US3567032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and pump for a recirculating sanitary system
Assignee: Monogram Industries Inc
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Filing: 1969-06-02
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Granted: 1971-03-02
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Expires: 1989-06-02
Abstract
Abstract In a recirculating sanitary system, an improved filter and pump assembly provides a source of flushing liquid. A diaphragm pump is provided with a coupling to a plurality of needle members that reciprocate through an apertured plate. The needle members extend beyond the plate into the storage tank at all times, and the reciprocating motion imparted to the needle members tends to clean the needle-aperture combination, which acts as the filter. The pump also supplies a limited backflow through the filter for cleaning purposes during a portion of the operating cycle. In addition, a novel, pneumatic timing device assures the completion of an operating cycle.
Inventors
- 👤 James M Kemper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:40
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/016; B; B01; B01D; B01D29/00; B01D29/01; B01D29/03; B01D35/00; B01D35/26; Y; Y10; Y10S; Y10S4/00; Y10S4/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A pump filter comprising: a. pumping means having an intake and including a source of reciprocating motion; b. filter plate means interposed between said pumping means intake and a supply of liquid to be filtered and pumped, said filter plate means having at least one aperture communicating with the supply; c. needle means including at least one needle member positioned in said aperture to restrict the flow of liquid therethrough; d. motion transmission means for coupling said source of reciprocating motion to said filter plate and needle means for imparting relative motion therebetween; whereby said needle member and said plate aperture are in motion relative to each other, and whereby all fluid flow into said pumping means intake is through said aperture partially blocked by said needle member acting in combination as a filter.
Claim 2
Dependent Claim
134 words
A pump filter comprising: a. pumping means having an intake and including a source of reciprocating motion; b. filter plate means interposed between said pumping means intake and a supply of liquid to be filtered and pumped, said filter plate means having at least one aperture communicating with the supply; c. needle means including at least one needle member positioned in said aperture to restrict the flow of liquid therethrough; d. motion transmission means for coupling said source of reciprocating motion to said filter plate and needle means for imparting relative motion therebetween; whereby said needle member and said plate aperture are in motion relative to each other, and whereby all fluid flow into said pumping means intake is through said aperture partially blocked by said needle member acting in combination as a filter.
Claim 3
Dependent Claim
62 words
Apparatus as in claim 1, above, further including flow control means for permitting a back flow of liquid through the pumping means intake during the pumping portion of an operating cycle, whereby fluid is forced through said filter plate and into the supply during relative motion, tending to clear the area of foreign matter in the vicinity of the filter plate means.
Claim 4
Dependent Claim
38 words
Apparatus of claim 1, above, wherein said pumping means is a reciprocating pump and said source of reciprocating motion provides a first stroke corresponding to a pump intake stroke and a second stroke corresponding to a pumping stroke.
Claim 5
Dependent Claim
36 words
Apparatus of claim 3, wherein said needle member is coupled to said source of reciprocating motion and whereby said needle member reciprocates relative to said filter plate means, for cleaning said needle member and said aperture.
Claim 6
Dependent Claim
65 words
Apparatus as in claim 4, above, wherein the direction of motion of said needle member at all times opposes the direction of liquid flow as between said pumping means intake and the source of liquid, whereby said needle member tends to move foreign matter away from said aperture during a pump intake stroke and tends to be cleaned by fluid flow during a pumping stroke.
Claim 7
Dependent Claim
27 words
Apparatus as in claim 3, above, wherein said filter plate means are coupled to said motion transmission means, whereby said aperture reciprocates relative to said needle member.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |