US4052163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic vacuum suction funnel
Assignee: Hoechst AG
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Filing: 1976-06-10
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Granted: 1977-10-04
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Expires: 1996-06-10
Abstract
Abstract A plastic vacuum suction filter or funnel is composed of a cut tube wherein a thrust ring is mounted in close contact with the inner wall, which thrust ring, together with a support, carries the sieve plate; the support resting on a slightly inclined funnel bottom.
Inventors
- 👤 Alfred Patzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:54
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/03; B01D29/012; B01D2201/00; B01D2201/20; B01D2201/204
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A vacuum suction filter comprising a generally cylindrical tube, a thrust ring mounted within said tube and tightly engaged therewith, a bottom wall mounted in one end of said tube and closing off said one end of the tube, a sieve plate support member seated on said bottom wall and extending therefrom to the level of said ring in said tube, and a perforated sieve plate seated on said thrust ring and said support member in spaced relation to said bottom wall to define a vacuum chamber in said tube, a first conduit connected in communication with said chamber through said tube adjacent said thrust ring for applying a vacuum to said chamber, and a second conduit connected in communication with said chamber through said tube and near said bottom wall to permit filtrate from said chamber, said bottom wall being inclined towards said second conduit; said tube, bottom wall, sieve plate and sieve plate support member all being formed of plastic materials.
Claim 2
Dependent Claim
163 words
A vacuum suction filter comprising a generally cylindrical tube, a thrust ring mounted within said tube and tightly engaged therewith, a bottom wall mounted in one end of said tube and closing off said one end of the tube, a sieve plate support member seated on said bottom wall and extending therefrom to the level of said ring in said tube, and a perforated sieve plate seated on said thrust ring and said support member in spaced relation to said bottom wall to define a vacuum chamber in said tube, a first conduit connected in communication with said chamber through said tube adjacent said thrust ring for applying a vacuum to said chamber, and a second conduit connected in communication with said chamber through said tube and near said bottom wall to permit filtrate from said chamber, said bottom wall being inclined towards said second conduit; said tube, bottom wall, sieve plate and sieve plate support member all being formed of plastic materials.
Claim 3
Dependent Claim
29 words
The suction filter as defined in claim 1 wherein said plastic material comprises a plastic selected from the group consisting of polyethylene, polypropylene, and copolymers of ethylene and/or propylene.
Claim 4
Dependent Claim
19 words
The suction filter as defined in claim 2 wherein said tube has an internal diameter of approximately 1600 mm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |