US2435670A - Closure for hoppers and the like - Google Patents

Description

Feb. 10, 1948. ,'M BUEHLER 2,435,670

CLOSURE FOR HOPPERS'AND THE LIKE Filed May 5, 1945 lrraelvfxs Patented Feb. 10, 1948 TAT-ES PATENT OFFICE QL QQKEF- l. HOPPEES D ilH JKE Allan Moyer Buehler, Preston, Ontario, Canada, as'signo'r to Eastern Steel "Products Limited, Rreston, Qntarig,' Canada, -acompany of flanaoa e elieatignll er 4 1945, 1.5%?! N 5%??5 times detracts from the entirely smoothopera:

tion'oi the cover.

Ifhe'se disadvantages are avoided by the pres,- ent invention.

It -is therefore an object of the present imam: t t-ion to provide a hopper cover of :the swinging type which is simple in construction and which will be Water-tight whenclosed.

A further object of the invention is to prpyige a structure of this kind whereby the cover,

swungto open position, will avoid any h kh slots between the cover and-the hopper ng in which the cover will in effect rm a ilfi al assist :in the introduction Lo f; material to the- 1549p,- vper.

A further object of the i ve tignis to ptovigle a structure of this. kind which may "be? 913 P- and los d end ma 1;

flahe -teeve il l ah ihew iheeh 1. .7 .me tih deei 9 he uide the me vilet rigie vof thecover treeloilthe upper (lee. ofj'the hop r he: ele -etiohe the heeh w th ehe eteheehihigure 2 i a. siev e e ahieh .Q the .hemeer vw th t hetee ehehehi fi lhfi firi t e ehe heiheleeeheh :eeh th eueh the hopper with the cover 016 4 Glaims. (Cl. 220-34) if ehre i i e s m lar V w to Figure 3 h e peer eh'eh euj eh Jean ehleeeed he elevation e .to ti h r hehqmal r- L'E 'e fi es s d ie evetieh e e cover shewhe un. ,zhei hhh ihe eerr edthereb ure-Z he hlhh v ew e the eever l s t Fi r .8 is, eh...eh e eeele ,e ev e e of thehihee bee. 1 he aihe Why in dotted s rel'at e positions f f thelhinge pins in various posit Je the ce've n e e'eel e' e e position- R i vin to th ,relwihee A zihd e e the p-- leer as ,e whq e'wh ihe l e 'a b s heer L h s eeYer ,i$,- to t e m h m and rear flhhe ehd 1, an si e eh Pll to th f t; het th beeper illustrated is d t e e -lie be hi es h en'ihe e h flange 1,3. is l kewise inclined as illustrated termcumny iii'riguresmna 4. It is obvious, of

co irse, from this iil'lat when the cover is closed the "the e hemie l .li 'f em ei Sealed end ehi' eli e t e er ha i ills'lll qn' e er w heeh cl t thes eyer withoht boss of it ense s r be rehueehheethe he movement 1 th eeven .1 pre,..' .h. l d.h l ih therefor in the form ofhra etsj I 5 winch are steppe as illlustrateginjfigp '5, inquiri g amounting plate r fi ee efhe teh lihe ehes tie th si e of h e her a e 9ol mqllht l 'e'e heh Offset m h ihehh ih nee eh leh eed from e 1 25 vt l e c el esl eeeh tethe m i e fleheee Mlqfth covert The xnountingsection of the brackets IS inclgcles a straight {inclined slofila and a curved,

fiamelikesloF-ISdispOsed' above the slot [8 and having two oonnecting sect-ions 20 and 2| forming aico ntinuous pathpf travel forthe pin of the ee'v r vree yehl t e n.

"The cover is provided with the spaced apart parallel mounting pins'2-2 and-23 which are prefheme carried oh' 'a' braket il which is riveted or otherwise secured on each end of the ,cover tothe'flanggs 1 H." Thelpinsi? and 23 are designed-to enter respectively the slots l8 and i ls that; in the'noi'inal closed position of the cov 'pihs 22 are disposed at the rearward end of the slot l8 and pihs'zti are disposed'in the lower ekti e nit'y of the section 20 qt -slot. l9.

As will be noted; the brackets 15 project -upwarc lly at aninclineto-the rear wall of the hopper and the rear edges of these brackets are disposeo beyond the reariace of the hopper so thatthe piri-2 2 is located behind the-rear "wall of the hopper'at-a distance at least as great as the depth of the rear flange-below the top of the cover when it is in aclosed position. Similarly, the brackets 24 carrying-the- pins 22 and 23 are lgl i s po'sed partially to projectfi'earwardly oi? the hinged constructions. open, acts as a convenient guide to some of the .material as it is being discharged into the hopcover. Thus, when the cover is swung upwardly from closed position, it will first ofall pivot on the pins 22, while the pins 23 swing freely through the section 20 of slot l9. However, when the pins 23 reach the point of juncture of the sections 20' and 2! of slot I9 and engage the cam-like edge 25 thereof, this will cause the pins 22 to move forwardly in the inclined slots 18. However, as this operation is occurring, namely, movement of the pins 23 to the point of juncture of the sections 20 and 2| of slot IS, the rearward flange i3 of the cover has been passed substantially to the level of the rearward wall of the hopper. Consequently, as the pins 22 move forwardly in the inclined slot l8 and the pins 23 then move downwardly in section 2| of the slot l9, the flange l3 of the cover will be moved forwardly to overlap the upper edge of the rear wall of the hopper, so that the cover is finally disposed at a rearward incline, to the rearward wall of the hopper and the plane of the upper end of the hopper, and

- will be supported in this position. Consequently,

the flange i3 overlapping the upper edge of the rear wall of the hopper in effect forms a cover plate for the upper edge of this wall and provides a guide to direct material to the hopper, when the latter is being filled, if such material happens to be directed against the inner face of the cover. As a result, therefore, no slot or opening is formed, between the cover and the rear wall of the hopper, when the cover is open, and thus there can be no loss of material as generally occurs through the slot or opening which usually is formed there in the case of a normally hinged cover.

I prefer to place the cover under spring pressure as this contributes to a particularly smooth operation of the cover from its closed to open position and vice versa. One manner in which this spring pressure may be applied is by providing the pressure applying rods 26 at each end of the hopper, the rod being formed with an eyelet or the like 21 designed to loopover the pins 22. The other end of the rod passing through an orificed bracket 28 fastened on each end of the hopper is designed to be-engaged by a coil spring 29 which exerts pressure between the bracket 28 and a stop member such as a washer rigidly fastened on the rods'26. Consequently, when the cover is closed, pressure is applied through the rods 26 against the pins 22 which, on the one hand, extends to hold the cover closed and, on the other hand, provides a pressure on pins 22 such as to assure a smooth operation as the cover is swung from the closed to open position and vice versa. In swinging the cover to open position, the rods 26 tend to assure that the pins 22 remain at the upper end of the slot i8 until the pins 23 engage the cam-like edge 25 of the slot I9, at which point the pins 22 are then caused to move forwardly in the inclined slots l8 and the rods 26 slide in the bracket 28 compressing the coil spring 23 as shown in Figure 2.

It will be apparent thatthis cover construction will operate efficiently and will seal the hop- -per completely, when closed, preventing the en- .trance'of water or the like to the hopper, whereas, when open, the rear flange completely overlaps the upper edge of the rear wall of the hopper to avoid any formation of an opening along this upper edge which usually occurs in normally Thus, the cover, when per, while avoiding loss of some of the materia which occurs in ordinary hinged constructions. What I claim as my inventionis:

1. In a closure'means for hoppers and the like, a cover member having front and rear flanges designed to overhang the upper edges of the hopper, brackets rigidly mounted on opposed sides of said cover and designed to project beyond said rear flange, a pair of spaced apart pins projecting laterally outwardly from the sides of the projecting portions of each of said brackets, guide bracket members rigidly mounted on opposed sides of said hopper, each having a pair of spaced apart guide means therein designed cooperatively to engage said pins on said cover, said pins moving in said guide means upon lifting of said cover,'one of said guide means extending generally forward from a point located behind said rear wall at a distance at least as great as the depth of said rear flange below the top of said closed cover, the other of said guide means having a section concentric with said rearmost point of said first mentioned guide means and a section extending toward said first mentioned guide means, said guide means engaging said pins such that when said cover is raised from a closed position one of said pins will pivot in the rearmost portion of said first mentioned guide means while the other pin is guided around said concentric section of said second mentioned guide means to cause said rear flange to swing to a height above the back edge of said hopper, said second mentioned pin being designed to enter the non-concentric section of said second mentioned guide means when said back flange is raised above said back edge a predetermined amount to cause each of said pins to move generally forward in their respective guide means simultaneously to position said rear flange over the upper edge of said rear wall when said cover is fully open.

2. In a closure means for hoppers and the like, a cover member having front and rear flanges designed to overhang the upper edges of thehopper, brackets rigidly mounted on opposed sides of said cover and designed to project beyond said rear flange, a pair of spaced apart pins projecting laterally outwardly from the sides of the projecting portions of each of said brackets, guide bracket members rigidly mounted on opposed sides of said hopper, a pair of slots in each of said guide brackets designed cooperatively to receive said pins, one slot being positioned above the other, the lower slot extending forwardly and downwardly from a point located behind said rear Wall at a distance at least as great as the depth of said rear flange below the top of said cover when closed, the upper slot having a section concentric with said rearmost point in said lower slot and a section inclined towards said lower slot extending toward said lower slot, said guide bracket members engaging said pins such that when said cover is raised from a closed position one of said pinswill pivot in the rearmost portion ,of said lower slot while the other pin is guided 3. In a closure for hoppers as claimed in claim 2, the inclusion of a spring means designed to bear REFERENCES CITED against the pin in said lower Slot to urge it The following references are of record in the wards the rear portion of said slot for the purfile of this patent: pose of efiecting a smoother cover operation. 5 UNITED STATES PATENTS 4. In a closure for hoppers as claimed 1n claim 2, the inclusion of a rod connected at one end to Number Name Date the pin disposed in said lower slot, a bracket 620,572 Dletz 1899 member on the hopper slidably receiving the Carter June 1906 opposite end of said rod and spring means act- 10 1,101,521 'f June 1914 ing on said rod to exert a pressure against said 2,053,796 Kelth et Sept- 1936 pin.

ALLAN MOYER BUEHLER.

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