Patent US3689950A successfully refreshed from Google Patents.
US3689950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination boat trailer
Assignee: Individual
•
Filing: 1970-03-31
•
Granted: 1972-09-12
•
Expires: 1990-03-31
Abstract
Abstract A boat construction having a pair of spaced-apart slots near the stern open to the bottom of the boat and the stern wall of the boat and a retractible running gear pivotally mounted in the slots between a land transport position and a retracted position. A detachable hitch having a three-point connection to the bow of the boat and a universal joint connection to a holding vehicle.
Inventors
- 👤 Jerzy George Jalowiecki
- 👤 Jan Metelski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:38
CPC Classifications
B; B63; B63C; B63C13/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
A boat hull comprising a bow and a stern and a bottom wall, the bottom wall defining a central longitudinal boat supporting surface, a pair of longitudinal parallel slots in said bottom wall and opening vertically therefrom and extending a predetermined distance from and opening into the stern from the bottom wall and extending toward said bow a predetermined distance in the bottom wall and each defining a rearwardlyopening, enclosed well within the span of said bottom wall for reducing the drag at the stern of the hull, a central supporting surface in said bottom wall being defined between said wells and substantially immediately flanked by said wells; and retractible running gear provided in the wells for pivoting movement between a position with the running gear in the well substantially within the limits of the hull and to a position pivoted beneath the wells to a land transport position wherein the running gear protrudes downwardly from the wells to support the boat.
Claim 2
Dependent Claim
162 words
A boat hull comprising a bow and a stern and a bottom wall, the bottom wall defining a central longitudinal boat supporting surface, a pair of longitudinal parallel slots in said bottom wall and opening vertically therefrom and extending a predetermined distance from and opening into the stern from the bottom wall and extending toward said bow a predetermined distance in the bottom wall and each defining a rearwardlyopening, enclosed well within the span of said bottom wall for reducing the drag at the stern of the hull, a central supporting surface in said bottom wall being defined between said wells and substantially immediately flanked by said wells; and retractible running gear provided in the wells for pivoting movement between a position with the running gear in the well substantially within the limits of the hull and to a position pivoted beneath the wells to a land transport position wherein the running gear protrudes downwardly from the wells to support the boat.
Claim 3
Dependent Claim
37 words
A boat hull as defined in claim 1 wherein longitudinal ribs extend forwardly on the bottom wall as the projection of the slots and the central supporting surface is defined between the slots and the longitudinal ribs.
Claim 4
Dependent Claim
44 words
A boat hull as defined in claim 1, wherein the supporting surface of the bottom wall near to the bow defines an inverted shallow V shape while the supporting surface near the stern of the boat between the wells defines a shallow V shape.
Claim 5
Dependent Claim
27 words
A boat hull as defined in claim 1, wherein the slots defined in the stern of the boat extend less than half the height of the stern.
Claim 6
Dependent Claim
28 words
A boat hull as defined in claim 1, wherein an aerodynamic lip is provided at the leading edge of the slots in the bottom wall of the boat.
Claim 7
Dependent Claim
42 words
A boat hull as defined in claim 1, wherein the running gear includes a wheel mounted to a resiliently mounted pivoting member for pivoting movement between a retracted position and a land transport position whereby the wheel protrudes from the bottom slot.
Claim 8
Dependent Claim
46 words
A boat hull as defined in claim 6, wherein the wheel supporting member includes a crank arm resiliently mounted to a rotating shaft member extending laterally across the boat and each crank arm fixed to said shaft provided in each well mounts a freely rotating wheel.
References Cited (Backward Citations)
US3121238A
Cited
US3117544A
Cited
US3190587A
Cited
US3154799A
Cited
US3191572A
Cited
US3436773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |