US3828713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat flanking rudder system
Assignee: Individual
•
Filing: 1972-10-19
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Granted: 1974-08-13
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Expires: 1992-10-19
Abstract
Abstract A flanking rudder system for small, propeller driven boats including at least two transversely spaced rudder blades mounted in flanking positions on opposite sides of a boat propeller, with blade portions extending to pivot about the propeller, and single control means for varying the effective rudder angles and positions with respect to the longitudinal axis of the boat and the propeller. The rudders are connected by a transverse bridge member and the assembly may be detachable to provide simplicity of mounting and permit blade interchangeability. The improved rudder system may also include a hydro-foil or a planing bar.
Inventors
- 👤 C Duryea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:49
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/06; B63H25/38; B63H2025/387
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A flanking rudder system for propeller driven boats comprising: a. transversely spaced flanking rudder blades mounted in flanking positions on opposite sides of the propeller; b. said blades being cojointly angularly movable with respect to the boat and propeller; c. said blades being so dimensioned and positioned as to have portions thereof extending fore and aft of the propeller at all angular positions thereof and upon selected angular adjustments of the blades with respect to the longitudinal center line of the boat, one said blade will at least in part be positioned behind the propeller; d. a cross plate interconnecting said spaced flanking rudder blades, a rudder post pivotally mounting said cross plate and blades attached thereto below said boat, angular rotation of said rudder post pivoting said cross plate and angularly swinging said blades to positions at least partially ahead and behind said propeller; and e. blade stabilizing means cooperating with said blades and the bottom of the boat, said stabilizing means including a pair of spaced tracks secured to the boat bottom in curved paths and engageable by the spaced flanking rudder blades at all angular positions thereof.
Claim 2
Dependent Claim
190 words
A flanking rudder system for propeller driven boats comprising: a. transversely spaced flanking rudder blades mounted in flanking positions on opposite sides of the propeller; b. said blades being cojointly angularly movable with respect to the boat and propeller; c. said blades being so dimensioned and positioned as to have portions thereof extending fore and aft of the propeller at all angular positions thereof and upon selected angular adjustments of the blades with respect to the longitudinal center line of the boat, one said blade will at least in part be positioned behind the propeller; d. a cross plate interconnecting said spaced flanking rudder blades, a rudder post pivotally mounting said cross plate and blades attached thereto below said boat, angular rotation of said rudder post pivoting said cross plate and angularly swinging said blades to positions at least partially ahead and behind said propeller; and e. blade stabilizing means cooperating with said blades and the bottom of the boat, said stabilizing means including a pair of spaced tracks secured to the boat bottom in curved paths and engageable by the spaced flanking rudder blades at all angular positions thereof.
Claim 3
Dependent Claim
54 words
A system as claimed in claim 1 including a water tight elongated bearing assembly mounting said rudder post through the bottom of said boat, a lever arm connected to the free end of said rudder post and means selectively operable for selective angular rotation of said rudder post through movement of said lever arm.
Claim 4
Dependent Claim
29 words
The flanking rudder system defined in claim 1 including an adjustable planing bar extending between the pair of rudders and means for adjusting the angle of said planing bar.
Claim 5
Dependent Claim
15 words
The invention defined in claim 3 wherein the adjusting means includes a pressure fluid ram.
Claim 6
Dependent Claim
27 words
The flanking rudder system defined in claim 1 including an adjustable hydro-foil extending between the pair of rudders and means for adjusting the angle of said hydro-foil.
Claim 7
Dependent Claim
22 words
A system as claimed in claim 1 including a central rudder blade positioned intermediate said flanking blades and cojointly angularly adjustable therewith.
Claim 8
Dependent Claim
39 words
A system as defined in claim 1 including means urging said flanking rudder blades to a centered position, said means comprising spring means having one end connected to rudder actuating means and the other end secured to the boat.
Claim 9
Dependent Claim
70 words
The invention defined in claim 7 wherein said spring means includes a lever arm connected to the rudder post and a helical spring connected at one end to one end of said lever arm and connected at the other end to means carried by the boat whereby when said lever arm is moved to pivot said flanking rudder blades from a centered position the helical spring is placed under tension.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |