USRE40298E1 - Insulated box fan - Google Patents
Insulated box fan Download PDFInfo
- Publication number
- USRE40298E1 USRE40298E1 US10/425,274 US42527403A USRE40298E US RE40298 E1 USRE40298 E1 US RE40298E1 US 42527403 A US42527403 A US 42527403A US RE40298 E USRE40298 E US RE40298E
- Authority
- US
- United States
- Prior art keywords
- fan
- electrical insulator
- housing
- motor
- fan motor
- 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
Links
Images
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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
Definitions
- This invention relates to an insulated box fan of the type wherein the motor is electrically insulated from the rest of the fan by an isolator ring.
- Box fans are perhaps the most common fan in the industry. Historically, box fans are constructed of metal and plastic and are one of the least expensive fans, they provide a high volume of air, are of relatively light weight, are sturdy and long lasting, are versatile in that they can be placed on virtually any flat surface, and are stable and resist toppling.
- One of the problems from moisture laden air is that the water may provide a current leakage path to parts of the fan that come into contact with the user.
- Box fans typically mount the motor, which has a metal outer casing, directly to vertical metal brackets in the fan, so that if the motor casing is electrically charged, the fan housing will also become charged, and present a hazard to the user.
- the fan of the invention is designed to isolate the motor housing from the fan mounting brackets to prevent the fan housing from becoming electrically charged, and provides other positive advantages.
- the principal object of the invention is to provide a box fan that has a fan motor that is electrically insulated from the fan housing.
- a further object of the invention is to provide a box fan that is simple and inexpensive to construct.
- a further object of the invention is to provide a box fan which maintains the mechanical and structural integrity of the metal bracket portion of the fan.
- a further object of the invention is to provide a box fan wherein the basic fan housing structure is not modified, and which provides a slim streamlined box fan.
- a further object of the invention is to provide a box fan that can be safely placed in a window.
- a further object of the invention is to provide a box fan with improved air flow to the fan motor for better cooling.
- FIG. 1 is a front view of a box fan which incorporates the invention
- FIG. 2 is a fragmentary rear view of one embodiment of a portion of the box fan of FIG. 1 ;
- FIG. 3 is a vertical sectional view, taken approximately on the line 3 - 3 of FIG. 2 ;
- FIG. 4 is a front view of an isolator ring of the fan of FIG. 3 ;
- FIG. 5 is a view similar to FIG. 2 , illustrating another embodiment of a portion of a box fan
- FIG. 6 is a horizontal sectional view, taken approximately on the line 6 - 6 of FIG. 5 ;
- FIG. 7 is a front elevational view of an isolator ring used in the fan illustrated in FIG. 5 .
- a box fan 10 which has a front grill 11 , an outer rectangular fan housing 12 , a fan motor 14 , with a fan hub 15 , and a plurality of fan blades 16 extending therefrom.
- the front grill 11 is preferably of molded synthetic plastic and the fan housing 12 is preferably of stamped metal.
- a rear grill (not shown) would also be provided, which could having a design similar to front grill 11 .
- the fan housing 12 has a pair of spaced vertical brackets 20 extending from the top 21 of the housing 12 to the bottom 22 , which brackets 20 are preferably of metal, to add strength and rigidity to the fan housing 12 .
- fan motor 14 illustrated in detail in FIGS. 2 and 3 is a six (6) pole motor, which has a front casing 23 and a rear casing 24 .
- the rear casing 24 is of dish shape with a plurality of radial cutouts 25 .
- An isolator ring 30 is provided, which is of molded plastic, with polypropylene plastic being the preferred material.
- the isolator ring 30 is of dish shape, open in the center 31 , and includes a rim 32 with projections 33 , four being shown, and spaced with two at the top and two at the bottom.
- the motor casing 24 is attached to rim 32 by four screws 34 , which extend through rim 32 into threaded openings (not shown) in casing 24 .
- the rim 32 has openings 35 at the top and bottom with locating pins 36 therein, which extend from motor casing 24 .
- the projections 33 have screws 37 engaged therein, four being illustrated, which screws extend through openings (not shown) in brackets 20 , retaining ring 30 thereto.
- FIGS. 5-7 inclusive another embodiment of the invention is illustrated, with a four (4) pole motor 40 , which includes a front dish shaped casing 41 , and a rear dish shaped casing 42 .
- the motor 40 has an output shaft 43 with a blade hub 45 thereon.
- An isolator ring 50 is provided, which is of molded plastic with polypropylene plastic being preferred.
- the ring 50 has a wide rim 51 , with spaced openings 52 , which have screws 53 therein, four being illustrated, which extend therethrough into threaded openings 54 in casing 42 to retain motor 40 thereon.
- the configuration of the rim 51 has been found to better direct the air to cool the motor than with previous structures, and it has been found that the operating temperature of the fan motor may be lowered by as much as 2.5 degrees centigrade by use of the ring 50 .
- the rim 51 has four spaced 57 bosses thereon, which have openings 58 therein, and as shown in FIGS. 5 , 6 , have screws 59 therein, which screws 59 extend through openings (not shown) in the brackets 20 of a fan housing (not shown) similar to that described above, to retain the motor 40 thereon. While at least two screws are shown in each bracket 20 , variations can be used where the bracket could have an opening (not shown), which would have a tab (not shown) from the ring 50 engaged therein, and one screw 59 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (26)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/425,274 USRE40298E1 (en) | 1999-03-26 | 2003-04-29 | Insulated box fan |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/277,598 US6309192B1 (en) | 1999-03-26 | 1999-03-26 | Insulated box fan |
US10/425,274 USRE40298E1 (en) | 1999-03-26 | 2003-04-29 | Insulated box fan |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/277,598 Reissue US6309192B1 (en) | 1999-03-26 | 1999-03-26 | Insulated box fan |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE40298E1 true USRE40298E1 (en) | 2008-05-06 |
Family
ID=23061570
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/277,598 Ceased US6309192B1 (en) | 1999-03-26 | 1999-03-26 | Insulated box fan |
US10/425,274 Expired - Lifetime USRE40298E1 (en) | 1999-03-26 | 2003-04-29 | Insulated box fan |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/277,598 Ceased US6309192B1 (en) | 1999-03-26 | 1999-03-26 | Insulated box fan |
Country Status (1)
Country | Link |
---|---|
US (2) | US6309192B1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6585489B2 (en) | 2001-04-09 | 2003-07-01 | Lasko Holdings Inc. | Fan grill construction |
US6454537B1 (en) * | 2001-04-09 | 2002-09-24 | Lasko Holdings, Inc. | Fan grill construction |
US7419368B2 (en) * | 2002-01-04 | 2008-09-02 | Fan-Tastic Vent Corporation | Air circulation device |
US20050093387A1 (en) * | 2003-10-29 | 2005-05-05 | Yung Chen | Electrical insulation arrangements for electric fans, motor assemblies and controls therefor |
US6894897B1 (en) | 2003-12-12 | 2005-05-17 | Lockheed Martin Corporation | Structure-borne noise isolation technique and apparatus for fans and blowers |
US7762765B2 (en) * | 2007-04-19 | 2010-07-27 | Fan-Tastic Vent | Fan with attachment hooks |
US7731574B2 (en) * | 2007-06-08 | 2010-06-08 | Fan-Tastic Vent | Mechanism for opening a vent cover |
US7731249B2 (en) * | 2007-06-08 | 2010-06-08 | Fan-Tastic Vent | Mechanism for locking a vent cover with a base |
US8192179B2 (en) * | 2007-10-24 | 2012-06-05 | Sunbeam Products, Inc. | Method and apparatus for isolating a motor of a box fan |
BE1022032B1 (en) * | 2013-07-12 | 2016-02-05 | Advanced Spring Technology, Naamloze Vennootschap | FOAM CONSTRUCTION AND MATTRESS OR CUSHION THEREOF |
US20160157629A1 (en) * | 2013-07-12 | 2016-06-09 | Advanced Spring Technology, Naamloze Vennootschap | Foam construction and mattress or pillow provided therewith |
CN104976158A (en) * | 2014-04-09 | 2015-10-14 | 珠海格力电器股份有限公司 | Fan |
CN105402166B (en) * | 2015-09-30 | 2018-01-30 | 广东美的环境电器制造有限公司 | Housing and box fans and its assembly method for box fans |
US11946488B2 (en) * | 2021-06-09 | 2024-04-02 | Glenn B. Smith | Fruit or vegetable shaped fan for dispersing airborne eye irritants |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2867377A (en) * | 1957-04-22 | 1959-01-06 | Lasko Metal Products Inc | Fan assembly |
US3310698A (en) * | 1964-02-11 | 1967-03-21 | Imc Magnetics Corp | Machine frame for an electric motor |
US4086785A (en) * | 1977-01-17 | 1978-05-02 | General Motors Corporation | Two-piece fan motor mounting arrangement |
US4120615A (en) * | 1977-02-04 | 1978-10-17 | Allware Agencies Limited | Box fans |
US4350472A (en) * | 1978-11-14 | 1982-09-21 | Sanyo Electric Co., Ltd. | Electric fan apparatus |
US4636669A (en) * | 1984-10-29 | 1987-01-13 | Msl Industries, Inc. | Termination assembly for electric fans |
US5061405A (en) * | 1990-02-12 | 1991-10-29 | Emerson Electric Co. | Constant humidity evaporative wicking filter humidifier |
US5788566A (en) * | 1996-10-29 | 1998-08-04 | Dell U.S.A., L.P. | Integrated cooling fan and finger guard assembly |
US5879232A (en) * | 1997-03-25 | 1999-03-09 | Tomkins Industries, Inc. | Exhaust fan |
US5955955A (en) * | 1994-12-06 | 1999-09-21 | Corcoran, Jr.; William L. | Drive-bay mounted cooling device |
US6015265A (en) * | 1998-08-31 | 2000-01-18 | Lasko Holdings, Inc. | Box fan with air divider ring |
US6227822B1 (en) * | 1998-10-20 | 2001-05-08 | Lakewood Engineering And Manufacturing Co. | Fan with improved electric motor and mounting |
-
1999
- 1999-03-26 US US09/277,598 patent/US6309192B1/en not_active Ceased
-
2003
- 2003-04-29 US US10/425,274 patent/USRE40298E1/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2867377A (en) * | 1957-04-22 | 1959-01-06 | Lasko Metal Products Inc | Fan assembly |
US3310698A (en) * | 1964-02-11 | 1967-03-21 | Imc Magnetics Corp | Machine frame for an electric motor |
US4086785A (en) * | 1977-01-17 | 1978-05-02 | General Motors Corporation | Two-piece fan motor mounting arrangement |
US4120615A (en) * | 1977-02-04 | 1978-10-17 | Allware Agencies Limited | Box fans |
US4350472A (en) * | 1978-11-14 | 1982-09-21 | Sanyo Electric Co., Ltd. | Electric fan apparatus |
US4636669A (en) * | 1984-10-29 | 1987-01-13 | Msl Industries, Inc. | Termination assembly for electric fans |
US5061405A (en) * | 1990-02-12 | 1991-10-29 | Emerson Electric Co. | Constant humidity evaporative wicking filter humidifier |
US5955955A (en) * | 1994-12-06 | 1999-09-21 | Corcoran, Jr.; William L. | Drive-bay mounted cooling device |
US5788566A (en) * | 1996-10-29 | 1998-08-04 | Dell U.S.A., L.P. | Integrated cooling fan and finger guard assembly |
US5879232A (en) * | 1997-03-25 | 1999-03-09 | Tomkins Industries, Inc. | Exhaust fan |
US6015265A (en) * | 1998-08-31 | 2000-01-18 | Lasko Holdings, Inc. | Box fan with air divider ring |
US6227822B1 (en) * | 1998-10-20 | 2001-05-08 | Lakewood Engineering And Manufacturing Co. | Fan with improved electric motor and mounting |
Also Published As
Publication number | Publication date |
---|---|
US6309192B1 (en) | 2001-10-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CC | Certificate of correction | ||
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: LASKO OPERATION HOLDINGS, LLC, PENNSYLVANIA Free format text: CONVERSION;ASSIGNOR:LASKO HOLDINGS, INC.;REEL/FRAME:040634/0705 Effective date: 20161108 |
|
AS | Assignment |
Owner name: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS AGENT, Free format text: SECURITY INTEREST;ASSIGNOR:LASKO OPERATION HOLDINGS, LLC;REEL/FRAME:040659/0875 Effective date: 20161118 |
|
AS | Assignment |
Owner name: HPS INVESTMENT PARTNERS, LLC, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:LASKO OPERATION HOLDINGS LLC;REEL/FRAME:040671/0891 Effective date: 20161118 |
|
AS | Assignment |
Owner name: LASKO HOLDINGS, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LITVIN, CHARLES;REEL/FRAME:040472/0181 Effective date: 19990503 |