US4352025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for generation of electrical power
Assignee: Individual
•
Filing: 1980-11-17
•
Granted: 1982-09-28
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Expires: 2000-11-17
Abstract
Abstract A hydroelectric generator is located in the basement of a high-rise building and connected in series in the clean waste-water line of the building, to produce electrical power in response to the flow of the waste water from the building. An automatically controlled valve in a bypass line serves to direct excess water flow around the hydroelectric generator unit and maintain the flow through the generator unit at a predetermined maximum level. An automatic switch-over device disconnects the generator output terminals from the electrical output terminals of the unit when the voltage and/or frequency of the generator output is unsatisfactory, e.g., too low.
Inventors
- 👤 Harry D. Troyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:55
CPC Classifications
F; F03; F03B; F03B13/00; F05; F05B; F05B2220/00; F05B2220/20; F05B2220/60; F05B2220/602; Y; Y02; Y02B; Y02B10/00; Y02B10/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
Apparatus for generating electricity, comprising: a high-rise building waste water conduit system for delivering waste water from the interior of a high-rise building to an external waste water disposal sewer line; a hydroelectric generator of electrical power installed in said waste water conduit system for generating electrical power in response to the flow of water from said conduit system to said sewer line wherein said apparatus comprises a bypass conduit containing a normally-closed type of valve, in parallel with said hydroelectric generator, and means responsive to the rate of flow of said water through said generator for opening said valve progressively further as said flow rate rises above a selected value.
Claim 2
Dependent Claim
111 words
Apparatus for generating electricity, comprising: a high-rise building waste water conduit system for delivering waste water from the interior of a high-rise building to an external waste water disposal sewer line; a hydroelectric generator of electrical power installed in said waste water conduit system for generating electrical power in response to the flow of water from said conduit system to said sewer line wherein said apparatus comprises a bypass conduit containing a normally-closed type of valve, in parallel with said hydroelectric generator, and means responsive to the rate of flow of said water through said generator for opening said valve progressively further as said flow rate rises above a selected value.
References Cited (Backward Citations)
US716650A
Cited
US1018925A
Cited
US1946182A
Cited
US3750001A
Cited
US3720840A
Cited
US4246753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |