US3786531A - Portable self-cleaning door mat - Google Patents
Portable self-cleaning door mat Download PDFInfo
- Publication number
- US3786531A US3786531A US00269825A US3786531DA US3786531A US 3786531 A US3786531 A US 3786531A US 00269825 A US00269825 A US 00269825A US 3786531D A US3786531D A US 3786531DA US 3786531 A US3786531 A US 3786531A
- Authority
- US
- United States
- Prior art keywords
- aperture
- top surface
- valve means
- apertures
- cleaning door
- 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.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L23/00—Cleaning footwear
- A47L23/22—Devices or implements resting on the floor for removing mud, dirt, or dust from footwear
- A47L23/26—Mats or gratings combined with brushes ; Mats
- A47L23/263—Mats or gratings combined with brushes ; Mats with moving or driven parts, also combined with suction cleaning
Definitions
- ABSTRACT A self-cleaning door mat having a hollow mat frame which is provided with a top plate of substantially rigid material. The plate is formed with a plurality of depressed apertures which are preferably aligned axially and transversely. The marginal crests of the depressions are covered with felt or other soft material which will remove dirt from shoes, etc.
- the apertures are closed by spring mounted valve members which protrude above the depressions a sufficient distance to be unseated by being depressed by a person's foot being wiped off on the soft material or by a person standing thereon.
- the dirt is sucked down through the apertures by a suction device which device automatically starts when stepped-on.
- the suction device is connected to a collector into which the dirt is deposited.
- the preferred construction of the door mat of the invention consists essentially of a rectangular hollow frame having a top divided into a plurality of depressions arranged in aligned rows of grid-like form, each depression being centrally apertured with each aperture being closed by a ball-valve spring biased to closed position, boot scraping means arranged around the crest of each depression, an electrically operated suction device operatively communicating with the interior of the frame for removing dirt therefrom and switch means controlling the operation of the suction device.
- FIG. 1 is a plan view of the door mat
- FIG. 2 is a cross-section on the line 22 of FIG. 1.
- the door mat illustrated in the drawings comprises a substantially rectangular hollow frame defined by bottom wall 11, top wall 12, and four side walls, two of which 13,14 are illustrated.
- the top 2 is divided into a plurality of depressions arranged in aligned rows of grid-like form with apertures 16 formed centrally in each depression.
- the marginal edges 17 are all co-planar, of substantial width and form a grid-like pattern on the surface or top 12.
- each ball-valve 18 is mounted on a coil spring 19 confined within a channel 20 for retaining the spring in a vertical position.
- the channels 20 are formed with passages adjacent the bottom wall 11 and are of sufficient size as to permit dirt to flow readily to the suction device hereinafter mentioned. It will be seen from FIG.
- the diameter of the ball-valve 18 is greater than the diameter of the aperture 16 withthe ball-valve protruding above the depressed portion and slightly above the marginal edges 17 so that when a person steps on the mat and scrapes the dirt off his shoe, the sole of his or her shoe will contact and depress one or more of the balls as the case may be, causing the dirt to slide into the depression and be sucked into the inside of the hollow frame vIII.
- the marginal edges 17 may be covered with piled fabric or similar material to aid in the removal of dirt.
- the wall 13 is provided with an outlet 21 which is connected to a suction device 22 having a dirt collector receptacle 23.
- the electrical circuit 24 is connected to a suitable source of electricity and the operation of the suction device controlled through an electrical switch 27 which is closed and opened by a person stepping on and off the mat.
- a stop member 26 is mounted in the channel and projects upwardly through the coil spring. The stop member limits the depression of the ball to prevent shoe heels being caught.
- a self-cleaning door mat consisting essentially of a hollow substantially rectangular body having its top surface formed with a plurality of depressions, each depression being centrally apertured and being bordered by a piled material, a spring biased valve means closing each aperture, said valve means being constructed and arranged to be unseated by a person stepping on the top surface, an electrically operated suction means communicating with the interior of the body, and electric switch means controlling the operation of the suction means.
- valve means comprises a compression spring mounted below each aperture and a ball seated on the top end of the spring, said ball having a diameter greater than the diameter of the aperture seating against the underside of the aperture, said ball having a portion of its periphery projecting through said aperture a sufficient distance to be engaged and depressed by a person standing on the top surface.
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- Carpets (AREA)
Abstract
A self-cleaning door mat having a hollow mat frame which is provided with a top plate of substantially rigid material. The plate is formed with a plurality of depressed apertures which are preferably aligned axially and transversely. The marginal crests of the depressions are covered with felt or other soft material which will remove dirt from shoes, etc. The apertures are closed by spring mounted valve members which protrude above the depressions a sufficient distance to be unseated by being depressed by a person''s foot being wiped off on the soft material or by a person standing thereon. The dirt is sucked down through the apertures by a suction device which device automatically starts when stepped-on. The suction device is connected to a collector into which the dirt is deposited.
Description
United States Patent [1 1 Borg [451 Jan. 22, 1974 PORTABLE SELF-CLEANING DOOR MAT [76] Inventor: John P. Borg, 271 St. Johns Rd.,
Toronto, Ontario, Canada [22] Filed: July 7, 1972 [21] Appl. No.: 269,825
[52] US. Cl. 15/311), 15/161 [51] Int. Cl A471 5/38 [58] Field of Search 15/301, 303, 310, 311, 36,
[56] References Cited UNITED STATES PATENTS 3,165,773 l/1965 Palpacelli 15/310 3,649,994 3/1972 Harris 15/311 FOREIGN PATENTS OR APPLICATIONS 742,839 9/1966 Canada 15/303 Primary Examiner-Peter Feldman Assistant ExaminerC. K. Moore [57] ABSTRACT A self-cleaning door mat having a hollow mat frame which is provided with a top plate of substantially rigid material. The plate is formed with a plurality of depressed apertures which are preferably aligned axially and transversely. The marginal crests of the depressions are covered with felt or other soft material which will remove dirt from shoes, etc. The apertures are closed by spring mounted valve members which protrude above the depressions a sufficient distance to be unseated by being depressed by a person's foot being wiped off on the soft material or by a person standing thereon. The dirt is sucked down through the apertures by a suction device which device automatically starts when stepped-on. The suction device is connected to a collector into which the dirt is deposited.
3 Uaims, 2 Drawing Figures 1 PORTABLE SELF-CLEANING DOOR MAT BACKGROUND OF THE INVENTION The maintenance of door mats, at the entrance to buildings, etc., in a clean condition, at all times, in localities where dirt and snow is prevalent is sometimes a difficult task. Under these conditions, unless the door mat is constantly cleaned, it soon becomes filthy and useless for the intended purposes of preventing dirt from shoes being carried into the building. Such constant cleaning is impractical by manual means.
It is therefore an object of this invention to provide a door mat which incorporates an automatic mechanical cleaning device which will constantly clean the mat and remove the dirt during each use.
OUTLINE OF THE INVENTION The preferred construction of the door mat of the invention consists essentially of a rectangular hollow frame having a top divided into a plurality of depressions arranged in aligned rows of grid-like form, each depression being centrally apertured with each aperture being closed by a ball-valve spring biased to closed position, boot scraping means arranged around the crest of each depression, an electrically operated suction device operatively communicating with the interior of the frame for removing dirt therefrom and switch means controlling the operation of the suction device.
DESCRIPTION OF THE INVENTION The preferred form of the invention will now be described having reference to the accompanying drawings in which:
FIG. 1 is a plan view of the door mat; and
FIG. 2 is a cross-section on the line 22 of FIG. 1.
The door mat illustrated in the drawings comprises a substantially rectangular hollow frame defined by bottom wall 11, top wall 12, and four side walls, two of which 13,14 are illustrated.
The top 2 is divided into a plurality of depressions arranged in aligned rows of grid-like form with apertures 16 formed centrally in each depression. The marginal edges 17 are all co-planar, of substantial width and form a grid-like pattern on the surface or top 12.
Mounted within the frame 10 is a plurality of ballvalves 18, one for each aperture. Each ball-valve 18 is mounted on a coil spring 19 confined within a channel 20 for retaining the spring in a vertical position. The channels 20 are formed with passages adjacent the bottom wall 11 and are of sufficient size as to permit dirt to flow readily to the suction device hereinafter mentioned. It will be seen from FIG. 2 that the diameter of the ball-valve 18 is greater than the diameter of the aperture 16 withthe ball-valve protruding above the depressed portion and slightly above the marginal edges 17 so that when a person steps on the mat and scrapes the dirt off his shoe, the sole of his or her shoe will contact and depress one or more of the balls as the case may be, causing the dirt to slide into the depression and be sucked into the inside of the hollow frame vIII. The marginal edges 17 may be covered with piled fabric or similar material to aid in the removal of dirt. In order to remove the dirt from the interior of the mat and also to draw the dirt into the interior, the wall 13 is provided with an outlet 21 which is connected to a suction device 22 having a dirt collector receptacle 23. The electrical circuit 24 is connected to a suitable source of electricity and the operation of the suction device controlled through an electrical switch 27 which is closed and opened by a person stepping on and off the mat.
To prevent the heels of womens shoes depressing the balls too far and thus being caught in the apertures, a stop member 26 is mounted in the channel and projects upwardly through the coil spring. The stop member limits the depression of the ball to prevent shoe heels being caught.
What I claim is:
1. A self-cleaning door mat consisting essentially of a hollow substantially rectangular body having its top surface formed with a plurality of depressions, each depression being centrally apertured and being bordered by a piled material, a spring biased valve means closing each aperture, said valve means being constructed and arranged to be unseated by a person stepping on the top surface, an electrically operated suction means communicating with the interior of the body, and electric switch means controlling the operation of the suction means.
2. The self-cleaning door mat according to claim 1 in which said valve means comprises a compression spring mounted below each aperture and a ball seated on the top end of the spring, said ball having a diameter greater than the diameter of the aperture seating against the underside of the aperture, said ball having a portion of its periphery projecting through said aperture a sufficient distance to be engaged and depressed by a person standing on the top surface.
3. A self-cleaning door mat consisting essentially of a hollow substantially rectangular body having its top surface divided into a plurality of depressions in aligned rows of grid-like form with an aperture disposed centrally in each depression, each depression being bordered by a piled material, a spring biased valve means closing each aperture, said valve means being constructed and arranged to be unseated by a person stepping on the top surface, an electrically operated suction means communicating with the interior of the body and said apertures to draw air through the piled material and the apertures when said valve means is open, and electric'switch means controlling the operation of the suction means.
Claims (3)
1. A self-cleaning door mat consisting essentially of a hollow substantially rectangular body having its top surface formed with a plurality of depressions, each depression being centrally apertured and being bordered by a piled material, a spring biased valve means closing each aperture, said valve means being constructed and arranged to be unseated by a person stepping on the top surface, an electrically operated suction means communicating with the interior of the body, and electric switch means controlling the operation of the suction means.
2. The self-cleaning door mat according to claim 1 in which said valve means comprises a compression spring mounted below each aperture and a ball seated on the top end of the spring, said ball having a diameter greater than the diameter of the aperture seating against the underside of the aperture, said ball having a portion of its periphery projecting through said aperture a sufficient distance to be engaged and depressed by a person standing on the top surface.
3. A self-cleaning door mat consisting essentially of a hollow substantially rectangular body having its top surface divided into a plurality of depressions in aligned rows of grid-like form with an aperture disposed centrally in each depression, each depression being bordered by a piled material, a spring biased valve means closing each aperture, said valve means being constructed and arranged to be unseated by a person stepping on the top surface, an electrically operated suction means communicating with the interior of the body and said apertures to draw air through the piled material and the apertures when said valve means is open, and electric switch means controlling the operation of the suction means.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26982572A | 1972-07-07 | 1972-07-07 |
Publications (1)
Publication Number | Publication Date |
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US3786531A true US3786531A (en) | 1974-01-22 |
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ID=23028810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00269825A Expired - Lifetime US3786531A (en) | 1972-07-07 | 1972-07-07 | Portable self-cleaning door mat |
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Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027355A (en) * | 1973-12-17 | 1977-06-07 | Mead George N J | Pneumatic cleaning mat and method of making same |
US5588175A (en) * | 1995-05-08 | 1996-12-31 | Zahner; John | Foot vacuum |
US5655253A (en) * | 1996-05-13 | 1997-08-12 | Nevin; Robert L. | Bench top dust collector |
US5870797A (en) * | 1996-02-23 | 1999-02-16 | Anderson; Kent George | Vacuum cleaning system |
US20020162467A1 (en) * | 2001-01-22 | 2002-11-07 | Heidelberger Druckmaschinen Ag | Flow-restricted printing cylinder for a removable printing sleeve |
US6532618B2 (en) * | 2001-06-01 | 2003-03-18 | Robert Koch | Floor mat with incorporated vacuum system |
US20040012908A1 (en) * | 2002-07-19 | 2004-01-22 | Toppoly Optoelectronics Corp. | Floor mat for collecting process particles and grounding the electrostatic charge |
US6682463B2 (en) * | 2001-01-08 | 2004-01-27 | Kenneth Michael Jackson | Fluid collection system for ring events |
US20040255484A1 (en) * | 1999-03-08 | 2004-12-23 | Storrer Ernest J. | System and method for removing moisture from water laden structures |
US20050132596A1 (en) * | 1999-03-08 | 2005-06-23 | Storrer Ernest J. | Moisture removal system |
WO2007030103A1 (en) * | 2005-09-06 | 2007-03-15 | Promethean Medical Technologies, Inc. | Disposable fluid collection apparatus |
US20070271723A1 (en) * | 2006-05-24 | 2007-11-29 | Corey Junell | Door Threshold Vacuum |
EP2014217A1 (en) * | 2006-04-14 | 2009-01-14 | Sun Engineering Co.Ltd. | Dust suction apparatus |
US20090139046A1 (en) * | 2007-12-03 | 2009-06-04 | Paul Kappos | Air induction hard surface cleaning tool with an internal baffle |
US20090265856A1 (en) * | 2008-04-25 | 2009-10-29 | Weidong Xu | Dust collecting device |
US20090288685A1 (en) * | 2006-09-14 | 2009-11-26 | Wolfe Kevin A | Self-propelled extraction systems and methods |
US7985143B1 (en) * | 2004-03-12 | 2011-07-26 | Daxon Moses F | Boxing ring corner mat |
US20120167338A1 (en) * | 2011-01-03 | 2012-07-05 | Williams Bennie E | Self-Contained Cleaning Device for Shoe Soles |
CN102743088A (en) * | 2012-07-19 | 2012-10-24 | 吴江科沃客机械设备有限公司 | Novel door mat |
USD684737S1 (en) | 2011-08-31 | 2013-06-18 | Dri-Eaz Products, Inc. | Extractor housing |
USD701661S1 (en) | 2012-09-04 | 2014-03-25 | Dri-Eaz Products, Inc. | Extractor port housing |
US20140158035A1 (en) * | 2012-11-26 | 2014-06-12 | Abm International, Inc. | System and method for capturing thread from an entraining air flow |
US20140265092A1 (en) * | 2013-03-15 | 2014-09-18 | Carl Looney | Vacuum-based cleaning apparatus and method |
US20140331442A1 (en) * | 2013-05-10 | 2014-11-13 | G.M Corp. | Dust Suction Apparatus for Shoes |
US9195238B2 (en) | 2012-06-15 | 2015-11-24 | Sapphire Scientific, Inc. | Waste water vessels with multiple valved chambers, and associated systems and methods |
US9351622B2 (en) | 2012-09-04 | 2016-05-31 | Sapphire Scientific Inc. | Fluid extracting device with shaped head and associated systems and methods of use and manufacture |
US10060641B2 (en) | 2015-02-25 | 2018-08-28 | Dri-Eaz Products, Inc. | Systems and methods for drying roofs |
WO2018232329A1 (en) * | 2017-06-15 | 2018-12-20 | Moran Robert J | Self-cleaning carpet |
CN110545706A (en) * | 2017-04-13 | 2019-12-06 | 泰通株式会社 | Dust suction device suitable for beads |
US10827898B2 (en) | 2017-06-15 | 2020-11-10 | Robert J. Moran | Self-cleaning carpet |
US11707178B2 (en) | 2019-02-28 | 2023-07-25 | Bissell Inc. | Shoe cleaning apparatus and method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3165773A (en) * | 1960-10-28 | 1965-01-19 | Palpacelli Elio | Electrically actuated, automatic suction door-mat |
CA742839A (en) * | 1966-09-20 | George Attle | Method and apparatus for combined pressure and vacuum shoe drying and cleaning | |
US3649994A (en) * | 1970-11-09 | 1972-03-21 | Ewell J Harris | Pedestrian footwear cleaner |
-
1972
- 1972-07-07 US US00269825A patent/US3786531A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA742839A (en) * | 1966-09-20 | George Attle | Method and apparatus for combined pressure and vacuum shoe drying and cleaning | |
US3165773A (en) * | 1960-10-28 | 1965-01-19 | Palpacelli Elio | Electrically actuated, automatic suction door-mat |
US3649994A (en) * | 1970-11-09 | 1972-03-21 | Ewell J Harris | Pedestrian footwear cleaner |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027355A (en) * | 1973-12-17 | 1977-06-07 | Mead George N J | Pneumatic cleaning mat and method of making same |
US5588175A (en) * | 1995-05-08 | 1996-12-31 | Zahner; John | Foot vacuum |
US5870797A (en) * | 1996-02-23 | 1999-02-16 | Anderson; Kent George | Vacuum cleaning system |
US5655253A (en) * | 1996-05-13 | 1997-08-12 | Nevin; Robert L. | Bench top dust collector |
US20040255484A1 (en) * | 1999-03-08 | 2004-12-23 | Storrer Ernest J. | System and method for removing moisture from water laden structures |
US20100192400A1 (en) * | 1999-03-08 | 2010-08-05 | Storrer Ernest J | Moisture removal system |
US20050132596A1 (en) * | 1999-03-08 | 2005-06-23 | Storrer Ernest J. | Moisture removal system |
US9989307B2 (en) * | 1999-03-08 | 2018-06-05 | Injectidry Systems, Inc. | System and method for removing moisture from water laden structures |
US6682463B2 (en) * | 2001-01-08 | 2004-01-27 | Kenneth Michael Jackson | Fluid collection system for ring events |
US6725775B2 (en) * | 2001-01-22 | 2004-04-27 | Heidelberger Druckmaschinen Ag | Flow-restricted printing cylinder for a removable printing sleeve |
US20020162467A1 (en) * | 2001-01-22 | 2002-11-07 | Heidelberger Druckmaschinen Ag | Flow-restricted printing cylinder for a removable printing sleeve |
US6532618B2 (en) * | 2001-06-01 | 2003-03-18 | Robert Koch | Floor mat with incorporated vacuum system |
US20040012908A1 (en) * | 2002-07-19 | 2004-01-22 | Toppoly Optoelectronics Corp. | Floor mat for collecting process particles and grounding the electrostatic charge |
US7184255B2 (en) * | 2002-07-19 | 2007-02-27 | Ching-Lung Chen | Floor mat for collecting process particles and grounding the electrostatic charge |
US7985143B1 (en) * | 2004-03-12 | 2011-07-26 | Daxon Moses F | Boxing ring corner mat |
WO2007030103A1 (en) * | 2005-09-06 | 2007-03-15 | Promethean Medical Technologies, Inc. | Disposable fluid collection apparatus |
US20100011962A1 (en) * | 2006-04-14 | 2010-01-21 | Sun Engineering Co., Ltd. | Dust collection system |
EP2014217A4 (en) * | 2006-04-14 | 2010-07-21 | Sun Engineering | Dust suction apparatus |
EP2014217A1 (en) * | 2006-04-14 | 2009-01-14 | Sun Engineering Co.Ltd. | Dust suction apparatus |
US8092564B2 (en) | 2006-04-14 | 2012-01-10 | Sun Engineering Co., Ltd. | Dust collection system |
US7472452B2 (en) * | 2006-05-24 | 2009-01-06 | Corey Junell | Door threshold vacuum |
US20070271723A1 (en) * | 2006-05-24 | 2007-11-29 | Corey Junell | Door Threshold Vacuum |
US20090288685A1 (en) * | 2006-09-14 | 2009-11-26 | Wolfe Kevin A | Self-propelled extraction systems and methods |
US20090139046A1 (en) * | 2007-12-03 | 2009-06-04 | Paul Kappos | Air induction hard surface cleaning tool with an internal baffle |
US8510902B2 (en) | 2007-12-03 | 2013-08-20 | Dri-Eaz Products, Inc. | Air induction hard surface cleaning tool with an internal baffle |
US9066647B2 (en) | 2007-12-03 | 2015-06-30 | Dri-Eaz Products, Inc. | Air induction hard surface cleaning tools with an internal baffle |
US20090265856A1 (en) * | 2008-04-25 | 2009-10-29 | Weidong Xu | Dust collecting device |
US20120167338A1 (en) * | 2011-01-03 | 2012-07-05 | Williams Bennie E | Self-Contained Cleaning Device for Shoe Soles |
US8533901B2 (en) * | 2011-01-03 | 2013-09-17 | Bennie E. Williams | Self-contained cleaning device for shoe soles |
USD684737S1 (en) | 2011-08-31 | 2013-06-18 | Dri-Eaz Products, Inc. | Extractor housing |
US9195238B2 (en) | 2012-06-15 | 2015-11-24 | Sapphire Scientific, Inc. | Waste water vessels with multiple valved chambers, and associated systems and methods |
CN102743088A (en) * | 2012-07-19 | 2012-10-24 | 吴江科沃客机械设备有限公司 | Novel door mat |
USD701661S1 (en) | 2012-09-04 | 2014-03-25 | Dri-Eaz Products, Inc. | Extractor port housing |
US9351622B2 (en) | 2012-09-04 | 2016-05-31 | Sapphire Scientific Inc. | Fluid extracting device with shaped head and associated systems and methods of use and manufacture |
US20140158035A1 (en) * | 2012-11-26 | 2014-06-12 | Abm International, Inc. | System and method for capturing thread from an entraining air flow |
US10655258B2 (en) * | 2012-11-26 | 2020-05-19 | Abm International, Inc. | Method for capturing thread from an entraining air flow |
US9828710B2 (en) * | 2012-11-26 | 2017-11-28 | Abm International, Inc. | System and method for capturing thread from an entraining air flow |
US9986889B2 (en) * | 2013-03-15 | 2018-06-05 | Carl Looney | Vacuum-based cleaning apparatus and method |
US20140265092A1 (en) * | 2013-03-15 | 2014-09-18 | Carl Looney | Vacuum-based cleaning apparatus and method |
US20140331442A1 (en) * | 2013-05-10 | 2014-11-13 | G.M Corp. | Dust Suction Apparatus for Shoes |
US10060641B2 (en) | 2015-02-25 | 2018-08-28 | Dri-Eaz Products, Inc. | Systems and methods for drying roofs |
US10753628B2 (en) | 2015-02-25 | 2020-08-25 | Legend Brands, Inc. | Systems and methods for drying roofs |
US11686482B2 (en) | 2015-02-25 | 2023-06-27 | Legend Brands, Inc. | Systems and methods for drying roofs |
CN110545706A (en) * | 2017-04-13 | 2019-12-06 | 泰通株式会社 | Dust suction device suitable for beads |
JP2020516435A (en) * | 2017-04-13 | 2020-06-11 | テストニック カンパニー リミテッドTestonic Co., Ltd. | Dust suction device using beads |
JP7203437B2 (en) | 2017-04-13 | 2023-01-13 | テストニック カンパニー リミテッド | Dust suction device using beads |
WO2018232329A1 (en) * | 2017-06-15 | 2018-12-20 | Moran Robert J | Self-cleaning carpet |
US10827898B2 (en) | 2017-06-15 | 2020-11-10 | Robert J. Moran | Self-cleaning carpet |
US10945571B2 (en) | 2017-06-15 | 2021-03-16 | Robert J. Moran | Self-cleaning carpet |
US11707178B2 (en) | 2019-02-28 | 2023-07-25 | Bissell Inc. | Shoe cleaning apparatus and method |
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