US3696521A - Laundry dryer - Google Patents

Laundry dryer Download PDF

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Publication number
US3696521A
US3696521A US101308A US3696521DA US3696521A US 3696521 A US3696521 A US 3696521A US 101308 A US101308 A US 101308A US 3696521D A US3696521D A US 3696521DA US 3696521 A US3696521 A US 3696521A
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US
United States
Prior art keywords
drum
receptacle
smaller
cabinet
fabrics
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
Application number
US101308A
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English (en)
Inventor
James R Hubbard
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Application granted granted Critical
Publication of US3696521A publication Critical patent/US3696521A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 

Definitions

  • This invention is concerned with household laundry apparatus and especially with improvements in laundry dryers of the kind having a clothes-containing drum rotatable about a horizontal axis.
  • a clothes load may contain a variety of fabrics which require different conditions for optimum drying. For example different drying times and temperatures are desirable for fabrics of different types, and a degree of tumble agitation which is optimum for one type of fabric may not be the best for others. Frequently this is the case with more delicate fabrics.
  • the result has been impairment of drying efficiency, particularly if a small load of delicate fabrics is to be dried in a large drum.
  • the apparatus of the invention is featured by the ease with which the smaller drum may be loaded and installed within the larger and by the fact that provision of the two drums requires no major changes in drive means, controls or heating circuits.
  • this invention provides a dryer construction having a small drum within which delicate fabrics may be dried, and which drum may readily be associated with or detached from the machine to meet various drying requirements.
  • the invention is featured by the fact that, while each drum is driven at a speed suitable to promote tumbling of the clothes therein, the smaller drum derives its movement wholly from the larger drum.
  • FIG. 1 is a perspective illustration of a horizontalaxis laundry dryer embodying the invention
  • FIG. 2 is a side sectional-elevational view showing portions of the dryer of FIG. 1 on a larger scale;
  • FIG. 3 is a perspective illustration of the smaller drying drum shown disassociated from the drying machine
  • FIG. 4 is an exploded view illustrating features of construction of the smaller drum and showing the manner in which it may be removably associated with the door of the dryer cabinet;
  • FIG. 5 is a front elevational view of the two drums used in the machine, showing the drums disassociated from the dryer and illustrating the preferred manner of driving the smaller drum.
  • the illustrated laundry dryer 10 comprises a generally rectangular cabinet 11 provided with a first, larger, open-end receptacle or drum 12 which ismounted within the cabinet through the agency of suitable bearing means 13-14 (FIG. 2).
  • the open end of this drum confronts an aperture 15 provided in the forward portion of the cabinet, as is seen in FIG. 1.
  • Suitable door structure for example the swinging door shown at 16, is mounted on the cabinet for movements between a closed position (FIG. 2), in which it confronts the open end of the drum 12, and an open position in which access may be had to said drum.
  • a suitable latch would be provided to hold the door 16 in closed position.
  • the drum 12 is of cylindrical shape and its periphery is formed of imperforate sheet steel.
  • Baffles 17 provide for tumbling of the clothes within the drum l2.
  • Resistive heater means shown diagrammatically at 18 in FIG. 2, is provided to heat the air which dries the clothes and it will be understood that the apparatus would further include motor means (not shown) for rotating the drum, for example, through the agency of a belt 19 which surrounds the drum.
  • Air propelling means shown diagrammatically as a fan identified at F, is provided for moving the air upwardly past the heater l8, thence through the perforated rear wall 20 of the drum and into contact with clothes contained therein.
  • the main drum and drive apparatus is conventional.
  • the circulating air flows toward the forward part of the drum l2 and, when the smaller drum to which detailed reference will be madehereinafter is not in place, exits directly through the open end of drum 12 and through perforations provided in the rear wall 21 of cabinet door 16.
  • the air completes its circulatory flow by passing downwardly through lint collecting means shown at 22 and thence to a suitable exit (not shown).
  • the dryer is provided with a second receptacle or drum 23, smaller than the first drum.
  • This second drum which may conveniently be fabricated of molded plastic material to minimize the weight thereof, is provided with a fixed end wall 24 which is perforated, and with a removable perforated cap or wall 25 which is flanged, as shown at 26, (see particularly FIG. 4) releasably to retain the cap on the drum.
  • the removable cap 25 provides access to drum 23, in the manner shown in FIG. 4, and serves also to retain a lint filter 27. This filter is supported between the removable cap wall 25 and a flanged portion 28 of smaller drum 23.
  • the smaller drum is provided with baffles 29 which may be conventional in nature.
  • Drum 23 is removably and rotatably supported upon the door 16 and, for this purpose, the end wall 24 of drum 23 is provided with an extemalIy-splined shaft 30 which is receivable within an internally splined hollow shaft or socket structure 31 mounted in the door 16 through the agency of a journal 32 and a set of bearings 33.
  • the end wall 24 of the smaller drum is provided with a flange 240 which seats against the front of the cabinet, as shown at 24b in FIG. 1, to prevent inadvertent dislodgement of the drum 23 when it is in use.
  • the journal 32 is so located and secured within the door that the socket structure 31 defines a rotational axis A for the smaller drum which is eccentric with respect to the axis B of the larger drum (FIG. 2).
  • smaller drum 23 may readily be associated with and disassociated from the door and access may be had to its interior through the cap structure 25, 26. If desired, means (not shown) may be provided to cover the internally splined socket structure 31 when the smaller drum is not in use.
  • the wall 21 of the door is also perforated, as shown at 21a in FIG. 1, in a lower region which is not covered by the smaller drum when the latter is in place. This permits some outflow of air directly from the larger drum, even if the smaller drum is in use.
  • the larger drum 12 may, for example, have a diameter of about 29 inches and its forward access opening 15a may have a diameter of about 18 inches. As shown below, when a larger drum having these dimensions is used, the smaller drum 23 will have a diameter of about 12 inches. A drum of this size is readily insertable within the larger drum when the door 16 is swung from the position shown in FIG. 1 to the position shown in FIG. 2.
  • the larger drum is driven through the belt 19 and drive motor (not shown) at a speed suitable to cause tumbling of fabrics contained therein, for example about 48 rpm, for a 29 inch drum.
  • This speed, and use of appropriate baffles, provides a satisfactory tumble pattern.
  • any convenient means may be employed for driving the smaller drum at the proper tumble speeds.
  • a drive connection between the drums is established automatically when the second drum is positioned within the first, and it is highly advantageous that the smaller drum be driven by the larger drum.
  • Frictional drive means may be interposed between the two drums, with the resultant advantage of low noise, but I prefer to use an internal gear secured to the larger drum l2 and extending around its opening 15a.
  • This gear may comprise an internally toothed belt of suitable material, for example plastic material.
  • An external gear is provided also preferably as a belt and extends about the periphery of the smaller drum, adjacent the region in which it is supported by the door.
  • the gearing arrangement appears to best advantage in FIGS. 1 and 5.
  • the external belt gear 34 is secured in any suitable fashion, about the periphery of smaller drum 23, while the internal belt gear 35 extends and is secured by any convenient means around the access opening 15a of the larger drum and lies generally in the plane of said access opening, which is in registry with the opening in the forward wall of the cabinet.
  • the gear teeth provided on the two belts need not be precisely formed, preferably they are of approximately involute shape.
  • the door 16 carrying the smaller drum is swung toward theclosed position the external teeth of gear ring 34 are brought into engagement with the internal teeth of ring 35.
  • the two drums are shown in FIG. 5 disassociated from the cabinet, and a portion of the forward wall of drum 12, which wall defines the drum opening 15a, is shown broken away to illustrate the engagement between the gears 34 and 35. If necessary the ends of the teeth may be bevelled to accommodate engagement and disengagement thereof.
  • a drum 29 inches in diameter must be rotated at about 48 rpm to achieve a value of centrifugal force within the drum which is slightly less than the force of gravity.
  • a value for centrifugal force slightly less than gravity is required for proper tumbling in a horizontal axis clothes dryer.
  • the smaller drum must be of a diameter such that it will pass freely into the larger drum.
  • the diameter of the smaller drum also must be so chosen that it rotates at a speed which results in a value of centrifugal force within said smaller drum which is slightly less than the force of gravity. As shown below, a smaller drum 12 inches in diameter meets these conditions.
  • the speed of rotation of the larger drum multiplied by the ratio of the diameters of the two gears, equals the speed of rotation of the smaller drum.
  • the value given above for the diameter of the smaller drum (12 inches) should be understood as comprising the diameter of the pitch circle of its external gear.
  • the diameter of the opening 15a 18 inches) should be understood as being the diameter of the pitch circle of the internal gear carried by the larger drum.
  • the larger drum carries an internal gear which is concentric therewith and is 18 inches in diameter, and since the diameter of the external gear is approximately equal to that of the smaller drum, the speed of rotation of the smaller drum is 48 X 18/ l 2 72 rpm. This can be shown to yield a value for centrifugal force which is in the region of 0.9 G, and proper tumbling is achieved.
  • a first open-end receptacle means supporting said receptacle for rotation about a generally horizontal axis; door structure movable between a closed position in which it confronts the open end of said receptacle and an open position in which access may be had to said receptacle; a second receptacle smaller than said first receptacle;
  • a clothes dryer comprising: a cabinet; an openend drum rotatably supported by said cabinet, said cabinet having an opening in registry with the open end of said drum; a door normally closing said opening in said cabinet and movable to a position in which access may be had to the interior of said drum; and a second smaller drum carried by said door and normally disposed within the larger drum; the construction and arrangement being such that clothes contained within each of said drums are subjected to drying air circulating through the cabinet, and provision is made to rotate said drums simultaneously each at a speed suitable to produce tumbling of clothes therein.
  • a main drum rotatable about a substantially horizontal axis; means for driving said main drum at a speed suitable to tumble fabrics therein; a smaller drum disposed within the main drum and rotatable about a substantially horizontal axis eccentric with respect to the axis about which said main drum is rotatable; and means establishing a driving connection between said main drum and said smaller drum, said driving connection being such that said smaller drum is driven by said main drum at a speed higher than that of said main drum and suitable to tumble fabrics in said smaller drum.
  • said driving connection comprises: an internal gear carried by and concentric with the axis of rotation of said main drum; and an external gear carried by and concentric with the axis of rotation of said smaller drum and in driven engagement with said internal gear.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US101308A 1970-12-24 1970-12-24 Laundry dryer Expired - Lifetime US3696521A (en)

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US10130870A 1970-12-24 1970-12-24

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CA (1) CA950187A (it)
IT (1) IT945623B (it)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3840998A (en) * 1973-08-29 1974-10-15 Whirlpool Co Removable clothers basket for dryer
US4476019A (en) * 1983-03-16 1984-10-09 The Black Clawson Company Pellet dryer
US4617743A (en) * 1985-01-28 1986-10-21 Richard Barnard Dryer insert, holder, container
GB2246624A (en) * 1990-08-03 1992-02-05 Mayc Sa Tumble-drier filter coupling device
US5127169A (en) * 1991-01-25 1992-07-07 Maytag Corporation Clothes dryer
US5555645A (en) * 1993-03-31 1996-09-17 White Consolidated Industries, Inc. Reversing clothes dryer and method therefor
GB2308430A (en) * 1995-12-20 1997-06-25 Aeg Hausgeraete Gmbh Tumble drier with a rotatably mounted laundry drum
US6212792B1 (en) * 1999-07-01 2001-04-10 Rosalie J. Bier Basket and method of use
EP1405945A2 (en) * 2002-10-02 2004-04-07 Electrolux Home Products Corporation N.V. Improved clothes drying machine
US20070256322A1 (en) * 2006-04-27 2007-11-08 Daewoo Electronics Corporation Dryer having heater-installed suction duct
WO2008052976A1 (en) * 2006-10-31 2008-05-08 Arcelik Anonim Sirketi A washer/dryer
US20090083991A1 (en) * 2007-09-28 2009-04-02 Mabe Canada Inc. Clothes dryer bearing gasket support
US20090100696A1 (en) * 2006-03-17 2009-04-23 Bsh Bosch Und Siemens Hausgerate Gmbh Device For Drying A Textile Containing A Filling That Is Likely To Form Clumps
US8042282B2 (en) * 2006-02-27 2011-10-25 Lg Electronics Inc. Drum for clothes dryer
US8046933B2 (en) * 2006-10-02 2011-11-01 Lg Electronics Inc. Apparatus for detecting a belt-cutoff of dryer and method for detecting the same
US20120023770A1 (en) * 2009-03-04 2012-02-02 James Anthony Doubtfire Tumble air dryer
EP2415921A1 (en) * 2010-08-06 2012-02-08 Fagor, S. Coop. Washing machine with a door comprising a cavity adapted to house a load
CN104805630A (zh) * 2014-01-29 2015-07-29 Lg电子株式会社 具有多个外桶的洗衣机
CN104975476A (zh) * 2014-04-11 2015-10-14 三星电子株式会社 洗衣机
KR101592318B1 (ko) * 2014-12-09 2016-02-05 엘지전자 주식회사 건조기
CN105821626A (zh) * 2015-01-04 2016-08-03 青岛海尔滚筒洗衣机有限公司 一种可降低衣物摩擦的滚筒洗衣机
EP3489405A4 (en) * 2016-08-25 2019-07-17 Samsung Electronics Co., Ltd. WASHING MACHINE
EP3530799A1 (en) * 2018-02-23 2019-08-28 LG Electronics Inc. -1- Clothes dryer comprising a door with a second drum
US11319662B2 (en) * 2020-02-11 2022-05-03 Chuck DEWALD Drying apparatus and drum

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1005342A (en) * 1909-03-06 1911-10-10 Roy B Simpson Ice-cream freezer.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1005342A (en) * 1909-03-06 1911-10-10 Roy B Simpson Ice-cream freezer.

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3840998A (en) * 1973-08-29 1974-10-15 Whirlpool Co Removable clothers basket for dryer
US4476019A (en) * 1983-03-16 1984-10-09 The Black Clawson Company Pellet dryer
US4617743A (en) * 1985-01-28 1986-10-21 Richard Barnard Dryer insert, holder, container
GB2246624A (en) * 1990-08-03 1992-02-05 Mayc Sa Tumble-drier filter coupling device
GB2246624B (en) * 1990-08-03 1994-09-28 Mayc Sa Tumble drier filter coupling device
US5127169A (en) * 1991-01-25 1992-07-07 Maytag Corporation Clothes dryer
US5555645A (en) * 1993-03-31 1996-09-17 White Consolidated Industries, Inc. Reversing clothes dryer and method therefor
GB2308430B (en) * 1995-12-20 2000-04-26 Aeg Hausgeraete Gmbh Tumble drier with a rotatably mounted laundry drum
GB2308430A (en) * 1995-12-20 1997-06-25 Aeg Hausgeraete Gmbh Tumble drier with a rotatably mounted laundry drum
US6212792B1 (en) * 1999-07-01 2001-04-10 Rosalie J. Bier Basket and method of use
EP1405945A2 (en) * 2002-10-02 2004-04-07 Electrolux Home Products Corporation N.V. Improved clothes drying machine
EP1405945A3 (en) * 2002-10-02 2006-03-29 Electrolux Home Products Corporation N.V. Improved clothes drying machine
US8042282B2 (en) * 2006-02-27 2011-10-25 Lg Electronics Inc. Drum for clothes dryer
US20090100696A1 (en) * 2006-03-17 2009-04-23 Bsh Bosch Und Siemens Hausgerate Gmbh Device For Drying A Textile Containing A Filling That Is Likely To Form Clumps
US20070256322A1 (en) * 2006-04-27 2007-11-08 Daewoo Electronics Corporation Dryer having heater-installed suction duct
US8046933B2 (en) * 2006-10-02 2011-11-01 Lg Electronics Inc. Apparatus for detecting a belt-cutoff of dryer and method for detecting the same
US8776395B2 (en) 2006-10-31 2014-07-15 Arcelik Anonim Sirketi Washer/dryer
US20100050463A1 (en) * 2006-10-31 2010-03-04 Hakan Tatar Washer/Dryer
WO2008052976A1 (en) * 2006-10-31 2008-05-08 Arcelik Anonim Sirketi A washer/dryer
US20090083991A1 (en) * 2007-09-28 2009-04-02 Mabe Canada Inc. Clothes dryer bearing gasket support
US8028439B2 (en) * 2007-09-28 2011-10-04 Mabe Canada Inc. Clothes dryer bearing gasket support
US20120023770A1 (en) * 2009-03-04 2012-02-02 James Anthony Doubtfire Tumble air dryer
EP2415921A1 (en) * 2010-08-06 2012-02-08 Fagor, S. Coop. Washing machine with a door comprising a cavity adapted to house a load
CN104805630B (zh) * 2014-01-29 2017-07-07 Lg电子株式会社 具有多个外桶的洗衣机
CN104805630A (zh) * 2014-01-29 2015-07-29 Lg电子株式会社 具有多个外桶的洗衣机
EP2902541A1 (en) * 2014-01-29 2015-08-05 LG Electronics Inc. Washing machine having a plurality of tubs
KR20150090768A (ko) * 2014-01-29 2015-08-06 엘지전자 주식회사 복수 개의 터브를 구비하는 세탁기
US10280546B2 (en) 2014-01-29 2019-05-07 Lg Electronics Inc. Washing machine having a plurality of tubs
US9926659B2 (en) 2014-01-29 2018-03-27 Lg Electronics Inc. Washing machine having a plurality of tubs
US10184200B2 (en) 2014-04-11 2019-01-22 Samsung Electronics Co., Ltd. Washing machine
US9856593B2 (en) 2014-04-11 2018-01-02 Samsung Electronics Co., Ltd. Washing machine
CN104975476A (zh) * 2014-04-11 2015-10-14 三星电子株式会社 洗衣机
CN104975476B (zh) * 2014-04-11 2018-04-24 三星电子株式会社 洗衣机
KR101592318B1 (ko) * 2014-12-09 2016-02-05 엘지전자 주식회사 건조기
AU2015268564B2 (en) * 2014-12-09 2017-01-05 Lg Electronics Inc. Dryer
EP3031969A1 (en) * 2014-12-09 2016-06-15 LG Electronics Inc. Dryer
CN105696283B (zh) * 2014-12-09 2018-04-24 Lg电子株式会社 烘干机
CN105696283A (zh) * 2014-12-09 2016-06-22 Lg电子株式会社 烘干机
US9765471B2 (en) 2014-12-09 2017-09-19 Lg Electronics Inc. Dryer
CN105821626B (zh) * 2015-01-04 2020-06-09 青岛海尔滚筒洗衣机有限公司 一种可降低衣物摩擦的滚筒洗衣机
CN105821626A (zh) * 2015-01-04 2016-08-03 青岛海尔滚筒洗衣机有限公司 一种可降低衣物摩擦的滚筒洗衣机
EP3489405A4 (en) * 2016-08-25 2019-07-17 Samsung Electronics Co., Ltd. WASHING MACHINE
US11414801B2 (en) 2016-08-25 2022-08-16 Samsung Electronics Co., Ltd. Drum washing machine
EP3530799A1 (en) * 2018-02-23 2019-08-28 LG Electronics Inc. -1- Clothes dryer comprising a door with a second drum
US20190264378A1 (en) * 2018-02-23 2019-08-29 Lg Electronics Inc Clothes dryer
US10895034B2 (en) * 2018-02-23 2021-01-19 Lg Electronics Inc. Clothes dryer
US11319662B2 (en) * 2020-02-11 2022-05-03 Chuck DEWALD Drying apparatus and drum

Also Published As

Publication number Publication date
CA950187A (en) 1974-07-02
IT945623B (it) 1973-05-10

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