US4279751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system
Assignee: Individual
•
Filing: 1979-03-16
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Granted: 1981-07-21
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Expires: 1999-03-16
Abstract
Abstract A hydraulic system including a working-liquid pressure line and drain line communicated accordingly with an inlet and outlet of a housing into which a porous piezoelectric ceramic filtering element, such as barium titanate, is placed, connected to a generator of electric oscillations and separates said inlet and outlet.
Inventors
- 👤 Semyon I. Fishgal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/01; B01D33/03; B01D33/0307; B01D33/033; B01D33/0338; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A flow-line filtration system for a liquid containing suspended solids comprising a housing having a liquid inlet port and a liquid outlet port, a porous piezoelectric ceramic filtering element having working surfaces thereon and located in the housing in the flow path of the liquid, partitioning the housing into an input part and an output part, a metallic coating on said working surfaces, and a generator of electric oscillations connected to said metallic coating whereby foreign matter in the liquid is removed by the filter and vibration of the filter effected by the generator of electric oscillation prevents clogging of the filter.
Claim 2
Dependent Claim
102 words
A flow-line filtration system for a liquid containing suspended solids comprising a housing having a liquid inlet port and a liquid outlet port, a porous piezoelectric ceramic filtering element having working surfaces thereon and located in the housing in the flow path of the liquid, partitioning the housing into an input part and an output part, a metallic coating on said working surfaces, and a generator of electric oscillations connected to said metallic coating whereby foreign matter in the liquid is removed by the filter and vibration of the filter effected by the generator of electric oscillation prevents clogging of the filter.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |