CN100567737C - A kind of automatic deloading one-way valve of air compressor - Google Patents
A kind of automatic deloading one-way valve of air compressor Download PDFInfo
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- CN100567737C CN100567737C CNB2006100295183A CN200610029518A CN100567737C CN 100567737 C CN100567737 C CN 100567737C CN B2006100295183 A CNB2006100295183 A CN B2006100295183A CN 200610029518 A CN200610029518 A CN 200610029518A CN 100567737 C CN100567737 C CN 100567737C
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Abstract
A kind of automatic deloading one-way valve of air compressor comprises valve body; In valve body, be provided with the air-inlet cavity and the active chamber of mutual perforation from top to down; Be provided with seal element in air-inlet cavity opening one side, have center hole at the center of seal element and the off-load mouth is set on the hole wall of center; In air-inlet cavity and can be in air-inlet cavity the connecting rod of play, connecting rod one end stretches in the active chamber and is provided with a Sealing and the spool that can close or open passage between air-inlet cavity and the active chamber, the other end passes the center hole of seal element and stretches out the external world; Be arranged on unloading air drain and being arranged on a plurality of air inlet ducts on the wall of active chamber chamber on the connecting rod, one promotes the spring assist element that spool, Sealing and connecting rod are synchronized with the movement.The present invention has the unidirectional air inlet of automatic control air compressor, the function of holding one's breath, and the pressurized air of automatic deloading compressor to the utility model pipeline during shutdown guarantees that motor and compressor are not subjected to the airload effect, is easy to reset and use continuously.
Description
Technical field
The present invention relates to a kind of engineering element and parts, the automatic deloading one-way valve of parts, particularly a kind of air compressor on especially a kind of air compressor.
Background technique
At present both at home and abroad to air displacement 1m
3Following moving of/min drags micro-air compressor in the formula, normally adopt Pnenmatic automatic switch to control and regulate exhaust pressure, arrived rated pressure, motor can shut down under the control of baroswitch automatically, and the differential pressure range that surpasses baroswitch can start again automatically.Look as if energy-conservation, in fact can not because: 1, frequent starting, the electric motor starting electric current is very big; 2, poor for the natural pressure that overcomes baroswitch, Compressor Discharge Pressure must surpass the 0.25-0.35Mpa of equipment Minimum requirements pressure; And this superpressure running also is that the compressor air-discharging resistance is big, back pressure is big, power consumption is big, the heating carbon deposit, causes the fundamental cause of mechanical deterioration.And be 1.2-3m to air displacement
3/ min air compressor greatly should not be used pneumatic recloser with the air compressor of Electric Traction because of power, also must the off-load decompression and run to rated pressure continuously by diesel-driven air compressor.
For this reason, some air compressor adopts a kind of unloading one-way valve to carry out off-load, as notice of authorization number is the disclosed a kind of air compressor sliding valve style unloading one-way valve of CN 2199389Y, it comprises valve body, air-inlet cavity and outlet chamber are arranged in the valve body, the valve element is housed on the body wall of air-inlet cavity and outlet chamber intersection, the pressure regulator valve unloading valve component is housed on the valve body in addition, also have the off-load relief opening on the valve body.This air compressor sliding valve style unloading one-way valve is used on the miniature press and can substitutes Pnenmatic automatic switch, can pilot pressure again can off-load, and pressure difference is little, power consumption is little, and working conditions of compressor is improved, off-load is thorough.The valve gap of its one-way valve part has leading role, cooperates with bowl-type or cylindricality valve block, needs only that the gap is suitable buffering, throttling hypotensive effect again, can make impact noise also low, and valve block is not fragile, and the life-span is long.Because of having the throttling hypotensive effect, the instantaneous pressure in the valve gap pilot hole is lower than the gas receiver internal pressure, so back pressure is little.Be used for 1.2-3m
3On/min the air compressor, simpler than original structure, rationally.
But the claimant thinks, existing unloading one-way valve comprises above-mentioned air compressor sliding valve style unloading one-way valve, the one, and its structure is more complicated all, and used components and parts are more, remove one-way valve, also have the auxiliary copper conduit to be connected with mechanical lever switch complexity etc.; The 2nd, function singleness can only be controlled air-flow and flow to a direction, and air pressure reaches that could to pass through the mechanical lever switch in limited time disappointing; The 3rd, make and the maintenance cost height; The 4th, when disorderly closedown air pressure reaches in limited time, compressor cylinder to the pressurized gas that one-way valve connects can not be drained, if need start shooting the time again, manual operations disappointing, as deals with improperly, can damage motor and compressor.
Summary of the invention
Technical problem to be solved by this invention provides a kind of automatic deloading one-way valve of air compressor, and it can control the unidirectional air inlet of air compressor effectively automatically and hold one's breath with less components and parts and simple structure also can automatic vent off-load under the situation that reaches the shutdown of the air pressure upper limit and air compressor.
The present invention wants the technical solution problem to be achieved through the following technical solutions:
A kind of automatic deloading one-way valve of air compressor is characterized in that, comprising:
One outside thread is arranged outside one bottom, and the valve body of a suction tude joint is arranged at top; In valve body, be provided with the air-inlet cavity and the active chamber of mutual perforation from top to down; Air-inlet cavity communicates with the suction tude joint;
One is arranged on the seal element of air-inlet cavity opening one side, and the center of described seal element has a center hole and described center hole wall is provided with one in order to connect air-inlet cavity and extraneous off-load mouth:
One be arranged in the air-inlet cavity and can be in air-inlet cavity the connecting rod of play, described connecting rod one end stretches in the active chamber and is provided with a Sealing and the spool that can close or open passage between air-inlet cavity and the active chamber, and the other end passes the center hole of described seal element and stretches out the external world:
Be arranged on the air drain that unloads on the connecting rod;
Be arranged on a plurality of air inlet ducts on the wall of active chamber chamber;
One promotes the spring assist element that spool, Sealing and connecting rod are synchronized with the movement.
Further, stretch out an extraneous end at connecting rod of the present invention and also be provided with a limit element.
Described spring assist element can be arranged in the air-inlet cavity.Also can be arranged in the active chamber.When if described spring assist element is arranged in the air-inlet cavity, it is for cylindrical spring and be placed on the connecting rod, and described air-inlet cavity is arranged to up-small and down-big stepped.If when described spring assist element was arranged in the active chamber, it can be cylindrical spring, also can be volute spring, and the bottom of described spring assist element can be positioned the bottom of active chamber by positioning element.
In order to make described seal element be positioned described air-inlet cavity opening one side, be provided with position structure in described air-inlet cavity opening one side.Described position structure is preferably riveting kinking structure.
The upper-end surface of described active chamber can be the plane, also can be provided with to cooperate the sealing bulge loop that seals with described Sealing.
Described Sealing is dish-shaped rubber seal.
Described seal element comprises becoming the packing ring and the cone rubber seal ring of overlaying state up and down, offers the off-load mouth on the center hole hole wall of packing ring.The hole wall bottom periphery is provided with to lower convexity at the center of described cone rubber seal ring.Can also be provided with flange protruding upward at the center hole hole wall top of packing ring.
Described a plurality of air inlet ducts are distributed on the active chamber anchor ring and prolong anchor ring and extend axially.The upper end of described air inlet duct is not extended down to the upper-end surface of active chamber.
Air-inlet cavity of the present invention and active chamber are the cylindrical hole shape, and the diameter of active chamber is greater than the diameter of air-inlet cavity, and the diameter of air-inlet cavity is greater than the diameter of connecting rod.
Be slidingly matched between spool of the present invention and Sealing and the active chamber anchor ring, be slidingly matched between the center hole hole wall of connecting rod and seal element.
Horizontal for automatic deloading one-way valve of the present invention is arranged to, valve body be provided with one with the exhaust port of active chamber vertical connection, and the bottom of active chamber one end cap is installed and be arranged on end cap and active chamber chamber wall between seal ring.
Working principle of the present invention is: before the start, the one-way valve on the former air compressor is not removed, automatic deloading one-way valve valve body of the present invention is spun on the air compressor air storage tank again, and connects the suction tude of compressor.During start, there is pressurized air to enter in the air-inlet cavity and forces spool, Sealing and move down together with connecting rod by the suction tude joint, disappointing groove on the connecting rod is retracted in the active chamber, simultaneously under the effect of air pressure, cone rubber seal ring in the seal element inwardly shrinks, hold tightly on connecting rod tightly, thereby the off-load mouth is closed.At this moment the pressurized air in the air-inlet cavity enters air compressor air storage tank continuously by air inlet duct on the active chamber anchor ring, is work service.The spring assist element that is arranged in the air-inlet cavity can make spool when the process of inflating is initial, quickens the fast moving of spool, Sealing and connecting rod, and initial airspeed is strengthened.
When air compressor air storage tank pressure reaches rated pressure and shuts down, spool in air compressor air storage tank air pressure and be arranged under the spring assist element acting in conjunction in the active chamber, spool and Sealing are upwards floated fast to form effective seal.When floating to limit position on the spool, Sealing tightly be pressed on the active chamber upper-end surface or the sealing bulge loop of upper-end surface on, be in the hermetically closing state between active chamber and the air-inlet cavity thereby make.Spool upwards floats, and then it is up to promote connecting rod, makes disappointing groove on the connecting rod with off-load mouth and air-inlet cavity conducting, at this moment compressor between the present invention and the pressurized air in the pipeline of the present invention by the disappointing groove on the connecting rod through the discharge of off-load mouth, reach the off-load effect.
The present invention has the unidirectional air inlet of automatic control air compressor, the function of holding one's breath, and the pressurized air of automatic deloading compressor to the pipeline of the present invention during shutdown guarantees that motor and compressor are not subjected to the airload effect, is easy to reset and use continuously.Simultaneously also protect the machine protected from wear, prolong its working life.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is that the embodiment of the invention 1 is in the structural representation under the state of inflating;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the view of the embodiment of the invention 2 when being in off-load.
Fig. 4 is that the embodiment of the invention 3 is in the structural representation under the state of inflating.
Fig. 5 is that the embodiment of the invention 4 is in the structural representation under the state of inflating.
Fig. 6 is the structural representation that unloads air drain on the embodiment of the invention 5 described connecting rods.
Fig. 7 is the structural representation that unloads air drain on the embodiment of the invention 6 described connecting rods.
Fig. 8 is the structural representation that unloads air drain on the embodiment of the invention 7 described connecting rods.
Embodiment
Below further specify the present invention by embodiment, but should be understood that following embodiment is exemplary, the present invention does not limit to this.
Referring to Fig. 1 and Fig. 2, a kind of automatic deloading one-way valve of air compressor, comprise a valve body 1, valve body 1 outer bottom is provided with an outside thread 2 that is connected with air compressor air storage tank or portable inflating pump joint, be provided with a suction tude joint 3 that is connected as a single entity with valve body 1 on the top of valve body 1, suction tude joint 3 is connected with compressor by the outside thread 18 on it; The middle part is provided with to be convenient to the automatic deloading one-way valve is installed in hexagonal end face 19 on air compressor air storage tank or the portable inflating pump joint.
In valve body 1, be provided with the air-inlet cavity 16 and the active chamber 6 that are positioned on the same axis and connect successively from top to down; Inlet hole 7 in the suction tude joint 3 communicates with air-inlet cavity 16.Air-inlet cavity 16 is on the same vertical axis with active chamber 6.Inlet hole 7 in the suction tude joint 3 communicates in oblique crossing mode with air-inlet cavity 16.
Air-inlet cavity 16 and active chamber 6 are the cylindrical hole shape, and the diameter of active chamber 6 is greater than the diameter of air-inlet cavity 16.
Be provided with seal element in air-inlet cavity 16 openings one side, the sealing element comprises with the up and down packing ring 14 and the cone rubber seal ring 20 of overlaying state; One off-load mouth 17 is arranged on the center hole wall of packing ring 14; The hole wall bottom periphery is provided with to lower convexity 15 at the center of cone rubber seal ring 20.
The spool 8 that can fluctuate is arranged in the active chamber 6 and be installed in the dish-shaped rubber seal 9 that fluctuates with spool 8 on spool 8 upper-end surfaces; Be slidingly matched between spool 8 and dish-shaped rubber seal 9 and active chamber 6 anchor rings.Be provided with dish-shaped rubber seal 9 in the upper-end surface of active chamber 6 and cooperate the sealing bulge loop 4 that seals, when floating to limit position on the spool 8, dish rubber seal 9 tightly is pressed on the sealing bulge loop 4, makes to constitute a sealing effectively between dish-shaped rubber seal 9 and the sealing bulge loop 4.And when dish-shaped rubber seal 9 leaves sealing bulge loop 4, be to constitute sealing, and be in open state.Can in air compressor air storage tank, charge into work gas as required if decide like this.
In active chamber 6, be provided with a volute spring 21, can certainly be cylindrical spring.The top of volute spring 21 contacts with the bottom surface of spool 8, its bottom can by by a locating stud 22 or location card loop mapping in the bottom of active chamber 6.The method that can certainly adopt other is volute spring 21 location.
Have in uniform way at active chamber 6 anchor rings and to prolong a plurality of axial air inlet ducts 12 of anchor ring, and the upper end of air inlet duct 12 is not extended down to the upper-end surface of active chamber 6, the width of air inlet duct 12 and depth number can determine that this is not difficult to those skilled in the art according to the power of compressor and the factors such as volume of air compressor air storage tank.
If the flow of air compressor is big, compressed air stream can not enter active chamber 6 by air-inlet cavity 16 and air inlet duct 12 fast, in order to strengthen airflow space, the size of spool 8 and dish-shaped rubber seal 9 can be dwindled, make the air-flow that enters air-inlet cavity 16 by inlet hole 7 can arrive active chamber 6 fast.
Be connected with the connecting rod 10 that upwards passes the center hole of dish-shaped rubber seal 9, air-inlet cavity 16, cone rubber seal ring 20 and packing ring 14 successively and stretch out off-load mouth 17 on the spool 8, the diameter of air-inlet cavity 16 is greater than the diameter of connecting rod 10, and connecting rod 10 fluctuates with spool 8.Be slidingly matched between the center hole hole wall of connecting rod 10 and packing ring 14 and cone rubber seal ring 20.
In order to make the seal element that constitutes by cone rubber seal ring 20 and packing ring 14 be positioned air-inlet cavity 16 openings one side, be provided with a riveting kinking structure 23 in air-inlet cavity 16 openings one side.Before cone rubber seal ring 20 and packing ring 14 are installed, riveting kinking structure 23 is a straight flange, after installing cone rubber seal ring 20 and packing ring 14, riveting kinking structure 23 can be bended, just can make cone rubber seal ring 20 and packing ring 14 be fixed on air-inlet cavity 16 openings one side.
On the anchor ring of connecting rod 10, have a plurality of disappointing grooves 11 and be equipped with one and locate nut 13 on the top of connecting rod 10.This positioning screw cap 13 is the limit element of connecting rod 10, the following pan position of limiting rod 10 and spool 8.
During off-load, air pressure will float to limit position on the spool 8, dish rubber seal 9 tightly is pressed on the sealing bulge loop 4 on active chamber 6 upper-end surfaces, thereby make between active chamber 6 and the air-inlet cavity 16 and be in the hermetically closing state, certainly in the off-load process, make dish-shaped rubber seal 9 and sealing bulge loop 4 constitute effective seal more fast by the thrust of spring.Spool 8 upwards floats, and then it is up to promote connecting rod 10, make disappointing groove 11 on the connecting rod 10 with off-load mouth 17 and air-inlet cavity 16 conductings, at this moment compressor between the present invention and the pressurized air in the pipeline of the present invention discharge through off-load mouth 17 by the disappointing groove 11 on the connecting rod 10, reach the off-load effect.
Referring to Fig. 3, a kind of automatic deloading one-way valve of air compressor, comprise a valve body 1, valve body 1 outer bottom is provided with an outside thread 2 that is connected with air compressor air storage tank or portable inflating pump joint, be provided with a suction tude joint 3 that is connected as a single entity with valve body 1 on the top of valve body 1, suction tude joint 3 is connected with compressor by the outside thread 18 on it; The middle part is provided with to be convenient to the automatic deloading one-way valve is installed in hexagonal end face 19 on air compressor air storage tank or the portable inflating pump joint.
In valve body 1, be provided with the air-inlet cavity 16 and the active chamber 6 that are positioned on the same axis and connect successively from top to down; Inlet hole 7 in the suction tude joint 3 communicates with air-inlet cavity 16.Air-inlet cavity 16 is on the same vertical axis with active chamber 6.Inlet hole 7 in the suction tude joint 3 communicates in oblique crossing mode with air-inlet cavity 16.
Air-inlet cavity 16 and active chamber 6 are the cylindrical hole shape, and the diameter of active chamber 6 is greater than the diameter of air-inlet cavity 16.Air-inlet cavity 16 is arranged to up-small and down-big stepped.
Be provided with seal element in air-inlet cavity 16 openings one side, the sealing element comprises with the up and down packing ring 14 and the cone rubber seal ring 20 of overlaying state; One off-load mouth 17 is arranged on the center hole wall of packing ring 14; The hole wall bottom periphery is provided with to lower convexity 15 at the center of cone rubber seal ring 20.
The spool 8 that can fluctuate is arranged in the active chamber 6 and be installed in the dish-shaped rubber seal 9 that fluctuates with spool 8 on spool 8 upper-end surfaces; Be slidingly matched between spool 8 and dish-shaped rubber seal 9 and active chamber 6 anchor rings.Be provided with dish-shaped rubber seal 9 in the upper-end surface of active chamber 6 and cooperate the sealing bulge loop 4 that seals, when floating to limit position on the spool 8, dish rubber seal 9 tightly is pressed on the sealing bulge loop 4, makes to constitute a sealing effectively between dish-shaped rubber seal 9 and the sealing bulge loop 4.And when dish-shaped rubber seal 9 leaves sealing bulge loop 4, be to constitute sealing, and be in open state.Can in air compressor air storage tank, charge into work gas as required if decide like this.
Have in uniform way at active chamber 6 anchor rings and to prolong a plurality of axial air inlet ducts 12 of anchor ring, and the upper end of air inlet duct 12 is not extended down to the upper-end surface of active chamber 6, the width of air inlet duct 12 and depth number can determine that this is not difficult to those skilled in the art according to the power of compressor and the factors such as volume of air compressor air storage tank.
If the flow of air compressor is big, compressed air stream can not enter active chamber 6 by air-inlet cavity 16 and air inlet duct 12 fast, in order to strengthen airflow space, the size of spool 8 and dish-shaped rubber seal 9 can be dwindled, make the air-flow that enters air-inlet cavity 16 by inlet hole 7 can arrive active chamber 6 fast.
Be connected with the connecting rod 10 that upwards passes the center hole of dish-shaped rubber seal 9, air-inlet cavity 16, cone rubber seal ring 20 and packing ring 14 successively and stretch out off-load mouth 17 on the spool 8, the diameter of air-inlet cavity 16 is greater than the diameter of connecting rod 10, and connecting rod 10 fluctuates with spool 8.Be slidingly matched between the center hole hole wall of connecting rod 10 and packing ring 14 and cone rubber seal ring 20.
In air-inlet cavity 16, be provided with a cylindrical spring 24 and be placed on the connecting rod 10, the top of cylindrical spring 24 contacts with air-inlet cavity 16 ladder surfaces, and the bottom contacts with dish-shaped rubber seal 9.The cylindrical spring 24 that is arranged in the air-inlet cavity 16 can make spool 8 when the process of inflating is initial, quickens the fast moving of spool 8, dish-shaped rubber seal 9 and connecting rod 10, and initial airspeed is strengthened.
The working principle of present embodiment does not describe in detail at this with embodiment 1.
Referring to Fig. 4, present embodiment and embodiment's 2 difference is that the upper-end surface of active chamber 6 is the plane, is provided with flange protruding upward 5 at the center hole hole wall top of packing ring 14.All the other are with embodiment 2.
Embodiment 4
Referring to Fig. 5, present embodiment is a horizontal automatic deloading one-way valve, itself and embodiment's 1 difference is, valve body 1 be provided with one with the exhaust port 25 of active chamber 6 vertical connections, and the bottom of active chamber 6 end cap 27 is installed and be arranged on end cap 27 and active chamber 6 chamber walls between O RunddichtringO 28.Be threaded between end cap 27 and the valve body 1.The outside thread 2 and exhaust port 25 coaxial lines that are connected with air compressor air storage tank or portable inflating pump joint.All the other are with embodiment 1.
Referring to Fig. 6, the difference of present embodiment and the foregoing description is, unloads air drain 11 and is two and be symmetricly set on the breach on the connecting rod anchor ring.All the other are with above-mentioned embodiment.
Referring to Fig. 7, the difference of present embodiment and the foregoing description is, unloads air drain 11 for being arranged on the circular groove on the connecting rod anchor ring.All the other are with above-mentioned embodiment.
Referring to Fig. 8, the difference of present embodiment and the foregoing description is, unloads air drain 11 and is one and be arranged on the radial hole that axial bores and two in the connecting rod 10 connect axial bores.All the other are with above-mentioned embodiment.
Certainly,, do not spend performing creative labour, on the basis of the foregoing description, can do multiple variation, can realize purpose of the present invention equally for one of ordinary skill in the art.But above-mentioned various variations obviously should be in the protection domain of claims of the present invention.
Claims (12)
1, a kind of automatic deloading one-way valve of air compressor is characterized in that, comprising:
One outside thread is arranged outside one bottom, and the valve body of a suction tude joint is arranged at top; In valve body, be provided with the air-inlet cavity and the active chamber of mutual perforation from top to down; Air-inlet cavity communicates with the suction tude joint;
One is arranged on the seal element of air-inlet cavity opening one side, and the center of described seal element has a center hole and described center hole wall is provided with one in order to connect air-inlet cavity and extraneous off-load mouth;
One be arranged in the air-inlet cavity and can be in air-inlet cavity the connecting rod of play, described connecting rod one end stretches in the active chamber and is provided with a Sealing and the spool that can close or open passage between air-inlet cavity and the active chamber, and the other end passes the center hole of described seal element and stretches out the external world;
Be arranged on the air drain that unloads on the connecting rod;
Be arranged on a plurality of air inlet ducts on the wall of active chamber chamber:
One promotes the spring assist element that spool, Sealing and connecting rod are synchronized with the movement.
2, automatic deloading one-way valve according to claim 1 is characterized in that, described connecting rod stretches out an extraneous end and also is provided with a limit element.
3, automatic deloading one-way valve according to claim 1 and 2 is characterized in that, described spring assist element is arranged in the air-inlet cavity.
4, automatic deloading one-way valve according to claim 1 and 2 is characterized in that, described spring assist element is arranged in the active chamber.
5, automatic deloading one-way valve according to claim 3 is characterized in that, described spring assist element is cylindrical spring and is placed on the connecting rod, and described air-inlet cavity is arranged to up-small and down-big stepped.
6, automatic deloading one-way valve according to claim 4 is characterized in that, described spring assist element is a volute spring, and the bottom of described spring assist element can be positioned the bottom of active chamber by positioning element.
7, automatic deloading one-way valve according to claim 1 and 2 is characterized in that, is provided with the position structure of a location seal element in described air-inlet cavity opening one side.
8, automatic deloading one-way valve according to claim 1 is characterized in that, the upper end of described air inlet duct is not extended down to the upper-end surface of active chamber.
9, automatic deloading one-way valve according to claim 1 is characterized in that, described valve body be provided with one with the exhaust port of active chamber vertical connection, and the bottom of active chamber one end cap is installed and be arranged on end cap and active chamber chamber wall between seal ring.
10, automatic deloading one-way valve according to claim 1 is characterized in that, the described air drain that unloads is two to be symmetricly set on the breach on the connecting rod anchor ring.
11, automatic deloading one-way valve according to claim 1 is characterized in that, the described air drain that unloads is the circular groove that is arranged on the connecting rod anchor ring.
12, automatic deloading one-way valve according to claim 1 is characterized in that, the described air drain that unloads is one to be arranged on the radial hole that axial bore and two in the connecting rod connects axial bores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100295183A CN100567737C (en) | 2006-07-28 | 2006-07-28 | A kind of automatic deloading one-way valve of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100295183A CN100567737C (en) | 2006-07-28 | 2006-07-28 | A kind of automatic deloading one-way valve of air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101113729A CN101113729A (en) | 2008-01-30 |
| CN100567737C true CN100567737C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100295183A Expired - Fee Related CN100567737C (en) | 2006-07-28 | 2006-07-28 | A kind of automatic deloading one-way valve of air compressor |
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| CN (1) | CN100567737C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102052291B (en) * | 2011-01-18 | 2015-09-02 | 凯龙高科技股份有限公司 | For the one-way valve of metering pump |
| CN204573209U (en) * | 2015-05-08 | 2015-08-19 | 莫少难 | A kind of structure improved one-way valve |
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Granted publication date: 20091209 Termination date: 20130728 |