US3774418A - Integral self-cleaning filter and side check valve for automatic washer - Google Patents

Integral self-cleaning filter and side check valve for automatic washer Download PDF

Info

Publication number
US3774418A
US3774418A US00238890A US3774418DA US3774418A US 3774418 A US3774418 A US 3774418A US 00238890 A US00238890 A US 00238890A US 3774418D A US3774418D A US 3774418DA US 3774418 A US3774418 A US 3774418A
Authority
US
United States
Prior art keywords
liquid
diaphragm
filter
pump
washing machine
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
US00238890A
Other languages
English (en)
Inventor
W Ohmann
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.)
Whirlpool Corp
Original Assignee
Whirlpool 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 Whirlpool Corp filed Critical Whirlpool Corp
Application granted granted Critical
Publication of US3774418A publication Critical patent/US3774418A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/10—Filtering arrangements

Definitions

  • a diaphragm self-cleaning filter for a domestic appliance uses the non-filtering side of the diaphragm as a valve member and provides an integral check valve during flushing of the filter. Fluid pressure acts on the back side of the diaphragm to provide a biasing force.
  • any foreign matter carried by the liquid is entrapped in the orifices of the maze and eventually separated from the liquid.
  • the flexible diaphragm is urged away from the rigid wall 'member, thereby opening up the maze and allowing the laundry liquid to flow over the irregular surfaces and thereby clean and flush the filter.
  • U.S. Pat. No. 3,332,259 issued to Zylstra and also assigned to the assignee of the present application, describes a combination valve and filter assembly employing a movable flexible wall member-which is movable between a first position to create a filter maze and valve by allowing flow in one direction when a negative pressure is placed on the port and stopping flow when a positive pressure is placed on theport.
  • FIG. 1 is a schematic view of an automatic washing assembly, illustrating the water flow path through the filter and pump during the filtering operation;
  • FIG. 2 is a view similar to FIG. 1 but illustrating the water flow path through the filter and pump during the pump-out portion of the wash cycle;
  • FIG. 3 is a fragmentary cross-sectional view of the filter assembly showing the elements thereof during the filtering operation
  • FIG. 4 is a view similar to FIG. 3 but illustrating the condition existing du'ring pump-out
  • FIG. 5 is a view in elevation of the wall structure which cooperates with the flexible diaphragm to provide the filtering maze;
  • FIG. 6 is a cross-sectional view taken substantially along the line VIVI of FIG. 5 and further illustrating apositioning support and a pair of spring clips which hold the elements of the filter assembly together;
  • FIG. 7 is a fragmentary view of the upper portion of the flexible diaphragm more particularly illustrating the contoured surface thereof. 1
  • reference numeral 10 indicates generally an automatic washing machine of the vertical a second position where the filter maze is opened.
  • valves utilizing portions of the flexible wall member are operated by a mechanical linkage so as to be capable of movement independentof the flexible wall member.
  • the present invention is directed to a self-cleaning filter for automatic washing machine which includes a liquid impervious hollow housing member having an inlet in liquid communication with the laundry washing zone, and having a wall which has a port in liquid communication with the pump.
  • Included within the housing member is a filtering member composed of a flexible diaphragm having a contoured surface on one side thereof facing the aforementioned wall so that when a negative pressure is applied at the opening by'the pump the diaphragm abuts the wall forrninga filtering'maze for laundry liquid circulating therethrough.
  • a valve seat is formed at the inlet in the housing on the non-filtering side.
  • a positive pressure is applied by the pump causing the flexible diaphragm to distend into sealing relation against the valve seat, thereby opening up the maze so that wash liquid passing therethrough can pick up foreign particles which have been deposited during the filtering operation and flush them out through a drain.
  • the diaphragm has the dual function of cooperating with a stationary wall member in forming the filtering maze and acting as a valve member to cooperate with the valve seat, thereby acting as a check tory motion, the shaft 13 being driven by means of a motor 15 through a transmission 16.
  • the motor 15 also drives a pump 17 connected by means of a conduit 18 to a button trap 19, the button interior of the tub 11.
  • a conduit 20 connects the pump 17 to a filter generally indicated at reference numeral 21 which is mounted on the side of the tub 11 for purposes which will be evident as the description proceeds.
  • the filter has a drain outlet 22 and an inlet 23 in direct fluid communication with the interior of the tub 11.
  • the structure of the filtering element of the present invention is best illustrated in FIGS. 3 to 7 of the drawings.
  • the filter includes a housing composed of a pair of mating molded body members 24 and 25, both of body member 24 is secured to the tub 11 by means of a nut 27 and a sealing spacer 28.
  • the inlet 23 formed in the body member 24 has a collar portion 23a extending into the filtering chamber and forming a valve seat engagable with the flexible diaphragm 26 for purposes of developing a valving function in the control of flow through the inlet 23.
  • Body member 24 is further provided with braces 29 and 30 to align and support the filter assembly on the side of the tub 11.
  • the diaphragm 26 has spaced ribs 31 with grooves 32 extending therebetween, the ribs being angularly disposed so that they provide a tortuous path for the liquid being filtered during the filtering operation.
  • the ribs 31 are arranged to cooperate with baffles 33 formed in the body member 25 as best illustrated in FIGS. and 6 of the drawings. As also illustrated in FIG. 6, the body members 24 and 25 may be releasably clamped together to confine the diaphragm 26 therebetween, by means of a plurality of spring clips 34 and 35.
  • the body member 25 also carries a flapper type rubber check valve 36 which controls discharge into the drain outlet 22.
  • the suction from the pump draws the wash water from tub 11 through the inlet 23 into the filter unit.
  • Water then flows up behind the diaphragm 26, through a slot 37 provided in the diaphragm 26 and then through the filtering maze resulting from the engagement of the ribs 31 of the diaphragm with the baffles 33 in the body member 25.
  • the filters wash water is then passed through a port 38 and fitting 38a into the conduit 20 and to the pump 17.
  • the water is then pumped through the conduit 18 through the button trap 19 and back into the tub 11.
  • the check valve 36 is held closed by the suction of the pump acting on the valve during this filtering cycle.
  • the diaphragm 26 is held against baffles 33 during the filtering cycle by the negative pressure created by suction from the pump acting on the ribbed side of the diaphragm 26 and also by the water pressure from the tub l1 acting on the other side of the diaphragm through opening 23.
  • the pump 17 draws wash water from the tub 11 through the button trap 19 and pumps it into the filter through the port 38 creating a positive pressure on the filter side of diaphragm 26.
  • the positive pressure on the diaphragm 26 disengages the diaphragm from the baffles 33 and distends the flexible diaphragm 26 to sealingly engage the inlet 23 at the annular shoulder 23a.
  • the closing of the inlet 23 by the valve action of the diaphragm 26 prevents from being pumped back into the tub 11.
  • the stream of water circulating against the ribbed face of the diaphragm 26 flushes off and carries away any particles which had been trapped by the filtering operation.
  • the check valve 36 is open during this portion of the cycle, so that the wash water with the trapped particles of lint is flushed directly into the drain opening 22.
  • the diaphragm 26 thus cooperates with the baffles 33 during the filtering operation to provide a filtering maze when a suction is applied from the pump and acts as a check valve when positive pressure is applied from the pump, thereby obviating the necessity of incorporating a separate valve in the circuit.
  • the improved filter system of the present invention thus provides an inexpensive but reliable self-cleaning filter system which can be incorporated very readily on existing washing machines.
  • the new system makes a separate side check valve unnecessary and therefore eliminates some hose connections and provides fewer possibilities for leaks. Inasmuch as the water pressure from the tub acts on the back side of the diaphragm member, no springs are needed in order to keep the diaphragm against the baffles, thereby eliminating further parts as compared to the prior art.
  • a self-cleaning filter mounted in said circuit comprising a liquid impervious hollow housing member defining an inlet forming a valve seat and being in liquid communication with said treatment zone,
  • drain outlet having valve means for allowing fluid flow in one direction only
  • a filtering member disposed within said housing member and movable to a first position when said pump circulates liquid in said first direction to form a filter maze with said housing member for entrapping foreign particles from the liquid
  • said movement of said filter member being effected by variation in hydraulic pressure within said filter as said port is alternately in communication with the suction and discharge side of said pump.
  • said housing member comprises a first wall member and second wall member said first wall member having said inlet and said second wall member having said port and said drain outlet and said filtering member comprises a flexible diaphragm with means forming an opening for the passage of liquid through said diaphragm sandwiched between said first wall member and said second wall member.
  • baffles comprise rib members on said second wall member forming channels in open communication with said diaphragm, said channels having end wall means transversely interconnecting said rib members at the ends of the channels to close some of said channels to said port, and to close the remaining of said channels to said zone

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Filtration Of Liquid (AREA)
  • Reciprocating Pumps (AREA)
US00238890A 1972-03-28 1972-03-28 Integral self-cleaning filter and side check valve for automatic washer Expired - Lifetime US3774418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23889072A 1972-03-28 1972-03-28

Publications (1)

Publication Number Publication Date
US3774418A true US3774418A (en) 1973-11-27

Family

ID=22899745

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238890A Expired - Lifetime US3774418A (en) 1972-03-28 1972-03-28 Integral self-cleaning filter and side check valve for automatic washer

Country Status (4)

Country Link
US (1) US3774418A (enExample)
JP (1) JPS527868B2 (enExample)
AU (1) AU471699B2 (enExample)
CA (1) CA992003A (enExample)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346723A (en) * 1981-03-25 1982-08-31 Hobart Corporation Apparatus for a warewasher bypass soil collector
US4392891A (en) * 1980-07-02 1983-07-12 Hobart Corporation Dishwasher soil collecting circuit
US4468333A (en) * 1981-03-25 1984-08-28 Hobart Corporation Method for a warewasher bypass soil collector
US4566970A (en) * 1983-05-05 1986-01-28 Industrie Zanussi S.P.A. Washing machine filter
US5016296A (en) * 1990-01-16 1991-05-21 Beaumont M William Auxiliary drain and filler device for plastic pools
EP0441756A1 (en) * 1990-02-02 1991-08-14 Tajé, Luigi A self-cleaning filter for washing machines
US5827423A (en) * 1996-05-31 1998-10-27 Daewoo Electronics Co., Ltd. Filtering device for a washing machine
US6164976A (en) * 1999-02-04 2000-12-26 Mattel, Inc. Creativity center apparatus and method for use
US6634194B1 (en) 1999-12-30 2003-10-21 General Electric Company Washing machine overflow system
US20120048300A1 (en) * 2011-01-07 2012-03-01 General Electric Company Filtering method and related dishwasher
EP2443985A3 (de) * 2012-02-06 2012-07-25 V-Zug AG Haushaltsgerät mit Filteranordnung im Ablaufsystem
US10023991B2 (en) * 2013-07-09 2018-07-17 Samsung Electronics Co., Ltd. Washing machine
US11319659B2 (en) * 2018-12-28 2022-05-03 Whirlpool Corporation Button trap and sieve for a laundry appliance
US20240173655A1 (en) * 2022-11-25 2024-05-30 Samsung Electronics Co., Ltd. Microplastic filter for washing machines or other appliances

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282427A (en) * 1963-11-18 1966-11-01 Whirlpool Co Self-cleaning expansible diaphragm filter
US3332259A (en) * 1965-10-21 1967-07-25 Whirlpool Co Combination fluid filter and valve assembly
US3455456A (en) * 1968-01-26 1969-07-15 Gen Motors Corp Retractable pin lint filter
US3681947A (en) * 1971-03-23 1972-08-08 Whirlpool Co Combination drain manifold and self-cleaning filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282427A (en) * 1963-11-18 1966-11-01 Whirlpool Co Self-cleaning expansible diaphragm filter
US3332259A (en) * 1965-10-21 1967-07-25 Whirlpool Co Combination fluid filter and valve assembly
US3455456A (en) * 1968-01-26 1969-07-15 Gen Motors Corp Retractable pin lint filter
US3681947A (en) * 1971-03-23 1972-08-08 Whirlpool Co Combination drain manifold and self-cleaning filter

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392891A (en) * 1980-07-02 1983-07-12 Hobart Corporation Dishwasher soil collecting circuit
US4346723A (en) * 1981-03-25 1982-08-31 Hobart Corporation Apparatus for a warewasher bypass soil collector
US4468333A (en) * 1981-03-25 1984-08-28 Hobart Corporation Method for a warewasher bypass soil collector
US4566970A (en) * 1983-05-05 1986-01-28 Industrie Zanussi S.P.A. Washing machine filter
US5016296A (en) * 1990-01-16 1991-05-21 Beaumont M William Auxiliary drain and filler device for plastic pools
EP0441756A1 (en) * 1990-02-02 1991-08-14 Tajé, Luigi A self-cleaning filter for washing machines
US5827423A (en) * 1996-05-31 1998-10-27 Daewoo Electronics Co., Ltd. Filtering device for a washing machine
US6164976A (en) * 1999-02-04 2000-12-26 Mattel, Inc. Creativity center apparatus and method for use
US6634194B1 (en) 1999-12-30 2003-10-21 General Electric Company Washing machine overflow system
US20120048300A1 (en) * 2011-01-07 2012-03-01 General Electric Company Filtering method and related dishwasher
US8221554B2 (en) * 2011-01-07 2012-07-17 General Electric Company Filtering method and related dishwasher
EP2443985A3 (de) * 2012-02-06 2012-07-25 V-Zug AG Haushaltsgerät mit Filteranordnung im Ablaufsystem
US10023991B2 (en) * 2013-07-09 2018-07-17 Samsung Electronics Co., Ltd. Washing machine
US11319659B2 (en) * 2018-12-28 2022-05-03 Whirlpool Corporation Button trap and sieve for a laundry appliance
US11713534B2 (en) 2018-12-28 2023-08-01 Whirlpool Corporation Button trap and sieve for a laundry appliance
US20240173655A1 (en) * 2022-11-25 2024-05-30 Samsung Electronics Co., Ltd. Microplastic filter for washing machines or other appliances
US12427453B2 (en) * 2022-11-25 2025-09-30 Samsung Electronics Co., Ltd. Microplastic filter for washing machines or other appliances

Also Published As

Publication number Publication date
AU471699B2 (en) 1976-04-29
AU5197073A (en) 1974-08-08
CA992003A (en) 1976-06-29
JPS527868B2 (enExample) 1977-03-04
JPS4913980A (enExample) 1974-02-06

Similar Documents

Publication Publication Date Title
US3774418A (en) Integral self-cleaning filter and side check valve for automatic washer
US5493745A (en) Recirculation pump system for a washing machine
US3727435A (en) Self-cleaning lint filter for a recirculating clothes washer
US3810480A (en) Fluid control system
US4730630A (en) Dishwasher with power filtered rinse
CA1066078A (en) Combination drain sump and air pressure chamber for automatic clothes washing machine
US3282427A (en) Self-cleaning expansible diaphragm filter
US3847812A (en) Integral self-cleaning filter and side check valve for automatic washer
US3332259A (en) Combination fluid filter and valve assembly
US3305093A (en) Filter in domestic appliance
JP2008513092A5 (enExample)
CN114855429A (zh) 洗衣机的控制方法及洗衣机
CN108729148B (zh) 一种洗衣机泵及洗衣机
CN112726143B (zh) 排水阀及衣物处理装置
US2959286A (en) Self-cleaning filter system for automatic washer
CN112210967A (zh) 毛绒收集装置及其洗衣机
US3695291A (en) Suds saving system for automatic washer
CN216129839U (zh) 排水阀及家用电器
EP4613924A1 (en) Laundry treatment device and control method therefor
RU11224U1 (ru) Стиральная машина
US3335864A (en) Pressure actuated filter
US3275143A (en) Filter with cleaning means
KR20230001070U (ko) 다이어프램 작동식 배수펌프 유닛
SU1366569A1 (ru) Стиральна машина
CN112218567A (zh) 桶和包括这种桶的清洁系统