Patent US3774769A successfully refreshed from Google Patents.
US3774769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter pressurized apparatus
Assignee: MARINE MIDLAND BANK NA
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Filing: 1971-11-22
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Granted: 1973-11-27
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Expires: 1991-11-22
Abstract
Abstract An improved pressurized liquid filtering apparatus particularly suitable for relatively small-sized pressure vessels in which a flange member sits in the top portion of the vessel and co-acts with the cover to provide a series of conduits for directing fluid under pressure into and out of the vessel. The flange member includes a number of grooves designed to accept sealing members as well as an internal structural surface for insuring proper alignment of the cover filtering bag and vessel body. An optional restraining means which may be integral or removable from the vessel body enables the invention to operate at pressures above those possible when using the filter bag alone.
Inventors
- 👤 E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:05
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
229 words
An improved pressurized liquid filtering apparatus including: a vessel having a body portion with a fluid filtering chamber provided therein; a drainage means at the bottom of said vessel; cover means adapted to provide closure for said body portion, said cover means having a number of integrally formed concentric wall surfaces disposed therein to co-act with the top of said vessel and provide means for conducting liquid under pressure to the top of said filtering chamber when the latter is closed; inlet and outlet means fixedly attached to said cover for directing said fluid under pressure into and out of said vessel; a filter bag having a ring member disposed about its upper periphery enabling said filter bag to nestle centrally in a filter bag restraining means open at the bottom and surrounding said filter bag for a substantial portion of its periphery; a flange member disposed on the top portion of said vessel to form conduit means for directing fluid into and out of said respective inlet and outlet means and being integrally formed with and extending into said body member for co-acting with the inner surface of said cover; sealing means disposed on the contact surfaces of said flange member to seal the passages formed between the surfaces of said cover and said flange conduits; and clamping means for manually fastening said cover to said body portion.
Claim 2
Dependent Claim
229 words
An improved pressurized liquid filtering apparatus including: a vessel having a body portion with a fluid filtering chamber provided therein; a drainage means at the bottom of said vessel; cover means adapted to provide closure for said body portion, said cover means having a number of integrally formed concentric wall surfaces disposed therein to co-act with the top of said vessel and provide means for conducting liquid under pressure to the top of said filtering chamber when the latter is closed; inlet and outlet means fixedly attached to said cover for directing said fluid under pressure into and out of said vessel; a filter bag having a ring member disposed about its upper periphery enabling said filter bag to nestle centrally in a filter bag restraining means open at the bottom and surrounding said filter bag for a substantial portion of its periphery; a flange member disposed on the top portion of said vessel to form conduit means for directing fluid into and out of said respective inlet and outlet means and being integrally formed with and extending into said body member for co-acting with the inner surface of said cover; sealing means disposed on the contact surfaces of said flange member to seal the passages formed between the surfaces of said cover and said flange conduits; and clamping means for manually fastening said cover to said body portion.
Claim 3
Dependent Claim
29 words
An improved pressurized liquid filtering apparatus as claimed in claim 1 wherein said filter bag restraining means is adapted to be integrally attached or removed from said body member.
Claim 4
Dependent Claim
63 words
An improved pressurized liquid filtering apparatus as claimed in claim 1 wherein said flange member is urged to seat on the top portion of said vessel by means of a structural member having an area concentric therewith and being disposed on the underside of said flange member to form a clearance fit sufficient to properly align said flange member with said vessel body.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |