CN113586928B - Oil pump - Google Patents

Oil pump Download PDF

Info

Publication number
CN113586928B
CN113586928B CN202110889168.2A CN202110889168A CN113586928B CN 113586928 B CN113586928 B CN 113586928B CN 202110889168 A CN202110889168 A CN 202110889168A CN 113586928 B CN113586928 B CN 113586928B
Authority
CN
China
Prior art keywords
oil
pump
groove
hole
cavity
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
CN202110889168.2A
Other languages
Chinese (zh)
Other versions
CN113586928A (en
Inventor
李燕莉
金正良
田中伟
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.)
Changsha Topsflo Pump Technology Co ltd
Original Assignee
Changsha Topsflo Pump Technology 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 Changsha Topsflo Pump Technology Co ltd filed Critical Changsha Topsflo Pump Technology Co ltd
Priority to CN202110889168.2A priority Critical patent/CN113586928B/en
Publication of CN113586928A publication Critical patent/CN113586928A/en
Application granted granted Critical
Publication of CN113586928B publication Critical patent/CN113586928B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/20—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N23/00—Special adaptations of check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2210/00—Applications
    • F16N2210/04—Vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2270/00—Controlling
    • F16N2270/20—Amount of lubricant

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

The invention discloses an oil pump, which comprises a pump body, wherein a pump cavity with an opening at the left end is arranged in the pump body, the section of the pump cavity is circular, a pump cover is fixedly arranged at the left end of the pump body, a rotor body is rotatably connected between the pump cover and the right end of the pump cavity and is positioned at the eccentric position of the pump cavity, a driven rotor is rotatably connected in the pump cavity, and seven inner grooves are formed in the side wall of an inner ring of the driven rotor; the rotor comprises a rotor body and is characterized in that a mounting groove is formed in the rotor body, six radial sliding grooves are formed in the rotor body, and a convex block is connected to each radial sliding groove in a sliding manner; an adjusting component is arranged in the mounting groove; the right end of the rotor body is provided with a rotating shaft extending out of the pump body in an extending manner; an oil suction cavity and an oil discharge cavity are formed in the pump cavity; an oil suction groove and an oil discharge groove are arranged in the pump body, and the pump body is provided with an oil suction hole and an oil discharge hole; the oil pump is simple in structure, and can control the intermittent operation of the oil pump according to the pressure in the oil flow passage, so that the energy consumption is saved.

Description

Oil pump
Technical Field
The invention relates to the technical field of oil pumps, in particular to a variable oil pump.
Background
With the development of science and technology and the improvement of living standard of people, the automobile has been moved into thousands of households, becomes the most important vehicle for people to go out in daily life, and the oil pump is an important part of the automobile and is directly driven by an engine, so that the oil is forced to be sent to a moving part of an internal combustion engine from an oil sump to lubricate the moving part. In the prior art, the oil pump is directly driven by the engine, so that when the rotating speed of the engine is increased, the flow of the oil pump is increased along with the increase of the rotating speed of the engine, so that the oil pressure in an oil flow passage of the engine is increased, the oil temperature is increased, and the lubricating effect is further influenced; because the engine oil pumped by the engine oil pump is useless, the effective power of the engine is consumed more, and the engine is more oil-consuming.
Disclosure of Invention
The invention aims to provide an oil pump which is simple in structure and can control the oil pump variable according to the pressure in an oil flow passage, so that the energy consumption is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: an oil pump comprises a pump body, wherein a pump cavity with an opening at the left end is arranged in the pump body, the cross section of the pump cavity is circular, a pump cover is fixedly arranged at the opening of the pump cavity at the left end of the pump body, a rotor body is rotatably connected between the pump cover and the right end of the pump cavity and is positioned at the eccentric position of the pump cavity, a driven rotor is rotatably connected in the pump cavity, and seven inner grooves are uniformly formed in the side wall of an inner ring of the driven rotor at intervals along the circumferential direction; the rotor comprises a rotor body and is characterized in that mounting grooves are formed in the rotor body, six radial sliding grooves communicated with the mounting grooves are uniformly formed in the rotor body at intervals along the circumferential direction, and a convex block matched with the inner groove is connected in each radial sliding groove in a sliding manner; an adjusting component connected with the six bumps is arranged in the mounting groove; a rotating shaft extending out of the pump body is arranged at the right end of the rotor body in an extending manner; an oil suction cavity and an oil discharge cavity are respectively formed in the front side and the rear side of the rotor body in the pump cavity; the pump comprises a pump body and is characterized in that an oil suction groove communicated with an oil suction cavity and an oil discharge groove communicated with an oil discharge cavity are arranged in the pump body, an oil suction hole communicated with the oil suction groove is formed in the front side of the pump body, an oil discharge hole communicated with the oil discharge groove is formed in the rear side of the pump body, and an oil discharge one-way valve is arranged between the oil discharge groove and the oil discharge hole in the pump body.
Furthermore, when the oil pressure at the oil discharge hole is smaller than a set value, the adjusting assembly controls the six convex blocks to extend out of the radial sliding grooves; when the oil pressure at the oil discharge hole is not less than a set value, the adjusting assembly controls the six convex blocks to retract into the radial sliding grooves.
Furthermore, the adjusting assembly comprises a control shaft, shaft holes with openings at the left ends are formed in the rotor body and the rotating shaft along the radial direction of the rotating shaft, a slotted hole communicated with the oil suction groove is formed in the left end of the shaft hole in the pump cover, and the control shaft is connected in the shaft hole in a sliding mode along the axial direction of the rotating shaft; a first spring is arranged in the slotted hole and is positioned between the left end of the slotted hole and the left end of the control shaft for forcing the control shaft to move right; six connecting rods are uniformly hinged to the control shaft at intervals along the axial direction on the outer side of the circumference of the mounting groove, and the other ends of the six connecting rods are respectively hinged to the corresponding convex blocks; and a right cavity is formed between the right end of the control shaft and the right end of the shaft hole in the shaft hole, and the right cavity is communicated with the oil discharge hole.
Furthermore, when the oil pressure in the oil discharge hole is smaller than a set value, the control shaft moves rightwards to the right end position, and the control shaft pushes the bump to extend out of the radial sliding groove through the connecting rod; when the oil pressure in the oil discharge hole is not less than a set value, the control shaft moves leftwards to the left end position, and the control shaft pulls the lug to retract into the radial sliding groove through the connecting rod.
Furthermore, a communicating groove is formed in the position, right opposite to the oil absorption groove, of the right end face of the pump cover, and a first through hole for communicating the groove hole with the communicating groove is formed in the pump cover.
Furthermore, a second through hole used for communicating the oil suction hole and the oil suction groove is formed in the pump body.
Furthermore, an annular cutting groove communicated with the oil discharge hole is formed in the outer side of the rotating shaft in the pump body, and a communicating hole used for communicating the annular cutting groove with the right cavity is formed in the rotating shaft; and a third through hole for communicating the oil discharge hole with the annular cutting groove is formed in the pump body.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the control shaft is used for comparing the pressure in the engine oil flow passage, namely the oil pressure at the oil discharge hole with the pressure at the oil suction hole of the engine oil pump of the automobile, when the pressure in the engine oil flow passage is not less than a set value, the control shaft moves leftwards, the control bump retracts into the radial sliding groove, the discharge capacity of the engine oil pump is reduced, the purpose of variable quantity is realized, and the energy consumption is saved;
2. the control shaft is used for controlling the lug to move in the radial sliding groove through the connecting rod, so that the oil suction groove and the oil discharge groove of the oil pump are communicated, the displacement of the oil pump is controlled, and simplicity and effectiveness are achieved;
3. through the mode of using the control shaft and the first spring to cooperate and control the oil pump, electric control is not needed, and the method is simple and effective and saves cost.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2 in accordance with the present invention;
FIG. 4 is a cross-sectional view of the present invention with a failed oil pump;
fig. 5 isbase:Sub>A sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 4 in accordance with the present invention.
Detailed Description
Referring to fig. 1-5, an oil pump includes a pump body 1, a pump cavity 101 with an opening at a left end is arranged in the pump body 1, a cross section of the pump cavity 101 is circular, a pump cover 2 is fixedly arranged at the opening of the pump cavity 101 at the left end of the pump body 1, a rotor body 3 is rotatably connected between the pump cover 2 and the right end of the pump cavity 101, the rotor body 3 is located at an eccentric position of the pump cavity 101, a driven rotor 5 is rotatably connected in the pump cavity 101, and seven inner grooves 51 are uniformly arranged on the inner ring side wall of the driven rotor 5 along the circumferential direction at intervals; the rotor body 3 is internally provided with mounting grooves 31, six radial sliding grooves 32 communicated with the mounting grooves 31 are uniformly arranged in the rotor body 3 at intervals along the circumferential direction, and each radial sliding groove 32 is internally connected with a convex block 4 matched with an inner groove 51 in a sliding manner; an adjusting component connected with six convex blocks 4 is arranged in the mounting groove 31; a rotating shaft 3a extending out of the pump body 1 is arranged at the right end of the rotor body 3 in an extending manner; an oil suction chamber 5a and an oil discharge chamber 5b are respectively formed in the pump chamber 101 at the front and rear sides of the rotor body 3; an oil suction groove 1c communicated with the oil suction cavity 5a and an oil discharge groove 1d communicated with the oil discharge cavity 5b are arranged in the pump body 1, an oil suction hole 111 communicated with the oil suction groove 1c is arranged on the front side of the pump body 1, an oil discharge hole 112 communicated with the oil discharge groove 1d is arranged on the rear side of the pump body 1, and an oil discharge one-way valve 9 is arranged between the oil discharge groove 1d and the oil discharge hole 112 of the pump body 1; when the oil pressure at the oil discharge hole 112 is smaller than a set value, the adjusting assembly controls the six lugs 4 to extend out of the radial sliding grooves 32; when the oil pressure at the oil discharge hole 112 is not less than the set value, the adjusting assembly controls the six lugs 4 to retract into the radial sliding grooves 32.
The adjusting assembly comprises a control shaft 6, a shaft hole 33 with an opening at the left end is arranged in the rotor body 3 and the rotating shaft 3a along the radial direction of the rotating shaft 3a, a slotted hole 6b communicated with the oil suction groove 1c is arranged at the left end of the shaft hole 33 in the pump cover 2, and the control shaft 6 is connected in the shaft hole 33 in a sliding manner along the axial direction of the rotating shaft 3a; a first spring 8 is arranged in the slotted hole 6b, and the first spring 8 is positioned between the left end of the slotted hole 6b and the left end of the control shaft 6 and used for forcing the control shaft 6 to move rightwards; the control shaft 6 is uniformly hinged with six connecting rods 7 at intervals along the axial direction at the outer side of the circumference of the mounting groove 31, and the other ends of the six connecting rods 7 are respectively hinged with the corresponding convex blocks 4; a right chamber 6a is formed in the shaft hole 33 between the right end of the control shaft 6 and the right end of the shaft hole 33, the right chamber 6a communicating with the oil drain hole 112; when the oil pressure in the oil discharge hole 112 is smaller than a set value, the control shaft 6 moves rightwards to the right end position, and the control shaft 6 pushes the lug 4 to extend out of the radial sliding groove 32 through the connecting rod 7; when the oil pressure in the oil discharge hole 112 is not less than the set value, the control shaft 6 moves to the left end position, and the control shaft 6 pulls the protrusion 4 through the connecting rod 7 to retract into the radial chute 32.
The right end face of the pump cover 2 is provided with a communicating groove 2b opposite to the oil absorption groove 1c, and the pump cover 2 is internally provided with a first through hole 2a communicating groove hole 6b and the communicating groove 2 b. The pump body 1 is provided with a second through hole 1e for communicating the oil suction hole 111 and the oil suction groove 1 c. An annular cutting groove 1a communicated with the oil discharge hole 112 is formed in the outer side of the rotating shaft 3a in the pump body 1, and a communication hole 3c used for communicating the annular cutting groove 1a with the right chamber 6a is formed in the rotating shaft 3a; and a third through hole 1b for communicating the oil discharge hole 112 with the circular cutting groove 1a is formed in the pump body 1.
As shown in fig. 1, as the initial state of the present invention, when the engine driving shaft starts to rotate, the rotating shaft 3a is driven to rotate, so that the rotor body 3 rotates, and the driven rotor 5 is matched with the rotor assembly (shown in fig. 2) formed by the rotor body 3 and the projection 4, so that the engine oil pump works, at this time, because the pressure at the oil discharge hole 112 is lower and less than the set value, the control shaft 6 is kept at the right end position shown in fig. 1, 2 and 3, at this time, the oil suction cavity 5a is increased, the oil discharge cavity 5b is decreased, the engine oil enters the oil suction cavity 5a of the engine oil pump from the oil suction hole 111 through the second through hole 1e and the oil suction groove 1c, and is discharged out of the oil discharge hole 112 through the oil discharge cavity 5b, the oil discharge groove 1d and the oil discharge check valve 9 by the rotation and pressurization of the engine oil flow passage, so as to lubricate automobile parts.
When the pressure at the oil discharge hole 112 is increased and is not less than the set value when the engine speed is increased, the engine oil enters the right chamber 6a through the third through hole 1b, the circular cutting groove 1a and the communicating hole 3c, the control shaft 6 is pushed to move leftwards to the left end position shown in fig. 4 by overcoming the first spring 8, and the engine oil in the groove hole 6b enters the oil suction chamber 5a through the first through hole 2a and the communicating groove 2b and is connected with the oil suction hole 111; the control shaft 6 is hinged with the lug 4 through the connecting rod 7, so that when the control shaft 6 moves leftwards, the lug 4 is pulled through the connecting rod 7 to move to a state shown in figures 4 and 5, at the moment, the communication area of the oil suction cavity 5a and the oil discharge cavity 5b is gradually increased, the displacement of the oil pump is reduced, and the oil at the oil discharge hole 112 cannot flow backwards due to the oil discharge one-way valve 9; when the pressure in the engine oil flow passage is reduced again, the control shaft 6 moves rightwards again under the action of the first spring 8 to reset, the displacement of the engine oil pump is controlled to be increased, the pressure in the engine oil flow passage (at the oil discharge hole 112) is increased again, and circulation is formed; and the oil pump reduces the displacement when the rotating speed of the engine is increased, thereby saving energy consumption.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (4)

1. An oil pump comprises a pump body, wherein a pump cavity with an opening at the left end is arranged in the pump body, and the cross section of the pump cavity is circular; the rotor comprises a rotor body and is characterized in that mounting grooves are formed in the rotor body, six radial sliding grooves communicated with the mounting grooves are uniformly formed in the rotor body at intervals along the circumferential direction, and a convex block matched with the inner groove is connected in each radial sliding groove in a sliding manner; an adjusting component connected with the six convex blocks is arranged in the mounting groove; the right end of the rotor body is provided with a rotating shaft extending out of the pump body in an extending manner; an oil suction cavity and an oil discharge cavity are respectively formed in the front side and the rear side of the rotor body in the pump cavity; an oil suction groove communicated with the oil suction cavity and an oil discharge groove communicated with the oil discharge cavity are formed in the pump body, an oil suction hole communicated with the oil suction groove is formed in the front side of the pump body, an oil discharge hole communicated with the oil discharge groove is formed in the rear side of the pump body, and an oil discharge one-way valve is arranged between the oil discharge groove and the oil discharge hole in the pump body; when the oil pressure at the oil discharge hole is smaller than a set value, the adjusting assembly controls the six convex blocks to extend out of the radial sliding groove; when the oil pressure at the oil discharge hole is not less than a set value, the adjusting assembly controls the six bumps to retract into the radial sliding grooves;
the adjusting assembly comprises a control shaft, shaft holes with openings at the left ends are formed in the rotor body and the rotating shaft along the radial direction of the rotating shaft, a slotted hole communicated with the oil suction groove is formed in the left end of the shaft hole in the pump cover, and the control shaft is connected in the shaft holes in a sliding mode along the axial direction of the rotating shaft; a first spring is arranged in the slotted hole and is positioned between the left end of the slotted hole and the left end of the control shaft for forcing the control shaft to move rightwards; six connecting rods are uniformly hinged to the control shaft at intervals along the axial direction on the outer side of the circumference of the mounting groove, and the other ends of the six connecting rods are respectively hinged to the corresponding convex blocks; a right cavity is formed between the right end of the control shaft and the right end of the shaft hole in the shaft hole and is communicated with the oil discharge hole;
when the oil pressure in the oil discharge hole is smaller than a set value, the control shaft moves rightwards to the right end position, and the control shaft pushes the convex block to extend out of the radial sliding groove through the connecting rod; when the oil pressure in the oil discharge hole is not less than a set value, the control shaft moves leftwards to the left end position, and the control shaft pulls the lug to retract into the radial sliding groove through the connecting rod.
2. The oil pump of claim 1, wherein a communication groove is formed in the right end face of the pump cover opposite to the oil suction groove, and a first through hole for communicating the groove hole and the communication groove is formed in the pump cover.
3. The oil pump of claim 2, wherein a second through hole is provided in the pump body for communicating the oil suction hole and the oil suction groove.
4. The oil pump according to claim 3, wherein an annular cutting groove communicated with the oil discharge hole is formed in the pump body on the outer side of a rotating shaft, and a communication hole for communicating the annular cutting groove with the right chamber is formed in the rotating shaft; and a third through hole for communicating the oil discharge hole with the annular cutting groove is formed in the pump body.
CN202110889168.2A 2021-08-04 2021-08-04 Oil pump Active CN113586928B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110889168.2A CN113586928B (en) 2021-08-04 2021-08-04 Oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110889168.2A CN113586928B (en) 2021-08-04 2021-08-04 Oil pump

Publications (2)

Publication Number Publication Date
CN113586928A CN113586928A (en) 2021-11-02
CN113586928B true CN113586928B (en) 2023-03-28

Family

ID=78254734

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110889168.2A Active CN113586928B (en) 2021-08-04 2021-08-04 Oil pump

Country Status (1)

Country Link
CN (1) CN113586928B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7674095B2 (en) * 2000-12-12 2010-03-09 Borgwarner Inc. Variable displacement vane pump with variable target regulator
DE102015002352A1 (en) * 2014-12-17 2016-06-23 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Electric oil pump, in particular for a motor vehicle
CN112283102A (en) * 2020-10-07 2021-01-29 李军 Plunger pump

Also Published As

Publication number Publication date
CN113586928A (en) 2021-11-02

Similar Documents

Publication Publication Date Title
CN103270304B (en) Oil pump
CN1274960C (en) Scroll compressor
US4505655A (en) Vane pump with positioning pins for cam ring and side plates
JP4342647B2 (en) Back pressure groove structure of variable displacement vane pump
US7195467B2 (en) Internal gear machine with variable capacity
US4604041A (en) Rotary vane pump
CN113586928B (en) Oil pump
CN202125717U (en) NSE type rotor oil pump
CN100374723C (en) Fuel supply apparatus
CN113374691B (en) Energy-saving vacuum pump for automobile
JP2000073975A (en) Vacuum pump
CN209145856U (en) Double clutch automatic speed changing case oil pump
CN211950842U (en) Axial oil outlet cycloid pump capable of realizing self-fastening
CN220505300U (en) Integrated intercommunication check valve oil pump and new energy vehicle
CN208474099U (en) A kind of positive displacement high-pressure hydraulic pump with slide block structure
EP2935891B1 (en) Lubricant vane pump
CN212360169U (en) Oil pump of automobile engine
CN103335202A (en) Main pump of mechanical valve-controlled double-cavity variable-displacement vane type oil pump
CN219504693U (en) Electric hydraulic tool
JP4146164B2 (en) Piston type fluid machine
CN208474102U (en) A kind of positive displacement high-pressure hydraulic pump
CN110630490B (en) Vane pump
CN101639063B (en) Gear type oil pump
CN221800092U (en) External rotor of bidirectional cycloidal oil pump
CN113639180B (en) Automobile engine oil pump

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
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20230110

Address after: 410117 101, 102, Building 15, International Innovation City, No. 519, Zhenhua Road, Yuhua District, Changsha City, Hunan Province

Applicant after: CHANGSHA TOPSFLO PUMP TECHNOLOGY CO.,LTD.

Address before: 252000 No.1 Hunan Road, Dongchangfu District, Liaocheng City, Shandong Province

Applicant before: Li Yanli

GR01 Patent grant
GR01 Patent grant