CN104889117A - Cleaning machine adapting to PVC pipes of complex shapes - Google Patents

Cleaning machine adapting to PVC pipes of complex shapes Download PDF

Info

Publication number
CN104889117A
CN104889117A CN201510313002.0A CN201510313002A CN104889117A CN 104889117 A CN104889117 A CN 104889117A CN 201510313002 A CN201510313002 A CN 201510313002A CN 104889117 A CN104889117 A CN 104889117A
Authority
CN
China
Prior art keywords
fuselage
water
cylinder
clamping
fixedly mounted
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
CN201510313002.0A
Other languages
Chinese (zh)
Inventor
龙道勤
程久松
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.)
Rich Pipe Co Ltd In Anhui
Original Assignee
Rich Pipe Co Ltd In Anhui
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 Rich Pipe Co Ltd In Anhui filed Critical Rich Pipe Co Ltd In Anhui
Priority to CN201510313002.0A priority Critical patent/CN104889117A/en
Publication of CN104889117A publication Critical patent/CN104889117A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/023Cleaning the external surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027Cleaning the internal surfaces; Removal of blockages
    • B08B9/032Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0323Arrangements specially designed for simultaneous and parallel cleaning of a plurality of conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)

Abstract

The invention relates to the field of pipe cleaning equipment, and specifically relates to a cleaning machine adapting to PVC pipes of complex shapes. The cleaning machine comprises a machine body, a clamping device, an outputting device, and a water-spraying device, the machine body is integrally a cube structure, the clamping device penetrates through the machine body, the outputting device is positioned at the right side of the machine body, the water-spraying device is positioned at the right side of the machine body, the clamping device comprises a clamping motor, a screw rod, a clamping disc, and a clamping end, the clamping device is used for clamping one ends of a plurality of pipes, a top disc for supporting the clamping end is movable, the outputting device comprises pillars, horizontal plates, and rotating cylinders, during operation, the other ends of the pipes are arranged in the rotating cylinders, and the rotating cylinders can rotate, the water-spraying device comprises a water pump, a water-pumping pipe, a water-outlet pipe, and nozzles, and during operation, the water pump transports water to the nozzles so that the pipes can be cleaned. According to the cleaning machine, the plurality of pipes of complex types can be cleaned at one time, the equipment is simple, and the cleaning efficiency is higher.

Description

A kind of cleaning machine adapting to complicated shape pvc pipe
Technical field
The present invention relates to tubing cleaning equipment field, specifically a kind of cleaning machine adapting to complicated shape pvc pipe.
Background technology
Along with the propelling of social and economic construction, PVC obtains to be applied more and more widely.PVC is in the process of processing, tubing can different phase can owing to contacting with equipment part, the reason such as friction and produce chip or dust, and make the dirty or sticky ash of the outer wall of PVC due to the greasy dirt problem on tubing raw material storage environment problem and equipment component in the final products stage, affect product appearance quality.Therefore, need to clean tubing.
And existing tubing cleaning machine, much all can only clean straight tube, there is equipment component can clean bend pipe, but equipment is complicated, and once cannot clean many bend pipes, cleaning efficiency is lower, Given this, now be badly in need of a kind of equipment simple, once can clean the tubing cleaning machine of many complicated shape tubing, i.e. a kind of cleaning machine adapting to complicated shape pvc pipe
Summary of the invention
In order to make up the deficiencies in the prior art, the invention provides a kind of cleaning machine adapting to complicated shape pvc pipe, it compensate for prior art bend pipe cleaning equipment complexity and once cannot clean many bend pipes, the defect that cleaning efficiency is low.
The technical solution adopted for the present invention to solve the technical problems is: a kind of cleaning machine adapting to complicated shape pvc pipe, comprise fuselage, clamping device, output device and water injector, described fuselage entirety is cube structure, described clamping device runs through fuselage, described output device is positioned on the right side of fuselage, and described water injector is positioned on the right side of fuselage.
Described fuselage interior is provided with aqua storage tank, is provided with rectangular aperture on the right side of back, is provided with leaking hole on the left of rectangular aperture, and during work, a water part for water injector ejection enters aqua storage tank from rectangular aperture, and a part enters aqua storage tank through leaking hole.
Described clamping device comprises clamping motor, leading screw, clamp circle disk and bare terminal end, described clamping motor is fixedly mounted in the middle part of fuselage upper surface, described leading screw is fixedly mounted on fuselage, and be connected mutually by shaft coupling with clamping motor, during work, clamping electric machine rotation drives screw turns, described clamp circle disk comprises " convex " shape chassis and " Jiong " shape is taken over a business, described chassis outer wall with take over a business inwall and be provided with ball recess, chassis and be installed with ball between taking over a business, take over a business and be fixedly mounted on chassis upper by ball, thus take over a business and can rotate on chassis, chassis is provided with helicla flute in the middle part of lower surface, clamp circle disk is arranged on leading screw by helicla flute, during work, screw turns drives clamp circle disk to move forward and backward, described taking over a business on rear side of top is installed with bare terminal end, described bare terminal end comprises support plate, cylinder and grip block, described support plate comprises vertical plate and dividing plate, described dividing plate is fixedly mounted on vertical plate, and support plate is separated into five regions, thus this clamping device can clamp five tubing simultaneously, each region is all provided with a pair cylinder, and cylinder bottom is all fixedly mounted on two dividing plates, cylinder head is connected mutually with grip block, during work, every root tubing is positioned at each region, a pair cylinder stretches out, a pair grip block is contacted with the both sides of tubing one end respectively, thus clamping tubing, described grip block entirety is flat cube structure, and profile is waveform inside grip block, being designed to corrugated effect is make tubing be clamped more fastening.
Described output device comprises pillar, level board and rotating cylinder, described pillar has two, pillar is symmetricly set on the right side of fuselage along fuselage median plane, and be positioned at above leaking hole, two level boards are provided with above pillar, described rotating cylinder is the hollow cylinder of droping to the ground, and rotating cylinder is evenly provided with five between two level boards, the upper and lower both sides of rotating cylinder are provided with rotating shaft, between rotating shaft and level board, ball bearing is installed, thus rotating cylinder can rotate around the shaft, during work, tubing one end is fixed by clamping device, and the tubing other end is placed in rotating cylinder.
Described water injector comprises water pump, drinking-water pipe, outlet pipe and nozzle, described water pump is fixedly mounted on underbelly, and water pump one end is connected with aqua storage tank by drinking-water pipe, the water pump other end is connected with two level boards by outlet pipe, described nozzle is fixedly mounted on outlet pipe, and nozzle is evenly provided with nine along each level board, the shower nozzle of nozzle is all towards rotating cylinder, during work, water in aqua storage tank is extracted out by drinking-water pipe by water pump, spray after nozzle being delivered in water transport by outlet pipe, to clean the pvc pipe at rotating cylinder place.
A kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, it utilizes clamping device once to clamp five tubing, and it is movable to support taking over a business of tubing one end, the rotating cylinder supporting the tubing other end is movable, thus make the present invention can adapt to once to the cleaning of many complicated type tubing, the advantage of more traditional complicated tubing cleaning equipment is that equipment of the present invention is comparatively simple, and once cleans many tubing, and cleaning efficiency is higher.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of fuselage of the present invention, clamping motor and leading screw;
Fig. 3 is partial structurtes schematic diagram of the present invention;
Fig. 4 is side view of the present invention;
Fig. 5 is the structural representation of clamp circle disk of the present invention and bare terminal end;
Fig. 6 is the side view of clamp circle disk of the present invention and bare terminal end;
Fig. 7 is the partial schematic diagram of clamp circle disk of the present invention and bare terminal end.
In figure: fuselage 1, clamping device 2, output device 3, water injector 4, aqua storage tank 11, rectangular aperture 12, leaking hole 13, clamping motor 21, leading screw 22, clamp circle disk 23, bare terminal end 24, chassis 231, take over a business 232, ball 233, helicla flute 2311, support plate 241, cylinder 242, grip block 243, vertical plate 2411, dividing plate 2412, pillar 31, level board 32, rotating cylinder 33, water pump 41, drinking-water pipe 42, outlet pipe 43, nozzle 44.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
As shown in Figure 1, a kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, comprise fuselage 1, clamping device 2, output device 3 and water injector 4, described fuselage 1 entirety is cube structure, described clamping device 2 runs through fuselage 1, described output device 3 is positioned on the right side of fuselage 1, and described water injector 4 is positioned on the right side of fuselage 1.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, described fuselage 1 inside is provided with aqua storage tank 11, fuselage 1 upper right is provided with rectangular aperture 12, leaking hole 13 is provided with on the left of rectangular aperture 12, during work, the water part that water injector 4 sprays enters aqua storage tank 11 from rectangular aperture 12, and a part enters aqua storage tank 11 through leaking hole 13.
As Fig. 1, Fig. 5, shown in Fig. 6 and Fig. 7, a kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, described clamping device 2 comprises clamping motor 21, leading screw 22, clamp circle disk 23 and bare terminal end 24, described clamping motor 21 is fixedly mounted in the middle part of fuselage 1 upper surface, described leading screw 22 fixedly mounts on the fuselage 1, and be connected mutually by shaft coupling with clamping motor 21, during work, clamping motor 21 rotating band movable wire thick stick 22 rotates, described clamp circle disk 23 comprises " convex " shape chassis 231 and " Jiong " shape takes over a business 232, described chassis 231 outer wall with take over a business 232 inwalls and be provided with ball recess, chassis 231 and be installed with ball 233 between taking over a business 232, take over a business 232 and be fixedly mounted on top, chassis 231 by ball 233, thus take over a business 232 and can rotate on chassis 231, chassis 231 is provided with helicla flute 2311 in the middle part of lower surface, clamp circle disk 23 is arranged on leading screw 22 by helicla flute 2311, during work, leading screw 22 rotates and drives clamp circle disk 23 to move forward and backward, described taking over a business on rear side of 232 tops is installed with bare terminal end 24, described bare terminal end 24 comprises support plate 241, cylinder 242 and grip block 243, described support plate 241 comprises vertical plate 2411 and dividing plate 2412, described dividing plate 2412 is fixedly mounted on vertical plate 2411, and support plate 241 is separated into five regions, thus this clamping device 2 can clamp five tubing simultaneously, each region is all provided with a pair cylinder 242, and be all fixedly mounted on two dividing plates 2412 bottom cylinder 242, cylinder 242 top is connected mutually with grip block 243, during work, every root tubing is positioned at each region, a pair cylinder 242 stretches out, a pair grip block 243 is contacted with the both sides of tubing one end respectively, thus clamping tubing, described grip block 243 entirety is flat cube structure, and profile is waveform inside grip block 243, being designed to corrugated effect is make tubing be clamped more fastening.
As shown in figures 1 and 3, a kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, described output device 3 comprises pillar 31, level board 32 and rotating cylinder 33, described pillar 31 has two, pillar 31 is symmetricly set on the right side of fuselage 1 along fuselage 1 median plane, and be positioned at above leaking hole 13, two level boards 32 are provided with above pillar 31, the described hollow cylinder of rotating cylinder 33 for droping to the ground, and rotating cylinder 33 is evenly provided with five between two level boards 32, rotating cylinder about 33 both sides are provided with rotating shaft, between rotating shaft and level board 32, ball bearing is installed, thus rotating cylinder 33 can rotate around the shaft, during work, tubing one end is fixed by clamping device 2, the tubing other end is placed in rotating cylinder 33.
As Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, a kind of cleaning machine adapting to complicated shape pvc pipe of the present invention, described water injector 4 comprises water pump 41, drinking-water pipe 42, outlet pipe 43 and nozzle 44, described water pump 41 is fixedly mounted on fuselage 1 bottom, and water pump 41 one end is connected with aqua storage tank 11 by drinking-water pipe 42, water pump 41 other end is connected with two level boards 32 by outlet pipe 43, described nozzle 44 is fixedly mounted on outlet pipe 43, and nozzle 44 is evenly provided with nine along each level board 32, the shower nozzle of nozzle 44 is all towards rotating cylinder 33, during work, water in aqua storage tank 11 is extracted out by drinking-water pipe 42 by water pump 41, spray after nozzle 44 being delivered in water transport by outlet pipe 43, to clean the pvc pipe at rotating cylinder 33 place.
During work, the water pipe one end of the complicated shape needing cleaning is arranged on clamping device 2, in each region of the bare terminal end 24 of clamping device 2, a pair cylinder 242 stretches out, a pair grip block 243 contacts and the two sides of extrude tubes respectively, thus tubing one end is gripped, simultaneously, the tubing other end is placed in the rotating cylinder 33 of output device 3, clamp motor 21 afterwards to work, leading screw 22 drives clamp circle disk 23 to travel forward, simultaneously, water injector 4 works, water in aqua storage tank 11 is extracted out by drinking-water pipe 42 by water pump 41, spray after nozzle 44 being delivered in water transport by outlet pipe 43, to clean the pvc pipe at rotating cylinder 33 place, complex-shaped due to water pipe, so clamp circle disk 23 carry tubing proal time, take over a business 232 to rotate relative to chassis 231, and rotating cylinder 33 rotates around the shaft, and then clamp circle disk 23 take over a business 232 with rotating cylinder 33 can according to the Adjusting Shape of tubing self towards, thus the object reached the cleaning of complicated shape pvc pipe.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; description in above-described embodiment and description principle of the present invention is just described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (4)

1. one kind adapts to the cleaning machine of complicated shape pvc pipe, comprise fuselage (1), clamping device (2), output device (3) and water injector (4), it is characterized in that: described fuselage (1) entirety is cube structure, described clamping device (2) runs through fuselage (1), described output device (3) is positioned at fuselage (1) right side, described water injector (4) is positioned at fuselage (1) right side, wherein:
Described fuselage (1) inside is provided with aqua storage tank (11), and fuselage (1) upper right is provided with rectangular aperture (12), and rectangular aperture (12) left side is provided with leaking hole (13);
Described clamping device (2) comprises clamping motor (21), leading screw (22), clamp circle disk (23) and bare terminal end (24), described clamping motor (21) is fixedly mounted in the middle part of fuselage (1) upper surface, described leading screw (22) is fixedly mounted on fuselage (1), and be connected mutually by shaft coupling with clamping motor (21), described clamp circle disk (23) comprises " convex " shape chassis (231) and " Jiong " shape and takes over a business (232), described chassis (231) outer wall with take over a business (232) inwall and be provided with ball recess, chassis (231) and take over a business between (232) to be installed with ball (233), take over a business (232) and be fixedly mounted on chassis (231) top by ball (233), helicla flute (2311) is provided with in the middle part of chassis (231) lower surface, clamp circle disk (23) is arranged on leading screw (22) by helicla flute (2311), described taking over a business on rear side of (232) top is installed with bare terminal end (24), described bare terminal end (24) comprises support plate (241), cylinder (242) and grip block (243), described support plate (241) comprises vertical plate (2411) and dividing plate (2412), described dividing plate (2412) is fixedly mounted on vertical plate (2411), and support plate (241) is separated into five regions, each region is all provided with a pair cylinder (242), and cylinder (242) bottom is all fixedly mounted on two dividing plates (2412), cylinder (242) top is connected mutually with grip block (243), described grip block (243) entirety is flat cube structure.
2. a kind of cleaning machine adapting to complicated shape pvc pipe according to claim 1, it is characterized in that: described output device (3) comprises pillar (31), level board (32) and rotating cylinder (33), described pillar (31) has two, pillar (31) is symmetricly set on fuselage (1) right side along fuselage (1) median plane, and be positioned at leaking hole (13) top, pillar (31) top is provided with two level boards (32), described rotating cylinder (33) hollow cylinder for droping to the ground, and rotating cylinder (33) is evenly provided with five between two level boards (32), rotating cylinder (33) is provided with rotating shaft in both sides up and down, between rotating shaft and level board (32), ball bearing is installed.
3. a kind of cleaning machine adapting to complicated shape pvc pipe according to claim 1, it is characterized in that: described water injector (4) comprises water pump (41), drinking-water pipe (42), outlet pipe (43) and nozzle (44), described water pump (41) is fixedly mounted on fuselage (1) bottom, and water pump (41) one end is connected with aqua storage tank (11) by drinking-water pipe (42), water pump (41) other end is connected with two level boards (32) by outlet pipe (43), described nozzle (44) is fixedly mounted on outlet pipe (43), and nozzle (44) is evenly provided with nine along each level board (32), the shower nozzle of nozzle (44) is all towards rotating cylinder (33).
4. a kind of cleaning machine adapting to complicated shape pvc pipe according to claim 1, is characterized in that: described grip block (243) inner side profile is waveform.
CN201510313002.0A 2015-06-06 2015-06-06 Cleaning machine adapting to PVC pipes of complex shapes Pending CN104889117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510313002.0A CN104889117A (en) 2015-06-06 2015-06-06 Cleaning machine adapting to PVC pipes of complex shapes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510313002.0A CN104889117A (en) 2015-06-06 2015-06-06 Cleaning machine adapting to PVC pipes of complex shapes

Publications (1)

Publication Number Publication Date
CN104889117A true CN104889117A (en) 2015-09-09

Family

ID=54022313

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510313002.0A Pending CN104889117A (en) 2015-06-06 2015-06-06 Cleaning machine adapting to PVC pipes of complex shapes

Country Status (1)

Country Link
CN (1) CN104889117A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108568433A (en) * 2017-03-14 2018-09-25 天津巨龙暖通设备开发有限公司 A kind of steam heating pipe cleaning plant
CN112007187A (en) * 2020-09-08 2020-12-01 合肥同源化工科技有限公司 Method for manufacturing and processing food-grade silica gel product
CN113976502A (en) * 2021-11-10 2022-01-28 无锡银联齿轮传动机械有限公司 Cleaning machine for gear parts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033810A (en) * 1983-08-05 1985-02-21 Nippon Kokan Kk <Nkk> Cooling device for slab
JPH10249335A (en) * 1997-03-12 1998-09-22 Nippon Photo Sci:Kk Automatically cleaning mechanism for light transmitting tube of open-type photoirradiation device
CN103920677A (en) * 2014-04-16 2014-07-16 苏州美贝尔工业油品有限公司 Steel pipe cleaning device
CN103990628A (en) * 2014-04-24 2014-08-20 施密特汽车管件(安徽)有限公司 Automatic cleaning and drying device for automobile pipe fittings
CN204747003U (en) * 2015-06-06 2015-11-11 安徽的丰管业有限公司 Cleaning machine of adaptation complicated shape PVC pipe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033810A (en) * 1983-08-05 1985-02-21 Nippon Kokan Kk <Nkk> Cooling device for slab
JPH10249335A (en) * 1997-03-12 1998-09-22 Nippon Photo Sci:Kk Automatically cleaning mechanism for light transmitting tube of open-type photoirradiation device
CN103920677A (en) * 2014-04-16 2014-07-16 苏州美贝尔工业油品有限公司 Steel pipe cleaning device
CN103990628A (en) * 2014-04-24 2014-08-20 施密特汽车管件(安徽)有限公司 Automatic cleaning and drying device for automobile pipe fittings
CN204747003U (en) * 2015-06-06 2015-11-11 安徽的丰管业有限公司 Cleaning machine of adaptation complicated shape PVC pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108568433A (en) * 2017-03-14 2018-09-25 天津巨龙暖通设备开发有限公司 A kind of steam heating pipe cleaning plant
CN112007187A (en) * 2020-09-08 2020-12-01 合肥同源化工科技有限公司 Method for manufacturing and processing food-grade silica gel product
CN113976502A (en) * 2021-11-10 2022-01-28 无锡银联齿轮传动机械有限公司 Cleaning machine for gear parts

Similar Documents

Publication Publication Date Title
CN204747003U (en) Cleaning machine of adaptation complicated shape PVC pipe
CN204503679U (en) A kind of aluminium alloy sheet cleaning plant
CN104826826A (en) Circuit board cleaning device
CN210728596U (en) Ball sports goods cleaning device
CN104889117A (en) Cleaning machine adapting to PVC pipes of complex shapes
CN105564880A (en) Conveying device for potato chip production
CN203508240U (en) Self-rotation spray-head for wash tank
CN203764583U (en) Silk floss spraying and cleaning device
CN208482883U (en) A kind of thermoplastic articles cleaning device
CN204307895U (en) A kind of panel cleaning apparatus
CN204842308U (en) Spoke washs case fast
CN209109441U (en) A kind of spare tire cover plate production glue spraying tooling
CN205074316U (en) Glass cleaning drying device before coating film
CN208600265U (en) Solar energy halftone Rapid Cleaning line
CN203830371U (en) Multiple tube washing instrument
CN106391619A (en) Automatic pop can beverage can body washing device
CN206701834U (en) A kind of precision component surface cleaning apparatus
CN203764602U (en) Special-shaped copper belt cleaning and brushing device
CN202809253U (en) Spray cleaning device
CN109127580A (en) A kind of cleaning systems before metal plate plated film
CN211275099U (en) Painting device for computer case production
CN107413703A (en) A kind of auto parts and components production cleaning device
CN204157616U (en) A kind of apple shaddock automatic rinser
CN108067490A (en) A kind of scrubber
CN203803833U (en) Sea cucumber washing device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150909

WD01 Invention patent application deemed withdrawn after publication