US3977690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer, particularly for transporting and launching boats
Assignee: Individual
•
Filing: 1975-01-03
•
Granted: 1976-08-31
•
Expires: 1995-01-03
Abstract
Abstract A trailer is formed of a core with upper sloping surfaces having protruding bosses engageable by angled protrusions from load-bearing arms. The core is placed between the trailer wheels, which are preferably wider than they are high. The arm protrusions can be turned to engage the bosses in different ways to produce different load-bearing configurations.
Inventors
- 👤 Patrick Carn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:00
CPC Classifications
B; B63; B63C; B63C13/00; B62; B62B; B62B1/00; B62B1/26; B62B2202/00; B62B2202/40; B62B2202/403
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
A transport and launching trailer comprising: a pair of wheels carried by an axle; a pair of adjustable load-bearing arms; and a rigid, unitary core supporting both said axle and said arms, and occupying the space between said wheels, the core having convergingly sloping upper surfaces, each said surface having a protruding boss adapted to be slideably engaged by a mating protrusion from one of said load-bearing arms.
Claim 2
Dependent Claim
68 words
A transport and launching trailer comprising: a pair of wheels carried by an axle; a pair of adjustable load-bearing arms; and a rigid, unitary core supporting both said axle and said arms, and occupying the space between said wheels, the core having convergingly sloping upper surfaces, each said surface having a protruding boss adapted to be slideably engaged by a mating protrusion from one of said load-bearing arms.
Claim 3
Dependent Claim
14 words
The trailer of claim 1, wherein said wheels are wider than they are high.
Claim 4
Dependent Claim
19 words
The trailer of claim 1, wherein said core is traversed by a horizontal passage haing bearings for said axle.
Claim 5
Dependent Claim
20 words
The trailer of claim 1, wherein said boss is polygonal, so as to prevent rotation of said engaged mating protrusion.
Claim 6
Dependent Claim
24 words
The trailer of claim 1, wherein each said load-bearing arm protrusion has two segments inclined at a small dihedral angle relative to each other.
Claim 7
Dependent Claim
20 words
The trailer according to claim 5, wherein each of said bosses protrudes at an angle different from said dihedral angle.
Claim 8
Dependent Claim
12 words
The trailer of claim 6, wherein said boss angle is about 45°.
Claim 9
Dependent Claim
12 words
The trailer of claim 5, wherein said dihedral angle is about 20°.
Claim 10
Dependent Claim
47 words
The trailer of claim 6, wherein each said bearing arm is engageable upon a respective one of said bosses in one of two positions rotationally displaced from each other by 180°, thereby providing either low and relatively widely spread arms, or high and relatively closely spaced arms.
Claim 11
Dependent Claim
29 words
The trailer of claim 9, wherein said arms are adapted for carrying a single-hull boat when low and widely spread, and a multi-hull boat when high and closely spaced.
Claim 12
Dependent Claim
22 words
The trailer of claim 1, wherein said core has an aperture above said axle passage for the attachment of trailer pulling means.
Claim 13
Dependent Claim
61 words
A transport and launching trailer comprising: a pair of wheels carried by an axle; a pair of adjustable load-bearing arms; and a rigid, unitary core supporting both said axle and said arms, and occupying the space between said wheels, the core having divergingly protruding bosses, each adapted to be slideably engaged by a mating protrusion from one of said load-bearing arms.
Claim 14
Dependent Claim
61 words
A transport and launching trailer comprising: a pair of wheels carried by an axle; a pair of adjustable load-bearing arms; and a rigid, unitary core supporting both said axle and said arms, and occupying the space between said wheels, the core having divergingly protruding bosses, each adapted to be slideably engaged by a mating protrusion from one of said load-bearing arms.
Claim 15
Dependent Claim
31 words
The trailer of claim 12, wherein the bosses and protrusions are so constructed that each protrusion is adapted to matingly engage its respective boss in either of two different angular relationships.
Claim 16
Dependent Claim
14 words
The trailer of claim 13, wherein the two angular relationships differ by substantially 180°.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |