US2439535A - Filter - Google Patents

Description

P" E. MYWILSON 2,439,535

FILTER Filed Sept. 16, 1944 2 Sheets-Sheet 2 la". m

I ELLSWORTH M. WILSON g 8 M.

ATTORNEYS.

Patented Apr. 13, 1948 FILTER aummh M.

to Remington Conn.,

Wilson, Southport,

Arms Company, a corporation of Delaware Conn., asslgnor Inc., Bridgeport,

. Application September 16, 1944, Serial No. 554,416 Claims. (Cl. 210-169) This invention relates to a filter assembly which may be used to advantage in washing'machines, and, particularly, those of the home dishwasher and home clothes-washing type. The device will be described in conjunction with a dish-washing machine, but it is to be distinctly understood that it may be used for other washing machines and other purposes. a

It is desirable to the aforementioned provide washing machines of type with a filter for removing foreign material in the water. This is particularly true of a dishwasher wherein a comparatively small amount of water is recirculated pump which requires removal of foreign material. The filter or strainer must be so arranged that it easily can be cleaned.

These and other objects of the invention may be seen from the following drawings and descrip- Fig. 2 is a sectional side elevation of the filter when in place in the machine of Fig. 1, debris or dirt being diagrammatically shown on the elements of the filter.

Fig. 3 is a vertical section taken along the line 33 of Fig. 2.

Fig. 4 is a broken vertical section taken along the line 4-4 of Fig.2.

Fig. 5 is 'similar to Fig. 2, with the exception that the filter rod assembly is partially withdrawn.

Fig. 6 is similar to Fig.

withdrawn.

Fig. 7 is similar to Fig. 6, with the exception that the cleaning and guide plate has been operated to remove debris from the assembly.

position in the machine.

Referring to Fig. 1, a dishwasher is shown having an outer casing 29 with a front door 2| and removable dish rack 22 held in tray support 23. A rotor 24 is driven by motor 23 for circulating a water spray upwardly about the dishes contained in dish basket 22. All of these features are conventional and may take this or other forms well known in the'art. The water returning from the spray is caught in the bottom 21 of the spray compartment 28 5, with the exception that the filter rod assembly has been completely and directed to the opening 29 so as to pass through thefilter assembly. During the washing cycle, water passing through the filter assembly enters the chamber 3| and is then carried into chamber 32 where it is drawn into the rotor 24 and again circulated over the dishes. Drain valve 33 is provided'for' removing water from the machine upon completion of the washing operation. This valve may be operated automatically or in any desired manner. Incoming water may be fed through the pipe 34 into compartment 35 wherein can be located a' heater element 36 for preheating the water before it is introduced .into the circulation system through valve 31, said valve particular machine and use for-which the filter is employed, and the term housing aperture includes various types of housings. During the rinsing portion of the washing cycle, or when the filter is not to be used, valve 10 may be provided and operated in any suitable manner for by-passing the filter. When port 29 is closed by valve 10, the water will follow passage 12 to chamber 3| and thence to the impeller 24 through chamber 32. Rinse water may be drained through the filter by operating valve 10 to close H and open valve 33 to a position closing the port to chamber 3 Referring to Fig. 2, the frame of the machine is shown at 30 with the chamber below the filter indicated at 3|. The filter comprises a front cover plate 39 having a handle 40- for removing the same from the front of the..machine frame 30. This cover may be so designed as to have a watertight joint ll with the frame of the machine, or a separate water-tight door may be provided in frame 30. Attached to the front cover plate 39 are rods 42 (Figs. 2 and 3). These rods parts in the position shown in Fig. 2. Detent 46 may consist of ball 41, spring 48 and plug 49 located in a suitable aperture in the rear guide rods being screwed, molded in, or otherwise fastened into the front cover plate 35. The rods may be of metal, plastic, or any suitable material. The rods may be arranged in various manners in accordance with the desired filter arrangement and may be spaced in accordance with the filter action desired. As shown in Fig. 3. the rods are arranged in diagonal rows and the central portion thereof omitted to form a basket as shown diagrammatically at 58, it is desirable to clean the filter. -The first operation is that shown in Fig. 5, wherein the front cover plate is pulled to the left, which moves with it the'rear guide plate 45 until said guide plate is stopped by retaining ledges 54 and 55. The guide plate is held in position by means of detents 55. Further movement to the left. or withdrawal (Fig. 6),

will separate the guide rods 42 and filter rods 1 5| from the rear guide plate 45, detents 45 allowing ring 43 to be withdrawn from aperture 44. Rear guide plate 45 may have the apertures receiving the filter rods 5| slightly countersunk, as shown at 60 in Fig. 6, with rods 5| loosely fitting in holes 6|.

The next operation in the cleaning of the filter is shown in Fig. 7, wherein the cleaning and rod guide plate 62 is moved to the rear in such a manner as to strip oil the dirt from the rods. The cleaning and rod guide plate 62 may have apertures 53, through which the rods 42 pass with a stop or annular shoulder made by having the aperture enlarged at the end facing the rear of the housing, so plate 62 will not be entirely withdrawn from the filter assembly because ring 45 will contact shoul- (ler 13. After the filter has been cleaned, the reassembly operation takes place, as shown in Fig. 8, wherein the cleaning and rod guide plate 62 is passed into the front opening 54 until it contacts the retaining ledges of the filter holder. and then as the cover 39 is moved to the right so as to move the rods 5|, the ends of said rods will be guided into their apertures 50 of the rear guide plate 45.

Further movement of the front cover plate to the right, as shown in Fig. 8, will move the rear guide plate 45 tothe right, from the detents 59 until the apparatus-takes the position shown in Fig. 2.

As previously stated, other forms and arrangements of the filter rods may be used and the filter may be employed by itself in a conduit or in conjunction with other machines.

that the front guide,

disengaging the same What isclaimed is:

1. In an apparatusincluding a filter chamber. an inlet to said filter chamber and an outlet therefrom; filter means adapted to be removably positioned in said chamber between said inlet and outlet, said filtering means comprising an assembly of a removable side wall of said chamber, a plurality of substantially parallel filter rods uniformly spaced from each other in a la teral direction, rigidly attached to said wall and extending therefrom across said chamber transversely ard laterally thereof, a cleaning plate provided with a plurality of apertures through which said rods pass, slidably mounted on said rods; and means in said chamber walls releasably engaging said cleaning plate to normally position it adjacent said removable wall, whereby when said filter assembly has been removed from said chamber said cleaning plate may be moved lengthwise of said rods to remove debris therefrom.

2. Apparatus according to claim' 1 comprising guide rods secured to said removable side wall in substantially parallel relation to said filter supporting plate carried by said filter rod supporting plate comrods, a filter rod guide rods, said prising means support the ends of said guide rods.

3. Apparatus according to claim 2 comprising detachable connections between said supporting plate and said guide rods whereby said supporting plate is moved across said filter chamber as said filter means is withdrawn therefrom.

4. Apparatus according to claim 3 in which said filter chamber comprises an abutment adapted to engage and stop said supporting plate after said movement across said filter chamber, said detachable connections enabling the separation of said filter means from said supporting plate when said supporting plate is engaged by said abutment.

5. Apparatus according to claim 4 comprising yieldable detent means adapted to retain said supporting plate adjacent said abutment while said guide rods are detached from and reconnected to said supporting plate.

ELlSWORTl-I M. wnlson.

REFERENCES crrEn 'The following references are of record in thefile of this patent:

UNITED STATES PATENTS adapted to receive and releasably

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