US2828041A

US2828041A - Front dump mine skip

Info

Publication number: US2828041A
Application number: US603283A
Authority: US
Inventors: Daniel C Leonard
Original assignee: Dorr Oliver Long Ltd
Current assignee: Dorr Oliver Long Ltd
Priority date: 1956-08-10
Filing date: 1956-08-10
Publication date: 1958-03-25
Anticipated expiration: 1975-03-25

Description

2 Sheets-Sheet 1' Inventor DAN/EL c. LEONARD D. c. LEONARD FRONT DUMP M'INE SKIP FIG. 2

March 25, 1958 Filed Aug; 10,1956

FIG l March 1958 I D. c. LEONARD 2,828,041

FRONT DUMP MINE SKIP Filed Aug. 0, 195 2 Sheets-Sheet2 FIG; 3

FIG. 5

FIG. 6

lnvz-ntor DAN/EL C. LEONARD FRDNT DUMP MINE SKIP Daniel C. Leonard, (lriilia, Ontario, Canada, assignor to Dorr-flliver-Long Limited, a company of Canada Appiication August 10, 1956, Serial No. 603,283-

4 Claims. (Cl. 214741) This invention relates to a skip for removing muck and the like from mines, of the type that are drawn up the mine shaft on guide runners mounted in the latter. More particularly, the invention relates to the dumping of the skip.

Many arrangements have been employed in the past for dumping skips. I feel, however, that the front dump arrangement that I have devised is a substantial improvement over those that have gone before from the point of View of reliability in operation, ruggedness of construction, and adaptability to the job to be done.

Generally speaking, my skip is a front dump skip, that is, the opening through which the load is released is one in a front wall of the skip. The opening is adjacent the bottom, and the bottom of the skip is sloped towards the opening to promote easy dumping. The advantage in my front dump arrangement over those of the prior art resides in the actual location of the opening with respect to the side walls and the means for first releasing the latch on the door for the opening, and subsequently applying power to open the door.

My invention will be clearly understood after reference to the following detailed specification read in conjunction with the drawings.

In the drawings:

Figure 1 is a side elevation of a skip according to my invention showing in dotted lines the position of the door in the open position.

Figure 2 is a front elevation of Figure 1.

Figure 3 is a sectional View along the line 3-3 of Figure 1.

Figure 4 is a sectional view along the line 4-4 of Figure 3.

Figure 5 is a view along the line 5--5 of Figure 1; and

Figure 6 is a fragmentary vertical section taken through the skip adjacent the bottom thereof to illustrate the liners employed in the skip construction.

The skip illustrated in the drawings is open at its top end, as skips usually are, and has vertical side walls which include a back wall 10, similar side walls 11, and a front wall 12. The bottom 13 slopes downwardly from the back wall 10 towards the front wall 12.

The discharge opening in the skip illustrated is formed in the front wall 12 adjacent the bottom 13, and is provided with a door 14 hinged about an axis at the upper end of the opening as at to open and close the opening.

The actual construction of the body of the skip has not been described in detail since the construction is capable of great variation, is well known in the art, and is not being claimed in this specification.

The bottom of skip 13 is formed with a liner 16, the lower end of which abuts with the door 14 when the door is in closed position, whereby the actual discharge opening for the skip slopes inwardly of the front wall 12 from its top towards its bottom. It should perhaps be also mentioned that side walls 11 each have a vertically extending liner that abuts with the door 14 when the door nited States Patent" 0 t ce is in a closed position. sloping opening which is defined by the edges of the side" wall and bottom liners that engage with the door 14 is indicated in Figure 6, which is a view of the opening with the door removed. The vertical liners just referred to are indicated by numeral 17. It will be noted that the lower portion of the bottom 13 of the skip is continued past the opening so that it, in effect, forms an apron inclining downwardly from the opening over which discharge from the skip will flow.

The door 14 comprises two

channel members

18 and 19, one arm of which is extended by means of

plates

20 and 21. The door panel is secured to the free end of plates 20 and El. by means of welding or some other suitable means. Plate Zti is deeper at its bottom than at its top to permit the door panel 14 to engage with the edges of liners l6 and 17 that define the inwardly sloping opening. It will be noted that the groove of the channels 18 and 1% cooperate with the outer side Walls 11 of the skip body.

The door 14 is normally locked in a closed position by means of the latch 22 that is carried thereby and that engages with a pin 23 on the body of the skip. Latch 22 is pivotally mounted to the channel member 1% as at 24 and has a roller 25 thereon which, in operation, engages with a track 26 to open it. This will be referred to in more detail later. The

channel members

18 and 19 also have a roller 27 that engages with the track 26 for the purpose of opening the door after the latch 22 has been released.

The operating track 26 which is designed in use for engagement by the

rollers

25 and 27, is curved to slope away from the normal course of skip travel, as indicated in Figure 1. It will be appreciated that there is a latch assembly and a roller 27 on each side of the door and that there are two tracks 26, one for each side of the door.

In operation, the track 26 is rigidly mounted as indicated in Figure 1 so that its lower straight end 28 is engaged by the

rollers

25 and 27 as the mine skip is pulled up the shaft. When roller 25 strikes the curved portion of the track as at 29, it causes the latch 22 to move in a clockwise direction about its pivot point 24 and to release the door. As the skip is raised further, the wheel or roller 27 engages with the sloped portion of the tracks and gives opening power for the door 14. The door in the fully open position is indicated by dotted lines of Figure 1.

It will be apparent that as the skip is dropped in the shaft after having been fully dumped, that the door will close as the roller 27 follows onto the straight portion 28 of the track 26. Subsequently, and due to a similar ac tion, the latch 22 will be closed on the pin 23.

What I claim as my invention is:

1. In a skip, a body having side walls including a front side wall and a back side wall, a bottom sloping downwardly from said back side wall towards said front side wall, said body having a discharge opening, a door for said opening hinged at its top to said front side wall, latching means for, said door to keep it closed, said latching means comprising a latch member pivotally mounted on said door, and a catch on said body for engagement by said latch.

2. In a skip, a body having side walls including a front side wall and a back side wall, a bottom sloping downwardly from said back side wall towards said front side wall, said body having a discharge opening, a door for said opening hinged at its top to said front side wall, latching means for said door to keep it closed, means for operating said latching means from a locked to an unlocked position and means for operating said door from an open to a closed position, said bottom sloping forwardly of said door when the latter is in a closed position to form A front view of the inwardly an apron over which muck will pass after the door is opened; said latching means comprising a latch member pivotally mounted on said door, and a catch on said door for engagement by said latch, and in which said means for operating said latching means comprises a catch track rigidly mountable ona mine shaft in which said skip is operated, catch track engaging. means carried by said latch for engaging said track, said means for operating said door. includes a door track, track engaging means carried by said door for engaging said door track after said track engaging means carried by said latch, said tracks being curved whereby said two track engaging means operate said latchto open it and then said door to open said door as said. skip is raised, and then to close said door and subsequently lock said latch as said skip. is lowered.

3. In a skip, a body having sidewalls including a front side wall and aback side wall, a bottom sloping downwardly from said back side wall towards said front side wall, said body having a discharge opening, a door for said opening hinged at its top to said front side wall, latching means for said door to keep it closed, means for operating said latching means from a locked to an unlocked position and means for operating said door from an open to a closed position, said bottom sloping forwardly'of said door when the latter is in a closed position to form an apron over which muck will pass after the door isopened; said latching means comprising a latch member pivotally mounted on said door, and a catch on atlases;

said door for engagement by said latch, and in which said means for operating said latching means comprises a track rigidly, mountable on a mine shaft in which said skip is operated, track engaging means carried by said latch for engaging said track, said means for operating said door includes a track, track engaging means carried by said door for engaging said track after said track engaging rneans carried by said latch, said tracks being curved whereby said two track engaging means operate said. latch to open. it and then said door to open said door as said skip is raised, and then to close said door and subsequently lock said latch as said skip is lowered.

4. In a skip, a body having'side walls including a front side Wall and a back side Wall, a bottom sloping downwardly from said back side wall towards said front side wall, said body having a discharge opening, a door for said opening hinged at its top to said front side wall, latching means for said door to keep it closed, means for operatingsaid latching means from a locked to an unlocked position and means-independent of said latching means.

References Cited in the file of this patent UNITED STATES PATENTS Lepley June3, 1924 2,424,620. Kern. July 29, 1947 2,479,449 Woodward et al Aug. 16, 1949 2,649,983 Finlay et al Aug. 25, 1953