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US3653807A
Expired / Lapsed
US
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Method and means for shredding and filtering lint in a washing machine
Assignee: Whirlpool Corp
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Filing: 1970-08-24
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Granted: 1972-04-04
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Expires: 1990-08-24
Abstract
Abstract Method and apparatus for treating lint in an automatic washing machine assembly, the apparatus including a shredder which continuously chops up strands of lint before delivering the same to the washing machine filter, and then operates to chop up lint which is back-flushed from the filter before discharging the same.
Inventors
- 👤 Clark I Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:54
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/10; D06F37/00; D06F37/02; D06F37/12; D06F37/14; D06F37/145
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
16 words
The assembly of claim 1 including means for filtering the washing fluid withdrawn from said tub.
Claim 2
Dependent Claim
19 words
The assembly of claim 1 wherein said pump and said shredding means are operated from a common drive means.
Claim 3
Dependent Claim
67 words
In an automatic washer assembly including a tub for containing washing fluid, a pump for withdrawing fluid from said tub, means for driving said pump, a lint filter, and means defining a fluid flow path connecting said tub, said pump, and said filter, the improvement comprising shredding means driven by said pump drive means and interposed in said flow path so as to shred lint passing therethrough.
Claim 4
Dependent Claim
26 words
The assembly of claim 4 including means for receiving washing fluid after it has passed through shredding means and discharging said fluid from said washing assembly.
Claim 5
Dependent Claim
21 words
The assembly of claim 4 wherein said shredding means and said pump are disposed in separate compartments within a common housing.
Claim 6
Dependent Claim
99 words
An automatic washing assembly comprising: a tub; a pump which may be energized in a first mode to withdraw washing fluid from and subsequently return said fluid to said tub, and in a second mode to withdraw said fluid from said tub and discharge said fluid to drain; shredding means operated jointly with said pump to shred lint in the washing fluid withdrawn from said tub; filter means for receiving the washing fluid bearing the shredded lint and removing said lint from said fluid; and fluid conduit means connecting said tub, said shredding means, said filter, and said pump.
Claim 7
Dependent Claim
13 words
The assembly of claim 7 wherein said pump is a reversible flow pump.
Claim 8
Dependent Claim
37 words
The assembly of claim 7 in which the impeller of said pump and said shreddiNg means are positioned on a common shaft, said impeller and said shredding means being located in separate compartments within a common housing.
Claim 9
Dependent Claim
132 words
An automatic washing apparatus having a fluid circulation system comprising: a tub having at least two fluid outlets; a check valve located at a first of said outlets, said valve having three ports, a first of which is connected to said first tub outlet; fluid conduit means connected to a second port of said valve and arranged to discharge washing fluid from said washing apparatus; shredding means connected by fluid conduit means to the third port of said valve; filter means connected by fluid conduit means to said shredding means; and a pump having a first port communicating with said filter and a second port communicating with the second outlet of said tub, said pump and said shredding means being driven jointly and being located within separate compartments of a common housing.
Claim 10
Independent Claim
77 words
The method of handling lint in an automatic washing machine having a tub in which the articles are washed, which comprises: withdrawing lint bearing wash liquid from said tub, shredding the lint in said wash liquid, filtering lint from the shredded lint bearing wash liquid, pumping the resulting filtrate back into said tub, back-flushing the filter at predetermined intervals, shredding the lint in the liquid resulting from said back-flushing, and discharging the shredded lint from said machine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |