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US3797442A Expired / Lapsed US ⏱️ 0.0 years remaining

Accident proof, tamper proof boat drain plug

Assignee: Individual
•
Filing: 1973-04-27
•
Granted: 1974-03-19
•
Expires: 1993-04-27
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Abstract

Abstract This device is a boat transom drain hole plug that is accident proof and tamper proof, at least against a single individual in that it takes the cooperation of at least two individuals to remove this plug. It comprises a pair of apertured, flanged adapters fitting in opposite sides of the boat transom drain hole and held in position by a threaded bolt therethrough and an elastic stop nut threaded thereon. The cylindrical portions of the adapters fit snugly within the drain hole, or within the metal sleeve lining the drain hole, if one is present. O-rings are set in and at least slightly extend from circumferential recesses in each cylindrical portion to seal against the drain hole wall or the metal sleeve lining the drain hole wall. To prevent any possible leakage through the adapter apertures, the bolt is also provided with a sealing O-ring extending slightly from a cylindrical recess in the bolt stem adjacent the bolt head, and a washer may be used between the elastic stop and the adjacent flange of the adjacent adapter. As thus set up, the drain plug cannot possibly loosen accidentally, and it can not be removed or vandalized by a single individual. It takes two individuals, one inside and one outside the boat to install or remove this boat drain hole plug.

Inventors

  • 👤 Rae T Mc

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 22:12
CPC Classifications
B; B63; B63B; B63B13/00; B63B13/02

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 159 words
For use in a boat transom (12) having a drain hole (14); a drain hole plug (18) comprising a pair of apertured (28) adapters (19), one of said adapters (19) fitting partially into each of the opposite sides of said drain hole (14) and also fitting partially against the opposite sides of the boat transom (12), a threaded (36) bolt (32) fitted through the adapters (19) in the drain hole (14), and a nut (38) threaded on said bolt (14) holding said adapters (19) in the drain hole (14), said bolt (32) having its head (34) on one side of the boat transom (12) and said threaded nut (38) being on the other side of the boat transom, whereby simualtaneous operation on the bolt head (34) and the threaded nut (38) by one individual inside the boat transom (12) and by another individual outside the boat transom is necessary to remove the plug (18) from the drain hole (14).
Claim 2
Dependent Claim 159 words
For use in a boat transom (12) having a drain hole (14); a drain hole plug (18) comprising a pair of apertured (28) adapters (19), one of said adapters (19) fitting partially into each of the opposite sides of said drain hole (14) and also fitting partially against the opposite sides of the boat transom (12), a threaded (36) bolt (32) fitted through the adapters (19) in the drain hole (14), and a nut (38) threaded on said bolt (14) holding said adapters (19) in the drain hole (14), said bolt (32) having its head (34) on one side of the boat transom (12) and said threaded nut (38) being on the other side of the boat transom, whereby simualtaneous operation on the bolt head (34) and the threaded nut (38) by one individual inside the boat transom (12) and by another individual outside the boat transom is necessary to remove the plug (18) from the drain hole (14).
Claim 3
Dependent Claim 20 words
The plug of claim 1, said adapters (19) having stepped flanges (22) abutting the outer surfaces of the transom (12).
Claim 4
Dependent Claim 33 words
The plug of claim 1, each said adapter (19) having a cylindrical portion (20) fitting into the drain hole (14), and a stepped flange portion (22) abutting a surface of the transom (12).
Claim 5
Dependent Claim 28 words
The plug of claim 3, the added lengths of said cylindrical portions (22) being not greater than the thickness of the transom (12) at the drain hole (14).
Claim 6
Dependent Claim 35 words
The plug of claim 4, each cylindrical portion (20) having a circumferential recess (24) and an O-ring (26) in and extending from said recess (24) providing a substantial seal against the drain hole (14) wall.
Claim 7
Dependent Claim 37 words
The plug of claim 5, said nut (38) being threaded on said bolt (32) against one flange portion (22), the bolt head (34) abutting against the other flange portion (22), said nut being an elastic stop nut.
Claim 8
Dependent Claim 42 words
The plug of claim 6, said bolt (32) having a circumferential recess (42) adjacent to but slightly spaced from its bolt head (34), and an O-ring (44) in and extending from said bolt circumferential recess (42) against the adapter (19) aperture wall.
Claim 9
Dependent Claim 69 words
The plug of claim 7, and a washer (46) between said elastic stop nut (38) and the adjacent flange portion (22) surface, the transom drain hole (14) having a metal sleeve (16) lining it, said O-rings (26) in said cylindrical portions (20) sealing against said metal lining sleeve (16), the bolt threaded portion (36) and elastic stop nut (38) extending into the inner boat side of the transom (12).

References Cited (Backward Citations)

US936312A Cited
US2321515A Cited
US2476601A Cited
US2730062A Cited
US2997975A Cited
US3067714A Cited
US3188994A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-03-18 1977-09-17 1978-03-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-03-18 1981-09-17 1982-03-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-03-18 1985-09-17 1986-03-19 $7700.00 Window Closed / Lapsed

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