US4867716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat
Assignee: Individual
•
Filing: 1988-05-16
•
Granted: 1989-09-19
•
Expires: 2008-05-16
Abstract
Abstract The present invention includes a boat having a pair of rotatable elongated pontoons on opposite sides thereof. Each of the pontoons has helical flighting for propelling the boat during rotation of the pontoon. The pontoon also is filled with floatation materials so as to add to the buoyancy of the vehicle. Each pontoon is independently rotatable so as to achieve maneuverability even without a rudder. A modified form of the present invention utilizes two independently rotatable paddle wheels.
Inventors
- 👤 Douglas F. McFarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/38; B63H16/00; B63H16/08; B63H16/12; B63H1/02; B63H1/12; B63H2001/122; B63H2001/125; B63H16/20; B63H2016/202
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
211 words
A boat for use on a body of water comprising: an elongated boat frame having a longitudinal axis, a forward end, a rearward end and first and second opposite sides; first and second rotatable drive means rotatably mounted to said frame for rotation about first and second axis and having blade means thereon, said first and second drive means being independently rotatable on said boat frame to cause said blade means to engage said water and propel said boat frame through said water; said first and second drive means each comprising a cylindrical body having an outer cylindrical surface and having a float chamber therein imparting buoyancy to said boat frame, said blade means being attached to said outer cylindrical surface of said cylindrical body; first power means drivingly connected to said first drive means for causing rotation thereof about said first axis; second power means drivingly connected to said second drive means for causing rotation thereof about said second axis; and said first and second means each being reversible and operate independently of one another whereby said first and second power means are capable of selectively rotating said first and second drive means in opposite directions simultaneously at selected times and in the same direction simultaneously at other selected times.
Claim 2
Dependent Claim
211 words
A boat for use on a body of water comprising: an elongated boat frame having a longitudinal axis, a forward end, a rearward end and first and second opposite sides; first and second rotatable drive means rotatably mounted to said frame for rotation about first and second axis and having blade means thereon, said first and second drive means being independently rotatable on said boat frame to cause said blade means to engage said water and propel said boat frame through said water; said first and second drive means each comprising a cylindrical body having an outer cylindrical surface and having a float chamber therein imparting buoyancy to said boat frame, said blade means being attached to said outer cylindrical surface of said cylindrical body; first power means drivingly connected to said first drive means for causing rotation thereof about said first axis; second power means drivingly connected to said second drive means for causing rotation thereof about said second axis; and said first and second means each being reversible and operate independently of one another whereby said first and second power means are capable of selectively rotating said first and second drive means in opposite directions simultaneously at selected times and in the same direction simultaneously at other selected times.
Claim 3
Dependent Claim
27 words
A boat according to claim 1 wherein said blade means comprise a helical flighting attached to and extending helically around said cylindrical surface of said drive means.
Claim 4
Dependent Claim
30 words
A boat according to claim 2 wherein said first and second rotational axes of said first and second drive means extend parallel to said longitudinal axis of said boat frame.
Claim 5
Dependent Claim
52 words
A boat according to claim 3 wherein said first axis of said cylindrical body of said first drive means is located adjacent said first side of said boat frame and said second axis of said cylindrical body of said second drive means is located adjacent said second side of said boat frame.
Claim 6
Dependent Claim
35 words
A boat according to claim 4 wherein said first and second cylindrical bodies are elongated and have first and second cylindrical axes extending in a line parallel to said longitudinal axis of said boat frame.
Claim 7
Dependent Claim
42 words
A boat according to claim 1 wherein said first and second power means are selectively operable independent of one another whereby one of said first and second drive means is selectively capable of rotation while the other drive means is not rotated.
Claim 8
Dependent Claim
65 words
A boat according to claim 1 wherein coupling means extend between said first and second power means, said coupling means including locking means movable from a first position wherein said first and second power means are disconnected from one another and operate independently of one another to a second position locking said first and second power means together for operation in unison with one another.
Claim 9
Dependent Claim
29 words
A boat according to claim 1 wherein said first and second rotational axes of said first and second drive means extend perpendicular to said longitudinal axis of said frame.
Claim 10
Dependent Claim
39 words
A boat according to claim 8 wherein blade means of said first and second drive mans each comprise a plurality of blades positioned in circumferential spaced relation around the circumference of said outer cylindrical surface of said cylindrical body.
Claim 11
Dependent Claim
29 words
A boat according to claim 9 wherein said first and second drive means are positioned in side by side relation and said first and second rotational axes thereof coincide.
Claim 12
Dependent Claim
39 words
A boat according to claim 10 wherein said plurality of blades of said first drive means and said plurality of blades of said second drive means are at an angle with respect to said first and second rotational axes.
Claim 13
Dependent Claim
17 words
A boat according to claim 1 wherein said frame is free from having a rudder for steering.
Claim 14
Dependent Claim
35 words
A boat according to claim 1 comprising rudder means pivotally mounted to said frame, rudder control means connected to said rudder means for selectively moving said rudder means to steer said boat in said water.
Claim 15
Dependent Claim
39 words
A boat according to claim 1 wherein said first and second power means are independently operable at varying speeds whereby said first and second drive means are selectively capable of rotating at different speeds with respect to one another.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |