US3693575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ship{3 s drive and method of operating the same
Assignee: Individual
•
Filing: 1970-12-22
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Granted: 1972-09-26
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Expires: 1990-12-22
Abstract
Abstract A ship''s drive and a method of operating it. The drive has a prime mover which can operate at a first power output, at a higher second power output and at a highest third power output. A screw propeller is driven in rotation by the prime mover and includes several blades which are mounted on it angularly adjustable so that they can be displaced either in leeward or, optionally, in luffward direction between a first, a second, and a third position which respectively correspond to full ahead, astern and emergency full astern drive mode. A control unit is provided which couples the propeller with the prime mover in such a manner that the blades can be displaced towards the first position only in leeward direction and only when the prime mover is at its first power output. When the prime mover delivers its second power output the blades can be displaced towards the second position only in luffward direction. In case of an emergency stop, an override arrangement displaces the blades to the third position in luffward direction and irrespective of their previous position while simultaneously initiating the operation of the prime mover at its third and highest power output.
Inventors
- 👤 Rudolf Mades
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:46
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
A ship''s drive, comprising in combination, a prime mover operable for providing a first power output, a higher second power output, and a highest third power output; at least one screw propeller mounted for rotation by said prime mover about a main axis and having a plurality of blades angularly displaceable about transverse pivot axes in leeward and optionally in luffward direction between at least a first, a second and a third posiTion which respectively correspond to a full ahead, astern and emergency fully astern drive mode; and means coupling said screw propeller with said prime mover for displacement of said blades towards said first position in leeward direction when said prime mover provides said first power output, from said first position towards said second position in luffward direction when said prime mover provides said second power output, and to said third position in luffward direction with concomitant operation of said prime mover at said third power output.
Claim 2
Dependent Claim
158 words
A ship''s drive, comprising in combination, a prime mover operable for providing a first power output, a higher second power output, and a highest third power output; at least one screw propeller mounted for rotation by said prime mover about a main axis and having a plurality of blades angularly displaceable about transverse pivot axes in leeward and optionally in luffward direction between at least a first, a second and a third posiTion which respectively correspond to a full ahead, astern and emergency fully astern drive mode; and means coupling said screw propeller with said prime mover for displacement of said blades towards said first position in leeward direction when said prime mover provides said first power output, from said first position towards said second position in luffward direction when said prime mover provides said second power output, and to said third position in luffward direction with concomitant operation of said prime mover at said third power output.
Claim 3
Dependent Claim
61 words
A ship''drive as defined in claim 1, and means comprising a control panel having a slot, a pointer mounted in said slot for displacement longitudinally of the same, indicia means on said panel spaced along said slot and indicative of said first, second and third positions, and actuating means linked with said pointer and with said screw propeller and prime mover.
Claim 4
Dependent Claim
69 words
A ship''s drive as defined in claim 2, wherein said actuating means comprises an actuating member for moving said pointer between said first and second positions, and an override member for moving said pointer to said third position and for simultaneously displacing said blades to said third position from either of said first and second positions while concomitantly initiating operation of said prime mover at said third power output.
Claim 5
Dependent Claim
15 words
A ship''s drive as defined in claim 3, said override member comprising an override pushbutton.
Claim 6
Dependent Claim
48 words
A ship''s drive as defined in claim 1, said means comprising detecting means operable for effecting displacement of said blades to said third position and concomitant operation of said prime mover at said third power output in automatic response to acquisition of predetermined information by said detecting means.
Claim 7
Dependent Claim
16 words
A ship''s drive as defined in claim 5, wherein said detecting means comprises a radar unit.
Claim 8
Dependent Claim
27 words
A ship''s drive as defined in claim 5, wherein said detecting means comprises a measuring device for measuring the speed of a drop in the ambient temperature.
Claim 9
Dependent Claim
22 words
A ship''s drive as defined in claim 5, wherein said detecting means comprises a measuring device for measuring the ambient magnetic field.
Claim 10
Independent Claim
167 words
A method of operating a ship''s drive of the type having a prime mover operable for providing a first power output, a higher second power output and a highest third power output, and further having at least one screw propeller mounted for rotation by the prime mover about a main axis and provided with a plurality of blades which are angularly displaceable about transverse pivot axes in leeward and optionally in luffward direction between at least a first, a second and a third position which respectively correspond to a full ahead, astern and emergency full astern drive mode, said method comprising the steps of displacing said blades towards said first position in leeward direction only when said prime mover provides said first power output; displacing said blades towards said second position in luffward direction only when said prime mover provides said second power output; and displacing said blades to said third position with concomitant initiation of the operation of said prime mover at said third power output.
Claim 11
Independent Claim
167 words
A method of operating a ship''s drive of the type having a prime mover operable for providing a first power output, a higher second power output and a highest third power output, and further having at least one screw propeller mounted for rotation by the prime mover about a main axis and provided with a plurality of blades which are angularly displaceable about transverse pivot axes in leeward and optionally in luffward direction between at least a first, a second and a third position which respectively correspond to a full ahead, astern and emergency full astern drive mode, said method comprising the steps of displacing said blades towards said first position in leeward direction only when said prime mover provides said first power output; displacing said blades towards said second position in luffward direction only when said prime mover provides said second power output; and displacing said blades to said third position with concomitant initiation of the operation of said prime mover at said third power output.
Claim 12
Dependent Claim
55 words
A method as defined in claim 9, wherein said ship''s drive further comprises a detecting device for detecting predetermined information; and further comprising the step of displacing said blades to said third position and operating said prime mover at said third output in automatic response to acquisition of said predetermined information by said detecting device.
References Cited (Backward Citations)
US718881A
Cited
US3082827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |