US3608754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Launching and recovery guide
Assignee: PARK AERIAL SURVEYS Inc
•
Filing: 1970-04-14
•
Granted: 1971-09-28
•
Expires: 1990-04-14
Abstract
Abstract A launching and recovery guide for a boat trailer comprises a floatable concave member hingedly connected to the trailer for movement between a normally retracted position below the rear bolsters of the trailer to protracted positions above the bolsters. The concave member is adapted to contact the bottom of the hull of the boat as it is being launched from the trailer or recovered and retain it in a longitudinal position against the forces of tide, water currents and wind until the launching or recovery is completed.
Inventors
- 👤 Wallace Sidney Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:06
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/10; B60P3/1033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
The combination of a boat trailer including a frame and front and rear bolsters for supporting a boat, a floatable guide member carried by the trailer for movement between a normally nonfloating retracted position below the bolsters and a floating position above the bolsters, said guide member conforming generally to portions of the bottom of the hull of the boat to be carried by the trailer, the floatable member comprising a transverse concave member vertically movable in a path adjacent to the rear bolster, a pair of arms pivotally hinged forwardly of the trailer to each side of the frame and diverging rearwardly intermediate the frame where they are secured to the concave member, and flotation means secured to the arms.
Claim 2
Dependent Claim
121 words
The combination of a boat trailer including a frame and front and rear bolsters for supporting a boat, a floatable guide member carried by the trailer for movement between a normally nonfloating retracted position below the bolsters and a floating position above the bolsters, said guide member conforming generally to portions of the bottom of the hull of the boat to be carried by the trailer, the floatable member comprising a transverse concave member vertically movable in a path adjacent to the rear bolster, a pair of arms pivotally hinged forwardly of the trailer to each side of the frame and diverging rearwardly intermediate the frame where they are secured to the concave member, and flotation means secured to the arms.
Claim 3
Dependent Claim
19 words
The combination as defined by claim 1 in which the flotation means comprises a block of foamed plastic material.
Claim 4
Dependent Claim
15 words
The combination as defined by claim 2 in which the plastic material is polystyrene resin.
Claim 5
Dependent Claim
19 words
The combination as defined by claim 1 in which the outer ends of the concave member have vertical tips.
Claim 6
Dependent Claim
21 words
The combination as defined by claim 1 in which the concave member is in the general shape of an obtuse angle.
Claim 7
Dependent Claim
22 words
The combination as defined by claim 1 and antifriction means carried by the guide member for contacting the hull of the boat.
Claim 8
Dependent Claim
15 words
The combination as defined by claim 6 in which the antifriction means comprises roller bearings.
Claim 9
Dependent Claim
27 words
The combination as defined by claim 7 in which the roller bearings are moved on rocker arms, said rocker arms being pivotally connected to the guide member.
Claim 10
Dependent Claim
39 words
The combination as defined by claim 1 and vertical posts secured to and extending upwardly from the guide member, rocker arms pivotally connected to the upper ends of the vertical posts and rollers rotatably mounted on said rocker arm.
References Cited (Backward Citations)
US2371461A
Cited
US3119127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |