CN110574700A - Livestock farm feeding device - Google Patents

Livestock farm feeding device Download PDF

Info

Publication number
CN110574700A
CN110574700A CN201910901018.1A CN201910901018A CN110574700A CN 110574700 A CN110574700 A CN 110574700A CN 201910901018 A CN201910901018 A CN 201910901018A CN 110574700 A CN110574700 A CN 110574700A
Authority
CN
China
Prior art keywords
feeding
bin
feed
rotating shaft
base
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.)
Pending
Application number
CN201910901018.1A
Other languages
Chinese (zh)
Inventor
周海忠
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.)
Changxing Zhongyi Foundry General Partnership
Original Assignee
Changxing Zhongyi Foundry General Partnership
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 Changxing Zhongyi Foundry General Partnership filed Critical Changxing Zhongyi Foundry General Partnership
Priority to CN201910901018.1A priority Critical patent/CN110574700A/en
Publication of CN110574700A publication Critical patent/CN110574700A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K39/00Feeding or drinking appliances for poultry or other birds
    • A01K39/01Feeding devices, e.g. chainfeeders
    • A01K39/012Feeding devices, e.g. chainfeeders filling automatically, e.g. by gravity from a reserve
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K5/00Feeding devices for stock or game ; Feeding wagons; Feeding stacks
    • A01K5/02Automatic devices

Abstract

The invention discloses a feeding device for a livestock farm, which belongs to the technical field of livestock feeding and comprises a base, wherein a feeding bin is arranged on one side of the top of the base, a hopper is arranged on the top of the feeding bin, a feeding bin is arranged on one side of the feeding bin, a discharging bin is arranged on the top end of one side of the feeding bin, a supporting frame is arranged at the bottom of the feeding bin, a motor is arranged on the top of the supporting frame, and the output end of the motor is rotatably connected with a first rotating shaft. According to the invention, the first rotating shaft and the first roller wheel are driven to rotate by the motor, so that the second roller wheel and the second rotating shaft are driven to rotate under the action of the belt, and the helical blade pushes the feed in the feeding bin spirally upwards, thereby not only facilitating the feed to be conveyed to the discharging bin, but also avoiding the extrusion of the feed, and meanwhile, the helical blade plays a certain stirring role on the feed, thereby avoiding the accumulation and extrusion of the feed, and further reducing the working difficulty to a certain extent.

Description

livestock farm feeding device
Technical Field
The invention relates to the technical field of livestock feeding, in particular to a feeding device for a livestock farm.
background
The livestock centralized feeding field with a certain number is divided into a cattle farm, a pig farm, a chicken farm, a rabbit farm, a sheep farm, a horse farm and the like according to the types of livestock, the animal husbandry is greatly promoted along with the development of economy, and in order to reduce labor cost and human resources, mechanization (feeding devices) is generally adopted to replace manual operation, so that semi-automatic feeding is realized.
However current feed device is realizing automatic feeding's in-process, make partial fodder pile up easily, thereby make only small part fodder transported to the fodder mouth, however remaining fodder need rely on external force (manpower) with its propelling movement to the feed inlet, and the in-process of propelling movement makes the fodder extrusion easily, pile up, thereby reduce edible taste, and increased the degree of difficulty of work to a certain extent, and current feed device is at the in-process of clearance, can not make the feeding groove overturn according to certain angle, thereby make the clearance comparatively inconvenient, and increased the degree of difficulty of clearance.
disclosure of Invention
The invention aims to: in order to solve current device of eating of feeding at the in-process that realizes automatic feeding, make partial fodder pile up easily to make only a small part fodder transported to the fodder mouth, nevertheless remaining fodder need rely on external force (manpower) with its propelling movement to feed inlet, and the in-process of propelling movement makes the fodder extrusion, piles up easily, thereby reduce edible taste, and increased the problem of the degree of difficulty of work to a certain extent, provide a device is fed in the livestock farm.
In order to achieve the purpose, the invention provides the following technical scheme: a feeding device for a livestock farm comprises a base, wherein a feeding bin is arranged on one side of the top of the base, a hopper is arranged on the top of the feeding bin, a feeding bin is arranged on one side of the feeding bin, a discharging bin is arranged on the top of one side of the feeding bin, a supporting frame is arranged at the bottom of the feeding bin, a motor is mounted at the top of the supporting frame, a first rotating shaft is rotatably connected to the output end of the motor, a first roller is arranged on the outer side of the first rotating shaft, a second rotating shaft penetrating through to the top end of the interior of the feeding bin is arranged on one side of the top of the base, a second roller is arranged at the bottom end of the outer side of the second rotating shaft, the bottom end of the interior of the feeding bin inclines downwards, a plurality of groups of helical blades are uniformly arranged on the outer side of the second rotating shaft, a discharging pipe is arranged at the bottom of, the bottom of hose is provided with feeding groove, the both ends of feeding groove bottom one side are provided with the bracing piece, the both ends that bracing piece one side was kept away from to the bottom of feeding groove all install electric putter, electric putter's top and bottom all are provided with first round pin axle.
Preferably, the top and the bottom of the two groups of electric push rods are respectively and rotationally connected with the feeding groove and the base through first pin shafts, and the rotation angle of the electric push rods with the first pin shafts as base points is 0-90 degrees.
Preferably, a rotating shaft is arranged at the top of the supporting rod, the feeding trough is rotatably connected with the supporting rod through the rotating shaft, and the rotating angle of the feeding trough with the rotating shaft as a base point is 0-90 degrees.
Preferably, the top and the bottom of the electric telescopic rod are both provided with a second pin shaft, the electric telescopic rod is respectively connected with the storage bin and the hose in a rotating manner through the second pin shaft, and the rotating angle of the electric telescopic rod with the second pin shaft as a base point is 0-45 degrees.
Preferably, the bottom of the blanking pipe is provided with a connecting piece, and the blanking pipe is connected with a hose through a connecting piece thread.
Preferably, lead to the inside top of feed bin and the top of base and all be provided with the bearing frame, and the inside of bearing frame all is provided with the bearing, the top and the bottom of second pivot all through mutually supporting of bearing frame and bearing with lead to feed bin and base rotation and be connected.
Preferably, lead to the top of feed bin one side and be provided with the discharge gate, and lead to the feed bin and pass through discharge gate and feed bin intercommunication.
Preferably, the bottom of feeding storehouse one side is provided with the feed inlet, the feeding storehouse passes through the feed inlet and leads to the feed bin intercommunication.
Preferably, the diameter of the first roller is twice that of the second roller, the first roller is rotatably connected with the second roller through a belt, and the second roller is located below the material passing bin.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the feed led into the feeding bin is centralized on the right side through the inclined plane at the bottom end inside the feeding bin, then the first rotating shaft and the first roller are driven to rotate through the motor, so that the second roller and the second rotating shaft are driven to rotate under the action of the belt, and the feed in the feeding bin is spirally and upwards pushed by the spiral blade, so that the feed is conveniently conveyed to the discharging bin, the extrusion of the feed is avoided, meanwhile, the spiral blade plays a certain stirring role on the feed, the accumulation and extrusion of the feed are avoided, the working difficulty is reduced to a certain extent, the feeding trough is pushed by the electric push rod to turn rightwards by taking the rotating shaft as a base point, the feeding trough is conveniently cleaned by water directly, and the cleaning difficulty is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial schematic view of the present invention;
FIG. 3 is a schematic view of the construction of the feeding trough of the present invention;
FIG. 4 is a schematic structural view of the electric putter of the present invention;
Fig. 5 is an enlarged view of the present invention a.
In the figure: 1. a base; 2. a feeding bin; 3. a hopper; 4. a feed inlet; 5. a support frame; 6. a motor; 7. a first rotating shaft; 8. a first roller; 9. a second rotating shaft; 10. a second roller; 11. feeding a bin; 12. a helical blade; 13. discharging a bin; 14. a discharge port; 15. a discharging pipe; 16. a connecting member; 17. a hose; 18. an electric telescopic rod; 19. a feeding trough; 20. a support bar; 21. a rotating shaft; 22. an electric push rod; 23. a first pin shaft; 24. and a second pin shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The motor (model number is TC7122), the electric telescopic rod (model number is HB-DJ806) and the electric push rod (model number is DTW) mentioned in the invention can be obtained by market or private ordering.
Referring to fig. 1-5, a feeding device for a livestock farm comprises a base 1, a feeding bin 2 is arranged on one side of the top of the base 1, a hopper 3 is arranged on the top of the feeding bin 2, a feeding bin 11 is arranged on one side of the feeding bin 2, a discharging bin 13 is arranged on the top of one side of the feeding bin 11, a support frame 5 is arranged at the bottom of the feeding bin 2, a motor 6 is mounted on the top of the support frame 5, a first rotating shaft 7 is rotatably connected to the output end of the motor 6, a first roller 8 is arranged on the outer side of the first rotating shaft 7, a second rotating shaft 9 penetrating to the top of the inner part of the feeding bin 11 is arranged on one side of the top of the base 1, a second roller 10 is arranged at the bottom of the outer side of the second rotating shaft 9, the bottom 45 degrees of the inner part of the feeding bin 2, a plurality of helical blades 12 are uniformly arranged on the outer, lead to intermediate position department of feed bin 11 one side to install electric telescopic handle 18, the bottom of hose 17 is provided with feeding groove 19, and the both ends of feeding groove 19 bottom one side are provided with bracing piece 20, and electric putter 22 is all installed at the both ends that bracing piece 20 one side was kept away from to feeding groove 19's bottom, and electric putter 22's top and bottom all are provided with first round pin axle 23.
According to the invention, the motor 6 drives the first rotating shaft 7 and the first roller 8 to rotate, so that the second roller 10 and the second rotating shaft 9 are driven to rotate under the action of the belt, and the helical blades 12 are used for pushing the feed in the feeding bin 2 spirally upwards, so that the feed is conveniently conveyed to the discharging bin 13, the extrusion of the feed is avoided, meanwhile, the helical blades 12 play a certain stirring role on the feed, the stacking and extrusion of the feed are avoided, and the difficulty of work is reduced to a certain extent.
Please refer to fig. 1, 3 and 4, the top and bottom of the two sets of electric pushing rods 22 are respectively connected with the feeding trough 19 and the base 1 by the first pin 23, and the rotation angle of the electric pushing rods 22 with the first pin 23 as the base point is 0-90 °, the top of the supporting rod 20 is provided with a rotation shaft 21, the feeding trough 19 is connected with the supporting rod 20 by the rotation shaft 21, and the rotation angle of the feeding trough 19 with the rotation shaft 21 as the base point is 0-90 °.
This device is fed in animal farm has reduced the frictional force of electric putter 22 rotation in-process through first round pin axle 23, makes electric putter 22's result of use better, and when feeding trough 19 and rotatory with axis of rotation 21, corresponding slope need be made to electric putter 22 to utilize first round pin axle 23 to play the effect of support to electric putter 22's slope, thereby improved rate of utilization and stability.
Please refer to fig. 1 and 5, the top and the bottom of the electric telescopic rod 18 are both provided with a second pin shaft 24, the electric telescopic rod 18 is respectively connected with the bin 11 and the hose 17 through the second pin shaft 24 in a rotating manner, the rotation angle of the electric telescopic rod 18 with the second pin shaft 24 as a base point is 0 to 45 degrees, the bottom of the feeding pipe 15 is provided with a connecting piece 16, and the feeding pipe 15 is connected with the hose 17 through the connecting piece 16 by threads.
This device is fed in animal farm makes electric telescopic handle 18 and leads to feed bin 11 and hose 17 to rotate through second round pin axle 24 and is connected, thereby frictional force has been reduced, and better extension or the length that shortens 18 output ends of electric telescopic handle, change the regulation of buckling to hose 17, when the length of 18 output ends of electric telescopic handle is longer, hose 17 buckles to the right, and the range of buckling is great, when the length of 18 output ends of electric telescopic handle is shorter, hose 17 buckles the range less, and be convenient for change hose 17 through the connecting piece 16 that sets up (utilize the screw thread to rotate hose 17 from connecting piece 16 and get off).
Please refer to fig. 1, bearing seats are disposed on the top of the bin 11 and the top of the base 1, bearings are disposed in the bearing seats, the top and the bottom of the second rotating shaft 9 are rotatably connected to the bin 11 and the base 1 through the mutual cooperation of the bearing seats and the bearings, a discharge port 14 is disposed on the top of one side of the bin 11, and the bin 11 is communicated with the lower bin 13 through the discharge port 14.
This device is fed in animal farm and eats through mutually supporting of bearing frame and bearing, makes the rotation effect of second pivot 9 better, and rotates more laborsavingly, and will pass through the inside of leading-in feed bin 13 down of feed bin 11 through discharge gate 14 to the degree of difficulty of work has been reduced, and has improved work efficiency.
Please refer to fig. 1 and 2, a feeding opening 4 is disposed at a bottom end of one side of the feeding bin 2, the feeding bin 2 is communicated with a material passing bin 11 through the feeding opening 4, a diameter of the first roller 8 is twice as large as a diameter of the second roller 10, the first roller 8 is rotatably connected with the second roller 10 through a belt, and the second roller 10 is located below the material passing bin 11.
This device is eaten to livestock farm feeding is convenient for carry out the propelling movement through helical blade 12 through feed inlet 4 and is shifted the fodder to reduced the degree of difficulty of work, and improved work efficiency, and be the twice of second gyro wheel 10 diameter through the diameter that makes first gyro wheel 8, thereby make second gyro wheel 10 rotate with the rotational speed of twice, thereby make this kind feed the use of eating the device more laborsaving, and the result of use is better.
The working principle is as follows: when in use, the power supply is switched on, firstly, the feed is guided into the feeding bin 2 through the hopper 3, then the feed is centralized at the right end of the feeding bin 2 through the slope at the bottom end inside the feeding bin 2, then the motor 6 drives the first rotating shaft 7 to rotate, thereby driving the first roller 8 to rotate, and driving the second roller 10 and the second rotating shaft 9 to rotate under the action of the belt, thereby driving the helical blade 12 to rotate, meanwhile, the feed inside the feeding bin 2 is subject to helical feeding through the helical blade (the distance between the outer side of the helical blade 12 and the inner wall of the feeding bin 11 is small, and the feed can be stirred in the process of helical feeding, thereby avoiding feed accumulation), then the feed falls into the discharging bin 13 through the discharging port 14 on the feeding bin 11, then the valve on the discharging tube 15 is opened, so that the feed falls into the feeding groove 19 through the discharging tube 15 and the hose 17 (the valve on the discharging tube 15 does not need to be closed under the ordinary feeding condition, after the fodder is piled up in the feeding trough 19, the lower end of the hose 17 is blocked by the piled fodder, so that the fodder in the lower feed bin 13 can not be discharged, after the fodder in the feeding trough 19 is eaten by livestock, the bottom end of the hose 17 is not blocked, so that the fodder in the lower feed bin 13 can be automatically discharged, the difficulty of the feeding work is reduced, and only a power supply needs to be turned on for a certain time to store a certain amount of fodder in the lower feed bin 13 each time, so that the power supply cost is reduced, when the feeding trough 19 needs to be cleaned, firstly, the electric telescopic rod 18 pushes the hose 17 to incline rightwards by taking the connecting piece 16 as a base point, so that a certain distance is generated between the hose 17 and the feeding trough 19, then, the electric push rod 22 pushes the feeding trough 19 to rotate by taking the rotating shaft 21 as a base point, so that the feeding trough 19 inclines rightwards, and then the feeding trough is washed by an external water source, thereby reducing the difficulty of cleaning.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The utility model provides a device is fed in animal farm, includes base (1), its characterized in that: a feeding bin (2) is arranged on one side of the top of the base (1), a hopper (3) is arranged on the top of the feeding bin (2), a feeding bin (11) is arranged on one side of the feeding bin (2), a lower bin (13) is arranged on the top of one side of the feeding bin (11), a support frame (5) is arranged at the bottom of the feeding bin (2), a motor (6) is installed at the top of the support frame (5), a first rotating shaft (7) is rotatably connected to the output end of the motor (6), a first roller (8) is arranged on the outer side of the first rotating shaft (7), a second rotating shaft (9) penetrating through the top end of the inner portion of the feeding bin (11) is arranged on one side of the top of the base (1), a second roller (10) is arranged at the bottom of the outer side of the second rotating shaft (9), a bottom end of the inner portion of the feeding bin (2) is 45 degrees downward sloping, and a plurality, the bottom of feed bin (13) is provided with unloading pipe (15) down, hose (17) that the bottom of unloading pipe (15) set up, lead to intermediate position department of feed bin (11) one side and install electric telescopic handle (18), the bottom of hose (17) is provided with feeding groove (19), the both ends of feeding groove (19) bottom one side are provided with bracing piece (20), electric putter (22) are all installed at the both ends of bracing piece (20) one side are kept away from to the bottom of feeding groove (19), the top and the bottom of electric putter (22) all are provided with first round pin axle (23).
2. A farm feeding apparatus according to claim 1, wherein: the tops and the bottoms of the two groups of electric push rods (22) are respectively and rotatably connected with the feeding groove (19) and the base (1) through a first pin shaft (23), and the rotation angle of the electric push rods (22) with the first pin shaft (23) as a base point is 0-90 degrees.
3. A farm feeding apparatus according to claim 1, wherein: the top of the supporting rod (20) is provided with a rotating shaft (21), the feeding groove (19) is rotatably connected with the supporting rod (20) through the rotating shaft (21), and the rotating angle of the feeding groove (19) with the rotating shaft (21) as a base point is 0-90 degrees.
4. A farm feeding apparatus according to claim 1, wherein: the top and the bottom of the electric telescopic rod (18) are both provided with second pin shafts (24), the electric telescopic rod (18) is respectively connected with the storage bin (11) and the hose (17) in a rotating mode through the second pin shafts (24), and the rotating angle of the electric telescopic rod (18) with the second pin shafts (24) as base points is 0-45 degrees.
5. A farm feeding apparatus according to claim 1, wherein: the bottom of the discharging pipe (15) is provided with a connecting piece (16), and the discharging pipe (15) is connected with a hose (17) through the connecting piece (16) in a threaded manner.
6. A farm feeding apparatus according to claim 1, wherein: lead to the top of feed bin (11) inside and the top of base (1) and all be provided with the bearing frame, and the inside of bearing frame all is provided with the bearing, the top and the bottom of second pivot (9) all through mutually supporting of bearing frame and bearing with lead to feed bin (11) and base (1) and rotate and be connected.
7. A farm feeding apparatus according to claim 1, wherein: lead to the top of feed bin (11) one side and be provided with discharge gate (14), and lead to feed bin (11) and feed bin (13) intercommunication down through discharge gate (14).
8. A farm feeding apparatus according to claim 1, wherein: the bottom of feeding storehouse (2) one side is provided with feed inlet (4), feeding storehouse (2) are through feed inlet (4) and logical feed bin (11) intercommunication.
9. A farm feeding apparatus according to claim 1, wherein: the diameter of the first roller (8) is twice that of the second roller (10), the first roller (8) is rotatably connected with the second roller (10) through a belt, and the second roller (10) is located below the material passing bin (11).
CN201910901018.1A 2019-09-23 2019-09-23 Livestock farm feeding device Pending CN110574700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910901018.1A CN110574700A (en) 2019-09-23 2019-09-23 Livestock farm feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910901018.1A CN110574700A (en) 2019-09-23 2019-09-23 Livestock farm feeding device

Publications (1)

Publication Number Publication Date
CN110574700A true CN110574700A (en) 2019-12-17

Family

ID=68813383

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910901018.1A Pending CN110574700A (en) 2019-09-23 2019-09-23 Livestock farm feeding device

Country Status (1)

Country Link
CN (1) CN110574700A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112514821A (en) * 2020-12-08 2021-03-19 江西省昌铄农业开发有限公司 Seasonal multi-yield auxiliary system for poultry
CN114431162A (en) * 2022-03-15 2022-05-06 重庆富余源环保科技有限公司 Individual independent feeding machine for large livestock breeding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112514821A (en) * 2020-12-08 2021-03-19 江西省昌铄农业开发有限公司 Seasonal multi-yield auxiliary system for poultry
CN114431162A (en) * 2022-03-15 2022-05-06 重庆富余源环保科技有限公司 Individual independent feeding machine for large livestock breeding

Similar Documents

Publication Publication Date Title
CN110074033B (en) Automatic device of puting in of pond fodder
CN110574700A (en) Livestock farm feeding device
CN110775544B (en) Automatic adjust fodder processing of pushing away material and feed rate is with preventing stifled transitional device
CN203279647U (en) Self-propelled feeding machine
CN205105966U (en) Take cowboying of automatic feeding device to feed food device
CN212381897U (en) Feeding device for poultry
CN204682184U (en) A kind of fodder thrower used for aquiculture
CN210445284U (en) Blanking device
CN111034636A (en) Can control feed delivery device of volume of puting in
CN205105965U (en) Cowboying is fed and is eaten device
CN208273887U (en) A kind of cultivation chicken automatic charging equipment
CN206390022U (en) A kind of homogeneous device for feeding fish bait
CN213668848U (en) A even compounding device of raw materials for granule
CN210707982U (en) Canning machine is used in production of nutrition powder
CN206949190U (en) Pet feeding device protection against the tide, rabbling mechanism and its feeding apparatus
CN207235740U (en) A kind of beef cattle breeding Novel cattle shed
CN206985205U (en) A kind of material stores material transfering device
CN205213777U (en) Novel automatic fodder of intelligence is supplied with device
CN216363106U (en) Feeding device for large-scale breeding of dairy cows
CN216314804U (en) A cascaded fodder feeding pipe device for raising chickens
CN210113917U (en) Plant is with fodder device of throwing something and feeding
CN217117210U (en) Livestock-raising is with equipment of throwing something and feeding
CN218370592U (en) Automatic blowing device of fodder
CN210944976U (en) Flocculating agent intermittent adding and mixing device for water treatment equipment
CN212138827U (en) Feed delivery device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20191217

WD01 Invention patent application deemed withdrawn after publication