US20010031206A1 - Vacuum apparatus and fan casing for the same - Google Patents
Vacuum apparatus and fan casing for the same Download PDFInfo
- Publication number
- US20010031206A1 US20010031206A1 US09/456,836 US45683699A US2001031206A1 US 20010031206 A1 US20010031206 A1 US 20010031206A1 US 45683699 A US45683699 A US 45683699A US 2001031206 A1 US2001031206 A1 US 2001031206A1
- Authority
- US
- United States
- Prior art keywords
- fan casing
- recessed portion
- vacuum apparatus
- fan
- casing
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
- A01G20/40—Apparatus for cleaning the lawn or grass surface
- A01G20/43—Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
- A01G20/47—Vacuum or blower devices
Definitions
- the present invention relates to a vacuum apparatus and, more particularly, to a vacuum cleaner used for cleaning up, for example, fallen leaves, wooden chips, and waste, and to a fan casing for the same.
- incoming materials are passed through a fan casing while sliding against an inner surface of the fan casing; hence, the inner surface of the fan casing is apt to wear due to the contact with the incoming materials. If the fan casing is subjected to continued use for an extended period of time without being replaced at appropriate intervals, then the fan casing may incur serious damage or incoming materials may leak out, or other problems may arise during operation of the device.
- the present invention has been made with a view toward solving the problems associated with the related art, and it is an object thereof to provide a vacuum apparatus that enables a user to easily check from outside a degree of wear on an inner surface of a fan casing that is caused by frictional contact with incoming materials so as to allow the user to easily know the appropriate time to replace the fan casing.
- the present invention provides a vacuum apparatus equipped with a fan casing through which an incoming material passes, wherein an outer surface of the fan casing is provided with a recessed portion that extends toward the inner surface of the fan casing.
- the recessed portion has the appearance of a protrusion when viewed from inside the fan casing.
- the recessed portion wears more quickly than the rest of the inner surface of the fan casing. Therefore, the user will be able to easily know when to replace the fan casing by visually checking the recessed portion from outside the fan casing. If the wear on the recessed portion advances until a hole finally opens in the recessed portion, then a noise (e.g. a whistle-like noise) that is different from normal operating noises will be produced, so that the time to replace the fan casing can be known audibly as well as visually.
- a noise e.g. a whistle-like noise
- the depth of the recessed portion can be set so that an outer surface of the recessed portion reaches the inner surface of the fan casing, or the outer surface of the recessed portion is positioned farther inward than the inner surface of the fan casing.
- the number of the protrusions is not limited to one; any appropriate number of recessed portions may be provided along the outer periphery of the fan casing.
- FIG. 1 is a perspective general view of a vacuum cleaner in accordance with an embodiment of the present invention.
- FIG. 2 is a front view showing a fan casing of the vacuum cleaner of FIG. 1.
- FIG. 3 is an enlarged sectional view of an essential section of the fan casing of FIG. 2.
- a vacuum apparatus in accordance with one embodiment of the present invention is a vacuum cleaner used for cleaning up fallen leaves, wood chips, waste, and other materials.
- a main body 1 of the vacuum apparatus is integrally equipped with an air-cooled two-cycle gasoline engine 2 working as a driving motor, a recoil starter 3 for starting the engine 2 , a fuel tank 4 , a fan casing 5 , and operating handles 9 and 10 that provide grasping portions for an operator.
- the upper operating handle 9 is provided with an output control lever 15 for the engine 2 .
- a suction pipe 6 is detachably coupled to an intake opening 5 d of the fan casing 5
- a blowout pipe 7 is detachably coupled to an outlet opening 5 a of the fan casing 5 .
- a dust bag 8 having appropriate air permeability is detachably connected to a downstream or blowout end of the blowout pipe 7 .
- the fan casing 5 , the suction pipe 6 , and the blowout pipe 7 are formed of, for example, a plastic constituent to minimize the weight of the apparatus.
- the fan casing 5 is removably attached to one side surface of the main body 1 by a plurality of attaching sections 5 c provided along an outer periphery thereof.
- a cutter 11 and a fan 12 are positioned in the fan casing 5 , and the cutter 11 and the fan 12 are also mounted on an output shaft 14 of the engine 2 .
- the suction pipe 6 is detachably coupled to the intake opening 5 d of the fan casing 5 .
- a recessed portion 13 that extends toward the inner surface 5 b of the fan casing 5 is formed along the outer periphery of the fan casing 5 .
- the recessed portion 13 is provided at a location in the fan casing 5 that is prone to be worn due to frictional contact with incoming materials.
- an appropriate number of the recessed portions 13 are provided at appropriate locations, instead of providing just one.
- an outer surface 13 a (the surface facing the outside of the fan casing 5 ) of the recessed portion 13 extends inward, and beyond the inner surface 5 b of the fan casing 5 .
- the depth of the recessed portion 13 is set so that the outer surface 13 a of the recessed portion 13 is positioned farther inward than the inner surface 5 b of the fan casing 5 .
- the wall of the recessed portion 13 becomes thin, allowing the operator to visually check the degree of wear of the inner surface 5 b easily from outside the fan casing 5 .
- materials appear either lighter in color or more transparent as they become thinner due to wear. Thus, the operator can easily know the appropriate time to replace the fan casing 5 .
- the wall thickness, depth, and other characteristics of the recessed portion 13 may be set according to the desired replacement interval of the fan casing 5 . If the foregoing whistling effect is not mandatory, then the outer surface 13 a of the recessed portion 13 does not have to be deep enough to reach the inner surface 5 b of the fan casing 5 ; the recessed portion 13 may have a depth that makes a thinner wall portion that corresponds to an allowable amount of wear. Alternatively, the recessed portion 13 may be filled with a transparent constituent such as a synthetic resin to prevent materials from exiting out of the holes created by a worn recessed portion 13 although this prevents the whistling effect.
- a transparent constituent such as a synthetic resin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a vacuum apparatus and, more particularly, to a vacuum cleaner used for cleaning up, for example, fallen leaves, wooden chips, and waste, and to a fan casing for the same.
- 2. Description of the Related Art
- In a vacuum cleaner used for cleaning up fallen leaves, wooden chips, waste, and other items (U.S. Pat. No. 5,245,726 is an example of such a device), incoming materials are passed through a fan casing while sliding against an inner surface of the fan casing; hence, the inner surface of the fan casing is apt to wear due to the contact with the incoming materials. If the fan casing is subjected to continued use for an extended period of time without being replaced at appropriate intervals, then the fan casing may incur serious damage or incoming materials may leak out, or other problems may arise during operation of the device.
- Accordingly, the present invention has been made with a view toward solving the problems associated with the related art, and it is an object thereof to provide a vacuum apparatus that enables a user to easily check from outside a degree of wear on an inner surface of a fan casing that is caused by frictional contact with incoming materials so as to allow the user to easily know the appropriate time to replace the fan casing.
- To this end, the present invention provides a vacuum apparatus equipped with a fan casing through which an incoming material passes, wherein an outer surface of the fan casing is provided with a recessed portion that extends toward the inner surface of the fan casing. The recessed portion has the appearance of a protrusion when viewed from inside the fan casing.
- According to the present invention, if incoming materials frequently pass through the fan casing, then the recessed portion wears more quickly than the rest of the inner surface of the fan casing. Therefore, the user will be able to easily know when to replace the fan casing by visually checking the recessed portion from outside the fan casing. If the wear on the recessed portion advances until a hole finally opens in the recessed portion, then a noise (e.g. a whistle-like noise) that is different from normal operating noises will be produced, so that the time to replace the fan casing can be known audibly as well as visually.
- In a preferred embodiment of the present invention, the depth of the recessed portion can be set so that an outer surface of the recessed portion reaches the inner surface of the fan casing, or the outer surface of the recessed portion is positioned farther inward than the inner surface of the fan casing.
- Furthermore, the number of the protrusions is not limited to one; any appropriate number of recessed portions may be provided along the outer periphery of the fan casing.
- FIG. 1 is a perspective general view of a vacuum cleaner in accordance with an embodiment of the present invention.
- FIG. 2 is a front view showing a fan casing of the vacuum cleaner of FIG. 1.
- FIG. 3 is an enlarged sectional view of an essential section of the fan casing of FIG. 2.
- As shown in FIG. 1, a vacuum apparatus in accordance with one embodiment of the present invention is a vacuum cleaner used for cleaning up fallen leaves, wood chips, waste, and other materials. A
main body 1 of the vacuum apparatus is integrally equipped with an air-cooled two-cycle gasoline engine 2 working as a driving motor, a recoil starter 3 for starting the engine 2, a fuel tank 4, afan casing 5, andoperating handles 9 and 10 that provide grasping portions for an operator. The upper operating handle 9 is provided with anoutput control lever 15 for the engine 2. Asuction pipe 6 is detachably coupled to an intake opening 5 d of thefan casing 5, while a blowout pipe 7 is detachably coupled to an outlet opening 5 a of thefan casing 5. Adust bag 8 having appropriate air permeability is detachably connected to a downstream or blowout end of the blowout pipe 7. - In the vacuum apparatus, the
fan casing 5, thesuction pipe 6, and the blowout pipe 7 are formed of, for example, a plastic constituent to minimize the weight of the apparatus. - Referring to FIG. 2, the
fan casing 5 is removably attached to one side surface of themain body 1 by a plurality of attachingsections 5 c provided along an outer periphery thereof. Acutter 11 and afan 12 are positioned in thefan casing 5, and thecutter 11 and thefan 12 are also mounted on an output shaft 14 of the engine 2. Thesuction pipe 6 is detachably coupled to the intake opening 5 d of thefan casing 5. - When the
fan 12 rotates, incoming materials such as fallen leaves, wood chips, and waste are drawn into thefan casing 5 through thesuction pipe 6, smashed by thecutter 11, guided in slidable contact with aninner surface 5 b of thefan casing 5 that is smoothly curved, blown out through the blowout pipe 7, and accommodated in thedust bag 8. - In this embodiment, a
recessed portion 13 that extends toward theinner surface 5 b of thefan casing 5 is formed along the outer periphery of thefan casing 5. Therecessed portion 13 is provided at a location in thefan casing 5 that is prone to be worn due to frictional contact with incoming materials. Preferably, an appropriate number of the recessedportions 13 are provided at appropriate locations, instead of providing just one. - As shown in an enlarged view of FIG. 3, an
outer surface 13 a (the surface facing the outside of the fan casing 5) of therecessed portion 13 extends inward, and beyond theinner surface 5 b of thefan casing 5. In other words, the depth of therecessed portion 13 is set so that theouter surface 13 a of therecessed portion 13 is positioned farther inward than theinner surface 5 b of thefan casing 5. - Most incoming materials drawn into the
fan casing 5 through thesuction pipe 6 when thefan 12 rotates are fed from the intake opening 5 d toward the outlet opening 5 a while being held firmly in frictional contact with theinner surface 5 b of the smoothly curved outer periphery of thefan casing 5 by a centrifugal force produced by the rotation of thefan 12. Therefore, in a prolonged use, theinner surface 5 b of thefan casing 5 gradually wears from the frictional contact with the incoming materials. In this case, since therecessed portion 13 is provided in thefan casing 5 at a location prone to wear, therecessed portion 13 wears more quickly than other portions of thefan casing 5. As a result, the wall of therecessed portion 13 becomes thin, allowing the operator to visually check the degree of wear of theinner surface 5 b easily from outside thefan casing 5. Generally, materials appear either lighter in color or more transparent as they become thinner due to wear. Thus, the operator can easily know the appropriate time to replace thefan casing 5. - Moreover, when the wear of the
recessed portion 13 advances until a hole opens therein, then the hole will produce a noise (e.g. a whistle-like noise) that is different from normal operating noises, so that the proper time to replace thefan casing 5 can be known audibly as well as visually from outside thefan casing 5. An appropriate number of recessedportions 13 distributed at appropriate locations in thefan casing 5 permits more reliable check of wear. - The wall thickness, depth, and other characteristics of the
recessed portion 13 may be set according to the desired replacement interval of thefan casing 5. If the foregoing whistling effect is not mandatory, then theouter surface 13 a of therecessed portion 13 does not have to be deep enough to reach theinner surface 5 b of thefan casing 5; therecessed portion 13 may have a depth that makes a thinner wall portion that corresponds to an allowable amount of wear. Alternatively, therecessed portion 13 may be filled with a transparent constituent such as a synthetic resin to prevent materials from exiting out of the holes created by a wornrecessed portion 13 although this prevents the whistling effect.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP354697/1998 | 1998-12-14 | ||
JP35469798A JP4309985B2 (en) | 1998-12-14 | 1998-12-14 | Vacuum cleaner |
JP10-354697 | 1998-12-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010031206A1 true US20010031206A1 (en) | 2001-10-18 |
US6368066B2 US6368066B2 (en) | 2002-04-09 |
Family
ID=18439304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/456,836 Expired - Lifetime US6368066B2 (en) | 1998-12-14 | 1999-12-07 | Vacuum apparatus and fan casing with wear indicator |
Country Status (2)
Country | Link |
---|---|
US (1) | US6368066B2 (en) |
JP (1) | JP4309985B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202019105515U1 (en) * | 2019-10-07 | 2021-01-20 | Altrad Lescha Atika Gmbh | Leaf blower |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6450789B1 (en) | 2001-01-23 | 2002-09-17 | Timothy H. Henderson | Method and apparatus for inspecting vanes in a rotary pump |
US6877966B2 (en) | 2001-01-23 | 2005-04-12 | Timothy H. Henderson | Apparatus for indicating remaining life expectancy of a rotary sliding vane pump |
US6769886B2 (en) | 2001-01-23 | 2004-08-03 | Timothy H. Henderson | Rotary vane pump with vane wear access port and method |
US6945759B2 (en) * | 2003-04-01 | 2005-09-20 | Timothy H. Henderson | Engine driven dry air pump with a flange mounted oil drain |
US7216526B2 (en) * | 2003-06-03 | 2007-05-15 | Rapco, Inc. | Method and apparatus for measuring vane wear in a sliding vane rotary pump |
US20080276416A1 (en) * | 2007-05-08 | 2008-11-13 | Husqvarna Outdoor Products Inc. | Tube barrier |
JP2009085015A (en) | 2007-09-27 | 2009-04-23 | Kioritz Corp | Powered type suction device |
JP5052294B2 (en) | 2007-11-01 | 2012-10-17 | 株式会社やまびこ | Portable power suction device |
US9642508B1 (en) * | 2012-04-16 | 2017-05-09 | Billy Goat Indutries, Inc. | Debris-collecting apparatus and method of collecting debris |
US10352236B2 (en) * | 2013-10-30 | 2019-07-16 | United Technologies Corporation | Nosecap |
EP4248823A1 (en) | 2020-12-03 | 2023-09-27 | Yamabiko Corporation | Vacuum-separating compound tube, and vacuum cleaning machine and collecting machine utilizing same |
CN115224875B (en) * | 2021-04-21 | 2023-07-18 | 李钢 | Dust collector motor and working method thereof |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1289448A (en) * | 1959-11-03 | 1962-04-06 | Heating boiler associated with an addition and mixing device and method of regulating this boiler | |
US3849893A (en) * | 1972-02-04 | 1974-11-26 | Pioneer Centrifuging Co | Rotating machine wear gauging means and method |
US3968938A (en) * | 1974-09-10 | 1976-07-13 | Lambert Corporation | System for handling debris |
CA1096347A (en) * | 1979-05-17 | 1981-02-24 | Malcolm P. Ellis | Self cleaning fan housing |
US4325163A (en) | 1980-04-07 | 1982-04-20 | Allegretti & Company | Portable blower-vacuum unit |
US4479115A (en) * | 1982-08-06 | 1984-10-23 | At&T Bell Laboratories | Fan speed and/or fan failure detector |
US4694528A (en) * | 1986-07-18 | 1987-09-22 | The Toro Company | Convertible vacuum-blower |
GB2225814B (en) * | 1988-12-06 | 1993-03-24 | Johnston Eng Ltd | Fan impellers for road sweeping vehicles |
US5245726A (en) | 1991-07-22 | 1993-09-21 | Rote Scott J | Apparatus for picking up and shredding natural yard waste |
CN1073215C (en) * | 1992-07-11 | 2001-10-17 | 株式会社金星社 | Scroll housing structure of blower |
US5373688A (en) * | 1994-02-24 | 1994-12-20 | Weiss-Mcnair, Inc. | Nut harvester with dual debris exhausts on a single fan |
JP3128181B2 (en) | 1994-07-04 | 2001-01-29 | 株式会社共立 | Vacuum cleaner |
JPH0886299A (en) * | 1994-09-16 | 1996-04-02 | Nippondenso Co Ltd | Centrifugal blower |
US5545007A (en) * | 1994-11-25 | 1996-08-13 | United Technologies Corp. | Engine blade clearance control system with piezoelectric actuator |
US5639222A (en) * | 1995-07-06 | 1997-06-17 | Wagner Spray Tech Corporation | Close coupled series turbine mounting |
WO1997004872A1 (en) * | 1995-07-28 | 1997-02-13 | Wci Outdoor Products, Inc. | Portable lawn and garden mulching vacuum |
-
1998
- 1998-12-14 JP JP35469798A patent/JP4309985B2/en not_active Expired - Fee Related
-
1999
- 1999-12-07 US US09/456,836 patent/US6368066B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202019105515U1 (en) * | 2019-10-07 | 2021-01-20 | Altrad Lescha Atika Gmbh | Leaf blower |
Also Published As
Publication number | Publication date |
---|---|
US6368066B2 (en) | 2002-04-09 |
JP2000179497A (en) | 2000-06-27 |
JP4309985B2 (en) | 2009-08-05 |
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Owner name: KIORITZ CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AIYAMA, FUMIHIKO;TAKAHASHI, KAZUNORI;REEL/FRAME:010445/0405 Effective date: 19991129 |
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