US3637082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate shifter and scraper assembly for filter presses
Assignee: T Shriver and Co Inc
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Filing: 1969-06-20
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Granted: 1972-01-25
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Expires: 1989-06-20
Abstract
Abstract A system for mechanically shifting and cleaning the filter plates in a pressure-type filter press wherein the filter plates, which are supported on the side rails of the filter press and have supporting brackets extending over each of the rails, are shifted apart to allow a plate scraping mechanism to move downwardly against the plates and scrape the accumulated filter cake from the filter plates. The plate shifter and scraper are mounted on a carriage which slides along the rails of the filter press and the plate shifter includes pneumatically operated plate shifting devices to separate the filter plates. Once the plates are separated, a scraper mounted on the carriage in pendulum fashion above the plates is extended between the separated plates to scrape the accumulated filter cake from the exposed faces of the filter plates.
Inventors
- 👤 Leonard T Bentzien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:46
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/164; B01D25/172; B01D25/32; B01D25/38; Y; Y10; Y10T; Y10T24/00; Y10T24/36; Y10T24/3628
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A pressure-type filter press in combination with a filter plate shifter and scraper assembly comprising a filter press having opposed parallel side rails, a plurality of filter plate members slidably disposed on said side rails, a plate shifter and scraper assembly slidably disposed relative to said filter press including a carriage slidably mounted on said side rails, means carried by said carriage to engage successive ones of a plurality of filter plate members slidably disposed on said filter press side rails including means to engage and to hold one of said successive filter plates stationery while moving the other of said filter plates relative thereto to thereby separate said plates and scraper means on said assembly selectively operable to extend between said separated plates and scrape the exposed faces of said plates.
Claim 2
Dependent Claim
132 words
A pressure-type filter press in combination with a filter plate shifter and scraper assembly comprising a filter press having opposed parallel side rails, a plurality of filter plate members slidably disposed on said side rails, a plate shifter and scraper assembly slidably disposed relative to said filter press including a carriage slidably mounted on said side rails, means carried by said carriage to engage successive ones of a plurality of filter plate members slidably disposed on said filter press side rails including means to engage and to hold one of said successive filter plates stationery while moving the other of said filter plates relative thereto to thereby separate said plates and scraper means on said assembly selectively operable to extend between said separated plates and scrape the exposed faces of said plates.
Claim 3
Dependent Claim
101 words
Apparatus as described in claim 1 wherein said means to engage and to hold one of said successive filter plates comprises opposed air cylinders mounted on said carriage, a first plate fixed to one end of said cylinder adapted to engage a portion of a first filter plate, a second plate fixed to an extension of the piston element of said air cylinder and adapted to engage a portion of a second filter plate, whereby when said air cylinder is actuated, said second plate moves away from said first plate, thereby moving said second filter plate away from said first plate.
Claim 4
Dependent Claim
38 words
Apparatus as described in claim 2 wherein said engaging and holding means are pivotally mounted on said carriage and include means to selectively pivot said first and second plates into and out of contact with said filter plates.
Claim 5
Dependent Claim
91 words
Apparatus as described in claim 3 wherein said means to selectively pivot said engaging and holding means comprises an air cylinder mounted on said carriage and having a plunger connected at one end to the air cylinder piston and at its other end to said engaging and holding means whereby when said air cylinder is actuated to extend said plunger, said first and second plates are moved from a first position out of contact with said filter plate to a second position in contact with selected ones of said filter plates.
Claim 6
Dependent Claim
46 words
Apparatus as defined in claim 1 wherein said scraper means includes at least one air cylinder pivotally mounted to said assembly and a scraper blade connected to an extension of said air cylinder plunger whereby when said air cylinder is actuated said scraper blade is extended.
Claim 7
Dependent Claim
98 words
A plate shifter and scraper assembly for a pressure-type filter press comprising a carriage adapted to move longitudinally of the filter press frame, means carried by said carriage to engage successive ones of a plurality of filter plate members slidably disposed on said filter press frame including means to engage and hold one of said successive filter plates stationary while moving the other of said successive filter plates relative thereto, and means associated with said carriage adapted to operatively engage the exposed faces of said successive ones of said filter plates to scrape off filter cake accumulated thereon.
Claim 8
Dependent Claim
98 words
A plate shifter and scraper assembly for a pressure-type filter press comprising a carriage adapted to move longitudinally of the filter press frame, means carried by said carriage to engage successive ones of a plurality of filter plate members slidably disposed on said filter press frame including means to engage and hold one of said successive filter plates stationary while moving the other of said successive filter plates relative thereto, and means associated with said carriage adapted to operatively engage the exposed faces of said successive ones of said filter plates to scrape off filter cake accumulated thereon.
Claim 9
Dependent Claim
100 words
Apparatus as defined in claim 6 wherein said means to engage and hold said filter plates comprises an air cylinder pivotally mounted to said carriage, a filter plate restraining bracket fixed to the piston end of said cylinder, a filter plate shifting bracket fixed to an extension of the air cylinder plunger whereby when said brackets are in contact with successive ones of said filter plates and said air cylinder is actuated thereby to move said brackets apart, said filter plate in contact with said shifting bracket is moved relative to the filter plate in contact with said restraining bracket.
Claim 10
Dependent Claim
27 words
Apparatus as defined in claim 7 including means to move said filter plate shifting and restraining brackets into contact with said successive ones of said filter plate.
Claim 11
Dependent Claim
66 words
Apparatus as defined in claim 8 wherein said means to move said brackets comprises a second air cylinder disposed laterally to said first mentioned air cylinder having an extension of its piston fixed to said first air cylinder whereby when said second air cylinder piston is extended, said first cylinder is pivoted about its mounting thereby to place said brackets into contact with said filter plates.
Claim 12
Dependent Claim
67 words
Apparatus as described in claim 6 wherein said means to scrape said filter plates comprises a selectively extensible scraper blade pivotally mounted on said carriage so as to move into contact with the opposed faces of said successive ones of said filter plates whereby when said blade is extended it moves along the face of one of said successive filter plates to scrape accumulated filter cake off.
Claim 13
Dependent Claim
52 words
Apparatus as described in claim 10 wherein said scraper blade is connected to an extension of an air cylinder plunger and said air cylinder is pivotally mounted on said carriage whereby said scraper blade may be selectively pivotally moved into contact with opposed faces of said successive ones of said filter plates.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |