US3887344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning filter
Assignee: Individual
•
Filing: 1973-11-19
•
Granted: 1975-06-03
•
Expires: 1993-11-19
Abstract
Abstract A stationary drum type filter is disclosed and claimed herein having a self-cleaning capability. A cylindrical housing having one closed end and one open end is provided with filter media at least partly around the circumference thereof and preferably completely around the circumference thereof. The filter media preferably has at least one area thereacross that extends outwardly, away from suction nozzles so as to permit large dirt particles, accumulations, and the like to be received therein and removed by suction nozzles passing thereover. A suction manifold is rotatably received in the closed end of the filter and sealed thereat while likewise being rotatably supported at the open end of the filter by a plurality of roller supports. At the open end of the filter the manifold is connected to a suction source where it is sealed by rotary self-sealing means. At least one, but preferably a plurality of suction nozzles are spaced along the length of the manifold equidistant therearound so as to provide balance thereto. The suction nozzles reside immediately adjacent the filter media so as to automatically clean same during rotation of the manifold. The leading edge of the nozzle is spaced upwardly from the filter media by a distance greater than the trailing edge whereby the trailing edge forces or scoops material upwardly away from the media into the suction force. Method and apparatus claims are included.
Inventors
- 👤 Randall E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/66; B01D46/68; B01D46/682; B01D2271/00; B01D2271/02; B01D2271/027; B01D2273/00; B01D2273/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
217 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having filter media secured therewithin immediately adjacent said housing and at least partially around the circumference thereof, said housing having at least one channel in a wall thereof, said channel extending longitudinally thereof; b. a manifold supported for rotation centrally along said housing; c. at least one nozzle positioned along said manifold and in communication therewith, said nozzle residing immediately adjacent said filter media inside said housing; d. means to rotate said manifold and said nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle, said at least one channel in said wall of said housing being of sufficient size to receive accumulations of waste that will not pass between said nozzle and said filter media, whereby said accumulations of waste are forced ahead of said nozzle, fall into said channel, and pass into said nozzle from within said channel; and e. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said nozzle removes said materials from said filter media and said channel as said nozzle moves therearound.
Claim 2
Dependent Claim
217 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having filter media secured therewithin immediately adjacent said housing and at least partially around the circumference thereof, said housing having at least one channel in a wall thereof, said channel extending longitudinally thereof; b. a manifold supported for rotation centrally along said housing; c. at least one nozzle positioned along said manifold and in communication therewith, said nozzle residing immediately adjacent said filter media inside said housing; d. means to rotate said manifold and said nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle, said at least one channel in said wall of said housing being of sufficient size to receive accumulations of waste that will not pass between said nozzle and said filter media, whereby said accumulations of waste are forced ahead of said nozzle, fall into said channel, and pass into said nozzle from within said channel; and e. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said nozzle removes said materials from said filter media and said channel as said nozzle moves therearound.
Claim 3
Dependent Claim
217 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having filter media secured therewithin immediately adjacent said housing and at least partially around the circumference thereof, said housing having at least one channel in a wall thereof, said channel extending longitudinally thereof; b. a manifold supported for rotation centrally along said housing; c. at least one nozzle positioned along said manifold and in communication therewith, said nozzle residing immediately adjacent said filter media inside said housing; d. means to rotate said manifold and said nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle, said at least one channel in said wall of said housing being of sufficient size to receive accumulations of waste that will not pass between said nozzle and said filter media, whereby said accumulations of waste are forced ahead of said nozzle, fall into said channel, and pass into said nozzle from within said channel; and e. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said nozzle removes said materials from said filter media and said channel as said nozzle moves therearound.
Claim 4
Dependent Claim
217 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having filter media secured therewithin immediately adjacent said housing and at least partially around the circumference thereof, said housing having at least one channel in a wall thereof, said channel extending longitudinally thereof; b. a manifold supported for rotation centrally along said housing; c. at least one nozzle positioned along said manifold and in communication therewith, said nozzle residing immediately adjacent said filter media inside said housing; d. means to rotate said manifold and said nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle, said at least one channel in said wall of said housing being of sufficient size to receive accumulations of waste that will not pass between said nozzle and said filter media, whereby said accumulations of waste are forced ahead of said nozzle, fall into said channel, and pass into said nozzle from within said channel; and e. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said nozzle removes said materials from said filter media and said channel as said nozzle moves therearound.
Claim 5
Dependent Claim
36 words
A self-cleaning filter as defined in claim 1 wherein a suction conduit connects said manifold to said suction supply means, said manifold and said conduit cooperating to produce a rotary air seal at the junction thereof.
Claim 6
Dependent Claim
67 words
A self-cleaning filter as defined in claim 2 wherein a collar is received around an end of said conduit and one end of said manifold is loosely received within said collar, said manifold having a flange therearound adjacent said end, said flange being adjacent said collar whereby suction created in said conduit causes said collar and said flange to cooperate and create said rotary air seal thereat.
Claim 7
Dependent Claim
25 words
A self-cleaning filter as defined in claim 3 wherein said collar at the end of said manifold is floating for automatic alignment of said manifold.
Claim 8
Dependent Claim
27 words
A self-cleaning filter as defined in claim 1 wherein said manifold is supported at said open end of said housing by a plurality of rollers spaced therearound.
Claim 9
Dependent Claim
53 words
A self-cleaning filter as defined in claim 1 wherein said at least one nozzle has a leading edge and a trailing edge adjacent said filter media, said trailing edge being closer to said media to force contaminants away from said media and subject same to suction in said nozzles for removal of same.
Claim 10
Dependent Claim
79 words
A self-cleaning filter as defined in claim 1 wherein a plurality of nozzles are provided around said manifold, said nozzles being equally spaced therearound and wherein said manifold is rotatably supported by a plurality of rollers at said open end of said housing, said manifold further having a flange received therearound, said manifold being rotatably rEceived in a suction line collar, whereby said flange and said collar are drawn together by suction to produce a rotary air seal thereat.
Claim 11
Dependent Claim
19 words
A self-cleaning filter as defined in claim 7 wherein said collar has a bearing surface on the inside thereof.
Claim 12
Dependent Claim
23 words
A self-cleaning filter as defined in claim 8 wherein said bearing surface is a wear resistant plastic cast into place within said collar.
Claim 13
Dependent Claim
239 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having at least one channel therein extending longitudinally with respect thereto, and having a filter media around the inside of said housing, immediately adjacent thereto, said filter media being secured within said housing at said channel; b. a suction manifold supported for rotation at said ends of said housing, said manifold having at least one nozzle secured thereto and in communication therewith, said nozzle having a leading edge and a trailing edge, said leading edge being located away from said filter media to permit passage of materials to be removed thereunder and said trailing edge being immediately adjacent said filter media whereby materials may be lifted from said media into said nozzle; c. means to rotate said manifold and said at least one nozzle around the interior of said housing whereby substantially all of the filter media is subjected to said at least one nozzle, said channel in said housing being of sufficient size that large accumulations of material that will not pass under the nozzle will fall therein and then be removed by said nozzle; and d. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said at least one nozzle removes materials from said filter media and channel as said nozzle moves therearound.
Claim 14
Dependent Claim
239 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one end for receiving air to be filtered and having at least one channel therein extending longitudinally with respect thereto, and having a filter media around the inside of said housing, immediately adjacent thereto, said filter media being secured within said housing at said channel; b. a suction manifold supported for rotation at said ends of said housing, said manifold having at least one nozzle secured thereto and in communication therewith, said nozzle having a leading edge and a trailing edge, said leading edge being located away from said filter media to permit passage of materials to be removed thereunder and said trailing edge being immediately adjacent said filter media whereby materials may be lifted from said media into said nozzle; c. means to rotate said manifold and said at least one nozzle around the interior of said housing whereby substantially all of the filter media is subjected to said at least one nozzle, said channel in said housing being of sufficient size that large accumulations of material that will not pass under the nozzle will fall therein and then be removed by said nozzle; and d. suction supply means in communication with said manifold and said at least one nozzle, whereby suction in said at least one nozzle removes materials from said filter media and channel as said nozzle moves therearound.
Claim 15
Dependent Claim
25 words
A self-cleaning air filter as defined in claim 10 wherein a plurality of nozzles are secuted to said manifold, said nozzles being equidistantly spaced therearound.
Claim 16
Dependent Claim
193 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one open end and having a filter media secured therewithin immediately adjacent said housing and extending at least partially around the inner circumference thereof; b. a suction manifold supported for rotation at said closed end of said housing and said open end of said housing, said manifold having at least one suction nozzle secured thereto and in communication therwith, said nozzle residing immediately adjacent said filter media, said manifold having a flange therearound adjacent an outer end thereof; c. means to rotate said suction manifold and said at least one nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle; and d. suction supply means connected to said manifold, said suction supply means including a suction conduit and a collar received at an end of said conduit, said collar residing around said outer end of said suction manifold, adjacent said flange, whereby suction in said conduit causes suction between said collar and said flange to create a rotary air seal therebetween.
Claim 17
Dependent Claim
193 words
A self-cleaning air filter comprising: a. a stationary cylindrical housing, said housing having one closed end and one open end and having a filter media secured therewithin immediately adjacent said housing and extending at least partially around the inner circumference thereof; b. a suction manifold supported for rotation at said closed end of said housing and said open end of said housing, said manifold having at least one suction nozzle secured thereto and in communication therwith, said nozzle residing immediately adjacent said filter media, said manifold having a flange therearound adjacent an outer end thereof; c. means to rotate said suction manifold and said at least one nozzle around the interior of said housing whereby substantially all of the filter media around said housing is subjected to said at least one nozzle; and d. suction supply means connected to said manifold, said suction supply means including a suction conduit and a collar received at an end of said conduit, said collar residing around said outer end of said suction manifold, adjacent said flange, whereby suction in said conduit causes suction between said collar and said flange to create a rotary air seal therebetween.
Claim 18
Dependent Claim
38 words
A self-cleaning air filter as defined in claim 12 wherein a plurality of nozzles are provided along said suction manifold, said nozzles being equidistantly spaced around the periphery of said manifold whereby no counter balance is needed thereat.
Claim 19
Dependent Claim
38 words
A self-cleaning air filter as defined in claim 13 wherein said frame has slots therein that receive pins attached to said collar, said pins being moveable along said slots to permit said limited lateral movement of said collar.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |