US3755835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheeled boat
Assignee: Individual
•
Filing: 1971-08-13
•
Granted: 1973-09-04
•
Expires: 1991-08-13
Abstract
Abstract A runabout boat has a tricycle undercarriage retractable for travel of the boat in water, and extendable for transporting the boat on land, either self-propelled or as a trailer. The undercarriage includes a single forward wheel mounted on a strut swingable about a transverse axis to move the wheel between raised retracted position within the hull, and lowered position projected below the hull. In projected position, the wheel is steerable by the boat''s steering wheel. Two rear wheels are supported by struts for swinging between retracted positions in wheel wells above the hull bottom and two projected positions extending partially below the hull, in one of which positions the wheels are free-wheeling, and in the other of which projected positions the wheels are power-driven by friction gears. Skid fins are mounted for projection when the rear wheels are retracted, and for retraction when the rear wheels are projected.
Inventors
- 👤 H Boersig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:41
CPC Classifications
B; B63; B63C; B63C13/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
A wheeled boat comprising a boat hull, front retractable wheel means for supporting the forward portion of the boat hull, rear wheel means, means mounting said rear wheel means for movement between an upper retracted postion, a lower forward ground-engaging load-supporting position, located a short distance aft of the center of gravity of the boat hull for supporting said boat hull to be towed when said front wheel means is in retracted position, and a lower rear ground-engaging loadsupporting position, located farther aft of the center of gravity of the boat hull than the forward ground-engaging load-supporting position of said rear wheel means when said front wheel means is in ground-engaging position for supporting said boat hull in conjunction with said front wheel means to be self-propelled, and drive means for driving said rear wheel means to propel said boat hull along the ground when said rear wheel means is in its rear ground-engaging position,
Claim 2
Dependent Claim
155 words
A wheeled boat comprising a boat hull, front retractable wheel means for supporting the forward portion of the boat hull, rear wheel means, means mounting said rear wheel means for movement between an upper retracted postion, a lower forward ground-engaging load-supporting position, located a short distance aft of the center of gravity of the boat hull for supporting said boat hull to be towed when said front wheel means is in retracted position, and a lower rear ground-engaging loadsupporting position, located farther aft of the center of gravity of the boat hull than the forward ground-engaging load-supporting position of said rear wheel means when said front wheel means is in ground-engaging position for supporting said boat hull in conjunction with said front wheel means to be self-propelled, and drive means for driving said rear wheel means to propel said boat hull along the ground when said rear wheel means is in its rear ground-engaging position,
Claim 3
Dependent Claim
41 words
The wheeled boat defined in claim 1, in which the drive means includes a powered friction gear drive engageable with the rear wheel means by movement of the rear wheel means relative to the boat hull into the rear ground-engaging position.
Claim 4
Dependent Claim
32 words
The wheeled boat defined in claim 2, the rear wheel means being free-wheeling in its lower forward ground-engaging position, and being engaged with the friction gear drive in the rear ground-engaging position.
Claim 5
Dependent Claim
17 words
The wheeled boat defined in claim 2, and hydraulic drive means for driving the friction gear drive.
Claim 6
Dependent Claim
167 words
The wheeled boat defined in claim 1, a rotatable axle mounted in the boat hull, a swingable strut projecting substantially radially from said axle and carrying the rear wheel means, means guiding said axle for rotation for swinging of said strut between a forwardly and upwardly swung position in which the rear wheel means are retracted, a position inclined downwardly and forwardly from said axle in which the rear wheel means are in their forward ground-engaging load-supporting position, and a position inclined downwardly and rearwardly from said axle in which the rear wheel means are in their lower rear ground-engaging load-supporting position, and means for holding said axle and said strut means to maintain the rear wheel means in its lower forward ground-engaging load-supporting position for supporting the weight of the boat hull to be towed and for holding said axle and said strut means to maintain the rear wheel means in its lower rear ground-engaging load-supporting position for supporting weight of the boat hull for self-propulsion.
Claim 7
Dependent Claim
61 words
The wheeled boat defined in claim 5, and a skid fin carried by the axle, projecting generally radially therefrom and spaced from the swingable strut circumferentially of the axle, rotation of the axle simultaneously swinging the swingable strut to retract the rear wheel means from ground-engaging position and swinging said skid fin to project below the bottom of the boat hull.
References Cited (Backward Citations)
US1002661A
Cited
US1641574A
Cited
US2861643A
Cited
US3131666A
Cited
US3306249A
Cited
US3421472A
Cited
US3584592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |