CN105442861A - Method for restoring water leakage air face of toilet drainage pipeline - Google Patents

Method for restoring water leakage air face of toilet drainage pipeline Download PDF

Info

Publication number
CN105442861A
CN105442861A CN201510797952.5A CN201510797952A CN105442861A CN 105442861 A CN105442861 A CN 105442861A CN 201510797952 A CN201510797952 A CN 201510797952A CN 105442861 A CN105442861 A CN 105442861A
Authority
CN
China
Prior art keywords
annular groove
hole
drainage pipeline
water
gutter
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.)
Granted
Application number
CN201510797952.5A
Other languages
Chinese (zh)
Other versions
CN105442861B (en
Inventor
任生元
周文平
黄海鲲
马震宇
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.)
CHANGZHOU ARCHITECTURAL RESEARCH INSTITUTE Co Ltd
JIANGSU DINGDA BUILDING NEW TECHNOLOGY Co Ltd
Original Assignee
CHANGZHOU ARCHITECTURAL RESEARCH INSTITUTE Co Ltd
JIANGSU DINGDA BUILDING NEW 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 CHANGZHOU ARCHITECTURAL RESEARCH INSTITUTE Co Ltd, JIANGSU DINGDA BUILDING NEW TECHNOLOGY Co Ltd filed Critical CHANGZHOU ARCHITECTURAL RESEARCH INSTITUTE Co Ltd
Priority to CN201510797952.5A priority Critical patent/CN105442861B/en
Publication of CN105442861A publication Critical patent/CN105442861A/en
Application granted granted Critical
Publication of CN105442861B publication Critical patent/CN105442861B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203Arrangements for filling cracks or cavities in building constructions
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211Arrangements for filling cracks or cavities in building constructions using injection

Abstract

The invention discloses a method for restoring a water leakage air face of a toilet drainage pipeline. The method comprises the following specific steps that a, the joint of the drainage pipeline and a floor layer is observed, the hole filling, and grouting range around the drainage pipeline is determined, the periphery of the drainage pipeline is polished to form an annular concave face with the depth of 2 mm to 4 mm, and the periphery of the annular concave face needs to exceed the periphery of the hole filling and grouting range by 8 cm to 10 cm; b, an annular groove with an inverted-V-shaped section is formed in the floor layer around the drainage pipeline, the depth of the annular groove ranges from 1.5 cm to 2 cm, and the width of an opening of the annular groove ranges from 2 cm to 3 cm; c, the outer surface of the annular concave face and the outer surface of the annular groove are roughened and coated with an adhesion agent, and the annular concave face and the annular groove are filled with non-shrinkage polymer waterproof mortar; d, the outer surface of the filled position is coated with two layers of cement-based self-healing waterproof coating, and the thickness of each layer is about 1 mm to 2 mm. In this way, the influence of the method on the use function of a building is small, construction time is short, the influence on residents is small, and the leakage plugging effect is good.

Description

Drainage conduit of toilet percolating water back side restorative procedure
Technical field
The present invention relates to percolating water recovery technique field, particularly relate to a kind of drainage conduit of toilet percolating water back side restorative procedure.
Background technology
Washroom through-flooring gutter mainly contains two kinds of ways: 1, arrange rigid waterproof sleeve; 2, sleeve pipe is not set, adopts the mode of reserving hole, after Pipe installing is good, gives shutoff.No matter but which kind of way, after long-time, there is seepage in the place all likely contacted with concrete at gutter root, brings severe jamming to resident.
At present, resident runs into the situation that gutter leaks, and first it is envisioned that contacts resident family upstairs, allows it again do waterproof construction, but this method implements cumbersome sometimes; Next is exactly replace tubes, and this Measures compare is thorough, but construction intensity is large.
The application develops based on above background and a kind ofly directly carries out at gutter back side the method for repairing of leaking.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of drainage conduit of toilet percolating water back side restorative procedure, the method construction sequence is simple, must not destroy the such as Wall or floor tile surface layer of existing pipeline, waterproofing course and leveling layer etc., green construction, energy-conserving and environment-protective, little on the impact of building using function, the engineering time is short, little on resident family's impact, plugging effect is good.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of drainage conduit of toilet percolating water back side restorative procedure, described drainage pipe is adopt first reserving hole in construction and installation process, and the mode of laggard perform hole hole grout sealing carries out installing;
Described restorative procedure is repaired from back side, comprises following concrete steps:
A, observation gutter and floor layer junction, determine the filling-up hole grouting scope around gutter, and make a mark in the neighboring of filling-up hole grouting, it is the loop concave of 2 ~ 4mm that the floor layer of gutter surrounding polish a degree of depth, and the neighboring of described loop concave will exceed filling-up hole grouting neighboring 8 ~ 10cm;
B, on the floor layer of gutter surrounding, pick out a cross section be fall the annular groove of " V " font, and the degree of depth of described annular groove is 1.5 ~ 2cm, and A/F is 2 ~ 3cm;
C, roughening process is carried out to the external surface of loop concave and annular groove, then brushing interfacial agents, then adopt ungauged regions waterproof polymer mortar loop concave and annular groove to be filled and led up and tamp;
D, on the external surface tamping place apply 2 layers of cement based self-healing water-repellent paint, every thickness about 1 ~ 2mm.
In a preferred embodiment of the present invention, when being coated with water-repellent paint in steps d, square crossing between first floor coating and second layer coating.
In a preferred embodiment of the present invention, when being coated with water-repellent paint in steps d, water-repellent paint scope to stretch out 4 ~ 5cm from tamping outward flange.
The invention has the beneficial effects as follows: drainage conduit of toilet percolating water back side restorative procedure of the present invention, the method construction sequence is simple, must not destroy the such as Wall or floor tile surface layer of existing pipeline, waterproofing course and leveling layer etc., green construction, energy-conserving and environment-protective, little on the impact of building using function, the engineering time is short, little on resident family's impact, plugging effect is good.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the constructing structure schematic diagram of drainage conduit of toilet percolating water back side restorative procedure one of the present invention preferred embodiment.
In accompanying drawing, the mark of each parts is as follows: 1, gutter, and 2, floor layer, 3, loop concave, 4, annular groove, 5, filling-up hole grouting.
Detailed description of the invention
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Consult Fig. 1, the embodiment of the present invention comprises:
Embodiment one:
A kind of drainage conduit of toilet percolating water back side restorative procedure, described drainage pipe is adopt first reserving hole in construction and installation process, the mode of laggard perform hole hole grout sealing carries out installing, fill with concrete at hole place formwork to tamp during operation, owing to using for a long time and a variety of causes such as flooring vibrations, leaking easily appears in this place, for this type of percolating water:
Described restorative procedure is repaired from back side, comprises following concrete steps:
A, observation gutter 1 and floor layer 2 junction, determine the filling-up hole grouting scope around gutter, and make a mark in the neighboring of filling-up hole grouting 5, the floor layer of gutter surrounding polish the loop concave 3 that a degree of depth is 2mm, because the bonding surface that main leakage point is gutter and filling-up hole to be in the milk and filling-up hole are in the milk and floor layer concrete joint surface place, so the neighboring of loop concave will exceed filling-up hole grouting neighboring 8cm, extend on former floor layer concrete structure, guarantee repairing effect;
B, on the floor layer of gutter surrounding, pick out a cross section be fall the annular groove 4 of " V " font, and the degree of depth of described annular groove is 1.5cm, and A/F is 2cm;
C, roughening process is carried out to the external surface of loop concave and annular groove, then brushing interfacial agents, then adopt ungauged regions waterproof polymer mortar loop concave and annular groove to be filled and led up and tamp;
D, on the external surface tamping place apply 2 layers of cement based self-healing water-repellent paint, every thickness is about 1mm, be coated with water-repellent paint time, square crossing between first floor coating and second layer coating; In addition, when being coated with water-repellent paint, best water-repellent paint scope to stretch out 4cm from tamping outward flange, guarantees good waterproof effect.
Cement based self-healing water-repellent paint in the present embodiment adopts U.S. UGL particular function backwater pressure waterproof mildew resistant paint, this coating take cement as base material, mix with special acrylic acid series and auxiliary agent, there is superpower active material by carrier to concrete wall internal penetration, to react the crystalline solid being formed and be not soluted in water with hydrates such as the cement of inside concrete, blocking capillary channel, thus make concrete fine and close, waterproof, be equivalent to improve concrete seepage-resistant grade, intensity and thickness, improve concrete self-waterproof seepage capability, fundamentally prevent concrete from not occurring percolating water.
Embodiment two:
A kind of drainage conduit of toilet percolating water back side restorative procedure, described drainage pipe is adopt first reserving hole in construction and installation process, the mode of laggard perform hole hole grout sealing carries out installing, fill with concrete at hole place formwork to tamp during operation, owing to using for a long time and a variety of causes such as flooring vibrations, leaking easily appears in this place, for this type of percolating water:
Described restorative procedure is repaired from back side, comprises following concrete steps:
A, observation gutter and floor layer junction, determine the filling-up hole grouting scope around gutter, and make a mark in the neighboring of filling-up hole grouting, it is the loop concave of 3mm that the floor layer of gutter surrounding polish a degree of depth, because the bonding surface that main leakage point is gutter and filling-up hole to be in the milk and filling-up hole are in the milk and floor layer concrete joint surface place, so the neighboring of loop concave will exceed filling-up hole grouting neighboring 9cm, extend on former floor layer concrete structure, guarantee repairing effect;
B, on the floor layer of gutter surrounding, pick out a cross section be fall the annular groove of " V " font, and the degree of depth of described annular groove is 1.8cm, and A/F is 2.5cm;
C, roughening process is carried out to the external surface of loop concave and annular groove, then brushing interfacial agents, then adopt ungauged regions waterproof polymer mortar loop concave and annular groove to be filled and led up and tamp;
D, on the external surface tamping place apply 2 layers of cement based self-healing water-repellent paint, every thickness is about 1.5mm, be coated with water-repellent paint time, square crossing between first floor coating and second layer coating; In addition, when being coated with water-repellent paint, best water-repellent paint scope to stretch out 4.5cm from tamping outward flange, guarantees good waterproof effect.
Cement based self-healing water-repellent paint in the present embodiment adopts U.S. UGL particular function backwater pressure waterproof mildew resistant paint.
Embodiment three:
A kind of drainage conduit of toilet percolating water back side restorative procedure, described drainage pipe is adopt first reserving hole in construction and installation process, the mode of laggard perform hole hole grout sealing carries out installing, fill with concrete at hole place formwork to tamp during operation, owing to using for a long time and a variety of causes such as flooring vibrations, leaking easily appears in this place, for this type of percolating water:
Described restorative procedure is repaired from back side, comprises following concrete steps:
A, observation gutter and floor layer junction, determine the filling-up hole grouting scope around gutter, and make a mark in the neighboring of filling-up hole grouting, it is the loop concave of 4mm that the floor layer of gutter surrounding polish a degree of depth, because the bonding surface that main leakage point is gutter and filling-up hole to be in the milk and filling-up hole are in the milk and floor layer concrete joint surface place, so the neighboring of loop concave will exceed filling-up hole grouting neighboring 10cm, extend on former floor layer concrete structure, guarantee repairing effect;
B, on the floor layer of gutter surrounding, pick out a cross section be fall the annular groove of " V " font, and the degree of depth of described annular groove is 2cm, and A/F is 3cm;
C, roughening process is carried out to the external surface of loop concave and annular groove, then brushing interfacial agents, then adopt ungauged regions waterproof polymer mortar loop concave and annular groove to be filled and led up and tamp;
D, on the external surface tamping place apply 2 layers of cement based self-healing water-repellent paint, every thickness is about 2mm, be coated with water-repellent paint time, square crossing between first floor coating and second layer coating; In addition, when being coated with water-repellent paint, best water-repellent paint scope to stretch out 5cm from tamping outward flange, guarantees good waterproof effect.
Cement based self-healing water-repellent paint in the present embodiment adopts U.S. UGL particular function backwater pressure waterproof mildew resistant paint.
The invention has the beneficial effects as follows: drainage conduit of toilet percolating water back side restorative procedure of the present invention, the method construction sequence is simple, must not destroy the such as Wall or floor tile surface layer of existing pipeline, waterproofing course and leveling layer etc., green construction, energy-conserving and environment-protective, little on the impact of building using function, the engineering time is short, little on resident family's impact, plugging effect is good.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims (3)

1. a drainage conduit of toilet percolating water back side restorative procedure, is characterized in that, described drainage pipe is adopt first reserving hole in construction and installation process, and the mode of laggard perform hole hole grout sealing carries out installing;
Described restorative procedure is repaired from back side, comprises following concrete steps:
A, observation gutter and floor layer junction, determine the filling-up hole grouting scope around gutter, and make a mark in the neighboring of filling-up hole grouting, it is the loop concave of 2 ~ 4mm that the floor layer of gutter surrounding polish a degree of depth, and the neighboring of described loop concave will exceed filling-up hole grouting neighboring 8 ~ 10cm;
B, on the floor layer of gutter surrounding, pick out a cross section be fall the annular groove of " V " font, and the degree of depth of described annular groove is 1.5 ~ 2cm, and A/F is 2 ~ 3cm;
C, roughening process is carried out to the external surface of loop concave and annular groove, then brushing interfacial agents, then adopt ungauged regions waterproof polymer mortar loop concave and annular groove to be filled and led up and tamp;
D, on the external surface tamping place apply 2 layers of cement based self-healing water-repellent paint, every thickness about 1 ~ 2mm.
2. drainage conduit of toilet percolating water back side restorative procedure according to claim 1, is characterized in that, when being coated with water-repellent paint in steps d, and square crossing between first floor coating and second layer coating.
3. drainage conduit of toilet percolating water back side restorative procedure according to claim 1, is characterized in that, when being coated with water-repellent paint in steps d, water-repellent paint scope to stretch out 4 ~ 5cm from tamping outward flange.
CN201510797952.5A 2015-11-19 2015-11-19 Drainage conduit of toilet percolating water backwater surface repair method Active CN105442861B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510797952.5A CN105442861B (en) 2015-11-19 2015-11-19 Drainage conduit of toilet percolating water backwater surface repair method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510797952.5A CN105442861B (en) 2015-11-19 2015-11-19 Drainage conduit of toilet percolating water backwater surface repair method

Publications (2)

Publication Number Publication Date
CN105442861A true CN105442861A (en) 2016-03-30
CN105442861B CN105442861B (en) 2018-02-23

Family

ID=55553451

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510797952.5A Active CN105442861B (en) 2015-11-19 2015-11-19 Drainage conduit of toilet percolating water backwater surface repair method

Country Status (1)

Country Link
CN (1) CN105442861B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105782585A (en) * 2016-04-20 2016-07-20 宝钢集团新疆八钢铁有限公司 Technology for preventing seepage of suspended water cooling pond wall of corex furnace by means of reaming, pipe penetrating and blocking
CN107859282A (en) * 2017-11-17 2018-03-30 苏州闪电防水科技有限公司 Hotel toilet specific complex marine glue, infiltration rapid-maintenance technique
CN108277932A (en) * 2018-01-16 2018-07-13 厦门防水博士建筑工程有限公司 A kind of tube edge percolating water repairerment technique
CN113550575A (en) * 2021-09-06 2021-10-26 中建八局第四建设有限公司 Novel pipeline mold hanging process for prefabricated building
CN113669509A (en) * 2021-09-02 2021-11-19 苏州佳固士新材料科技有限公司 Indoor wall-penetrating pipe leakage repairing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100944335B1 (en) * 2009-02-26 2010-03-02 최재진 Waterproof plate sleeve for concrete construct
CN201547402U (en) * 2009-10-29 2010-08-11 河南省第二建筑工程有限责任公司 Bathroom tube-through-floor waterproof structure
CN103062511A (en) * 2012-12-30 2013-04-24 河北建设集团天辰建筑工程有限公司 Processing method for preventing water leakage at contact position of polyvinyl chloride (PVC) tube and concrete floor slab
CN104100097A (en) * 2013-04-02 2014-10-15 陈继宇 Construction method for repairing leakage of kitchens and toilets
CN204403584U (en) * 2014-12-26 2015-06-17 上海市政工程设计研究总院(集团)有限公司 Underground chamber wall-passing pipe prevent leakage prevention structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100944335B1 (en) * 2009-02-26 2010-03-02 최재진 Waterproof plate sleeve for concrete construct
CN201547402U (en) * 2009-10-29 2010-08-11 河南省第二建筑工程有限责任公司 Bathroom tube-through-floor waterproof structure
CN103062511A (en) * 2012-12-30 2013-04-24 河北建设集团天辰建筑工程有限公司 Processing method for preventing water leakage at contact position of polyvinyl chloride (PVC) tube and concrete floor slab
CN104100097A (en) * 2013-04-02 2014-10-15 陈继宇 Construction method for repairing leakage of kitchens and toilets
CN204403584U (en) * 2014-12-26 2015-06-17 上海市政工程设计研究总院(集团)有限公司 Underground chamber wall-passing pipe prevent leakage prevention structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105782585A (en) * 2016-04-20 2016-07-20 宝钢集团新疆八钢铁有限公司 Technology for preventing seepage of suspended water cooling pond wall of corex furnace by means of reaming, pipe penetrating and blocking
CN107859282A (en) * 2017-11-17 2018-03-30 苏州闪电防水科技有限公司 Hotel toilet specific complex marine glue, infiltration rapid-maintenance technique
CN108277932A (en) * 2018-01-16 2018-07-13 厦门防水博士建筑工程有限公司 A kind of tube edge percolating water repairerment technique
CN113669509A (en) * 2021-09-02 2021-11-19 苏州佳固士新材料科技有限公司 Indoor wall-penetrating pipe leakage repairing method
CN113550575A (en) * 2021-09-06 2021-10-26 中建八局第四建设有限公司 Novel pipeline mold hanging process for prefabricated building

Also Published As

Publication number Publication date
CN105442861B (en) 2018-02-23

Similar Documents

Publication Publication Date Title
CN105442861A (en) Method for restoring water leakage air face of toilet drainage pipeline
CN202788022U (en) Wall crack combined type repair structure
CN101864778B (en) Method for leaking stoppage of external wall of underground structure
CN103195104B (en) A kind of building method adopting anti-row's combination at building structure waterproof position
CN105220713B (en) The waterproof construction of outer wall of basement subsiding crack
CN110878700B (en) Tunnel waterproof structure and construction method thereof
CN103046513A (en) Method for coating and sealing fracture of bed rock in uncovered heavy consolidation grouting
CN207959289U (en) Structure is repaired in a kind of leak for basement post-pouring zone position
CN109653526A (en) Accomodation ground leak leak-blocking construction method
CN208380085U (en) The draining pipe-through floor slab structure of a kind of ground leak
CN107514150A (en) A kind of construction technology of utilization space displacement method reconstruction Durable Water Repellant
CN102912945B (en) Roof compound seepage-proofing steam exhausting hole detail treatment technology
CN110905053A (en) Construction method for indoor drainage pipeline penetrating through floor slab
CN109339118A (en) A kind of basement bottom board leakage-resistant device and construction method
CN204419202U (en) A kind of tunnel slot repair structure
CN103912123B (en) Caisson type washroom water leakage preventing-draining construction method
CN104975623A (en) Non-excavation leaking inspection well repairing method and repairing structure
CN103967313B (en) A kind of water-proof repairing method of steel concrete squat silo roof
CN103437408A (en) Built-in impermeable floor drain
CN208748690U (en) The waterproof slab structure of prefabricated piping lane
CN109930703A (en) A kind of construction technology of toilet warterproof beam
CN215518894U (en) A waterproof construction for indoor waterproof maintenance of basement
CN214329740U (en) Durable and environment-friendly toilet base surface waterproof structure
CN103774902A (en) Seepage preventing and leakage stopping method for sewage plant aeration tank
CN217601512U (en) Basement wall waterproof building structure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 213015 Jiangsu province Changzhou City Zhonglou District Mushu Road No. 10

Applicant after: Jiangsu Dingda Building New Technology Co., Ltd.

Applicant after: Changzhou Institute of building science group Limited by Share Ltd

Address before: 213015 Jiangsu province Changzhou City Zhonglou District Mushu Road No. 10

Applicant before: Jiangsu Dingda Building New Technology Co., Ltd.

Applicant before: Changzhou Architectural Research Institute Co., Ltd.

CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Ren Shengyuan

Inventor after: Zhou Wenping

Inventor after: Zhou Junjie

Inventor after: Ma Zhenyu

Inventor after: Chen Ming

Inventor before: Ren Shengyuan

Inventor before: Zhou Wenping

Inventor before: Huang Haikun

Inventor before: Ma Zhenyu

GR01 Patent grant
GR01 Patent grant