Patent US3669273A successfully refreshed from Google Patents.
US3669273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for releasing filter cake in filter press
Assignee: Kurita Machinery Manufacturing Co Ltd
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Filing: 1970-08-28
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Granted: 1972-06-13
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Expires: 1990-08-28
Abstract
Abstract A plurality of hangers provided with rollers are movably mounted on wavelike rails disposed above a row of filter plates and in parallel with the direction in which the filter plates are moved. Springs whose upper ends are connected to the hangers support the opposite ends of a rod from which suspends the upper portion of a filter cloth disposed along the surfaces of each two adjacent filter plates. When the filter plate is released for transport, the hangers with rollers are thereby moved and the filter cloth is subjected to vibration produced by provision of the wavelike rails and springs.
Inventors
- 👤 Ken-Ichiro Kurita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:54
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/20; B01D25/00; B01D25/12; B01D25/127; B01D25/172; B01D25/19; B01D25/32; B01D25/34; B01D25/346
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
In a filter press including a plurality of filter plates supported on side bars, a movable end plate for pressing said filter plates against a stationary end plate and a filter cloth disposed along the filtering surfaces of each two adjacent filter plates, a device for releasing filter cake from said filter cloth, comprising wave-like rails disposed above said filter plates in parallel with the direction of movement of said filter plates and having at least one convexity and one concavity corresponding to each of said filter plates, a plurality of rollers rotatably mounted on said wavelike rails, hangers supported on shafts of said rollers, springs connected to said hangers, and rods whose opposite ends are connected to said springs and over which the upper portions of said filter cloth are hung, whereby sequential retraction of said end plate and said filter plates sequentially moves said rods downwardly, pulls said springs obliquely, and causes said rollers to slide abruptly toward said end plate and fall into said concavities so that said cloth is vibrated.
Claim 2
Dependent Claim
174 words
In a filter press including a plurality of filter plates supported on side bars, a movable end plate for pressing said filter plates against a stationary end plate and a filter cloth disposed along the filtering surfaces of each two adjacent filter plates, a device for releasing filter cake from said filter cloth, comprising wave-like rails disposed above said filter plates in parallel with the direction of movement of said filter plates and having at least one convexity and one concavity corresponding to each of said filter plates, a plurality of rollers rotatably mounted on said wavelike rails, hangers supported on shafts of said rollers, springs connected to said hangers, and rods whose opposite ends are connected to said springs and over which the upper portions of said filter cloth are hung, whereby sequential retraction of said end plate and said filter plates sequentially moves said rods downwardly, pulls said springs obliquely, and causes said rollers to slide abruptly toward said end plate and fall into said concavities so that said cloth is vibrated.
Claim 3
Dependent Claim
23 words
The filter press as claimed in claim 1 wherein a means for pushing said hangers backward is mounted on said movable end plate.
Claim 4
Dependent Claim
21 words
The filter press as claimed in claim 1 wherein said wavelike rails are inclined gradually downward toward said movable end plate.
Claim 5
Dependent Claim
19 words
The filter press as claimed in claim 1 wherein said wave-like rails are in the form of a sawtooth.
Claim 6
Dependent Claim
25 words
The filter press as claimed in claim 1 wherein said rail is provided with a stopper at the end thereof above said stationary end plate.
Claim 7
Dependent Claim
47 words
The filter press as claimed in claim 1 wherein a second rod is mounted on the ends of arm members pivotally attached to support bars on the opposite sides of each of said filter plates, one part of said filter cloth being passed on said second rod.
Claim 8
Dependent Claim
50 words
The filter press as claimed in claim 6 wherein a third rod is mounted on the ends of said arm members pivotally attached to said support bars on the opposite sides of each of said filter plates, the other part of said filter cloth being passed on said third rod.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |