US4541507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal folding ladder for boats
Assignee: Individual
•
Filing: 1984-10-09
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Granted: 1985-09-17
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Expires: 2004-10-09
Abstract
Abstract A universal folding ladder for inflatable boats and pleasure craft comprising a tubular structure intended for straddling the gunwale of a boat and including at least two L-like elements extending parallel to each other and being interconnected at the ends thereof by at least two adjustable U-like elements, said structure being connected at one side to the boat through a latch means for a catch element, and on the other side to swingingly connected rungs, between the L-like elements there being mounted a flat rest base member including one or more boards.
Inventors
- 👤 Silvano Gibellato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:11
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34; E06C1/36; B; B63; B63B; B63B27/00; B63B27/14; E06C1/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A universal folding ladder for boats, characterized in that it comprises a tubular structure intended for straddling the gunwale of a boat and including at least two L-like elements extending parallel to each other and being interconnected at the ends thereof by at least two adjustable U-like elements, said structure being connected, on the one side, to the boat through a latch means for a catch element, and on the other side, to swingingly connected rungs, between said L-like elements there being mounted a flat rest base member.
Claim 2
Dependent Claim
88 words
A universal folding ladder for boats, characterized in that it comprises a tubular structure intended for straddling the gunwale of a boat and including at least two L-like elements extending parallel to each other and being interconnected at the ends thereof by at least two adjustable U-like elements, said structure being connected, on the one side, to the boat through a latch means for a catch element, and on the other side, to swingingly connected rungs, between said L-like elements there being mounted a flat rest base member.
Claim 3
Dependent Claim
74 words
A universal folding ladder for boats, according to claim 1, characterized in that said tubular structure comprises metal L-like elements extending parallel to one another and having on the sidepieces thereof an array of holes aligned on a generatrix line of the cylinder defining the sidepiece and formed in the outward side surface of the sidepiece located over the boat gunwale and in the inward side surface of the sidepiece located alongside the gunwale.
Claim 4
Dependent Claim
76 words
A universal folding ladder for boats, according to claim 1 or 2, characterized in that said L-like elements are connected to tubular U-like metal elements of a slightly smaller diameter than the former and being adjustable relatively thereto through an adjustment device including an elastic V-like bar, inserted through the U-like element whereto there is welded to one end a small metal cylinder standing out of a hole formed at the end of said U-like element.
Claim 5
Dependent Claim
126 words
A universal folding ladder for boats, according to claim 1 or 2, characterized in that on the bottom of the U-like element located over the boat gunwale there is provided a latch means including a metal perforated bracket welded at the bottom, through said hole there being passed a bolt, subsequently associated with a nut, rigid with a first short pipe section in turn welded to a second pipe section lying parallel to the bottom of the U-like element, said pipe section being located between two substantially cylinderical catch elements of the same inside diameter and formed from a plastic material, rigid with a flat base member in turn attached to the boat gunwale, a wire being insertable through the catch elements and second pipe section.
Claim 6
Dependent Claim
47 words
A universal folding ladder for boats, according to claim 4, characterized in that said wire is formed at one end with a diametrical hole wherethrough a ring is inserted, and with a projecting step, at the other there being provided a thread for a locking ring nut.
Claim 7
Dependent Claim
88 words
A universal folding ladder for boats, according to claim 1 or 2, characterized in that said U-like element located alongside the boat gunwale has mutually swingingly connected rungs associated therewith, said connections being provided by C-like metal hinges attached one to each arm of a rung and having, those belonging to one and the same rung, a common pivot axis, the pivot pin comprising a bolt passed in between the holes formed at the free ends of the rungs and hinge and then secured by means of nut.
Claim 8
Dependent Claim
72 words
A universal folding ladder for boats, according to claim 1 or 2, characterized in that between the L-like elements, there is located a flat rest base member comprising one or more boards made rigid with one another and, in a detachable fashion, with the sidepieces of the L-like elements through semicylindrical metal supports, on the one side, and cylindrical supports on the other, having a larger diameter than that of said sidepieces.
Claim 9
Dependent Claim
45 words
A universal folding ladder for boats, according to claim 6, characterized in that said tubular structure, rungs, hinges, and latch means are formed from either stainless steel or aluminum, the boards of the rest base member being instead of either wood or a plastic material.
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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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |