CN109029964B - Detection device and method for self-adaptive fuel pressure valves with different specifications - Google Patents

Detection device and method for self-adaptive fuel pressure valves with different specifications Download PDF

Info

Publication number
CN109029964B
CN109029964B CN201811008133.8A CN201811008133A CN109029964B CN 109029964 B CN109029964 B CN 109029964B CN 201811008133 A CN201811008133 A CN 201811008133A CN 109029964 B CN109029964 B CN 109029964B
Authority
CN
China
Prior art keywords
fuel pressure
pressure valve
fixedly arranged
oil outlet
self
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN201811008133.8A
Other languages
Chinese (zh)
Other versions
CN109029964A (en
Inventor
荣庆丰
鲁家军
王海成
韩景川
周琴
曾大全
李亮
王慧娟
王社新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jice Suzhou Test System Co ltd
Original Assignee
Jice Suzhou Test System Co ltd
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 Jice Suzhou Test System Co ltd filed Critical Jice Suzhou Test System Co ltd
Priority to CN201811008133.8A priority Critical patent/CN109029964B/en
Publication of CN109029964A publication Critical patent/CN109029964A/en
Application granted granted Critical
Publication of CN109029964B publication Critical patent/CN109029964B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Safety Valves (AREA)

Abstract

The invention discloses a detection device for self-adaptive fuel pressure valves with different specifications, which comprises a rack and a containing plate fixedly arranged on the rack, wherein a containing groove for containing the fuel pressure valve is formed in the containing plate, and an oil outlet end of the fuel pressure valve penetrates through the containing groove and extends to the outside of the containing groove; the two sides of the fuel pressure valve are provided with positioning components which are fixedly arranged on the accommodating plate and used for positioning the fuel pressure valve, and a control component which is fixedly arranged on the frame and used for controlling the pretightening force of the fuel pressure valve is arranged above the fuel pressure valve; and a detection assembly for detecting the oil outlet end of the fuel pressure valve is further arranged on the frame. The beneficial effects of the invention are mainly as follows: the fuel pressure valve testing device has the advantages of being simple in structure and exquisite in design, reducing the workload of fuel pressure valve testing personnel, greatly improving the production efficiency of the fuel pressure valve and improving the economic benefit.

Description

Detection device and method for self-adaptive fuel pressure valves with different specifications
Technical Field
The invention relates to the technical field of fuel pressure valve detection, in particular to a detection device and a detection method for self-adaptive fuel pressure valves with different specifications.
Background
The fuel pressure valve, called fuel pressure regulating valve, is regulated by fuel pressure, and is connected with air inlet manifold by means of vacuum tube, and is controlled by vacuum negative pressure to make the air inlet manifold negative pressure be raised, and if the engine is idle, its rotating speed is low, throttle valve opening degree is small, fuel consumption is low, and the diaphragm of fuel pressure regulator can be driven to make fuel pressure relief opening be raised, and can make fuel pressure be reduced, fuel oil return be raised, and if it is high-speed, its rotating speed is high, throttle valve opening degree is large, and air inlet manifold negative pressure is reduced, and the regulating diaphragm of fuel pressure regulator is close to closed state, fuel pressure is raised so as to provide the high-speed engine with more fuel requirements for fuel.
The existing fuel pressure valve is required to be inspected and tested before leaving the factory, and the fuel pressure valve can be put into use after the test result is qualified, but the fuel pressure valve has different specifications according to actual requirements, and the fuel pressure valve with different specifications is complicated in detection. Currently, a large number of enterprises still use manual methods to detect the fuel pressure valve, but the manual methods for detecting the fuel pressure valve have the following defects:
1. the manual detection requires manual adjustment of the pressure of the fuel pressure valve, so that the problems of incomplete test, error and the like are easily solved;
2. the manual detection needs a great deal of manpower, and the test efficiency is low;
aiming at the situation, development of a detection device for self-adapting fuel pressure valves with different specifications is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a detection device and a detection method for self-adaptive fuel pressure valves with different specifications.
The aim of the invention is achieved by the following technical scheme:
the detection device for the self-adaptive fuel pressure valves with different specifications comprises a rack and a containing plate fixedly arranged on the rack, wherein a containing groove for containing the fuel pressure valve is formed in the containing plate, and an oil outlet end of the fuel pressure valve penetrates through the containing groove and extends to the outside of the containing groove; the two sides of the fuel pressure valve are provided with positioning components which are fixedly arranged on the accommodating plate and used for positioning the fuel pressure valve, and a control component which is fixedly arranged on the frame and used for controlling the pretightening force of the fuel pressure valve is arranged above the fuel pressure valve; and a detection assembly for detecting the oil outlet end of the fuel pressure valve is further arranged on the frame.
Preferably, the positioning assembly at least comprises a supporting block fixedly arranged at the bottom of the accommodating plate, a compressing cylinder is fixedly arranged on the supporting block, a cylinder shaft of the compressing cylinder penetrates through the accommodating plate and is fixedly connected with the compressing claw, and the compressing claw can be pressed on the connecting ring of the fuel pressure valve.
Preferably, the control assembly at least comprises a guide rail fixedly arranged on the frame, a sliding block capable of sliding on the guide rail is arranged on the guide rail, a connecting plate is fixedly arranged on the sliding block, a punching head is arranged on the connecting plate, and the punching head can be pressed on the upper surface of the fuel pressure valve.
Preferably, the connecting plate is connected with the punching head through a pressure sensor.
Preferably, the control assembly further comprises an electric cylinder fixedly arranged on the frame, and a cylinder shaft of the electric cylinder is fixedly connected with the connecting plate.
Preferably, the detection assembly at least comprises a jacking cylinder fixedly arranged on the supporting block, a sliding seat is fixedly arranged on a cylinder shaft of the jacking cylinder, an oil outlet and an oil inlet are arranged on the sliding seat, the oil inlet is communicated with an oil inlet of the fuel pressure valve, and the oil outlet is communicated with an overflow port of the fuel pressure valve.
Preferably, the sliding seat at least comprises a first part and a second part at least partially sleeved on the first part, the oil inlet is arranged on the second part, the oil outlet is arranged on the first part, and the oil outlet is communicated with the overflow port of the fuel pressure valve through a bypass cavity arranged on the first part; the first part and the second part are connected through a spring, and a first sealing ring is further arranged between the inner walls of the first part and the second part.
Preferably, a second sealing ring is further arranged at the joint of the sliding seat and the fuel pressure valve.
A detection method of a self-adaptive fuel pressure valve with different specifications comprises the following steps:
s1, placing a fuel pressure valve in a containing groove of a containing plate, and driving a pressing claw of a pressing cylinder arranged on a supporting block to press on a connecting ring of the fuel pressure valve to finish positioning the fuel pressure valve;
s2, an electric cylinder arranged on the frame drives a stamping head fixedly arranged on the connecting plate to move downwards through the connecting plate and presses the stamping head to the upper surface of the fuel pressure valve, so that the limit of the fuel pressure valve is completed;
s3, after the step S2 is completed, driving the sliding seat to move by the jacking cylinder until an oil inlet on the sliding seat is communicated with an oil inlet of the fuel pressure valve, and an oil outlet on the sliding seat is communicated with an overflow port of the fuel pressure valve;
and S4, after the step S3 is finished, the test device can be communicated with the oil inlet and the oil outlet of the sliding seat through other test devices, so that the detection is finished.
The beneficial effects of the invention are mainly as follows:
1. the structure is simple, the design is exquisite, the workload of fuel pressure valve testers is reduced, the production efficiency of the fuel pressure valve is greatly improved, and the economic benefit is improved;
2. the arrangement of the detection assembly can enable the detection assembly to be self-adaptive to the detection of fuel pressure valves with different specifications, and has wider applicability;
3. the setting of control assembly can realize accurate control to the cracking pressure of fuel valve, improves the yields of fuel pressure valve.
Drawings
The technical scheme of the invention is further described below with reference to the accompanying drawings:
fig. 1: the structure of the fuel pressure valve is schematically shown in the invention;
fig. 2: the structure of the invention is a three-dimensional structure diagram;
fig. 3: front view of the invention;
fig. 4: A-A in FIG. 3;
fig. 5: an enlarged view of section a in fig. 4.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present invention, and structural, methodological, or functional modifications of the invention from those skilled in the art are included within the scope of the invention.
As shown in fig. 1 to 5, the invention discloses a detection device for self-adaptive fuel pressure valves with different specifications, which comprises a frame 1 and a containing plate 2 fixedly arranged on the frame 1, wherein a containing groove for containing a fuel pressure valve 100 is arranged on the containing plate 2, and the outer contour of the containing groove is matched with the outer contour of the fuel pressure valve 100 so as to limit the outer contour of the fuel pressure valve. The oil outlet 101 of the fuel pressure valve 100 penetrates the accommodating groove and extends outside the accommodating groove, so as to detect the oil outlet 101 of the fuel pressure valve 100, and the oil outlet lengths of the fuel pressure valves with different specifications are different.
In the present invention, positioning components 3 fixed on the accommodating plate 2 for positioning the fuel pressure valve 100 are disposed on two sides of the fuel pressure valve 100, specifically, the positioning components 3 at least include a supporting block 31 fixed on the bottom of the accommodating plate 2, a compressing cylinder 32 is fixed on the supporting block 31, a cylinder shaft of the compressing cylinder 32 penetrates through the accommodating plate 2 and is fixedly connected with a compressing claw 33, and the compressing claw 33 can be pressed on a connecting ring 102 of the fuel pressure valve 100.
The upper part of the fuel pressure valve 100 is provided with a control component 4 which is fixedly arranged on the frame 1 and used for controlling the pretightening force of the fuel pressure valve 100, the control component 4 at least comprises a guide rail 41 which is fixedly arranged on the frame 1, the guide rail 41 is provided with a sliding block 42 which can slide on the guide rail, the sliding block 42 is fixedly provided with a connecting plate 43, the connecting plate 43 is driven by an electric cylinder 46 arranged on the frame 1, the connecting plate 43 is provided with a punching head 44, and the punching head 44 can be pressed on the upper surface of the fuel pressure valve 100. Further, the connecting plate 43 is connected with the stamping head 44 through the pressure sensor 45, and the arrangement of the pressure sensor 45 can avoid accidental damage of the fuel pressure valve caused by overlarge pretightening force, so that the yield is improved.
The design key point of the invention is as follows: the frame 1 is further provided with a detection assembly 5 for detecting the oil outlet 101 of the fuel pressure valve 100, specifically, the detection assembly 5 at least comprises a jacking cylinder 51 fixedly arranged on the supporting block 31, a sliding seat 52 is fixedly arranged on a cylinder shaft of the jacking cylinder 51, an oil outlet 53 and an oil inlet 54 are arranged on the sliding seat 52, the oil inlet 54 is communicated with the oil inlet 103 of the fuel pressure valve 100, and the oil outlet 53 is communicated with an overflow port 104 of the fuel pressure valve 100.
In the present invention, the sliding seat 52 at least includes a first portion 55 and a second portion 56 at least partially sleeved on the first portion 55, the oil inlet 54 is disposed on the second portion 56, the oil outlet 53 is disposed on the first portion 55, and the oil outlet 53 is communicated with the overflow port 104 of the fuel pressure valve 100 through a bypass cavity disposed on the first portion 55; the first part 55 and the second part 56 are connected through a spring 57, and the first part 56 and the second part 55 can relatively move up and down under the action of the spring 57 so as to achieve detection of fuel pressure valves with different specifications, so that the method has wider applicability.
Further, a first sealing ring 58 is further disposed between the inner walls of the first portion 55 and the second portion 56, and a second sealing ring 59 is further disposed at a connection portion between the slide seat 52 and the fuel pressure valve 100. The arrangement of the first sealing ring 58 and the second sealing ring 59 can ensure the cleanliness of the interior of the fuel pressure valve and the accuracy of detection.
The following briefly describes a detection method for the self-adaptive fuel pressure valves with different specifications, which comprises the following steps:
s1, placing a fuel pressure valve 100 in a containing groove of a containing plate 2, and driving a pressing claw 33 by a pressing cylinder 32 arranged on a supporting block 31 to press on a connecting ring 102 of the fuel pressure valve 100 to finish positioning the fuel pressure valve 100;
s2, an electric cylinder 46 arranged on the frame 1 drives a stamping head 44 fixedly arranged on the connecting plate 43 to move downwards through the connecting plate 43 and presses the upper surface of the fuel pressure valve 100 to finish limiting the fuel pressure valve 100;
s3, after the step S2 is completed, at the moment, the jacking cylinder 51 drives the sliding seat 52 to move until an oil inlet 54 on the sliding seat 52 is communicated with an oil inlet 103 of the fuel pressure valve 100, and an oil outlet 53 on the sliding seat 52 is communicated with an overflow port 104 of the fuel pressure valve 100;
and S4, after the step S3 is finished, the test device can be communicated with the oil inlet 54 and the oil outlet 53 of the sliding seat 52 through other test devices, so that the detection is finished.
The beneficial effects of the invention are mainly as follows:
1. the structure is simple, the design is exquisite, the workload of fuel pressure valve testers is reduced, the production efficiency of the fuel pressure valve is greatly improved, and the economic benefit is improved;
2. the arrangement of the detection assembly can enable the detection assembly to be self-adaptive to the detection of fuel pressure valves with different specifications, and has wider applicability;
3. the setting of control assembly can realize accurate control to the cracking pressure of fuel valve, improves the yields of fuel pressure valve.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (7)

1. Detection device of different specification fuel pressure valves of self-adaptation, its characterized in that: the device comprises a frame (1) and a containing plate (2) fixedly arranged on the frame (1), wherein a containing groove for containing a fuel pressure valve (100) is formed in the containing plate (2), and an oil outlet end (101) of the fuel pressure valve (100) penetrates through the containing groove and extends to the outside of the containing groove; the two sides of the fuel pressure valve (100) are provided with positioning components (3) fixedly arranged on the accommodating plate (2) for positioning the fuel pressure valve (100), and a control component (4) fixedly arranged on the frame (1) for controlling the pretightening force of the fuel pressure valve (100) is arranged above the fuel pressure valve (100); the frame (1) is also provided with a detection component (5) for detecting an oil outlet end (101) of the fuel pressure valve (100); the positioning assembly (3) comprises a supporting block (31) fixedly arranged at the bottom of the accommodating plate (2), the detection assembly (5) at least comprises a jacking cylinder (51) fixedly arranged on the supporting block (31), a sliding seat (52) is fixedly arranged on a cylinder shaft of the jacking cylinder (51), an oil outlet (53) and an oil inlet (54) are arranged on the sliding seat (52), the oil inlet (54) is communicated with an oil inlet (103) of the fuel pressure valve (100), and the oil outlet (53) is communicated with an overflow port (104) of the fuel pressure valve (100); the sliding seat (52) at least comprises a first part (55) and a second part (56) at least partially sleeved on the first part (55), the oil inlet (54) is arranged on the second part (56), the oil outlet (53) is arranged on the first part (55), and the oil outlet (53) is communicated with an overflow port (104) of the fuel pressure valve (100) through a bypass cavity arranged on the first part (55); the first part (55) and the second part (56) are connected through a spring (57), and a first sealing ring (58) is further arranged between the inner walls of the first part (55) and the second part (56).
2. The device for detecting the fuel pressure valve with the self-adaption to different specifications according to claim 1, wherein: the supporting block (31) is fixedly provided with a pressing cylinder (32), a cylinder shaft of the pressing cylinder (32) penetrates through the accommodating plate (2) and is fixedly connected with the pressing claw (33), and the pressing claw (33) can be pressed on the connecting ring (102) of the fuel pressure valve (100).
3. The device for detecting the fuel pressure valve with the self-adaption to different specifications according to claim 1, wherein: the control assembly (4) at least comprises a guide rail (41) fixedly arranged on the frame (1), a sliding block (42) capable of sliding on the guide rail (41) is arranged on the guide rail, a connecting plate (43) is fixedly arranged on the sliding block (42), a punching head (44) is arranged on the connecting plate (43), and the punching head (44) can be pressed on the upper surface of the fuel pressure valve (100).
4. A device for detecting a fuel pressure valve of different specifications according to claim 3, wherein: the connecting plate (43) is connected with the punching head (44) through a pressure sensor (45).
5. The device for detecting the fuel pressure valve with the self-adapting different specifications according to claim 4, wherein: the control assembly (4) further comprises an electric cylinder (46) fixedly arranged on the frame (1), and a driving shaft of the electric cylinder (46) is fixedly connected with the connecting plate (43).
6. The device for detecting the fuel pressure valve with the self-adaption to different specifications according to claim 1, wherein: the connecting part of the sliding seat (52) and the fuel pressure valve (100) is also provided with a second sealing ring (59).
7. The detection method of the detection device for the self-adaptive fuel pressure valves with different specifications according to claim 1, wherein the detection method comprises the following steps: the method comprises the following steps:
s1, placing a fuel pressure valve (100) in a containing groove of a containing plate (2), and driving a pressing claw (33) by a pressing cylinder (32) arranged on a supporting block (31) to press on a connecting ring (102) of the fuel pressure valve (100) so as to position the fuel pressure valve (100);
s2, an electric cylinder (46) arranged on the frame (1) drives a stamping head (44) fixedly arranged on the connecting plate (43) to move downwards through the connecting plate (43), and presses the stamping head to the upper surface of the fuel pressure valve (100) to limit the fuel pressure valve (100);
s3, after the step S2 is completed, at the moment, the jacking cylinder (51) drives the sliding seat (52) to move until an oil inlet (54) on the sliding seat (52) is communicated with an oil inlet (103) of the fuel pressure valve (100), an oil outlet (53) on the sliding seat (52) is communicated with an overflow port (104) of the fuel pressure valve (100),
and S4, after the step S3 is finished, the test device can be communicated with an oil inlet (54) and an oil outlet (53) of the sliding seat (52) through other test devices, so that the detection is finished.
CN201811008133.8A 2018-08-31 2018-08-31 Detection device and method for self-adaptive fuel pressure valves with different specifications Active CN109029964B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811008133.8A CN109029964B (en) 2018-08-31 2018-08-31 Detection device and method for self-adaptive fuel pressure valves with different specifications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811008133.8A CN109029964B (en) 2018-08-31 2018-08-31 Detection device and method for self-adaptive fuel pressure valves with different specifications

Publications (2)

Publication Number Publication Date
CN109029964A CN109029964A (en) 2018-12-18
CN109029964B true CN109029964B (en) 2023-12-15

Family

ID=64625859

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811008133.8A Active CN109029964B (en) 2018-08-31 2018-08-31 Detection device and method for self-adaptive fuel pressure valves with different specifications

Country Status (1)

Country Link
CN (1) CN109029964B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372159A (en) * 1993-08-31 1994-12-13 Bjork Investment Group, Inc. Engine fuel flow control mechanism
CN101930231A (en) * 2010-08-27 2010-12-29 武汉航达航空科技发展有限公司 Test device of fuel controller
CN203811368U (en) * 2014-04-09 2014-09-03 浙江汇润电气有限公司 Electronic injection fuel pump pressure valve test and adjustment tool
CN206503980U (en) * 2017-02-27 2017-09-19 安徽江淮汽车集团股份有限公司 A kind of vehicle fuel pressure regulator valve
CN206531636U (en) * 2017-03-02 2017-09-29 温州汇润机电有限公司 A kind of test device for fuel pressure valve
CN209014271U (en) * 2018-08-31 2019-06-21 吉测(苏州)测试系统有限公司 The detection device of adaptive different size fuel pressure valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372159A (en) * 1993-08-31 1994-12-13 Bjork Investment Group, Inc. Engine fuel flow control mechanism
CN101930231A (en) * 2010-08-27 2010-12-29 武汉航达航空科技发展有限公司 Test device of fuel controller
CN203811368U (en) * 2014-04-09 2014-09-03 浙江汇润电气有限公司 Electronic injection fuel pump pressure valve test and adjustment tool
CN206503980U (en) * 2017-02-27 2017-09-19 安徽江淮汽车集团股份有限公司 A kind of vehicle fuel pressure regulator valve
CN206531636U (en) * 2017-03-02 2017-09-29 温州汇润机电有限公司 A kind of test device for fuel pressure valve
CN209014271U (en) * 2018-08-31 2019-06-21 吉测(苏州)测试系统有限公司 The detection device of adaptive different size fuel pressure valve

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
新型燃油压力调节阀设计与试验;靳淑军;章茂森;程红晖;胡军;陶国庆;王剑;黄健;;流体机械(10);第10-13页 *
汽车燃油泵阀门性能自动检测台设计;汪芳;;装备制造技术(12);第40-42页 *

Also Published As

Publication number Publication date
CN109029964A (en) 2018-12-18

Similar Documents

Publication Publication Date Title
CN105537903B (en) Four-way pipe end cap feeding riveting mechanism
CN106956123B (en) A kind of highly compatible valve oil seal automation press-loading apparatus
CN103862270A (en) Press fitting mechanism for automatic measurement riveting machine of plunger steel ball
CN104895871A (en) Comprehensive and energy-saving testing device and method for reliability of electromagnetic valves and hydraulic cylinders
CN104117839A (en) Engine intake manifold iron bush pressing and assembling device
CN106312514A (en) Installation tool for filtering net of oil pump
CN109029964B (en) Detection device and method for self-adaptive fuel pressure valves with different specifications
CN108458834B (en) Engine manifold assembly test line and test method
CN203156672U (en) Iron bush press fitting device for engine intake manifold
CN204831720U (en) Internal -combustion engine valve leakproofness detection device
CN209014271U (en) The detection device of adaptive different size fuel pressure valve
CN201439164U (en) Press mounting device of cylinder liner of engine
CN103048100A (en) Full-automatic detection equipment for valve tightness of automobile engine cylinder head
CN109139319A (en) A kind of common-rail injector
CN205989293U (en) The press-loading apparatus of cam Simmer ring pressing machine
CN208467709U (en) A kind of multistation speed change box clutch general assembly device
CN204988653U (en) Leak hunting machine
CN201716190U (en) On-line detection mechanism for exhaust pressure of engine
CN204461717U (en) Diesel motor hydraulic leading apparatus performance test apparatus
CN212095161U (en) Automatic rocker arm mounting device for meter
CN209542105U (en) Pilot system
CN211121832U (en) Dry type automatic leakage detector for diesel engine body
CN212693180U (en) Test equipment for testing sealing performance of cavity
CN203791958U (en) Press mounting mechanism for automatically measuring riveting press for plunger steel balls
CN208636039U (en) A kind of inlet and outlet closure mechanism for testing of engine cold test equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant