CN105465056A - Hydraulic system for recycling elastic potential energy generated by deformation of test pieces - Google Patents

Hydraulic system for recycling elastic potential energy generated by deformation of test pieces Download PDF

Info

Publication number
CN105465056A
CN105465056A CN201610007703.6A CN201610007703A CN105465056A CN 105465056 A CN105465056 A CN 105465056A CN 201610007703 A CN201610007703 A CN 201610007703A CN 105465056 A CN105465056 A CN 105465056A
Authority
CN
China
Prior art keywords
oil
hydraulic
accumulator
oil hydraulic
potential energy
Prior art date
Application number
CN201610007703.6A
Other languages
Chinese (zh)
Inventor
张旭蓝
何庄毓
Original Assignee
张旭蓝
何庄毓
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张旭蓝, 何庄毓 filed Critical 张旭蓝
Priority to CN201610007703.6A priority Critical patent/CN105465056A/en
Publication of CN105465056A publication Critical patent/CN105465056A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02Installations or systems with accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/14Energy-recuperation means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/20Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205Systems with pumps
    • F15B2211/20507Type of prime mover
    • F15B2211/20515Electric motor

Abstract

The invention relates to a hydraulic system for recycling elastic potential energy generated by deformation of test pieces. The hydraulic system comprises a first energy accumulator, a first reversing valve, a hydraulic cylinder, a second reversing valve, a second energy accumulator, a hydraulic motor and a first hydraulic pump, wherein the first energy accumulator, the first reversing valve and the hydraulic cylinder are sequentially communicated through oil pipes; the hydraulic cylinder, the second reversing valve, the second energy accumulator, the hydraulic motor and the first hydraulic pump are sequentially communicated through oil pipes; and the first hydraulic pump is communicated with the first energy accumulator through an oil pipe. Compared with the prior art, the hydraulic system is simple in structure, high in work efficiency and capable of recycling energy and effectively reducing the experimental cost.

Description

A kind of hydraulic system recycling testpieces elastomeric deformable potential energy

Technical field

The present invention relates to technical field of hydraulic pressure, particularly a kind of hydraulic system recycling testpieces elastomeric deformable potential energy.

Background technique

Hydraulic driving is widely used in mechanical test part fatigue durability test, be characterized in that driving force is large, vibration frequency is high, and reliability is high, and the symmetrical vibratory test for Zero Crossing Point can be tested by the mode of resonance, if asymmetric vibratory test, or the vibratory test of inclined Zero Crossing Point one side, just can not test by the mode of resonance, the energy consumption of test is very large, cost is very high, urgently to be resolved hurrily.

Summary of the invention

Technical problem to be solved by this invention is to provide that a kind of structure is simple, working efficiency is high, can realize energy regenerating and utilize, effectively reduce the hydraulic system of the recycling testpieces elastomeric deformable potential energy of experimentation cost.

The technological scheme that the present invention solves the problems of the technologies described above is as follows: a kind of hydraulic system recycling testpieces elastomeric deformable potential energy, first accumulator, the first selector valve, oil hydraulic cylinder, the second selector valve, the second accumulator, oil hydraulic motor and the first oil hydraulic pump, described first accumulator, the first selector valve are communicated with by oil pipe successively with oil hydraulic cylinder, described oil hydraulic cylinder, the second selector valve, the second accumulator, oil hydraulic motor are communicated with by oil pipe successively with the first oil hydraulic pump, and described first oil hydraulic pump is communicated with by oil pipe with described first accumulator.

The invention has the beneficial effects as follows: by the coordinate operation of the first accumulator, the first selector valve, oil hydraulic cylinder, the second selector valve, the second accumulator, oil hydraulic motor and the first oil hydraulic pump, compression testing can be carried out to testpieces, working efficiency is high, testpieces also can carry out elasticity rise to oil hydraulic cylinder, oil hydraulic cylinder can be recycled the energy that elasticity is gone up, carry out energy recycling by hydraulic oil, thus realize energy regenerating utilization, effectively reduce experimentation cost.

On the basis of technique scheme, the present invention can also do following improvement.

Further technological scheme, is provided with mechanical actuating mechanism in described oil hydraulic cylinder, and the bottom of described mechanical actuating mechanism is stretched out described oil hydraulic cylinder downwards and compressed test piece.

Adopt the beneficial effect of above-mentioned further scheme to be: oil hydraulic cylinder is compressed testpieces by mechanical actuating mechanism, and test piece can carry out resilience to mechanical actuating mechanism, move in circles the test realized testpieces, and testing efficiency is high.

Preferably, the top of described mechanical actuating mechanism is moved in described oil hydraulic cylinder, and will be divided into upper cavity and the lower chamber of variable volume in described oil hydraulic cylinder, described upper cavity and lower chamber are all communicated with by oil pipe with the second selector valve with described first selector valve.

Adopt the beneficial effect of above-mentioned further scheme to be: by the first selector valve to upper cavity injection liquid force feed, mechanical actuating mechanism moves down, testpieces compresses, and the hydraulic oil simultaneously in lower chamber is back to the second selector valve; Testpieces elasticity is gone up, and promotes mechanical actuating mechanism and moves up, and the hydraulic oil simultaneously in upper cavity is back to the second selector valve, realizes the recycling of testpieces elastic potential energy.

Preferably, on the oil pipe between described second selector valve and described second accumulator, and oil pipe between described first oil hydraulic pump and described first accumulator is provided with the first one-way valve.

Adopt the beneficial effect of above-mentioned further scheme to be: the first one-way valve can effectively prevent the hydraulic oil in oil pipe from refluxing, ensure that the hydraulic oil of backflow keeps pressure, promote the recycling of energy.

Preferably, the oil pipe between described second accumulator and described oil hydraulic motor is provided with solenoid valve.

The beneficial effect of above-mentioned further scheme is adopted to be: solenoid valve can regulate and control the hydraulic oil in oil pipe, adapts to the test rhythm to testpieces, lifting test efficiency.

Preferably, on the oil pipe between described second accumulator and described solenoid valve, and oil pipe between described first oil hydraulic pump and described first accumulator is provided with pressure measuring instruments.

The beneficial effect of above-mentioned further scheme is adopted to be: pressure measuring instruments can effectively show the pressure of hydraulic oil in oil pipe in real time, ensures the orderly function of this equipment safety.

Preferably, on the oil pipe between described second accumulator and described solenoid valve, and oil pipe between described first oil hydraulic pump and described first accumulator is provided with safety valve.

The beneficial effect of above-mentioned further scheme is adopted to be: safety valve can be stablized the pressure that carries out of the hydraulic oil in oil pipe, ensures the orderly function of this equipment safety.

Preferably, also comprise the second oil hydraulic pump and motor, the output shaft of described motor is connected with described second oil hydraulic pump, and the oil outlet of described second oil hydraulic pump is communicated with by oil pipe with described first accumulator.

Adopt the beneficial effect of above-mentioned further scheme to be: driven by motor second oil hydraulic pump operates, the second oil hydraulic pump to the first accumulator input hydraulic pressure oil, can carry out hydraulic oil to the first accumulator and supplements, ensure that this device steady ordered runs

Preferably, the oil pipe between the oil outlet of described second oil hydraulic pump and described first accumulator is provided with the second one-way valve.

Adopt the beneficial effect of above-mentioned further scheme to be: the second one-way valve can effectively prevent the hydraulic oil in oil pipe from refluxing, ensure that the hydraulic oil of backflow keeps pressure.

Preferably, described oil hydraulic motor, the first oil hydraulic pump and the second oil hydraulic pump are all connected with hydraulic oil container.

The beneficial effect of above-mentioned further scheme is adopted to be: hydraulic oil container can carry out hydraulic oil and supplement, and ensures the stable operation of this device.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation recycling the hydraulic system of testpieces elastomeric deformable potential energy of the present invention.

In accompanying drawing, the list of parts representated by each label is as follows:

1, the first accumulator, the 2, first selector valve, 3, oil hydraulic cylinder, 4, the second selector valve, the 5, second accumulator, 6, oil hydraulic motor, 7, the first oil hydraulic pump, 8, mechanical actuating mechanism, the 9, first one-way valve, 10, solenoid valve, 11, pressure measuring instruments, 12, safety valve, 13, the second oil hydraulic pump, 14, motor, the 15, second one-way valve, 16, hydraulic oil container.

Embodiment

Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.

As shown in Figure 1, a kind of hydraulic system recycling testpieces elastomeric deformable potential energy, first accumulator 1, first selector valve 2, oil hydraulic cylinder 3, second selector valve 4, second accumulator 5, oil hydraulic motor 6 and the first oil hydraulic pump 7, described first accumulator 1, first selector valve 2 is communicated with by oil pipe successively with oil hydraulic cylinder 3, described oil hydraulic cylinder 3, second selector valve 4, second accumulator 5, oil hydraulic motor 6 are communicated with by oil pipe successively with the first oil hydraulic pump 7, and described first oil hydraulic pump 7 is communicated with by oil pipe with described first accumulator 1.

Preferably, be provided with mechanical actuating mechanism 8 in described oil hydraulic cylinder 3, the bottom of described mechanical actuating mechanism 8 is stretched out described oil hydraulic cylinder 3 pairs of test piece downwards and is compressed.

Preferably, the top of described mechanical actuating mechanism 8 is mobile in described oil hydraulic cylinder 3, to be divided into upper cavity and the lower chamber of variable volume in described oil hydraulic cylinder 3, described upper cavity and lower chamber are all communicated with by oil pipe with the second selector valve 4 with described first selector valve 2.

Preferably, on the oil pipe between described second selector valve 4 and described second accumulator 5, and oil pipe between described first oil hydraulic pump 7 and described first accumulator 1 is provided with the first one-way valve 9.

Preferably, the oil pipe between described second accumulator 5 and described oil hydraulic motor 6 is provided with solenoid valve 10.

Preferably, on the oil pipe between described second accumulator 5 and described solenoid valve 10, and oil pipe between described first oil hydraulic pump 7 and described first accumulator 1 is provided with pressure measuring instruments 11.

Preferably, on the oil pipe between described second accumulator 5 and described solenoid valve 10, and oil pipe between described first oil hydraulic pump 7 and described first accumulator 1 is provided with safety valve 12.

Preferably, also comprise the second oil hydraulic pump 13 and motor 14, the output shaft of described motor 14 is connected with described second oil hydraulic pump 13, and the oil outlet of described second oil hydraulic pump 13 is communicated with by oil pipe with described first accumulator 1.

Preferably, the oil pipe between the oil outlet of described second oil hydraulic pump 13 and described first accumulator 1 is provided with the second one-way valve 15.

Preferably, described oil hydraulic motor 6, first oil hydraulic pump 7 and the second oil hydraulic pump 13 are all connected with hydraulic oil container 16.

Implement this device, motor 14 drives the second oil hydraulic pump 13 high pressure oil to be injected the first accumulator 1, after the pressure of the first accumulator 1 is measured reached setting pressure by pressure measuring instruments 11, first selector valve 2 and the action simultaneously of the second selector valve 4 are to A position, at this moment the high pressure oil of the first accumulator 1 is injected into the upper cavity of oil hydraulic cylinder 3, oil hydraulic cylinder 3 promotes testpieces compression by mechanical actuating mechanism 8, and at this moment oil hydraulic cylinder 3 acting is converted into the elastic potential energy of testpieces; First selector valve 2 and the action simultaneously of the second selector valve 4 are to B position, the elastic potential energy release of testpieces promotes mechanical actuating mechanism 8 and gos up, hydraulic oil in oil hydraulic cylinder 3 upper cavity is pressed into the second accumulator 5, after the pressure of the second accumulator 5 reaches setting pressure, open solenoid valve 10, comparatively low pressure hydraulic oil in second accumulator 5 drives the first oil hydraulic pump 7 by oil hydraulic motor 6, high pressure oil is injected the first accumulator 1; Second oil hydraulic pump 13 work on replenishment system leak homenergic loss.Reach the recycling of energy; The present invention is simple and practical, and working efficiency is high, and this structure may be used on the recycling realizing part deformation elastic potential energy in this type of hydraulic system

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. recycle the hydraulic system of testpieces elastomeric deformable potential energy for one kind, it is characterized in that: the first accumulator (1), first selector valve (2), oil hydraulic cylinder (3), second selector valve (4), second accumulator (5), oil hydraulic motor (6) and the first oil hydraulic pump (7), described first accumulator (1), first selector valve (2) is communicated with by oil pipe successively with oil hydraulic cylinder (3), described oil hydraulic cylinder (3), second selector valve (4), second accumulator (5), oil hydraulic motor (6) is communicated with by oil pipe successively with the first oil hydraulic pump (7), described first oil hydraulic pump (7) is communicated with by oil pipe with described first accumulator (1).
2. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 1, it is characterized in that: be provided with mechanical actuating mechanism (8) in described oil hydraulic cylinder (3), the bottom of described mechanical actuating mechanism (8) is stretched out described oil hydraulic cylinder (3) downwards and is compressed test piece.
3. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 2, it is characterized in that: the top of described mechanical actuating mechanism (8) is mobile in described oil hydraulic cylinder (3), to be divided into upper cavity and the lower chamber of variable volume in described oil hydraulic cylinder (3), described upper cavity and lower chamber are all communicated with by oil pipe with the second selector valve (4) with described first selector valve (2).
4. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 1, it is characterized in that: on the oil pipe between described second selector valve (4) and described second accumulator (5), and oil pipe between described first oil hydraulic pump (7) and described first accumulator (1) is provided with the first one-way valve (9).
5. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 1, is characterized in that: the oil pipe between described second accumulator (5) and described oil hydraulic motor (6) is provided with solenoid valve (10).
6. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 5, it is characterized in that: on the oil pipe between described second accumulator (5) and described solenoid valve (10), and oil pipe between described first oil hydraulic pump (7) and described first accumulator (1) is provided with pressure measuring instruments (11).
7. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 5, it is characterized in that: on the oil pipe between described second accumulator (5) and described solenoid valve (10), and oil pipe between described first oil hydraulic pump (7) and described first accumulator (1) is provided with safety valve (12).
8. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to any one of claim 1 to 7, it is characterized in that: also comprise the second oil hydraulic pump (13) and motor (14), the output shaft of described motor (14) is connected with described second oil hydraulic pump (13), and the oil outlet of described second oil hydraulic pump (13) is communicated with by oil pipe with described first accumulator (1).
9. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 8, is characterized in that: the oil pipe between the oil outlet of described second oil hydraulic pump (13) and described first accumulator (1) is provided with the second one-way valve (15).
10. a kind of hydraulic system recycling testpieces elastomeric deformable potential energy according to claim 8, is characterized in that: described oil hydraulic motor (6), the first oil hydraulic pump (7) and the second oil hydraulic pump (13) are all connected with hydraulic oil container (16).
CN201610007703.6A 2016-01-06 2016-01-06 Hydraulic system for recycling elastic potential energy generated by deformation of test pieces CN105465056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610007703.6A CN105465056A (en) 2016-01-06 2016-01-06 Hydraulic system for recycling elastic potential energy generated by deformation of test pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610007703.6A CN105465056A (en) 2016-01-06 2016-01-06 Hydraulic system for recycling elastic potential energy generated by deformation of test pieces

Publications (1)

Publication Number Publication Date
CN105465056A true CN105465056A (en) 2016-04-06

Family

ID=55603117

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610007703.6A CN105465056A (en) 2016-01-06 2016-01-06 Hydraulic system for recycling elastic potential energy generated by deformation of test pieces

Country Status (1)

Country Link
CN (1) CN105465056A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286429A (en) * 2016-10-28 2017-01-04 山河智能装备股份有限公司 A kind of can the energy-saving control valve of multi-stage booster
CN108561349A (en) * 2018-07-13 2018-09-21 北京航空航天大学 With the controllable load-on module along inverse load energy management and control function

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090000290A1 (en) * 2007-06-29 2009-01-01 Caterpillar Inc. Energy recovery system
CN202089726U (en) * 2010-05-13 2011-12-28 济南谨恒节能技术有限公司 Energy-saving walking type hydraulic carrying machine
CN102619818A (en) * 2011-01-31 2012-08-01 波克兰液压工业设备公司 Hydraulic transmission device allowing the recovery of energy
CN102889273A (en) * 2012-10-18 2013-01-23 浙江大学 Electro-hydraulic system for recycling and releasing potential energy of engineering machinery
CN103267034A (en) * 2013-05-10 2013-08-28 浙江大学 Load sensitive hydraulic system with compensation valve energy recovery function
CN104334893A (en) * 2012-06-04 2015-02-04 卡特彼勒公司 Electro-hydraulic system for recovering and reusing potential energy
CN104613055A (en) * 2015-01-30 2015-05-13 福建工程学院 Hydraulic type energy recovery system for potential energy of boom of excavator
CN204403006U (en) * 2014-12-19 2015-06-17 长安大学 A kind of can recovery test power consumption oil hydraulic pump and motor test rig

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090000290A1 (en) * 2007-06-29 2009-01-01 Caterpillar Inc. Energy recovery system
CN202089726U (en) * 2010-05-13 2011-12-28 济南谨恒节能技术有限公司 Energy-saving walking type hydraulic carrying machine
CN102619818A (en) * 2011-01-31 2012-08-01 波克兰液压工业设备公司 Hydraulic transmission device allowing the recovery of energy
CN104334893A (en) * 2012-06-04 2015-02-04 卡特彼勒公司 Electro-hydraulic system for recovering and reusing potential energy
CN102889273A (en) * 2012-10-18 2013-01-23 浙江大学 Electro-hydraulic system for recycling and releasing potential energy of engineering machinery
CN103267034A (en) * 2013-05-10 2013-08-28 浙江大学 Load sensitive hydraulic system with compensation valve energy recovery function
CN204403006U (en) * 2014-12-19 2015-06-17 长安大学 A kind of can recovery test power consumption oil hydraulic pump and motor test rig
CN104613055A (en) * 2015-01-30 2015-05-13 福建工程学院 Hydraulic type energy recovery system for potential energy of boom of excavator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106286429A (en) * 2016-10-28 2017-01-04 山河智能装备股份有限公司 A kind of can the energy-saving control valve of multi-stage booster
CN108561349A (en) * 2018-07-13 2018-09-21 北京航空航天大学 With the controllable load-on module along inverse load energy management and control function
CN108561349B (en) * 2018-07-13 2019-12-31 北京航空航天大学 Controllable loading module with forward and backward load capacity control function

Similar Documents

Publication Publication Date Title
JP6518739B2 (en) accumulator
CN103016453B (en) Impulse test system of hydraulic hose
GB201009012D0 (en) Method and apparatus for extracting energy from a fluctuating energy flow from a renewable energy source
CN201769389U (en) Hydraulic press
CN101852220B (en) Controllable high-pressure high-flow generating device and control method thereof
CN201013312Y (en) Oil extraction load simulator
CN203532179U (en) Hydraulic driving type mud sucking and discharging device
CN202023797U (en) Pumping mechanism and pulse vibration absorption device thereof, and concrete pumping machine
CN201148948Y (en) Magnetic control automatic reversing controlled gas drive hydraulic pump
CN102664556A (en) Piezoelectric energy harvester for recovering pressure pulsation energy of liquid
CN202126341U (en) Pressure test device
CN203702962U (en) Air pressure type electric generation shock absorber
CN102102688B (en) High-speed heavy-duty linear reciprocating body operation energy storage device
CN202614611U (en) Negative pressure endurance test device
CN105004616A (en) Cryogenic vessel multi-performance test device and test method
CN203853963U (en) Hammering device
CN203362126U (en) Core reservoir oil displacement experimental device
CN101424281A (en) Ultra-high pressure aqueous medium supercharger
CN101782085A (en) Method for storing and releasing hydraulic energy and gas, water and oil storage device applying same
CN104613025B (en) A kind of hydraulic system and the method for hydraulic actuator back pressure stroke energy regenerating
CN103939421A (en) Fatigue test method and device used for hydraulic cylinder
CN104612928B (en) Hydraulic bidirectional effect pumping installations
EP2689127A1 (en) Improvements to the power capture of wave energy converters
CN101793247A (en) Concrete pump truck and concrete delivery pump exchange system
CN104948538A (en) Plate bending machine servo hydraulic system and construction method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20160406