Patent US4989691A successfully refreshed from Google Patents.
US4989691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable boarding ladder and rescue device
Assignee: Individual
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Filing: 1990-05-07
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Granted: 1991-02-05
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Expires: 2010-05-07
Abstract
Abstract According to the preferred embodiment depicted, the inflatable boarding ladder comprises upper and lower ladder sections with stiffening rails and hand-holds interconnected by inflatable steps and the ladder back. The upper section is attached to the boat through a telescoping rod engaging and pivoting on mounting brackets. A pillow section provides hull standoff. The articulating lower ladder section pivots about the lower end of the upper section. A ballast section submerges the tapered lower ladder end into the water to ease access and to stabilize the ladder. Inflation and deployment of the ladder is by a gas source such as a foot pump or carbon dioxide cartridge. A deflation orifice permits storage in a soft pack and deck mounted cannister.
Inventors
- 👤 C. William Wilkerson
- 👤 James W. Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:06
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/14; B63B27/146; B63B27/143; B63B2027/145
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
An inflatable boarding ladder for a boat adapted to extend from the boat downwardly into the surrounding water comprising: (a) an inflatable upper ladder section adapted to be secured to the boat and, when deployed, extending downwardly from an exterior portion of the boat; (b) an inflatable lower ladder section secured to a lower portion of the upper ladder section and dependent therefrom; (c) means for moveably securing the lower ladder section to the upper ladder section such that the lower ladder section may pivot about the upper section; and (d) means associated with the lower ladder section for at least partially submerging the same in the surrounding water while the lower ladder section is dependent from the upper ladder section.
Claim 2
Dependent Claim
121 words
An inflatable boarding ladder for a boat adapted to extend from the boat downwardly into the surrounding water comprising: (a) an inflatable upper ladder section adapted to be secured to the boat and, when deployed, extending downwardly from an exterior portion of the boat; (b) an inflatable lower ladder section secured to a lower portion of the upper ladder section and dependent therefrom; (c) means for moveably securing the lower ladder section to the upper ladder section such that the lower ladder section may pivot about the upper section; and (d) means associated with the lower ladder section for at least partially submerging the same in the surrounding water while the lower ladder section is dependent from the upper ladder section.
Claim 3
Dependent Claim
25 words
The inflatable ladder of claim 1 wherein the same includes an enclosure for holding the ladder when the same is in a non-deployed uninflated mode.
Claim 4
Dependent Claim
14 words
The inflatable ladder of claim 1 including inflation means associated with the inflatable ladder.
Claim 5
Dependent Claim
58 words
The inflatable ladder of claim 3 wherein the inflation means comprises a gas container associated with the ladder and wherein the gas container is provided with means for actuating the same such that upon actuation the gas container is opened to deploy a gas throughout the inner portion of the ladder for the purpose of inflating the same.
Claim 6
Dependent Claim
29 words
The inflatable ladder of claim 3 wherein the inflation means includes an inflation valve formed in the wall of the ladder and adapted to connect to an air source.
Claim 7
Dependent Claim
28 words
The inflatable ladder of claim 1 including a ladder mounting mechanism associated with the upper ladder section for securing the inflatable ladder to the boat above the water.
Claim 8
Dependent Claim
23 words
The inflatable ladder of claim 6 wherein the ladder mounting mechanism includes means for pivotly mounting the upper ladder section to the boat.
Claim 9
Dependent Claim
50 words
The inflatable ladder of claim 7 wherein the means for pivotly mounting the upper ladder section includes an elongated bar secured to the boat and a girt sleeve associated with the upper ladder section and extending around the bar so as to secure the upper ladder section to the boat.
Claim 10
Dependent Claim
31 words
The inflatable ladder of claim 8 wherein the elongated bar includes telescoping ends that having a locking means associated therewith to maintain the telescoping ends in an extended or retracted mode.
Claim 11
Dependent Claim
14 words
The inflatable ladder of claim 9 wherein the locking means is a cam lock.
Claim 12
Dependent Claim
48 words
The inflatable ladder of claim 1 wherein both the upper and lower ladder sections include a pair of laterally spaced side rails interconnected by a series of spaced steps and wherein the side rails and steps are hollow so as to give rise to an inflatable ladder construction.
Claim 13
Dependent Claim
23 words
The inflatable ladder of claim 11 wherein the steps include at least partially rigid inserts for reducing deflection of the steps under load.
Claim 14
Dependent Claim
21 words
The inflatable ladder of claim 11 wherein the side rails include handhold means to assist a swimmer in boarding the boat.
Claim 15
Dependent Claim
17 words
The inflatable ladder of claim 13 wherein the handhold means are handles attached to the side rails.
Claim 16
Dependent Claim
26 words
The inflatable ladder of claim 1 wherein the means for partially submerging the lower ladder section includes a ballast section secured to the lower ladder section.
Claim 17
Dependent Claim
25 words
The inflatable ladder of claim 15 wherein the ballast section is weighted and has holes permitting water entry and baffles to slow release of water.
Claim 18
Dependent Claim
81 words
An inflatable ladder for use in boarding a boat comprising: (a) a main inflatable ladder section having inflatable side rails and step means incorporated; (b) means associated with the main ladder section for moveably mounting the inflatable ladder to the boat permitting movement between a generally horizontal non-loaded position and a second generally vertical loaded position; and (c) means associated with the main ladder section for at least partially submerging the lower portion thereof when the same assumes the non-loaded position.
Claim 19
Dependent Claim
81 words
An inflatable ladder for use in boarding a boat comprising: (a) a main inflatable ladder section having inflatable side rails and step means incorporated; (b) means associated with the main ladder section for moveably mounting the inflatable ladder to the boat permitting movement between a generally horizontal non-loaded position and a second generally vertical loaded position; and (c) means associated with the main ladder section for at least partially submerging the lower portion thereof when the same assumes the non-loaded position.
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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |