housing for use in a proportional actuator. The proportional actuator includes a coil assembly with a coil and coil cover; the coil assembly is fitted to the unibody magnetic housing to form a magnetic coupling. The unibody magnetic housing includes a wall having a region of varying wall thickness, which may be formed by an annular groove, and a central bore in which a plunger may be slidably mounted so that its end moves along the region of varying wall thickness as it slides within the central bore.

A high-pressure water pump based on water or aqueous solution lubrication comprises a water pump water inlet, a hydraulic cylinder body, a shell, a plunger cavity, a plunger and a driving mechanism. A communicating flow channel for supplying water to the water inlet one-way valve is arranged between the accommodating space and the water inlet one-way valve; water or a water solution flows through the containing space through the water inlet of the water pump and then flows to the water inlet one-way valve through the communicating flow channel to achieve water supply of the water pump. According to the utility model, the movement mechanism in the accommodating space is fully cooled and lubricated. By means of the special design of the communication flow channel from the containing space to the hydraulic cylinder body and the communication flow channel with the specific size and shape such as small holes or slits, the flowing resistance of water or aqueous solution is increased, and therefore the influence on pumping of the water or aqueous solution due to flow field turbulence is reduced, high-pressure water can be stably output, and the pumping efficiency of the water or aqueous solution is improved. Operation noise of the water pump is reduced, and working stability of the water pump is improved.

A pneumatic valve features a housing with an air chamber including a supply opening for compressed air, a connecting opening to an air cushion, and a discharge opening. An actuator with a movable closing element, comprising a plunger and a plate with a first sealing element, is positioned within the housing. The actuator includes a circuit board, an actuating element with an actuating portion and a bending portion, and a shape memory actuator element. In a non-energized state, the actuator element positions the actuating element to press the plunger against the supply opening, while in an energized state, it allows the first sealing element to close the discharge opening via an elastic element. A second sealing element closes the supply opening in a non-energized state and opens it under positive pressure when energized. A third sealing element, elastically connected to the second, closes the supply opening under non-positive pressure conditions.

A self-aligning power-assisted corn kernel cutting apparatus is provided. The apparatus includes a cylindrical shell ported housing coupled to an actuation mechanism at a first end and an annular cutting mechanism at a second end. The actuation mechanism includes a power-assisted piston rod coupled to self-aligning plunger via a spring and an inner plunger disposed within the self-aligning plunger. In operation a user places an ear of corn within the ported housing wherein self-aligning plunger is force down upon the ear causing the ear to align properly. Power assistance is provided to the actuation mechanism which forces the ear over the annular cutting mechanism ejecting kernels through at least one port into an optional toroidal bowl. Once actuation mechanism bottoms out inner plunger forces the cob through an ejection tube.

This invention relates to the field of oilfield thermal recovery well technology, and discloses a well completion process device, a column-type ground anchor, and a method for increasing the prestress of the oil layer casing. The well completion process device includes a surface casing (1) located below the surface, an oil layer casing (2), and a casing head body (3). The oil layer casing is connected to the inner surface of the casing head body via a connecting assembly (40). A column-type ground anchor (500) is connected to the bottom of the oil layer casing. The column-type ground anchor includes an anchor claw (502) and a plunger body (530). A liquid outlet (501) is formed on the column-type ground anchor. The anchor claw can extend out of the side wall of the plunger body and insert into the formation. Cement can be discharged from the liquid outlet to seal the annular gap between the oil layer casing and the formation. This invention uses hydraulic oil to insert the anchor claw into the formation, pulling the oil layer casing to a preset load. After the oil layer casing is pulled up, it is clamped to the inner wall of the casing head body via the connecting assembly, thus increasing the prestress.

The invention discloses a wear online identification and compensation control system and method for a high-pressure distribution plunger and barrel assembly, and the system comprises a data collection module which is used for collecting working condition data and state data; a health state dynamic baseline model obtained through offline training is arranged in the data processing module, and the wear level of the plunger and barrel assembly is recognized by calculating the residual error between actual state data and health state data predicted by the model under the current working condition; and the compensation control module is used for generating a self-adaptive compensation control instruction according to the identified wear grade and the current working condition and sending the self-adaptive compensation control instruction to an execution mechanism. According to the method, the dynamic base line synchronous with the real-time working condition is constructed, early weak wear characteristics can be separated from strong working condition interference, the recognition sensitivity and accuracy are improved, the influence of wear on the system performance is actively counteracted through closed-loop adaptive compensation control, the service life of equipment is expected to be prolonged, and the system performance is improved. And technical support is provided for predictive wear monitoring management.

The invention relates to the technical field of hydraulic system components, and discloses a high-pressure large-flow rotary oil distribution device which comprises a stator, a rotor, an oil distribution mandrel and a cam ring, the stator is provided with an oil inlet / outlet channel and a radial oil distribution cavity, and a plunger is arranged in the oil distribution cavity; the oil distribution mandrel is provided with two oil through holes which are perpendicular in the radial direction, and the front end gear is in meshing transmission with the fluted disc of the rotor. When the rotor rotates, the fluted disc drives the oil distribution mandrel to rotate accurately, the oil through hole periodically switches on and off of an oil way, the contour surface of the cam ring abuts against the tail end of the plunger to drive the plunger to reciprocate in the oil distribution cavity, and accurate matching of oil distribution action and power transmission is achieved. According to the device, a plurality of oil distribution mandrels are dispersed for bearing, so that the oil distribution mandrels can be designed in a small diameter, the influence of thermal expansion is effectively reduced, the problems of high-pressure leakage, clamping stagnation, low efficiency and the like of an existing device are solved by cooperating with gear synchronous transmission, the device can adapt to different power scenes, the high-pressure large-flow oil distribution requirement is met, the oil distribution efficiency is improved, the service life is prolonged, and the maintenance cost is reduced.

The disclosure relates to a drug delivery device including a plunger disposed within a case and an audible indicator that comprises a resilient element. The plunger is slidable from a proximal position to a distal position within the case and the resilient element is in a first configuration when the plunger is in the proximal position, such that the resilient element is deflected radially outwards to a second configuration during movement of the plunger from the proximal position towards the distal position. The resilient element moves from the second configuration towards the first configuration when the plunger moves towards or reaches the distal position, thereby generating an audible and tactile signal.