3610 results about "Plunger" patented technology

A drug delivery device may include a housing having an opening and a drug storage container including a delivery member having an insertion end configured to extend at least partially through the opening during a delivery state. The device may also include a guard moveably positioned adjacent to the opening and a plunger having a generally cylindrical body portion extending along a longitudinal axis of the container and at least one flange extending radially outwardly from the body portion, wherein the plunger is moveable toward the distal end of the container to expel a drug through the delivery member. The device may further include a plunger biasing member configured to urge the plunger toward the distal end of the container and a releaser member defining a guide configured to receive the at least one flange and an indicator configured to generate an audible signal indicating an end of drug delivery.

A fluid end includes a housing having a bore extending toward a cavity and a wear sleeve positioned within the bore. The fluid end also includes a plunger positioned within a plunger bore extending through the wear sleeve, the plunger reciprocating within the plunger bore. The fluid end further includes a wear sleeve retainer coupled to the housing and positioned to block axial movement of the wear sleeve, the wear sleeve retainer having external threads along a body that engage internal threads formed in the housing. The fluid end also includes an anti-rotation system, coupled to the housing, the anti-rotation system engaging the wear sleeve retainer to block rotation of the wear sleeve retainer in at least one direction. The fluid end further includes a packing nut coupled to the wear sleeve retainer.

Disclosed herein are devices for delivering fluid to an eye. The device may include a handle comprising a fluid assembly at least partially contained therein, the fluid assembly comprising a fluid reservoir, a plunger tube, and a displacement rod, where the plunger tube and displacement rod are configured to move relative to the fluid reservoir to deliver fluid during advancement of an elongate member. The device includes a cannula coupled to a distal end of a handle, and the elongate member slidably positioned within the handle. The handle includes a drive assembly where actuation of the drive assembly moves the plunger tube and the displacement rod in opposite directions during advancement of the elongate member. The drive assembly also comprises a first linear gear and a second linear gear, where the first linear gear is configured to move in a direction opposite the second linear gear.

The invention discloses a combined sealing device frictional wear and external leakage test bed and a test method thereof, and aims to solve the problem that the existing device cannot accurately know the sealing wear. The test bench comprises a rack, a test piece, a stay wire sensor, an oil pipe and a hydraulic system, wherein an oil tank is arranged in the rack. The test piece comprises a test sealing assembly and a plunger, and the stay wire sensor is connected with a sealing combination structure. During testing, the hydraulic system drives the plunger and the sealing assembly to move relatively, the pull wire sensor measures displacement, friction force is calculated by combining pressure data to reflect abrasion, and the oil groove collects leaked oil. According to the invention, comprehensive testing of friction, wear and leakage is realized, sealing performance and wear rules under multiple working conditions can be analyzed, the structure is convenient to observe and operate, and optimization of the sealing structure is facilitated.

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 firearm with ambidextrous bolt release mechanism includes a barrel and a bolt slideably mounted in the receiver for axial movement between forward closed breech position in battery with the barrel and a rearward open breech position. A recoil spring biases the bolt forward. A side-mounted bolt catch lever is configured and operable to selectively hold the bolt in the open breech position, and disengage the bolt to reclose the breech when manually actuated. A transversely movable actuator plunger allows a user to release the bolt from the side of the firearm opposite the bolt catch lever side. The plunger comprises an inclined camming surface which slideably engages a mating inclined camming ramp on the lever. Wedging action applied to the bolt catch lever by the plunger rotates the lever about its pivot axis to disengage and release the bolt.

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.

A fluid end made of a housing and a plunger reciprocating therein. The plunger has a hollow bore formed therein, and a valve assembly situated on one end of the plunger. The plunger may have a sleeve situated within the bore that aids in the installation of the valve assembly. The plunger may have a second bore extending perpendicularly from the hollow bore. The first bore may be connected to an attachment piece which connects to a conduit. The conduit may then be connected to a manifold which is configured to provide a fluid to the plunger's bore. The housing may be made of a static section and a plurality of dynamic sections. The dynamic sections may thread into the housing. The static section may be made of two pieces to aid with installation of a dynamic seal.

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.

Low-pressure oil enters an inlet of a proportional overflow valve, the pressure of a low-pressure system is controlled by the proportional overflow valve, pressure oil on the low-pressure side acts on a plunger control cavity of the hydraulic control overflow valve through a pressure stabilizing damper and a one-way valve, and hydraulic pushing force generated by a plunger is transmitted to an overflow valve steel ball through a disc spring; when the force obtained by multiplying the ultrahigh pressure of the inlet of the hydraulic control overflow valve by the action area of the steel ball is equal to the pushing force of the plunger, the steel ball of the overflow valve is opened to start overflowing, and the overflow pressure of the ultrahigh pressure system can be controlled by adjusting the pressure of the proportional overflow valve of the low-pressure system. The external control type ultrahigh-pressure proportional pressure regulating valve can be used for pressure regulation of a hydraulic system with the pressure being 200 MPa or above and can be used as a proportional overflow valve of an ultrahigh-pressure hydraulic system. By arranging a hydraulic loop of two auxiliary oil ports of the external control type ultrahigh pressure proportional pressure regulating valve, the pressure rising one-way proportional regulating function, the pressure unloading function and the pressure rising / falling two-way proportional regulating function of an ultrahigh pressure system can be achieved.

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.

The application relates to the technical field of liquid control check valves, and discloses a plug-in type large-flow liquid control check valve structure with an adjustable pilot ratio, which comprises a pilot valve block and a main valve core, the pilot valve block is provided with a protective cap, one end of the protective cap is provided with a first base, a limiting rod is movably connected in the first base, a guide plunger is in contact connection with one end of the limiting rod, a top rod is in contact connection with the bottom of one end of a rotating lever, a steel ball is in contact connection with the bottom of the top rod, the steel ball is movably connected in the second base, the second base is provided with a third return spring, the pilot valve block and the main valve core are composed of two-stage structures, the pilot valve block adopts a unique mechanical structure, the control pilot ratio of the liquid control check valve is changed by adjusting the limiting rod, the main valve core adopts a two-way plug-in valve, the characteristics of high flow capacity of the two-way plug-in valve are fully utilized, the problem of large flow is solved, and the designed flow of the application can reach 5000 L / min.

This invention provides a jacketed multi-way plunger device and its application, belonging to the field of pipeline engineering design. The jacketed multi-way plunger device includes a first plunger valve and a second plunger valve; a first pipeline is vertically connected to the end of the first plunger valve, and a second pipeline is obliquely connected to the first plunger valve; a third pipeline is vertically connected to the end of the second plunger valve, and the first pipeline and the second plunger valve are obliquely connected. This invention integrates the first and second plunger valves into one unit through the pipeline arrangement, achieving both pipeline shut-off and flow functions, while simultaneously enabling continuous material feeding.

The invention discloses an integrated rigidity damping inerter self-control type two-stage vibration reduction hydro-pneumatic suspension and a working method in the field of automobiles, a hollow plunger extends into an upper cavity of an oil cylinder, the lower end of the hollow plunger is fixedly connected with a piston, and an upper lifting lug runner is sequentially connected with an inerter pipe, an electric control throttle valve and a large hydro-pneumatic chamber through a first hydraulic oil pipe; a lower lifting lug runner is sequentially connected with a damper and a small oil gas chamber through a second hydraulic oil pipe, a built-in rigidity control valve outer cylinder with the lower end fixedly connected with a piston is arranged in the plunger, an inner cylinder with the upper end sealed and the lower end connected with the lower lifting lug through a spherical hinge is coaxially sleeved with the outer cylinder, and three rows of holes are formed in the side wall of the inner cylinder from bottom to top. Two rows of holes are formed in the side wall of the outer cylinder from bottom to top; the flow direction of oil liquid is changed when the suspension works, a seal does not need to be arranged on a piston, a longer oil through hole is formed in an outer barrel, the safety of the control valve is improved, a wheel dynamic vibration absorber is integrated to an oil cylinder, integration is achieved, an external rigidity control valve is replaced with an internal rigidity control valve, and the size of the whole suspension is reduced.

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.

A manifold for use with a fluid delivery system in a vehicle wash includes a fluid passageway with at least one fluid inlet and at least one fluid outlet. At least one integrated valve includes a plunger housing having an air chamber and is configured to receive a valve limiter and a valve plunger arranged therein, which is movable between a closed position and an open position to block a valve orifice and to permit the passage of fluid from the fluid inlet through the valve orifice for dispensing from the fluid outlet. At least one actuator assembly including an actuator, and the valve limiter is configured such that the actuator adjusts a position of the valve limiter to adjustably control an effective valve orifice area of the valve orifice based on a distance of movement of the valve plunger to the open position.

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 utility model belongs to the technical field of shock absorbers, and particularly relates to a hydraulic damping adjusting device of a shock absorber, the shock absorber comprises a hydraulic cylinder and a piston rod sleeved with a piston valve body, the piston valve body divides an inner cavity of the hydraulic cylinder into an upper oil cavity and a lower oil cavity, the piston rod is provided with a throttling channel, and a throttling rod axially slides on the piston rod. A pre-tightening spring is arranged between the throttling rod and the throttling channel, the hydraulic damping adjusting device comprises a hydraulic adjusting end cover, an adjusting cavity is formed in the hydraulic adjusting end cover, and the adjusting cavity and the throttling rod are matched with a hydraulic push rod on the hydraulic adjusting end cover through a plunger to be in transmission connection. According to the utility model, the throttle lever is driven to axially move in a hydraulic mode so as to adjust the flow area of the throttle channel and realize the damping force adjustment of oil flowing, so that the problems of time and labor waste and low adjustment efficiency caused by mechanical transmission matched adjustment are avoided, and meanwhile, the problem of leakage of damping oil in the prior art is effectively solved.

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.

A fluid delivery manifold for use with a fluid delivery system includes a fluid passageway and at least one integrated valve, each with a plunger housing having an air chamber. The air chamber and the fluid passageway are non-fluidly coupled relative to each other. A valve plunger in the plunger housing blocks a valve orifice of the fluid outlet in a closed position to prevent passage of fluid, and opens to permit fluid to pass from a fluid inlet of the passageway through the valve orifice for dispensing from a fluid outlet. An actuator assembly coupled to each integrated valve includes an actuator configured to adjust a position of a valve limiter to adjustably control an effective valve orifice area of the valve orifice based on a distance of movement of the valve plunger to the open position.

A fluid delivery system for dispensing fluid in a vehicle wash includes at least one integrated valve, each with a plunger housing having an air chamber configured to receive a valve limiter. A valve plunger in the plunger housing has open and closed positions, and blocks a valve orifice when closed, and permits the passage of fluid through the valve orifice for dispensing from a fluid outlet when opened. An actuator assembly is coupled to each integrated valve, and each includes an actuator and the valve limiter. A control system is communicatively coupled to each actuator and is configured to receive a selection corresponding to a selected outlet pressure and based on the selection, causes the actuator assembly to adjust a position of the valve limiter to reach a target flow rate or a target outlet pressure of the motive fluid when the valve plunger is in the open position.

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.

An automatic door opener, more particularly for use in a motor vehicle, has a housing, a plunger mounted to be longitudinally movable in the housing, and an electric plunger drive that is designed to move the plunger forward and back between a resting position, in which it is withdrawn into the housing, and an actuation position, in which it protrudes out of the housing. In addition to the electric plunger drive, a mechanical auxiliary drive, is provided that is designed, in the event of actuation, to be able to move the plunger from the resting position to the actuation position.

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.

Provided herein is a blood draw syringe connectable to a vascular access device for performing a blood draw. The blood draw syringe includes a syringe barrel and a plunger assembly. The plunger assembly includes a plunger rod and a stopper positioned at the distal end of the plunger rod, with the plunger assembly moveable within the syringe barrel to move the stopper between a starting position and a stop position, with a first volume provided in the chamber with the stopper at the starting position and a second volume provided in the chamber with the stopper at the stop position. The syringe is configured to enable pre-setting of the plunger assembly within the syringe barrel prior to a blood draw, with the stopper being positioned at the starting to provide a first volume that limits a maximum vacuum pressure in the syringe barrel during the blood draw.

The utility model relates to the technical field of electro-tricycle braking, in particular to a linkage braking assembly and an electro-tricycle. The linkage brake assembly comprises a linkage valve, the linkage valve comprises a valve body, a first elastic piece and a transmission structure, the valve body is provided with a first containing cavity used for containing hydraulic oil, and a plunger structure is connected into the first containing cavity in a sliding mode. According to the utility model, by treading the pedal plate, the pedal plate drives the plunger structure to move through the transmission structure, and hydraulic oil in the first chamber is extruded to finish pressure buildup from the first oil outlet pump to the oil path input port of the front disc brake; the hydraulic oil in the second cavity is extruded to complete pressure buildup from the second oil outlet pump to the oil way input port of the rear drum brake, due to the arrangement of the first sealing structure and the second sealing structure, the first cavity and the second cavity are not communicated with each other, even if pressure buildup of one oil way fails, operation of the other oil ways cannot be affected, and the service life of the rear drum brake is prolonged. And the safety is higher.

A buckle according to the present invention has two opposing ends that are removably attached to each other using a locking system. On one end of the buckle, the locking system includes two opposing locking pins coupled to a spring that is fully enclosed and protected from external elements. On the other end, corresponding rivets or pin casings with plungers are operable to receive the locking pins and lock the two ends together or push the pins out of the casings to release the buckle. The buckle may also include a plug that is removably attached to the adjustable loop end and allows the central bar of the adjustable loop end to be removed without deforming the central bar. Alternatively, each end of the buckle may include self-aligning tabs that guide the ends of the buckle for fastening and aid in the stability of the buckle.

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.