Patent US4570077A successfully refreshed from Google Patents.
US4570077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery system driven alternators and auxiliary drive systems therefor
Assignee: MARINE DESIGN CONSULTANTS Ltd
•
Filing: 1983-07-05
•
Granted: 1986-02-11
•
Expires: 2003-07-05
Abstract
Abstract An auxiliary drive system for a waste heat recovery system driven alterna having a rotor, comprises a hydraulic drive means for driving the alternator rotor and means for engaging and disengaging the hydraulic drive means and the alternator rotor. The hydraulic drive means and the alternator rotor are engaged for the hydraulic drive means to drive the alternator rotor and disengaged when the alternator rotor speed is marginally above a predetermined speed.
Inventors
- 👤 Ian G. Lambley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
B; B63; B63J; B63J3/00; B63J3/02; F; F01; F01K; F01K23/00; F01K23/12; F01K23/14; F02; F02G; F02G5/00; F02G5/02; Y; Y02; Y02E; Y02E20/00; Y02E20/14; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T70/00; Y02T70/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
A system for driving an alternator having a rotor by waste heat comprising: an engine from which waste heat is derived; main drive means for receiving the waste heat from the engine, and driving the rotor at a predetermined speed; auxiliary driving means for providing supplemental power from the engine to the rotor to maintain the rotor at said predetermined speed, said auxiliary driving means including, hydraulic drive means for driving the rotor, connecting means for engaging and disengaging the hydraulic drive means and the rotor; and control means responsive to the speed of the rotor for causing said main driving means to drive the rotor at a predetermined speed, for causing said connecting means to engage the hydraulic drive means to supplement said main driving means in driving the rotor whenever the rotor speed drops below the predetermined speed, and for causing said connecting means to disengage the hydraulic drive means whenever the rotor subsequently reaches said predetermined speed.
Claim 2
Independent Claim
160 words
A system for driving an alternator having a rotor by waste heat comprising: an engine from which waste heat is derived; main drive means for receiving the waste heat from the engine, and driving the rotor at a predetermined speed; auxiliary driving means for providing supplemental power from the engine to the rotor to maintain the rotor at said predetermined speed, said auxiliary driving means including, hydraulic drive means for driving the rotor, connecting means for engaging and disengaging the hydraulic drive means and the rotor; and control means responsive to the speed of the rotor for causing said main driving means to drive the rotor at a predetermined speed, for causing said connecting means to engage the hydraulic drive means to supplement said main driving means in driving the rotor whenever the rotor speed drops below the predetermined speed, and for causing said connecting means to disengage the hydraulic drive means whenever the rotor subsequently reaches said predetermined speed.
Claim 3
Dependent Claim
21 words
A system as claimed in claim 1, wherein the means for engaging and disengaging the hydraulic drive means is a clutch.
Claim 4
Dependent Claim
27 words
A system as claimed in claim 1, wherein the hydraulic drive means comprises at least one hydraulic motor supplied with oil from one or more hydraulic pumps.
Claim 5
Dependent Claim
19 words
A system as claimed in claim 3, wherein the or each hydraulic motor is of the axial piston type.
Claim 6
Dependent Claim
19 words
A system as claimed in claim 3, wherein the or each pump is pressure controlled to avoid excess pressures.
Claim 7
Dependent Claim
21 words
A system as claimed in claim 3, wherein the or each hydraulic pump is of the axial piston variable delivery type.
Claim 8
Dependent Claim
22 words
A system as claimed in claim 1, wherein coupling means are provided between the engagement and disengagement means and the alternator rotor.
Claim 9
Dependent Claim
15 words
A system as claimed in claim 7, wherein the coupling means is a gear coupling.
Claim 10
Dependent Claim
21 words
A system as claimed in claim 8, wherein the gear coupling is capable of allowing for any misalignment in the coupling.
Claim 11
Dependent Claim
19 words
A system as claimed in claim 1, in which the main drive to the alternator is a steam turbine.
Claim 12
Dependent Claim
47 words
A system as claimed in claim 1, wherein said main drive means includes valve means controlled by said control means, said control means causing said connecting means to engage or disengage said hydraulic drive means when said valve means are respectively fully open or beginning to close.
References Cited (Backward Citations)
US1713649A
Cited
GB920408A
Cited
GB937038A
Cited
GB928140A
Cited
US3165897A
Cited
GB1046030A
Cited
US3345517A
Cited
US3477013A
Cited
US3675112A
Cited
US4049972A
Cited
US4077748A
Cited
US4010378A
Cited
US4038558A
Cited
GB1496374A
Cited
US4309914A
Cited
US4186312A
Cited
GB2055259A
Cited
US4394582A
Cited
GB2081425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |