46results about "Trunk pistons" patented technology

This invention discloses a hydraulic piston for an air booster pump, relating to the technical field of hydraulic pistons for air booster pumps. It includes a push rod, one end of which has a positioning insert that can pass through a brake piston, and the other end is a connecting end that connects to an air chamber piston. A sealing gasket is provided between the brake piston and the push rod for sealing connection. The diameter of the free end of the sealing gasket is smaller than the diameter of the contact surface of the push rod. This application eliminates the push rod seat connecting the brake piston and the push rod in conventional air booster pumps, ensuring braking sensitivity and thus increasing safety. This application achieves rapid and sensitive response by directly connecting the brake piston and the push rod, improving braking safety and saving braking reaction time.

A finishing device, comprising a thrust system (101), a sealing system (102), a conveying pipe system (103), and a recovery system (104), wherein the sealing system (102) comprises a piston (21) and a cylinder body (18) cooperating with the piston (21); the cylinder body (18) is used for accommodating a finishing medium (8) for performing finishing processing; the conveying pipe system (103) conveys the finishing medium (8) to a port of an inner-flow-channel workpiece (34); the recovery system (104) comprises a recovery container (35), a recovery pipe (36), a return pipe (37), a power assembly (130), and a control valve assembly (140); the control valve assembly (140) comprises a first valve (38) and a second valve (39); the recovery container (35) is in communication with the inner-flow-channel workpiece (34) by means of the recovery pipe (36), and is in communication with the sealing system (102) by means of the return pipe (37); the first valve (38) cooperates with the sealing system (102) and a low-pressure environment; the second valve (39) is located at the return pipe (37) and cooperates with the recovery container (35) and the sealing system (102); and the power assembly (130) is in communication with the recovery container (35). By means of the cooperation of all parts, rapid supplementation of the finishing medium of the sealing system is realized, ensuring the efficiency of finishing processing. Further provided is a finishing method.

The invention relates to a piston pin comprising a tubular body made of an iron-based sintered alloy; wherein the piston pin is mounted to penetrate an upper end of a connecting rod and a piston; and wherein the center of gravity of the piston pin is eccentric in the circumferential direction.

The utility model relates to the field of hydraulic and pneumatic technology provides a kind of double-out piston rod structure, comprising: cylinder body;Two connecting seats are set on the surface of the symmetric end of the cylinder body;Further comprising: two chutes are opened in the symmetric place of the cylinder body inner wall;Piston assembly is movably arranged in the inside of the cylinder body, and piston assembly includes: two piston bodies.The utility model discloses when hydraulic or pneumatic medium enters from oil inlet, the clamping groove on the surface of piston body is moved along the surface of chute in the inside of cylinder body, and cooperation positioning pin is embedded in the inside of positioning hole, and the installation part is positioned and installed by clamping groove, so that piston rod body moves in one direction, simultaneously, the medium is discharged from oil return port on the other side, so that piston rod body keeps synchronous output force and stroke, changes oil inlet direction to realize reverse movement of piston rod body, to realize the function of bidirectional drive, synchronous output.

The present invention relates to a reservoir piston arrangement (10) according to the features of claim 1. A reservoir piston arrangement (10) is a pressure medium reservoir of an electronically slip-controllable vehicle brake system, which is used for intermediate storage of pressure medium released from wheel brakes within the context of brake pressure control. In particular in electrically powered vehicles, such a pressure medium reservoir is used for each braking process. In this case, a reaction pressure as low as possible of this pressure medium reservoir is particularly important, since this promotes the efficiency of the recuperation of braking energy, reduces friction between the reservoir piston arrangement (10) and the associated receiving parts, and minimizes wear on the guides and / or seals of the reservoir piston. For this purpose, a reservoir piston arrangement (10) is proposed which has a reservoir piston (12) with a first guide ring (14a) on a first circumference of a first skirt section (18a), which surrounds the piston skirt (18) and projects radially above a second skirt section (18b) of the piston skirt (18) which is larger in terms of its outer dimensions.

The present invention relates to a gap seal device comprising a housing (2) having a guide chamber (22) filled with a fluid, and a multi-component piston (3) that is moved translationally and / or rotationally within the guide chamber (22), the piston (3) separating a high-pressure region (23) from a low-pressure region (24) of the guide chamber (22), the piston (3) forming an annular gap (9) with an inner wall (25) that bounds the guide chamber (22) and has a nominal gap width (S0). The piston (3) comprises a stepped rod (4), a sleeve (5) sliding on the stepped reduced diameter region (42) of the rod (4) and having a blind hole (54), and a coupling portion (7), wherein at least one stiffness change portion (43, 56) is provided in the stepped reduced diameter region (42) of the rod (4) or in the tubular portion (52) of the sleeve (5), and a gap width (SV) of the annular gap (9) smaller than the nominal gap width (S0) is set in the radial region of the stiffness change portion (43, 56) as a function of a set stress (F) due to stress-induced expansion in the outer diameter direction of the tubular portion (52) of the sleeve (5).

A trigger dispensing head of a trigger dispensing device is provided. The trigger dispensing head has a cylinder chamber, a piston, a pressure chamber, a sleeve having an end wall, a suction duct terminating in a suction mouth, a dispensing duct, and valve members for regulating flow of a product. The valve members have a valve element made in one piece. The valve element has a tubular portion, a flexible flap, and an annular membrane.

The invention relates to a piston (10) for a fluid pump, the piston being indended for securing to a first end (21) of a drive piston (20) which can be moved back and forth linearly along a stroke direction (x) in a cylinder chamber (200) of the fluid pump, the first end (21) of the drive piston having a disc-shaped end portion (22) which is oriented perpendicularly to the stroke direction (x), and the piston (10) comprising: a substantially pot-shaped piston cap (30) which can be placed on the end portion (22) of the drive piston (20) from a first side (23) of the disc-shaped end portion and which is designed to delimit a working space (202) between the piston (10) and the cylinder chamber (200) in the stroke direction (x); a substantially sleeve-shaped cylindrical nut (40) which is designed to receive at least part of the drive piston (20) along the stroke direction (x) and to contact the disc-shaped end portion (22) from a second side (24) of the disc-shaped end portion (22), the second side lying opposite the first side (23); and a substantially sleeve-shaped ring nut (50) which is designed to hold the piston cap (30) and the cylindrical nut (40) at a defined axial distance to one another along the stroke direction (x).

This utility model relates to the field of rubber piston technology, specifically to a fabric-reinforced rubber piston suitable for high-pressure environments. It includes a piston body with a spiral cooling channel inside, extending spirally along the piston axis. A metal heat-conducting pipe is embedded within the spiral cooling channel, with both ends extending to the piston end face to form a cooling medium interface. This cooling medium interface connects to an external circulation system, allowing the cooling medium to flow through the heat-conducting pipe and achieve forced heat dissipation from the piston. By setting a spiral cooling channel within the piston body and embedding a metal heat-conducting pipe to connect to an external circulation system, forced circulation cooling of the piston is achieved. The spiral cooling channel design extends the coolant flow path, improves cooling uniformity, and avoids rubber aging caused by localized overheating.

A proportional volumetric dosing unit (1) is described comprising a pump (25) provided with a piston (235) adapted to supply an auxiliary fluid to a motor (20) of the proportional volumetric dosing unit itself, which moves the piston (235) of the pump and is fluidly connected to an inlet conduit (10) of a main fluid and an outlet conduit (15) of a mixed fluid, said motor comprising a piston (30) slidably housed in a cylinder (100) of the motor and connected to the piston (235) of the pump to move it, wherein the piston (30) comprises an annular sealing lip (80) protruding from a top (55) of the piston (30), and an end portion thereof distal from the top of the piston is applied in contact to the cylinder (100) making a fluid seal, said proportional volumetric dosing unit being characterized in that it comprises an elastic element (130) which pushes the annular sealing lip (80) against the cylinder (100).

Passenger restraint systems are provided. The restraint systems can include: a passenger seat supported by a frame; a restraint bar pivotably attached to the frame; and at least one piston operably engaged between the restraint bar and the frame. Restraint system pistons are provided. The pistons can include: a central chamber housing a piston head and rod; a fluid reservoir in fluid communication with the central chamber; and at least one electromechanical valve operable between an open and a closed position. Methods for restraining a passenger within a seat are also provided.Manually operable piston assemblies are provided that can include a piston head within a cylinder, the piston head separating fluid in the cylinder to define rod-side fluid and head-side fluid. The piston assembly can be configured to operate in at least six positions, including but not limited to a first position of locking retract static; a second position of locking retract extend flow; a third position of locking retract flow; a fourth position of locking extend static; a fifth position of locking extend retract flow; and a sixth position of locking extend flow. Manually operable piston assemblies are also provided that can include a piston head within a cylinder, with the piston head separating fluid in the cylinder to define rod-side fluid and head-side fluid. The manually operable piston assembly can further be configured to operate in at least six positions that include a first position of locking extend static; a second position of extend movement flow; a third position of manual override retract flow; a fourth position of manual override extend flow; a fifth position of locking retract static; and a sixth position of retract movement flow.Methods for operating a manually operable piston are also provided. The methods can include applying pressure to retract the piston rod and allow head-side fluid to pass through piston head passageway and mix with rod-side fluid. Methods for operating a manually operable piston can also include applying pressure to extend or retract the piston rod and allow head-side fluid to pass through at least one valve and mix with rod-side fluid.

To provide a surface coating layer formation method and a method for manufacturing a gasket which can reduce falling of insoluble fine particles into a chemical liquid while maintaining stable slidability while preventing leakage of a liquid agent.SOLUTION: A surface coating layer formation method has: a coating step of coating a material on a surface layer having such a composition that silicon-based rubber particles are contained in a silicon-based solution (Investigation number 1 (blending 1)) onto the surface of a base material with a predetermined coating film thickness; a drying step of drying a sliding member after coating at a first temperature for first time; a baking step of baking the sliding member after drying at a second temperature for second time; and a cleaning step of extracting and cleaning the sliding member after baking at a third temperature for third time.SELECTED DRAWING: Figure 4

The utility model discloses a piston anti-fouling, anti-impurity and anti-garland structure for a hydraulic breaking hammer, and relates to the technical field of hydraulic breaking hammers. A whole circle of axial protrusions are arranged on the outer circle of the striking end face of the piston to form a retaining wall, and the protrusions are higher than a striking face and used for surrounding the striking face when the piston hammers a drill rod, enabling splash generated by collision to splash towards the drill rod, preventing the splash generated by collision from splashing towards the cylindrical face of the piston and reducing attachment of impurities on the cylindrical face of the piston. The middle cylinder is provided with an oil supply channel and an oil return channel, and the inner wall of the middle cylinder is provided with an oil supply oil groove, a spiral oil groove, an injection oil groove, a step and an oil return oil groove; pressure difference exists between the injection oil groove and the oil return oil groove, the flow speed of hydraulic oil is increased to form jet flow when the hydraulic oil passes through a narrow slit formed by the step and the piston, and the jet flow is used for flushing the piston surface when the piston moves. By optimizing the striking end face structure of the piston and the oil groove design of the inner wall of the middle cylinder, impurities attached to the piston are effectively reduced, the cylinder scoring risk is reduced, meanwhile, the cleanliness of hydraulic oil is improved, the service life of equipment is prolonged, and efficient and stable operation of the hydraulic breaking hammer is guaranteed.

A piston for a compressor comprises a piston rod which defines a longitudinal axis, and a piston ring package with a carrier sleeve which extends along the longitudinal axis, is arranged on a circumferential surface of the piston rod and is releasably fastened to the piston rod, and a plurality of piston ring devices arranged next to one another along the longitudinal axis, which are arranged on an outer circumferential surface of the carrier sleeve and are fastened to the carrier sleeve, the carrier sleeve preferably having a mechanical interface for attaching a withdrawal tool for applying a force directed along the longitudinal axis.

Hydraulic pistons are used in a wide variety of applications. For instance, hydraulic pistons are commonly used to actuate clutch plates in transmissions of vehicles. The hydraulic pistons in transmissions need to engage and disengage from the clutch plates in a consistent and timely manner. Failure to do so may lead to poor performance or even damage. Thus, there is a need for improvement in this field.

This utility model relates to the field of valve component technology, and in particular to a split-type piston and an angle seat valve actuator having the same. The split-type piston includes: a first piston with a through hole at its geometric center; and a second piston with a through hole at its geometric center. The through hole is used to accommodate a piston rod. The inner diameter of the first piston is larger than the outer diameter of the second piston, so that the first piston covers the outer bottom of the second piston. This utility model, through its split-type piston structure with through holes at the geometric centers of both the first and second pistons, facilitates the accommodation of the piston rod. Compared with existing technologies, it avoids the problems of material waste, die-casting shrinkage cavities, and uneven wall thickness that exist in the bar processing or die-casting of directly integrated pistons, thus improving the stability of the equipment.

A piston head assembly includes a piston head including an upper portion and a lower portion. The upper portion includes an outer wall and an inner wall disposed radially inward of the outer wall. A cooling gallery is at least partially defined between the outer wall and the inner wall. The extends downward from the upper portion. The lower portion includes an upper surface and a skirt extending from the upper surface. The skirt defines a pin bore centered around a pin bore center axis. A portion of the skirt between the pin bore center axis and a skirt reference axis has a curved vertical profile. The skirt reference axis intersects the pin bore center axis. The piston head assembly includes a plurality of lock plates coupled to the upper portion. Each lock plate extends between the outer wall and the inner wall.

A piston compressor (38) comprises a drive piston (3) guided along a cylinder axis (36) in a drive cylinder (24) and a compressor piston (2) guided along the cylinder axis (36) in a compressor cylinder (1) coaxial with the compressor cylinder (1). The first inner diameter of the drive cylinder (24) is at least twice the size of the second inner diameter of the compressor cylinder (1), and the compressor piston (2) is supported on the drive piston (3) by a piston rod (37). For this purpose, a drive piston flange (41) is formed on one end face of the drive piston (3), and a piston rod flange (42) is formed on the opposite end face of the piston rod (37).Within the drive piston flange (41), a recess (43) is formed in the end face of the drive piston (3), into which a projection of the piston rod (37) extends beyond the piston rod flange (42). The drive piston flange (41) and the piston rod flange (42) are enclosed by an elastic clamp (17) and are pressed against each other along the cylinder axis (36). A support surface (44) extends across the bottom of the recess (43), oriented transversely to the cylinder axis (36). The projection extends into the recess (43) with radial clearance (35) and rests against the support surface (44) with a convex counter-surface (45). The drive piston flange (41) and the piston rod flange (42) are positioned opposite each other along the cylinder axis (36) at a free distance (34).This allows both translational relative movements between the flanges (41, 42) running transversely to the cylinder axis (36) and rotational relative movements around the contact area between the support surface (44) and the counter surface (45).

The utility model discloses a kind of piston connecting structures for oil cylinder, including cylinder body and the piston rod placed in cylinder body, piston is equipped on piston rod, cylinder body right end is equipped with end cover;One end is equipped with fixed column on piston rod, fixed column is equipped with piston, the diameter of fixed column is less than the diameter of piston rod;Baffle is equipped on piston rod at the junction of fixed column and piston rod;T type sleeve is equipped on the right side of piston, T type sleeve is sleeve and bottom plate composition;Bottom plate and piston end face are fixedly connected by bolt, external thread is equipped on fixed column, sleeve is rotatably connected with fixed column by thread. The utility model can effectively fix piston by T type sleeve, and simultaneously, piston can be driven out by rotating T type sleeve, to avoid disassembling piston rod to improve replacement efficiency.

2. Coating for technical components, such as piston rods (22) of hydraulic or pneumatic working cylinders, which have at least on their upper surface (56) a steel material which is at least partially covered with at least one layer (62), characterized in that at least one outermost layer (64) is ceramic-free and glossless, preferably black.

A plunger configured as described herein provides geometry optimizations to minimize friction magnitude and variability during use by maintaining low deformation under large extrusion forces. More specifically, plunger embodiments described herein minimize a contact area between the plunger and a syringe or chamber, while also maintaining high contract pressures to maintain container closure integrity. Moreover, the plunger embodiments are configured to have minimal or no increase in the contact area under high loads associated with the delivery of viscous products.

The invention relates to an axial piston machine, in which pistons perform a stroke movement in a cylinder block, and in which the pistons have a seal ring carrier for the seal rings. In order to improve the robustness, wear resistance, friction and stick-slip, according to the invention the seal rings are spherical, wherein the radius of curvature of the seal rings, which are configured in a spherical manner in the region, essentially corresponds to half the diameter of the inner wall of the cylinder block.

The utility model discloses a kind of high-security cloth clamping piston heads, it is related to piston head protection technical field, including piston head main part, piston head main part outer side wall is fixedly provided with sealing ring, sealing ring is located annular inner cavity and is provided with protection mechanism, protection mechanism includes annular elastomer, annular elastomer is arranged in annular inner cavity and with annular inner cavity top wall and bottom wall abut, two buffer cavities are opened in annular elastomer inside, two buffer cavities are all provided with spring, sealing ring is located annular inner cavity and is provided with first compression ring and second compression ring.Annular elastomer generates deformation and then buffer pressure, annular elastomer is driven to buffer and reset by the elastic force effect of spring, and then improve the compression resistance of sealing ring, first compression ring and second compression ring resist tension, and then improve the tensile resistance of sealing ring, effectively avoid sealing ring to be deformed or damaged by tension, effectively avoid the sealing performance of piston head main part to be worse.

The utility model discloses a kind of split type pistons for RTM injection machine, belong to composite material production technical field, including piston main body and sealing ring, the number of sealing ring is N, the piston main body includes N+1 split units arranged along axial direction, each the split unit is detachably connected through connecting piece, and there is sealing groove matched with the sealing ring between the adjacent two split units. The utility model does not need to force installation by means of auxiliary tool when assembling sealing ring, ensures that sealing ring is not damaged, and then ensure that piston and cylinder body have good sealing property.

The utility model provides a kind of split piston and shock absorber, belong to chassis technical field, including cylinder and inner core, the inner cavity of cylinder is provided with stop ring in circumference, the upper portion of stop ring forms the connecting chamber for detachably connecting solenoid valve, the lower portion of stop ring forms assembly chamber;Inner core is installed in assembly chamber with radial interference, the lower end of cylinder forms the press-in edge that bends inward, and press-in edge is used to press-in inner core in the lower end surface of stop ring.The utility model provides a kind of split piston, by axial limit and radial fixed structure, ensure the stability and reliability of split piston in working process, effectively promote operating precision, give full play to performance advantage, avoid equipment failure caused by inner core movement or excursion.

This utility model discloses a detachable bearing steel sleeve aluminum alloy composite brake piston for mining trucks. It includes a combined piston, a piston cap, an O-ring, and a brake bracket. The piston cap is located on the outside of the combined piston; the brake bracket is located on the outside of the piston cap; the combined piston includes an aluminum alloy piston body; a bearing steel sleeve is located on the outside of the aluminum alloy piston body; a heat insulation pad is located at one end of the aluminum alloy piston body; a countersunk screw is located inside the heat insulation pad; and a threaded sleeve is located outside the countersunk screw. This utility model achieves a synergistic effect of "lightweight substrate + high-strength wear-resistant functional layer" through the composite structure of the aluminum alloy piston body and the bearing steel sleeve, improving the reliability and service life of the braking system. The replaceable sleeve structure solves the problem of complete piston scrapping after wear, improving the economic efficiency of application.

To provide a piston manufacturing method capable of mass manufacturing pistons whose space parts are filled with particles and which have an aggregation restraining structure.SOLUTION: In a piston manufacturing method, first plural blocks 101-114 having a three-dimensional shape made by solidifying a mixture of water and a particulate matter and having grooves 121-123 concaved on sides are prepared. The plural blocks 101-114 are overlaid on each other, so as to prepare a core 100 having a first through hole 131, a second through hole 132 and a third through hole 133. The core 100 is arranged inside a cavity and clamped. Molten metal is injected in the cavity and the first through hole 131, the second through hole 132 and the third through hole 133 of the core 100. By solidifying the molten metal, a piston body 20 having the space part 30 is formed. At the same time, a first beam member 51, a second beam member 52 and a column member 52 are formed. Finally, water is discharged from the space part 30 of the piston body 20.SELECTED DRAWING: Figure 7