1114 results about "Washer" patented technology

This utility model discloses a bidirectional self-locking motor for a height-adjustable desk, including a front cover (1) and a rear cover (2). A stator (3) is provided between the front cover (1) and the rear cover (2). Multiple coils (4) are provided in the stator (3). A rotor (5) is provided inside the stator (3). Multiple permanent magnets (6) are provided on the outside of the rotor (5). A rotating shaft (7) is provided on the axis of the rotor (5). A first ball bearing (8) is provided between the rotating shaft (7) and the rear cover (2). A spring washer (9) and a friction plate (10) are provided in sequence on the rear side of the first ball bearing (8). A screw (11) is provided on the rear side of the friction plate (10). A screw groove is opened at the front end of the rotating shaft (7) to form a worm (12). A worm wheel (13) is provided on one side of the worm (12). The worm wheel (13) is connected to the front cover (1) through a bracket (14). This utility model has the advantages of convenient installation, low failure rate, low noise, and bidirectional self-locking function.

A pull-rivet assembly, a product, a product assembly, and a product installation method are disclosed. The pull-rivet assembly includes a pull-rivet nut including a locating end, a bolt threadedly connected to the pull-rivet nut, and a washer sleeved on the locating end of the pull-rivet nut. The washer engages the locating end of the pull-rivet nut so that the pull-rivet nut cannot rotate relative to the washer, and the washer is adapted to engage a sleeve of a pull-rivet tool to prevent the pull-rivet nut from rotating when being pulled by the pull-rivet tool. In the present invention, the pull-rivet nut is riveted to a second component and the first component is fastened to the second component by tightening the bolt. Moreover, the pull-rivet nut does not rotate during the tightening of the bolt. The present invention simplifies the installation step of fastening the first component to the second component and reduces the cost.

This utility model discloses a glass grinding device for liquid crystal display substrates, relating to the field of glass processing technology. The device includes a main body and a motor. Its features include: a first wheel connected to the motor output end, and a second wheel connected to the top of the first wheel; positioning rods and positioning holes are provided on both sides of the bottom of the second wheel and both sides of the top of the first wheel; a support ring connects the first and second wheels, and abrasive is fixed to the outer ring of the support ring. Through the arrangement of the first wheel, second wheel, support ring, abrasive, limiting bolt, and anti-loosening washer, when the abrasive is severely worn and can no longer be used, the limiting bolt, anti-loosening washer, and second wheel can be disassembled sequentially, thereby ending the limiting of the support ring. Subsequently, the support ring and abrasive can be disassembled and replaced together. Compared to replacing the entire grinding wheel, this method uses less material, reducing replacement costs. Furthermore, the support ring can be separated by magnetic separation during recycling, improving recycling efficiency.

This invention discloses a filter batch testing fixture based on omnidirectional soft positioning, belonging to the field of filter manufacturing technology. The filter housing has outwardly protruding mounting ears at both ends of its bottom. The filter batch testing fixture includes a base plate, a middle plate, a top plate, a first soft pad, a second soft pad, and soft washers. The base plate has multiple filter mounting positions, with multiple first soft pads placed on top of these positions. Each first soft pad has a second soft pad positioned above both ends. The middle plate has an annular mounting groove, with multiple soft washers placed within it. The top plate has an annular protrusion at its bottom, with the lower parts of the protrusions placed within the annular mounting grooves and pressing down on the corresponding soft washers. This invention achieves omnidirectional soft positioning of the filter in both vertical and circumferential directions, avoiding damage to the filter surface coating, improving product aesthetics and yield, and simultaneously increasing assembly and disassembly efficiency.

This invention discloses a multi-station tooling, belonging to the field of machining tooling and fixture technology. The tooling includes a base, a single cylinder, a movable arm, multiple clamping modules, spherical washers, and limiting components. The single cylinder drives the movable arm to perform overall linear translation. The movable arm has multiple spherical grooves, and each pull core forms a spherical adaptive fit pair with the spherical grooves through the spherical washers. The clamping modules are configured as interchangeable inner support modules or outer clamping modules, allowing switching of working modes on the same base by changing the pull cores and elastic chucks. The spherical adaptive fit pair between the spherical washers and spherical grooves automatically compensates for axial eccentricity and angular errors caused by the interchangeability of the inner support modules and outer clamping modules and assembly deviations. This invention achieves unified high-precision synchronous clamping at multiple stations with a single cylinder and rapid switching between inner support / outer clamping, significantly improving clamping force consistency, machining yield, and changeover efficiency.

This utility model belongs to the field of pre-embedded bolt anti-loosening technology, and discloses a pre-embedded bolt anti-loosening structure for metal products. It includes a nut rotatably mounted on the lower outer side of the bolt body, grooves on both sides of the nut, a cotter pin fitted inside the grooves and inserted into the bolt body, a locking washer fixed to the upper surface of the nut, and a shape memory alloy spring washer fixed to the lower surface of the nut. Through the cotter pin, shape memory alloy spring washer, and locking washer, the cotter pin prevents relative rotation of the bolt, nut, and other connecting parts under vibration or external force, ensuring a stable and safe connection. The shape memory alloy spring washer can increase the pressure at the connection point, reduce contact resistance, and suppress heat generation by deforming under temperature changes and other environmental conditions. It can also absorb some energy to reduce vibration amplitude and ensure connection stability. The locking washer restricts the rotation of the nut and bolt.

The utility model discloses a connector waterproof panel adopting PCB switching, including panel body, sealing washer, connection module and sealant, the inside and outside lateral surface of panel body is formed with mounting hole, the connection module is placed in mounting hole, and the connection module includes PCB, first connector, second connector and baffle, through by the connection module of PCB, first connector, second connector and baffle, place connection module in mounting hole, and cooperate in mounting hole and fill and solidify into sealant, to seal waterproof installation hole, place sealing washer on the inside lateral surface of panel body simultaneously, to seal installation with the chassis panel, thereby make the product cooperate after the chassis, can prevent cooling medium leakage, and the sealing waterproof effect is very good, and because the inside and outside connection adopts first connector and second connector respectively and connects, can realize the quick butt joint of the inside and outside connector of chassis, and bring the convenience for use.

This utility model discloses a nylon pipe socket connection structure, which includes a connecting sleeve. Extension plates are fixedly connected to both sides of the connecting sleeve. A first groove is fitted into the surface of each extension plate, located inside the groove. A filter plate is fixedly connected inside the groove. A clamping screw is threadedly connected to the inside of the extension plate, and one end of the clamping screw is connected to a clamping plate via a rotating shaft. This nylon pipe socket connection structure, by fitting a filter plate onto the surface of the extension rod, can filter impurities from the liquid. The clamping plate can also be adjusted via the clamping screw, thus adapting to and clamping connecting pipes of various sizes and preventing the pipe from detaching from the connection port. Simultaneously, a reinforcing rod is fixed to the outer wall of the connecting sleeve for protection, and multiple washers are fixed to both sides of the reinforcing rod via fixing screws, thereby preventing excessive water overflow.

The utility model relates to aluminium product processing technical field, and disclose a kind of flow guide mechanism of soaking furnace, comprising: furnace body, the inside of furnace body is equipped with for the guiding component of air guidance, guiding component includes guide plate and connecting seat, guide plate is rotatably connected with connecting seat;First adjusting component, setting in furnace body inner wall is used to adjust the installation height of guide plate;Second adjusting component, setting in connecting seat one side is used to adjust the angle of guide plate, by loosening the nut above or below sliding seat, sliding seat is moved along the radial direction of guide rod, when guide plate reaches specified position, two nuts can be tightened, the height of connecting seat is locked by two nuts and spring washer clamping limit connection, then the height of connecting seat installed is locked and fixed, it is adjusted according to the stacking of aluminium material, so that guide plate can be accurately wind-guided between aluminium material gap, and the overall structure is simplified, and the use and maintenance cost are low.

This utility model relates to the technical field of dust removal devices, specifically disclosing a high-efficiency dust removal device for green building construction. It includes: a movable base, a rotatable stabilizing frame mounted on the top of the movable base, a spray nozzle mounted above the stabilizing frame, a first annular groove at one end of the spray nozzle, a connecting cylinder threaded to the inner wall of the first annular groove, four connecting holes on the inner wall of a second annular groove, four insert rods fixedly connected to the surface of a buffer sleeve, four first buffer springs fixedly connected to the surface of the buffer sleeve, and a buffer washer threaded to the inner wall of a third annular groove. This utility model, through the combined use of the spray nozzle, buffer sleeve, buffer washer, buffer plate, protective frame, hydraulic telescopic rod, and stabilizing frame, enables the entire device to provide protection during use, especially protecting the atomizing nozzle from direct impact and ensuring stable dust removal operations.

The present invention relates to a valve including a hinge detachment prevention unit, the valve comprising: a hinge pin formed in a valve body and positioned in an accommodation space extending lengthwise in a first direction; a backflow prevention disk rotatably coupled to the hinge pin and positioned in a flow space communicating with the accommodation space; a plug positioned at one end of the hinge pin, with one portion thereof being positioned in the accommodation space and the other portion being positioned outside the accommodation space so as to prevent detachment of the hinge pin; a washer positioned on an outer circumferential surface of the hinge pin and having a coupling groove formed therein toward the hinge pin; and a detachment prevention unit that fixes the washer and the hinge pin together by engaging with the coupling groove to prevent the hinge pin from being detached from the accommodation space.

This invention provides a connection structure for air conditioning pipes, relating to the field of air conditioning pipe connections. It includes: a connecting pipe, a fixing plate, sealing washers, a connecting nut, a connecting platform, a connecting plate, an audible and visual alarm, and a fixing rod. The fixing plate is fixedly connected to the middle of the connecting pipe. The connecting nut is threadedly connected to the left and right sides of the connecting pipe. The sealing washers are located on the left and right sides of the connecting pipe. The connecting platform is fixedly connected to the outside of the connecting nut. The connecting plate is threadedly connected to the outside of the connecting platform. The audible and visual alarm is fixedly connected to the outside of the connecting plate. The fixing rod is fixedly connected to the middle of the connecting pipe. This invention avoids situations where the connection lengths of the copper pipes on both sides differ excessively, ensuring the tightness of the air conditioning pipe connection, improving the connection effect of the air conditioning pipe, and enhancing the usability of the connection structure. It solves the problem that existing connection structures easily affect the connection effect of air conditioning copper pipes and the usability of the connection structure itself.

The utility model relates to the technical field of bubble generator, and disclose a kind of suspended underwater micro-nano bubble generator, including adjustable support mechanism, bubble generating mechanism and external protection mechanism;Bubble generating mechanism is by multistage water pump, inlet pipe, one-way water inlet valve, connecting pump, transport pump, high-speed rotary cutting nanometer bubble pump, conveying pipe and aeration head etc., and is connected by thread seal sleeve to realize pipeline sealing connection.Mainframe box is equipped with buoy, internal and external pressure monitoring sensor, can realize underwater suspension and pressure real-time monitoring.Adjustable support mechanism can adjust equipment installation height, and external protection mechanism is realized waterproof anti-collision protection by protective shell, sealing washer and protective fence.The device adopts multistage water pump to match double high-speed rotary cutting nanometer bubble pump, can accurately control fluid flow rate and pressure, generates bubble particle size uniform, dissolved oxygen efficiency is high, with the characteristics of intelligent control, anticorrosive durable, protective, suitable for water purification, aquatic ecological restoration etc.

The utility model discloses an auxiliary positioning mechanism that workpiece is separated from cylinder body belongs to SLM selective laser sintering field, the utility model aims at solving in the metal printing post -processing, when taking out large -size cylinder body workpiece, because of the auxiliary equipment height and cost limit, need first cylinder body drop and turn out, again individually jacking workpiece to the workpiece position, but the cylinder body inner wall friction can cause its with jacking mechanism ascending after because dead weight back and fall, and then damage sealing washer and influence cylinder body and equipment precision, influence the problem of printing use, the utility model discloses a cylinder body, the cylinder body is the cylindrical structure of upper and lower opening, the both sides of cylinder body all movably connect with base, the inside of cylinder body is provided with workpiece platform, the below of workpiece platform is connected with piston plate, the piston plate is through the end face of sealing washer and base and is resisted, be provided with the stop pin on the base, one side of stop pin is connected with the pneumatic cylinder.

The utility model discloses a kind of small gas cylinder inflation welding sealing tool sealing washer structure, it is related to sealing technical field, solve the technical problem that the sealing effect between the poor existing technical scheme small gas cylinder inflation welding sealing tool and small gas cylinder, leading to serious gas leakage, small gas cylinder inflation weight is not easy to control;Including washer body, the washer body is ladder circular ring structure, washer body outer circle front end diameter is greater than washer body outer circle rear end diameter, washer body inner circle and located at the washer body rear end are provided with arc fillet of section, the utility model improves the sealing degree between "small gas cylinder inflation welding sealing tool" and small gas cylinder, when actual inflation operation, no gas leakage occurs, so that small gas cylinder inflation weight is controllable;Solve the problem of poor sealing effect between the existing small gas cylinder inflation welding sealing tool and small gas cylinder, reduce the security risk and resource waste brought by gas leakage.

The utility model discloses a fastening structure of copper clad aluminum material in the technical field of fastener, including bolt and setting first conical washer, conical pipe, second conical washer and nut on bolt in assembly direction in proper order, the head of bolt and first conical washer are located one end of copper clad aluminum material, second conical washer and nut are located the other end of copper clad aluminum material, and conical pipe is located inside copper clad aluminum material. This fastening structure adopts the symmetrical structure of "bolt + conical washer + conical pipe + conical washer + nut", and through conical pipe and upper and lower conical washer constitutes clearance compensation unit, when aluminum matrix produces plastic deformation because of high temperature, conical pipe fills the clearance through axial slight expansion, and lower conical washer taper surface self -locking effect locks residual pre -tightening force simultaneously, forms the closed -loop control of deformation -compensation -locking, realizes stress self -adaptive adjustment through the geometric adaptation of rigid taper surface, and it has good application prospect in the fastening of copper clad aluminum material.

This utility model relates to the field of anti-sludge base technology and discloses a CFD anti-sludge base with a shock-absorbing structure, including a sewage pump body. A support mechanism is provided at the bottom of the sewage pump body, and a fixing mechanism is provided on the outside of the support mechanism. The support mechanism includes a base assembly and a support assembly. The base assembly is located at the bottom of the sewage pump body, and the support assembly is located within the inner ring of the base assembly. This CFD anti-sludge base with a shock-absorbing structure, through the provided support mechanism, uses a support ring to support the sewage pump body via a rubber gasket and a retainer. When the retainer is subjected to force, it compresses the rubber gasket downwards, causing deformation and improving the fit between the retainer and the rubber gasket. This enhances the stability of the sewage pump body after it is fixed within the conical base. The flexible connection between the rubber gasket and the retainer, by improving the fit after fixing, avoids gaps and indirectly achieves a shock-absorbing effect.

The present disclosure relates to a grommet for mounting in an opening of a panel or similar structure. The grommet includes a main body that defines a central passage and one or more flexible retaining arms arranged along an outer wall of the main body. The retaining arms are configured to flex during installation and engage the surrounding structure to hold the grommet in place. A sealing material is provided between the retaining arms and the main body to close gaps while still allowing the arms to flex as needed. This arrangement provides improved resistance to rotation after installation and helps maintain effective sealing between the interior and exterior of the grommet, reducing the likelihood of fluid, dust, or air passing through the mounted opening.

The utility model relates to the technical field of alkaline water hydrogen production electrolytic cell, specifically to a kind of alkaline water hydrogen production electrolytic cell with cooling device, including the end pole plate of alkaline water hydrogen production electrolytic cell, cooling cavity being arranged in the inside of end pole plate, the cooling cavity in the inside of end pole plate is connected with circulating cooling system;Further improved scheme also includes in the inside cooling cavity being connected with circulating cooling system in intermediate pole plate is set to the scheme of the utility model can reduce the temperature of end pole plate and intermediate pole plate place sealing washer, to improve the compression strength of this sealing washer, solve end pole plate and intermediate pole plate place sealing washer more easily failure, damage problem, improve the working reliability of alkaline water hydrogen production electrolytic cell, and effectively prolong the service life of alkaline water hydrogen production electrolytic cell.

The utility model discloses a battery top cover structure of repeated liquid injection, including top cover sheet and install in the middle part of top cover sheet's explosion -proof subassembly, the positive pole and negative pole of the both sides of upper end face, the stop frame of bottom end, the positive pole and negative pole are respectively equipped with sealing washer and install after the stop frame on top cover sheet, and the center of positive pole has the through type injection channel that sets up along its axial direction, the upper portion of injection channel is equipped with rubber plug, and the top of rubber plug covers and welds the injection hole welding piece, and the middle part of injection hole welding piece has the through -hole that supplies injection needle to pass, and welds to the corresponding position department of top cover sheet. Thus, by the synergetic design of the injection channel of positive pole center, rubber plug and injection hole welding piece, after the injection of injection needle puncture, rubber plug restores the seal automatically, need not additional complex sealing operation, can realize safe, convenient secondary and multiple liquid supplement, has solved the problem of traditional structure's repeated liquid supplement or the sealing failure problem after liquid supplement, prolongs the service life of battery.

The utility model discloses a portable replacement formula dissolved oxygen appearance probe structure, including equipment main part, the top of equipment main part is provided with connecting wire, and the one end fixedly connected with the mounting head of connecting wire relative equipment main part, the bottom of mounting head is provided with metal insert piece, and portable replacement formula dissolved oxygen appearance probe structure still includes the plug -in board, and the both sides of plug -in board are relatively arranged in the bottom of mounting head. In the above -mentioned scheme, the mounting head is inserted with the butt joint pipe, makes metal insert piece to be inserted into the insert piece groove, and the plug -in board of setting on the both sides of mounting head bottom enters the plug -in groove, the arc -shaped clamping block of plug -in board bottom setting contacts with the inner wall of plug -in groove and is extruded, and the spring of guiding column inside connection produces the deformation, and arc -shaped clamping block shrinks to the plug -in board simultaneously, makes the whole probe more simple and concise, and the top joint can integrate annular sealing ring, and when the buckle is closed, synchronous compression sealing washer no.

The utility model relates to a valve field technical field, a split type lock residue valve, including left valve body and right valve body, left valve body is connected through bolt and right valve body screw thread, left valve body upper end is fixedly connected with valve seat, the inner wall of valve seat is fixedly connected with sealing washer, the inner wall of sealing washer is fixedly connected with valve rod, the upper end of left valve body is connected with protection mechanism and is opened through the control aluminum alloy material's protection strip outside left valve body and right valve body, make the recess of protection strip inside will be caught on the bolt of left valve body and right valve body both ends, play the effect that protection strip protects outside, and protection cover will cover the lower end of arc -shaped seat again and protect, improve the corrosion intensity of installation position, make the stability and service life of whole valve.

This utility model relates to the technical field of washing machine components and discloses a high-efficiency sealing cover for a washing machine. It includes a bottom cover, a connecting shaft fixedly connected to the outer side of the bottom cover, and an upper sealing cover installed on the inner side of the connecting shaft. The connecting shaft and the upper sealing cover are rotatably connected via a rotating shaft. A sealing ring assembly is installed between the upper sealing cover and the bottom cover. The sealing ring assembly includes a lower washer and an upper washer, both made of rubber. The sealing ring assembly, consisting of a lower washer and an upper washer, is installed between the upper sealing cover and the bottom cover. This utility model utilizes the sealing ring assembly, composed of a lower washer and an upper washer. The washer teeth and grooves engage to form a multi-layer sealing structure, while simultaneously providing an interference fit with the annular groove of the bottom cover. Through compression deformation, it fills the gaps. Combined with the high elasticity of the silicone rubber material, it effectively prevents liquid leakage and improves the sealing performance during washing.

This utility model discloses a device for testing the riveting strength of eccentric bolts, including a universal testing machine, a base, and a sleeve. The base is placed on the testing platform of the universal testing machine. The base has a threaded hole at its central axis for screwing in the shank of the eccentric bolt. The sleeve has a through hole for the head of the eccentric bolt to pass through. A gap is left between the inner wall of the through hole and the outer wall of the head of the eccentric bolt. After the sleeve passes through the head of the eccentric bolt, it contacts the washer of the eccentric bolt and applies vertical pressure to the washer of the eccentric bolt under the action of the loading head of the universal testing machine. The advantages are that it can quickly and accurately measure the riveting strength of bolts, is easy to operate, and provides reliable test data.

The utility model discloses a water pipe connecting structure for water heater and water heater, it belongs to water heater technical field, water pipe connecting structure for water heater includes insulating base body and embedded part, and embedded part extends along the first axis, and at least part embedded part is embedded in the insulating base body and is connected as a whole with insulating base body, and the part of embedded part embedded in the insulating base body is provided with limiting recess, and at least two limiting recesses extend around the circumference of embedded part to form sealed groove, and at least two sealed grooves are provided with sealing washer in interference. The water heater includes an inner container, the inner container is provided with an inner container connector, and the inner container connector is connected with the water pipe connecting structure for water heater. At least two sealed grooves are provided with sealing washer in interference, realize multilayer protection, even if the gap between embedded part and insulating base body produces, sealing washer can play the sealing effect, prevent water leakage and prevent electric shock, guarantee use safety.

The utility model discloses a urine sample storage device for nephrology department relates to urine storage device technical field. Including: main body frame, the inner wall of main body frame is connected with bearing device, the outer wall of main body frame is connected with seal cover, storage device, the storage device includes storage frame, the outer wall of storage frame is rotatably connected with storage cover through the lug, the outer wall fixedly connected with buffer washer of storage frame, the outer wall fixedly connected with the clamping tongue of storage frame, the inner wall fixedly connected with the fixed plate of storage frame, the outer wall fixedly connected with the clamping ring of storage cover. The urine sample that needs to store is placed in the hole of fixed plate through storage device, so this can make sample place stability and orderly, then close storage cover, and the clamping ring will be locked into the clamping tongue when closing storage cover, thereby realizes the closed preservation to the sample in storage device.

The utility model discloses a vibration test module protection box, including box body, apron, limit stop, high hardness rubber pad, wedge locking strip, not to come out screw and wave circular washer. Box body and apron inboard are pasted with high hardness rubber pad, are used for buffering and isolating module and outside hard contact, avoid scratch and surface damage, limit stop sets up in box body lateral wall, is connected through not to come out screw and wave circular washer, possesses automatic release structure, and it is convenient for module dismounting, wedge locking strip installs in box body outside, is used for firmly locking protection box in vibration test fixture. The module protection box simple structure, the protection effect is remarkable, and the adaptability is strong, is applicable to the vibration test of various kinds of avionics module, can effectively promote module appearance quality grade and test pass rate, has good engineering application value.

The utility model discloses a sealed leak -proof cold shrink intermediate joint, it includes intermediate joint main part, and the both ends of intermediate joint main part are fixedly connected with sealing mechanism respectively, and the bottom fixedly connected with bandage of sealing mechanism, sealing mechanism is composed of rubber cover, sealing washer and support mechanism, and one end of rubber cover is fixedly connected with intermediate joint main part, sealing washer is fixedly connected in the inner wall of rubber cover, and support mechanism is located in rubber cover and opens up rubber cover, and bandage is fixedly connected in the bottom of rubber cover, and bandage is located in the side of sealing washer away from intermediate joint main part. Through support mechanism to open up rubber cover, and rubber cover drives sealing washer to open, and it is convenient for cable to pass, and after taking out support mechanism, and rubber cover and sealing washer elastic reset to be wrapped on the surface of cable, and avoid the water vapor through cable insulation layer and the connecting place of cold shrink intermediate joint.

The utility model relates to special gas storage technical field, propose a kind of special gas bottle storage device, including storage frame, the storage frame includes bottom plate, several steel pipes are fixed with on the bottom plate and the steel plate that connects each steel pipe in square type, the elastic bottom support mechanism for supporting special gas bottle body is provided in each grid slot, cross-shaped through slot is set up on the steel pipe around grid slot, and through slot is provided with the supporting mechanism that when special gas bottle body is pressed elastic bottom support mechanism, special gas bottle body is clamped, the utility model in the supporting mechanism is linked with elastic bottom support linkage, when special gas bottle is pressed, clamping arm is automatically rotated around rotation shaft, pressing block is in close contact with bottle body rubber washer, and arc concave surface and conical rubber washer closely adhere, form radial constraint force, inhibit bottle body to sway, rubber washer adopts the taper structure of big down small, increase the contact area with pressing block, disperse local pressure, its material can buffer bottle body tiny displacement, prolong service life.

A piston valve assembly for a reservoir shock absorber, the piston valve assembly includes a piston. The piston includes a first side and a second side, wherein the second side is opposite the first side. The piston also includes one or more compression ports and one or more rebound ports, each passing from the first side to the second side. The piston valve assembly also includes a first washer on the first side, wherein the first washer covers all the one or more rebound ports on the first side and a first parabolic disk, the first parabolic disk in partial contact with the first washer. The piston valve assembly further includes a second washer on the second side, wherein the second washer covers all the one or more compression ports on the second side and a second parabolic disk, the second parabolic disk in partial contact with the second washer.