US4291639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical isolation system for the mast and shrouds of a sailboat
Assignee: Individual
•
Filing: 1979-01-08
•
Granted: 1981-09-29
•
Expires: 1999-01-08
Abstract
Abstract An electrical isolation system is disclosed for use on sailboats having metal masts and shrouds for preventing accidental shocking or electrocution of persons who contact lower portions of the mast or shrouds and/or electrical conductors appended thereto when the top of the mast or shrouds come into contact with an electrical high voltage distribution or transmission line with the system including an insulating member separating the upper portion of the mast from a lower portion of the mast.
Inventors
- 👤 Glenn A. Burdick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/56; B; B63; B63B; B63B15/00; B63B15/02; B63B43/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
An electrical isolation system for use on sailboats having metal masts and shrouds for preventing accidental shocking or electrocution of persons who contact the lower portion of the masts and shrouds when an upper portion of the mast or a shroud come into contact with an electrical high voltage distribution or transmission line comprising a mast insulating member extending between an upper portion and a lower portion of said mast and a shroud insulating member extending between an upper and a lower portion of each shroud stay.
Claim 2
Dependent Claim
87 words
An electrical isolation system for use on sailboats having metal masts and shrouds for preventing accidental shocking or electrocution of persons who contact the lower portion of the masts and shrouds when an upper portion of the mast or a shroud come into contact with an electrical high voltage distribution or transmission line comprising a mast insulating member extending between an upper portion and a lower portion of said mast and a shroud insulating member extending between an upper and a lower portion of each shroud stay.
Claim 3
Dependent Claim
26 words
The electrical isolation system of claim 1 wherein said mast insulating member comprises a nonconductive material having a reinforcing tube extending therethrough parallel to said mast.
Claim 4
Dependent Claim
13 words
The electrical isolation system of claim 2 wherein said nonconductive material is wood.
Claim 5
Dependent Claim
46 words
The electrical isolation system of claim 1 wherein said mast insulating member comprises cores which extend into an upper portion and a lower portion of said mast integrally formed with a collar portion extending around outer surfaces on said upper and lower portions of said mast.
Claim 6
Dependent Claim
46 words
The electrical isolation system of claim 1 wherein said shroud insulating means comprises an insulating member surrounding and attached to an upper portion of said shroud stay and extending downwardly with the lower end thereof surrounding and fixed to a lower portion of said shroud stay.
Claim 7
Dependent Claim
63 words
The electrical isolation system of claim 1 wherein said shroud insulating means comprises a cap attached to a lower end of an upper portion of the shroud stay and a cap fixed to an upper end of a lower portion of a shroud stay with an insulating member extending therebetween to transmit the structural loads and prevent the conduction of voltage potential thereacross.
Claim 8
Dependent Claim
27 words
The electrical isolation system of claim 1 further comprising a means for insulating said upper and said lower portions of said mast from a sail mounted thereon.
Claim 9
Dependent Claim
38 words
The electrical isolation system of claim 7 wherein said insulating means comprises a coating of moisture repellant and electrical insulating material applied to at least a portion of a sail in an area adjacent said mast insulating member.
Claim 10
Dependent Claim
38 words
The electrical isolation system of claim 1 wherein said mast insulating member comprises nonconductive material which extends upwardly into the upper portion of said mast and downwardly into the lower portion and which is secured to said portions.
Claim 11
Independent Claim
39 words
The method of electrically insulating a metal mast and shrouds on a sailboat comprising inserting electrically insulating materials intermediate the ends of the mast and shrouds at a distance substantially beyond a point for contact with persons on board.
Claim 12
Independent Claim
39 words
The method of electrically insulating a metal mast and shrouds on a sailboat comprising inserting electrically insulating materials intermediate the ends of the mast and shrouds at a distance substantially beyond a point for contact with persons on board.
Claim 13
Dependent Claim
24 words
The method of claim 1 further comprising coating a sail with a water repellant and electrically insulating material in the area adjacent said ends.
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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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |