US3888769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Securing device for press diaphragms in plate filter presses
Assignee: Eberhard Hoesch and Soehne GmbH and Co
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Filing: 1974-01-02
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Granted: 1975-06-10
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Expires: 1994-01-02
Abstract
Abstract In a filter press, the inlet bore of the filter plates between which press diaphragms extend is provided with an annular groove which accommodates an annular enlargement of a skirt forming part of each press diaphragm. A split ring is disposed in and coaxially with the inlet bore and has an outer peripheral annular groove which accommodates a projecting portion of the enlargement extending radially outwardly from the groove provided in the filter plate.
Inventors
- 👤 Alfons Schotten
- 👤 Franz Heimbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/21; B01D25/215; B01D25/28; B01D25/282; B01D25/285; B01D25/30; B01D25/305; B01D2201/00; B01D2201/40; B01D2201/4084
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
194 words
In an arrangement composed of a filter plate and a press diaphragm, a device for the fluid tight securing of the press diaphragm to the filter plate in the zone of a slurry inlet bore provided in the filter plate, the bore having an axis, the diaphragm extending along the filter plate and has an opening in alignment with the inlet bore, comprising in combination: a. means defining an annular groove in said filter plate, said groove surrounding said inlet bore and arranged coaxially therewith; b. a skirt forming part of said diaphragm, said skirt bounding and surrounding said opening in said diaphragm and extending axially into said inlet bore of said filter plate, said skirt having an annular terminal enlargement surrounding said bore axis and conformingly received in said groove, said terminal enlargement having a projecting portion extending radially away from said groove towards said bore axis; and c. a split ring disposed in said bore coaxially with said axis, said split ring including means defining an outer peripheral annular groove, said projecting portion of said terminal enlargement being conformingly received in and supported by said peripheral annular groove in said split ring.
Claim 2
Dependent Claim
194 words
In an arrangement composed of a filter plate and a press diaphragm, a device for the fluid tight securing of the press diaphragm to the filter plate in the zone of a slurry inlet bore provided in the filter plate, the bore having an axis, the diaphragm extending along the filter plate and has an opening in alignment with the inlet bore, comprising in combination: a. means defining an annular groove in said filter plate, said groove surrounding said inlet bore and arranged coaxially therewith; b. a skirt forming part of said diaphragm, said skirt bounding and surrounding said opening in said diaphragm and extending axially into said inlet bore of said filter plate, said skirt having an annular terminal enlargement surrounding said bore axis and conformingly received in said groove, said terminal enlargement having a projecting portion extending radially away from said groove towards said bore axis; and c. a split ring disposed in said bore coaxially with said axis, said split ring including means defining an outer peripheral annular groove, said projecting portion of said terminal enlargement being conformingly received in and supported by said peripheral annular groove in said split ring.
Claim 3
Dependent Claim
60 words
A device as defined in claim 1, said split ring having an inner periphery, further comprising a support ring arranged coaxially with the bore axis and having an outer periphery in engagement with the inner periphery of said split ring, and interlocking means coupling said support ring to said split ring for preventing an axial displacement of said support ring.
Claim 4
Dependent Claim
52 words
A device as defined in claim 2, wherein said interlocking means includes means on one of said rings defining a peripheral annular locking groove oriented towards the other of said rings and a peripheral locking rib provided on said other of said rings, said locking rib is received in said locking groove.
Claim 5
Dependent Claim
76 words
A device as defined in claim 2, wherein said filter plate has a central plane, said split ring and said support ring include, at both sides of said central plane, radially inwardly converging lateral annular faces which are substantially symmetrical to one another with respect to said central plane, and said lateral annular faces on said split ring and said support ring at the same side of said central plane are in alignment with one another.
Claim 6
Dependent Claim
28 words
A device as defined in claim 4, including clamping means for securing a filter cloth against the aligned annular faces of said split ring and said support ring.
Claim 7
Dependent Claim
80 words
A device as defined in claim 5, wherein said clamping means includes two axially adjacent clamping rings disposed coaxially with said bore axis and having lateral faces for pressing the filter cloth against said aligned annular faces of said split ring and said support ring; a sleeve member disposed coaxially with said bore axis and radially inwardly of said clamping rings; and coupling means connecting said sleeve to said clamping rings for urging said clamping rings axially toward one another.
Claim 8
Dependent Claim
53 words
A device as defined in claim 6, wherein said coupling means includes interengaging threads on said sleeve member and on one of said clamping rings and a peripheral collar integral with said sleeve member, and said collar is in engagement with aN annular radial wall face of the other of said clamping rings.
Claim 9
Dependent Claim
34 words
A device as defined in claim 1, wherein said annular groove in said filter plate and in said split ring have frustoconical side walls for axially compressing the diaphragm skirt accommodated in said grooves.
Claim 10
Dependent Claim
76 words
A device as defined in claim 1, wherein there are a plurality of said diaphragms, a separate one of said diaphragms extends along either side of said filter plate, and said annular terminal enlargement of the skirt of the diaphragm disposed along the one side of said filter plate has a forked configuration to receive and surround the annular terminal enlargement of the skirt of the diaphragm disposed along the other side of said filter plate.
Claim 11
Dependent Claim
28 words
A device as defined in claim 1, including a bilaterally adhesive strip inserted in said filter plate between said enlargement and said annular groove in said filter plate.
Claim 12
Dependent Claim
32 words
A device as defined in claim 1, wherein said enlargement includes anchoring faces arranged normal to said bore axis for transmitting to said means defining said grooves stresses generated in said diaphragm.
Claim 13
Dependent Claim
47 words
A device as defined in claim 1, wherein the groove in said split ring is shallower than the groove in said filter plate, whereby the axial forces transmitted by said enlargement to said filter plate are greater than those transmitted by said enlargement to said split ring.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |