US2003694A - Self-dumping scow - Google Patents

Description

June 4, 1935. J. K. MUNSON 2,003,694

SELF DUMPING s'cow Filed Aug. 15, 1953 Patented June 4, 1935 UNITED STATES PATENT OFFICE SELF-DUMPING SCOW John Kimball Munson, Olympia, Wash. I

Application August 15,

3 Claims.

This invention relates to a self-dumping scow, and it is primarily an object of the invention to provide means whereby as a result of flooding the scow may be caused to turn over bottom up to discharge the cargo, wash its deck and return to normal upright position on an even keel ready for another load. 7

The invention consists in the details of construction and in the combination and arrangement-of the several parts of my improved selfdumping scow whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the; accompanying drawing, Wherein:-

Figure l is a view in top plan of a scow constructed in accordance with an embodiment of my invention;

Figure 2 is a view partly in side'elevation and partly in sectionof thescow as illustrated in Figure l;

Figure 3 is a transverse sectional view taken substantially on the line 33 of Figure 1;

Figure 4 is a view inenduelevation with a portion broken away of the scow nearly bottom up.

As disclosed in the accompanying drawing, my improved scow comprises an upper deck I and an inner deck 2 extending from one end to the other of the scow and spaced from the bottom 3 to position said lower deck'Z slightly above the no-load water line of the scow. The opposite end portions of the scow are preferably upwardly rounded as illustrated in the accompanying drawings, and the upper deck I at its opposite end portions and at the transverse center of the scow is provided with the upstanding air tanks 4 and said upper deck I at opposite sides of each of the tanks 4 is further provided with hatches 5. Between the air tanks 4 the upper deck I is provided with a cargo space 6 defined by the upstanding enclosing walls 1. This top cargo space 6 also extends substantially from one tank 4 to the other and is disposed laterally equal distances beyond the transverse center of the scow.

Depending from the top deck I and spaced from the side walls 8 of the scow are the panels 9 for trapping water between said panels and the side walls 8 of the scow as hereinafter to be more particularly referred to. The side walls 8 adjacent to the opposite ends thereof have disposed therethrough the flood lines It), the outer or reduction ends of which being above 1933, Serial No; 685,215

line sections H adjustable from a substantially horizontal position to a substantially vertical position. As is illustrated in the accompanying drawing, each of the sections ll carries. an arm it? which is connected'by a lever M or the like with a crank l5 carried by the lower portion of a vertically disposed shaft Hi. This shaft l5 extends above the upper deck I and carries an operating crank I! or other member whereby the shaft l6 may be rotated in required-direction to either raise or lower the pipe or: line section I I. As is particularly illustrated in Figure 2, each of the pipe or line sections 'II is of a length to extend up through a hatchwayi when said pipe or line section is raised to its substantially vertically disposed position.

The space 6 is loaded as desired anda lineis aged with each of the operating members I] adapted to lead to a tug boat orother point so that upon pulling on such line or lines the sections I I may be lowered to substantially horizontal positions, thus allowing the sea water to ,enter between the decks l and 2 to floor the compartment therebetween. This lowering of the sections l I occurs of course after the scow has been transported to a desired point of discharge and byjuse of the lines hereinbefore mentioned -it will heap parent that the desired dumping action may be efiected without an attendant being on the scow.

As the compartment of the scow floods the scow is caused to settle downwardly into the sea from the weight on the load space 6. Being unable to maintain its balance, the scow lists to one side or the other and as the water continues to enter through the pipe lines It at one side thereof, the top load or cargo will carry the scow over and bottom up. As this load is prevented from sliding by the walls I, the air tanks 4 will be forced under the water before a complete discharge of the load or cargo is obtained. This action also assures the sea water washing the top deck after the discharge of the load.

In rolling over, the flood water is trapped in an enclosure or space between a panel 9 and a side wall 8 of the scow which causes the scow to rollback in the opposite direction and with the upward force or pull of the tanks 4 together with the action of the water continuing to run into the compartment, the scow sinks lower and rolls back deck upward by buoyancy of the chamber l8 between the inner deck 2 and the bottom 3 of the scow. The water will then run out the lower lines I0 until the compartment between the decks land 2 is free from water and the scow uprighted.

From the foregoing description it is thought to be obvious that a self-dumping scow constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:

1. A self-dumping scow having a top deck and a bottom, an inner deck within the scow extending from one end to the other and spaced from the bottom of the scow to position said lower deck slightly above the no-load water line of the scow, an upstanding enclosure carried by the top deck to provide a top cargo space, air tanks mounted upon the top deck fore and aft of the enclosure, panels depending from the top deck and spaced from the side walls of the scow to provide pockets to catch water as the scow rolls over to an inverted position, said panels terminating at a point substantially midway between the top deck and the inner deck, and flood lines mounted upon the inner deck at opposite sides of the scow and adjacent to the opposite ends thereof, said flood lines having their induction ends above the water line when the scow is substantially free of load, said flood lines having swinging sections within the scow adjustable from a substantially horizontal position to a substantially vertical position and means for swinging said sections, said air tanks being aligned lengthwise of the scow and positioned substantially at the. transverse center thereof. I

2. A self-dumping scow having a top deck and a bottom, an inner deck within the scow extending from one end to the other and spaced from the bottom of the scow to position said lower deck slightly above the no-load water line of the scow, an upstanding enclosure carried by the top deck to provide a top cargo space, an tanks mounted upon the top deck fore and aft of the enclosure, panels depending from the top deck and spaced from the side walls of the scow to provide pockets to catch water as the scow rolls over to an in- Verted position, said panels terminating at a point substantially midway between the top deck and the inner deck, flood lines mounted upon the inner deck at opposite sides of the scow and adjacent to the opposite ends thereof, said flood lines having their induction ends above the water line when the scow is substantially free of load, said 'flood lines having swinging sections within the scow adjustable from a'substantially horizontal position to a substantially vertical position, and means extending above the top deck for swinging said sections, said air tanks being aligned lengthwise of the scow and positioned substantially at the transverse center thereof, 7

3. A self-dumping scow having a top deck and a bottom, an inner deck within the scow extending from one end to the other and spaced from the bottom of the scowto position said lower deck slightly above the no-load water line of the scow, an upstanding enclosure carried by the top deck to provide a top cargo space, air tanks mounted upon the top deck fore and aft of the enclosure, panels depending from the top deck and spaced from the side walls of the scow to provide pockets to catch water as the scow rolls over to an inverted position, said panels terminating at a point substantially' midway between the top deck and the inner deck flood lines mounted upon the inner deck at opposite sides of the scow and adjacent to the opposite ends thereof, said flood lines having their induction ends above the water line when the scow is substantially free of load, said flood lines having swinging sections within the scow adjustable from a substantially horizontal position to a substantially vertical position, a' shaft extending down through the upper deck adjacent to each of the flood lines, means above the deck for rotating the shaft, and an operative connection between the lower portion of the shaft and the adjacent swinging section for moving said section from one position to another upon rotation of the shaft;

r JOHN KIMBAIL MUNSON.

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