US2476108A

US2476108A - Dump scow

Info

Publication number: US2476108A
Application number: US633229A
Authority: US
Inventors: John K Munson
Original assignee: LAVERNE E MUNSON
Current assignee: LAVERNE E MUNSON
Priority date: 1945-12-06
Filing date: 1945-12-06
Publication date: 1949-07-12
Anticipated expiration: 1966-07-12

Description

July- 12, 1949.

Filed Deo. 6, 1945 J. K. MUNSON 2,476,108

DUMP SCOW 2 Sheets-Sheet 2 JKMMM Patented July 12, 1949 DUMP SCOW John K. Munson, Olympia, Wash., assigner vto YLaverne E. Munson, Springfield, Ohio Application December ,6, '1945, Serial No. 633,229

7 Claims.

This invention relates generally to the class of soows and more particularly to scows of the self-dumping type.

An object of the present invention is to provide an improved self-dumping type of scow which is designed to have a greater load carry- 'ing capacity than 'scows of similar type at present in use.

Another object of the invention is to provide an improved self-dumping scow which is so designed that after the balance or equilibrium of the boat is upset by flooding a predetermined .portion thereof, the shifting of the load against a portion of the wall of the load space will facilitate the capsizing of the structure to bring about the complete dumping of the contents.

Another object of the invention is to provide 'an improved self-dumping scow carrying shiftable air chambers which may be adjusted athwartship for the purpose of regulating the speed or rapidity with which the vessel is returned to righted position.

Other objects and advantages of the invention will become apparent as the description of the same proceeds and the invention will be best understood from a consideration of the following detailed description taken in association with the accompanying drawings forming a part of this specification, with the understanding that the invention is not confined to a strict conformity with the showing of the drawings but may be changed or modied so long as such changes or modifications do not ldepart materially from the salient features of the invention as expressed in the appended claims.

In the drawings:

Figure 1 is a view in top plan of a dump vscow constructed in accordance with the present invention.

Figure 2 is a view of the same in side elevation, parts being broken away to show the raised .position of the ood pipes and the scow riding high in the water.

Figure '3 is a cross section taken substantially on the line 3 3 of Figure `2.

Figure 4 is a view in Side elevation correspond- "ing to Figure 2, with parts broken away to show the position of the ood vpipes for dumping, the scow being low inthe water.

Figure 5 is a 'cross section taken substantially on the line 5 5 of Figure 4 and showing the manner in which oodng is caused to capsize the scow. y

Figure 6 is an end View of the scow in fully Capsized position.

1n accordance with the present invention the .present improved self-dumping scow comprises 'the hull which is generally designated I0 and which consists of the side walls I I 'and the bottom I2 which is flat in accordance 'with the usual construction o'f such vessels and curved upwardly or is rounded at both ends as indicated at I2.

The numeral I3 generally designates the to'p deck, in the central part of which is formed the well or opening It?. through which is introduced the load to be carried.

Within the hull and spaced a substantial distance above the bottom I2 is the load deck which is designated I5 and at each `end of the well ill is a vertical wall I6 which extends downwardly to and joins the load deck I5.

Extending upwardly at an outward inclination from the load deck, adjacent to one side o'f the well, is 'the side wall I1 and at the opposite side of the well there extends upwardly from the load deck a corresponding side wall which is designated I8 and which extends upwardly and outwardly a substantial distance above the top deck I3 providing the dump panel I8. Thus there is formed below the level of the top deck I3 the relatively deep load space which is generally designated I9,

The load deck I5 is continued beyond the load space walls I6, I'I and I8 to join the side walls I'I and the upturned ends of the bottom, thereby forming what may be termed the inner deck which is generally designated I5 and which completely encircles the load space I9.

Between the inner deck and load deck and the bottom of the vessel is the dead air space or closed chamber 20 which functions as a float tank to 'assist in raising the boat after it has been dumped and has turned back to its upright position.

The load discharging panel I8 is upon the side of the scow which is first submerged in the dumping operation or, in other words, upon the side toward which the scow turns when capsizing. Upon this dumping side of the scow the inner deck l5' is sloped down slightly below the level of the load deck and adjacent to each end of this sloping part of the Vinner deck there is formed, adjacent to the Wall vI I, the longitudinally extending depression or well 2I.

At the outer end of each well 2|, by which is meant that end of the well farthest from the transverse center of the scow, there is formed at or just above the water line, the opening 22 'in which is pivotally or rotatably mounted the right angularly directed end portion 23 of a flood pipe 24, This flood pipe is of such length that 'gimme 'when it is vertically disposed it will have its other end extended above the top deck I3 through a hatchway 25 which is covered by the hatch 26.

The flood pipes 24, when in raised position, are lowered or allowed to move downwardly under the force of gravity so as to assume a substantially horizontal position Within the underlying Well, to permit water to flow in and ood the scow in the manner hereinafter described.

When the scow is loaded and the material therein is being transported to the desired location, the flood pipes 24 will be maintained in raised position and one suitable means is here illustrated for effecting the raising of the pipes and holding them in raised position and also for facilitating their quick release when the flooding of the scow is necessary.

The raising means here shown comprises a suitable support or standard 21 having rotatably mounted thereon a ratchet wheel 28, mounted upon a shaft 29, with which is connected a crank 30 to facilitate turning the shaft. The shaft 30 has attached thereto one end of a chain 3l which is Wound up on the shaft and the other end of the chain is connected with the adjacent pipe 24 in the manner sho-wn. The supporting structure 21 is mounted upon the top of the top `deck I3 over a flood pipe and the chain 3| passes downwardly from the shaft on which it is wound, to the pipe.

Pivotally coupled with the support 21 is a pawl o-r dog 32 which engages the ratchet wheel and holds the same against movement after the pipe ha-s been raised. This dog is designed to have attached to it one end of a rope, not shown, which extends to the tug or other boat pulling the scow so than an attendant upon the draft vessel can release one or both of the flood pipes 24 to effect the flooding and capsizing of the scow without having to go on board or go near to the scow.

At each end of the scow there is mounted upon the inner deck, the low partition wall 33 which extends from the adjacent end wall I6 of the load space to the end I2 of the scow bottom. Each of these walls or panels 33 has formed therethrough, flush with the surface of the load deck I5, the limber hole 34 to facilitate draining Water from the lower deck after the scow has been dumped and has returned to upright Y position.

At each end of the scow there is supported upon the top deck, the airtight oat chamber or float body generally designated 35. Each of these float bodies is adjustably secured in place by the securing members 36, which couple the float at one end with the body of the scow. By this means each of the floats may be shifted or adjusted transversely of the scow structure so as to obtain the proper working balance for bringing the scow right side up after the load is discharged but without bringing it back so quickly as to retain some of the load.

At the side of the scow opposite from the flood pipes 24 there is provided a vent 31 in the top deck which permits the escape of air from the space between the wall I1 and the adjacent side Wall II of the scow body, when the scow has been capsized and water is flowing into the flood Space and causing the flood pipe side of the scow to sink,

In the operati-on of the scow, the pivoted or swinging flood pipes 24 are, of course, first raised to the upright position shown in Figure 2 by the control means shown or by any other suitable means. In this connection, while each of the flood pipes 24 has been shown individually controlled by the crank and pawl and ratchet mechanism it is to be understood that the raising devices for the pipes may be coupled together in such manner as to effect the simultaneous raising of the pipes and simultaneous releasing of the same, to drop into their respective Wells.

After the flood pipes have been raised the scow may be loaded so that the load space may be completely lled or it may be partially filled, if desired, it being only necessary that a sufficient load be placed in the load space to give the necessary weight to carry the float tanks 35 completely under the surface of the water when the scow is capsized.

When ready to dump the load, the nood pipes 24 are released and they drop into the Wells 2I which are filled with water from a previous dumping operation. The presence of water in the wells or splash pits serves to check the fall of the flood pipes or, in other words, the water in the pits functions as a shock absorber. When the ood pipes are down, the Water runs into the scow onto the top of the inner deck in the area lying between the wall Il with which the flood pipes are connected, and the partiti-ons or panels 33. These panels 33 momentarily prevent or check the spread of the water over the inner deck to the opposite side of the scow and in this manner the scow is unbalanced and caused to capsize, turning in a direction to first submerge the extended wall panel I8.

As soon as the sc-ow begins to list as a result of flooding one side of the inner deck, the load in the load space I9 shifts toward the wall I8 and slides onto the panel extension I8', thereby causing the scow to completely turn over and effecting the discharge of the load therefrom.

When the scow turns over, the water continues to run in through the flood pipes causing the scow to sink to approximately one-third of its width whereupon the air or iioat tanks 35 swing the scow back toward normal or upright position assisted by the bottom or under deck oat chamber 20. Thus the entire structure rights itself and after m-oving back to upright position the float chamber 20 causes the empty scow to rise in the water.

As the scow comes back to upright position the load space will be filled with water but as the structure rises this water will flow out from the load space first through the upper or top scuppers 31 and then, after the boat has risen to a sulicient elevation, through the lower scuppers 38. As shown, these scuppers are in the form of pipes extending from and through the wall-s I1 and `I8 of the load space, outwardly through the adjacent side Walls II of the boat.

The water line, designated 39, is beloW the inlet ends of the flood pipes 24 and, consequently, when the boat has risen to this point the lower scuppers 38 and the flood pipes will be out of the Water or above the surface and the water will be completely drained from the Vload space and also from the inner deck I5- T-o facilitate complete drainage the side of the inner deck I5 nearest to the flood pipes 24, is cambered slightly.

By the provision of the limber holel 34 in each of the division or partition walls 33, the water is drained completely from that side of the load space opposite from the scupper pipes 38.

The deck floats 35 have been described as being secured in place by the securing elements 36 and it was stated that these floats are adjustable transversely of the scow structure.

While any suitable means may be provided for mounting the iloat 35 so that they may be adjusted transversely of the scow, the means here illustrated and found most satisfactory, comprises a pair of U beams 40 which are secured in spaced parallel relation transversely of the scow at each end, with the edges of the anges downwardly. The center or web portion of each of the U beam sections 40 has formed therethrough a number of apertures 4 I.

The float 35 at each end of the scow, is adapted to rposition between the pair of U beams y40 and it has secured to each of the sides which is adjacent toa beam 40, the two outwardly projecting ears 42, each of which is provided with an aperture adapted to receive the securing bolt `3S and to aline with an aperture 4I into which the securing bolt is extended. Thus adjustment of the float transversely of the scow may be readily made so as to position the floats 35 in the proper position so as to effect the return of the scow to upright position vafter the dumping operation. After proper adjustment of the floats is obtained, the bolt 36 may be permanently secured in place.

From the foregoing it will be readily apparent that a scow constructed in accordance with the present invention is capable of carrying a greater load than dumping scows of those types where the load is maintained on the top deck. At the same time by the provision of the wall extension panel I8', the load itself assists in capsizing and dumping the scow and when the boat rights itself this extension panel carries water back into the load space which washes out the same.

I claim:

l. A self-dumping scow having a hull including a bottom, and end and side walls, a top deck and an inner deck spaced from the bottom and forming therewith a closed oat chamber, the top deck having a well hole therein, walls extending down from theedges of the well hole to the inner deck and forming a load space below the top deck, a part of the inner deck forming the load deck of the loading space, means for nooding the inner deck outside of the load space above the level of said load deck and at one side of the scow to effect the capsizing of the scow, and float chambers carried upon the top deck.

2. A self-dumping scow of the character stated in claim 1, with one of said Walls at one side of the scow extending a substantial distance upwardly at an inclination outwardly above the top deck whereby a load will slide thereover in the capsizing action to assist in such action.

3. A self-dumping scow having a hull including a bottom, side walls and end walls, a top deck and an inner deck spaced from the bottom and forming therewith a closed float chamber, the top deck having a well hole therein, Walls extending down from the edges of the well hole to the inner deck and forming a load space below the top deck,

a oat carried upon the top deck at each end of the scow, means for llooding the inner deck at one side of the scow and outside the load space when the scow is loaded, and means for holding back the flow of the flood water introduced onto the inner deck, to the opposite side of the scow until the major part of the said one side is flooded.

4. A self-dumping scow of the character stated in claim 3, in which the said means for holding back the flow of ficod water to the other side of the scow, comprises a relatively low partition panel extending from each end wall to the adjacent wall of the load space and upon the inner deck.

5. A self-dumping scow of the character stated in claim 3, with that side wall of the load space nearest to the said means for flooding the inner deck, extended a substantial distance at an inclination upwardly and outwardly above the top deck.

6. A self-dumping scow having a hul1 including f,

a bottom, end walls and side walls, a top deck and an inner deck above and spaced from the bottom and forming therewith a closed float chamber, the top deck having a well hole therein, walls extending down from the edges of the well holes to the inner deck and forming a load space Ibelow the top deck, said inner deck adjacent to one side wall having a well depression therein, an opening formed through the said one side wall adjacent to said well depression, a ood pipe having one end laterally turned and pivotally engaged in said opening, the pipe being disposed in the space between the said one side wall and the adjacent load space wall and adapted to swing from an upright position downwardly into the Well depression, iloats carried upon the top deck, a vertical partition Wall upon the inner deck between each end wall of the hull and the adjacent wall of the load space, said partition wall being of materially less height than the adjacent load space wall, scuppers leading from within the load space to the outside of the hull, and means for effecting the raising and the dropping of the ood pipes with respect to the well depression.

'7. A self dumping scow of the character stated in claim 6, wherein the load space wall adjacent to the ilood pipe is extended upwardly and outwardly a substantial distance above the top deck.

JOHN' K. MUNSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 266,212 Sickles Oct. 17, 1882 1,306,322 Waters June 10, 1919 1,675,607 Henry July 3, 1928 2,003,694 Munson June 4, 1935