Patent US3633531A successfully refreshed from Google Patents.
US3633531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trolling device for boats
Assignee: Individual
•
Filing: 1970-01-23
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Granted: 1972-01-11
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Expires: 1990-01-23
Abstract
Abstract A special device is provided for slowing down the rate of advance of a boat in a body of water, the boat being driven by the blades of a propeller shaft of an engine substantially independently of the speed of rotation of the shaft and hence of the blades. The device preferably is removable so that it can be installed and used when it is desired to use the boat at slow speeds, such as for trolling; and so that when the device is removed, the boat may be made to move at relatively high speeds, such as going to and from a desired fishing area. In other words, the special device permits the use of a relatively high-speed motor to operate the same boat at relatively low speeds.
Inventors
- 👤 Thomas A Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:19
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/32; B63H20/34; B63H25/00; B63H25/44; B63H25/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
In a motor trolling device for a boat operable with an outboard motor, the improvement comprising a substantially imperforate baffle positionable between the Housing of the motor and the stern of the boat; and the baffle is provided with securing means to make it attachable to the motor housing transversely across the normal forward direction of travel of the propeller shaft of the motor, and elastic holding means associated with the baffle to secure the baffle to the lowermost portion of the motor housing.
Claim 2
Dependent Claim
84 words
In a motor trolling device for a boat operable with an outboard motor, the improvement comprising a substantially imperforate baffle positionable between the Housing of the motor and the stern of the boat; and the baffle is provided with securing means to make it attachable to the motor housing transversely across the normal forward direction of travel of the propeller shaft of the motor, and elastic holding means associated with the baffle to secure the baffle to the lowermost portion of the motor housing.
Claim 3
Dependent Claim
34 words
A motor trolling device according to claim 1 in which said elastic holding means is a loop of elastic material one end of which is fixed centrally to the lower portion of said baffle.
Claim 4
Dependent Claim
22 words
A motor trolling device according to claim 1 in which said securing means consists of clips removably engageable with the motor housing.
Claim 5
Dependent Claim
102 words
A motor trolling device according to claim 1, in which the baffle is shaped angularly with an upper portion having said guide means attachable to the housing and a lower portion dependable transversely across said normal forward direction of travel of the propeller shaft when the boat moves forward; the upper and lower portions of the angular baffle are generally at right angles to each other; and the upper portion of the baffle has a central slot extending from the edge thereof to receive the motor housing, a clip being mounted on each side of this slot for removably engaging said housing.
References Cited (Backward Citations)
US2078179A
Cited
US2914019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |