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Publication numberUS1038928 A
Publication typeGrant
Publication dateSep 17, 1912
Filing dateMar 9, 1912
Priority dateMar 9, 1912
Publication numberUS 1038928 A, US 1038928A, US-A-1038928, US1038928 A, US1038928A
InventorsChristian Ludwig Menzel
Original AssigneeChristian Ludwig Menzel
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1038928 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




1,038,928, Patented Sept. 17, 1912.


Patented Sept. 17, 1912.

Application filed March e, 1912. serial-no. 682,678.

Be it known that I Cmus'rmrz LUDWIG MENZEL, a subject of the Km of Great Britain, residing at Nobby, in t e State of Queensland, Commonwealth of Australia, farmer, have invented certain new and useful Improvements ,in or Connected with Boats, of which the following is a specification. 4

This invention relates to improvements in or connected with boats, which improvements have been devised in order to increase the buoyancy of a boat and to keep it afloat should it have sprung a leak or be otherwise seriously damaged. Furthermore, the 1mprovements are exceedingly light, strong and easy to attach to a boat, while they will prevent the same from being overturned even in a very rough sea. a

In the accompanying sheet of explanatory drawings :F1gure 1 is a view in perspective showing a boat fitted with the invention, while Figs. 2, 3 and 4 are views showing constructional details of the invention hereinafter fully described.

In these drawings like characters of reference have been employed to indicate similar parts in the different views and the letter a designates the boat which may be of the type shown or of any other approved design.

The improvements consist essentially in providing a plurality of inflatable air-tight tubes or elongated flexible compartments 1) which may be secured adjustably to the sides of the said boat by means of cords 0 or other flexible members. tubes or compartments bmay be constructed of rubber surrounded or reinforced with a canvas or other woven fabric covering'd or it inay be made of fairly thick vulcanized rubber or of prepared canvas or like material. The said tubes or compartments 6 are placed end to end and completely or partially surround the outer periphery of the boat, and their diameters may be less at the bow and stern ends than at the center thereof. A suitable number of loops e rings or the like are attached to or form on the lower parts of the said tubes or compartments b and to these said rin s are affixedthe ends of the ropes or cor s c which pass downwardly'to and around pulleys f or the like secured to the side portions of the boat. From the said pulleys f the ropes or cords pass upwardly through loops g,

These air-tight BOAT.

1,038,928. Specification of Letters Patent.

- To allwhom it may concern rings or the like formed on the inside of the coverings d of the tubes or compartments,

over the gunwales of the boat and then fasten in an approved way within the boat as to cleats k or the like. By means of these ropes c and pulleys fthe air-tight tubes or compartments can'be raised or lowered to any desired height relatively to the sides of the boat in order to meet existing requirements. The said'tubes when not in use may be folded u and strapped neatly against thesides 0 the boat so as to occupy a very small space" and prevent injury through coming-into contact with hard ob jects when in motion; The said tubes or compartments b are fitted with valves 2'- to permit of them being inflated by means of an air pump in any approved Way and preferably when near the gunwale of the boat.

When inflated, the'tubes or compartments b can be lowered or forced into the water to a point whence their greatest amount of buoyancy may be obtained by ends of the cords c. .When correctly located the said tubes or compartments may be retained in position by securingthe cords c to the cleats h or other approved devices within the boat.

The object of the 100 s g 'is to insure. the tubes or compartments Being retained at all times close to the sides of the boat, at the same time leaving them free to move on the cords a.

The improvements are extremely simple and can be readily detached from a boat and the tubes or compartments deflated so as to be packed into a very small compass and conveniently placed to preserve them from injury from any cause whatsoever. Moreover, the free ends of'the cords 0 may be connected up in such a way that allthose fitted to one section of the'tubes or compartments may be operated simultaneously and can be retained xedly in a desired position by a single fastening devi cesee Fig. 4. In this said view the ends of the cords c are shown passing over the gunwale' of the boat and down to a horizontal cord 7' which is connected to a small winding drum is fitted with an operating handle I and retaining pawl m. The said cords a pass around rollers n of any approved form which are fitted to the inside of the boat and act as guides to insure the cords 0 operating in a satisfactory manner. \Vhen the handle Z is rotated the cord j is wound upon the drum is and the cords a are drawn into the boat thereby elevating the inflatable tubes b. -The said tubes maybe lowered by raising the pawl m and reversing the motion of the handle 1, when the said tubes will descend by gravity to the desired point. I; may be made collapsible or detachable to economize space within the boat and one drum may be used to simultaneously wind the cord 7' of two adjacent tubes or compartments.

.What I do claim is 1. The combination with a boat, of inflatable and collapsible tubes or compartments surrounding the outer periphery of said boat, cords secured to said tubes and passing downwardly to and around pulleys fitted to the sides of the boat, loops or rings on the inside of said tubes for engaging said cords and means for securing the free ends of the The handle I on the winding drum.

said cords, substantially as describedand for the purposes set forth.

2. The combination with a boat, of externally disposed inflatable and collapsible tubes or compartments surrounding the outer periphery of said boat, cords attached to said tubes and assing around rollers on the outside and inslde of the boat and having their opposite ends secured to horizontal cords within the boat, and a winding drum fitted with a handle and retaining pawl for perating said horizontal cords, substantially as described and illustrated and for vthe purposes set forth.

In witness whereof I have signed this specification in the presence of two witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2543404 *Oct 16, 1948Feb 27, 1951Viktor HarastyBoat fender
US4817555 *Sep 25, 1987Apr 4, 1989Meinen Lee OBoat flotation collar
US4838196 *Aug 30, 1988Jun 13, 1989Ingram Robert TKayak safety sponsons
US6044789 *Jun 17, 1999Apr 4, 2000Kurzman; GeorgeFabric skinned inflatable dory
US6343562 *Jul 24, 2000Feb 5, 2002Robert T. IngramCanoe and kayak mid-point sponsons safety
US6435125May 24, 2001Aug 20, 2002Float Rail, Inc.Float switch activation assembly
US6470818Aug 28, 2001Oct 29, 2002Float Rail, Inc.Automatic inflating watercraft flotation device
US6484656Apr 10, 2001Nov 26, 2002Float Rail, Inc.Automatic inflating boat flotation device
US6802274Aug 19, 2002Oct 12, 2004Float Rail, Inc.Inflating watercraft flotation device
US6814019 *Aug 19, 2002Nov 9, 2004Floatlogic, Inc.Inflating watercraft flotation device
US6830004Aug 19, 2002Dec 14, 2004Floatlogic, Inc.Inflating watercraft flotation device
US6845726Aug 19, 2002Jan 25, 2005Floatlogic, IncInflating watercraft flotation device
US7156033Feb 27, 2004Jan 2, 2007Floatlogic, Inc.Inflating aircraft flotation device
US9180945 *Feb 25, 2013Nov 10, 2015Tony MearsSalvage rail flotation device and method
US20030213420 *Aug 19, 2002Nov 20, 2003Mears Tony W.Inflating watercraft flotation device
US20040003766 *Aug 19, 2002Jan 8, 2004Mears Tony W.Inflating watercraft flotation device
US20040139904 *Jul 8, 2003Jul 22, 2004Mears Tony W.Inflating watercraft support device
US20040226498 *Feb 27, 2004Nov 18, 2004Mears Tony W.Inflating aircraft flotation device
US20040261686 *Jun 8, 2004Dec 30, 2004Mears Tony W.Inflating flotation and stability device
US20050268837 *Jun 8, 2004Dec 8, 2005Mears Tony WInflating watercraft flotation device
US20150040815 *Aug 8, 2013Feb 12, 2015Ivan L. NakamotoMultifunctional apparatus and method for light watercraft portaging, self-rescuing, and stabilizing
EP1277651A1 *Jul 19, 2002Jan 22, 2003B.O.U.W. Beerdsen B.V.Device for height adjustment of fenders mounted on a vessel
U.S. Classification114/360, 114/219
Cooperative ClassificationB63B43/14