US 2785840 A
Description (OCR text may contain errors)
March 19, 1957 Filed May 18, 1956 E. E. NAVE CONCRETE HOPPER AND GATE ASSEMBLY 3 Sheets-Sheet l la-l INVENTOR. i424 iomeo MW:
BYWQLgl/A/W March 19, 1957 E. E. NAVE CONCRETE HOPPER AND GATE ASSEMBLY 3 Sheets-Sheet 2 Filed May 18, 1956 INVEN TOR. 4124 Fawn/20 Nnv:
Armin/5K5 7 March 19, 1957 E. E. NAVE 2,785,840
CONCRETE HOPPER AND GATE ASSEMBLY Filed May 18,. 1956 3 Sheets-Sheet 3 1N VEN TOR.
424 faamea )V/WE W A @qLW United rates Patent "cc CONCRETE HOPPER AND GATE ASSEMBLY Earl Edward Nave, Alameda, Calif., assignor to Creative Metals Corporation, Emeryville, Califi, a corporation of California Application May 18, 1956, Serial No. 585,798
2 Claims. (Cl. 222ll3) This invention relates to and in general has for its object the provision of a concrete hopper and gate assembly.
More specifically, the object of this invention is the provision of an assembly of the character described comprising a hopper including a pair of opposed hopper side walls and a mouth; a pair of crossed arms pivoted intermediate their ends to each side wall and to each other; a gate plate secured to and between the lower ends of each pair of transversely opposed side walls and arranged to close upon each other immediately beneath the hopper mouth; spring means for biasing the upper ends of each pair of crossed arms towards each other; and lever actuated linkages connected to the upper ends of said arms for spreading the upper ends of said arms against said spring biasing means, thereby to retract said gate plates away from each other and thus open the mouth of said hopper.
The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description Where that form of the invention which has been selected for illustration in the drawings accompanying and forming a part of the present specification, is outlined in full. In said drawings, one form of the invention is shown, but it is to be understood that it is not limited to such form, since the invention as set forth in the claims may be embodied in other forms.
Referringto the drawings:
Fig. 1 is a side elevation of a hopper and gate assembly embodying the objects of my invention and showing the hopper gate in its closed position.
Fig. 2 is a view similar to that illustrated in Fig. 1, but showing the chute gate in its open position.
Fig. 3 is a back elevation of the assembly shown in Figs. 1 and 2..
The assembly as'illustrated in these various figures comprises a generally downwardly convergent hopper 1 provided withopposed, inclined side walls 2 and 3, inclined front and rear walls 4 and 5, a mouth 6 including front and rear walls 7 and 8 and side walls 9 and 11 terminating in arcuate'edges 12 and 13.
Weldedto and extending outwardly from the hopper side walls 2 and 3 above the hopper mouth 6 are transversely aligned bearing sleeves 14 and 15 reinforced by stiffening webs 16 Welded thereto and to the hopper side walls.
Within each collar 17 is an outwardly extending pin 18.
Pivoted intermediate their ends to each of the pins 18 is a pair of crossed arms 19 and 21, arnut 22 being threaded over the end of each of the pins 18 for holding the crossed arms in place. Bolted to and between each of the transversely opposed pair of arms 19 and 21 at Welded to and within each of the free ends of the sleeves 14 and 15 is a collar 17, and welded to and 2,785,840 Fatented Mar. 19, 1957 the lower arcuate flanged ends or edges thereof are arcuate gate plates 23 and 24 arranged when in edge to edge position, as shown in Fig. 1, to close the hopper mouth 6.
Welded to each of the hopper sides 2 and 3 substantially above the bearing sleeves 14 and 15 are axially aligned studs 25 and 26, the common axes of these studs being ofiset rearwardly relative to the common axes of the bearing sleeves 14 and 15. Threaded into each of the studs 25 and 26 is a stepped bolt 27, and pivoted on each of these bolts are the ends of the side arms 28 of a U-shaped gate operator or handle 29 extending forwardly of the hopper 1. Preferably, each of the arms 28 is formed forwardly of its pivoted end with a bend or break 31 in vertical alignment with its associated and underlying pin 18.
Pivoted to each of the arms 28 at their break or bend 31 by a bolt 32 is a pair of depending identical links 33, the lower end of each of said links being pivoted by bolts 34 to the upper end of one of the crossed arms 19 and 21. Secured to and between each contiguous pair of bolts 34 is a tension spring 35 serving to inwardly bias the lower ends of the crossed arms 19 and 21, and therefore to bias the arcuate gate plates 23 and 24 to their closed position as illustrated in Fig. 1.
To open the gate plates it is simply necessary to pull down on the U-shaped operator or handle 29 against the biasing action of the springs 35. Upon the release of the handle 29, the springs 35 will serve to automatically close the gates. Since the entire mechanism for operating the gates 23 and 24 is external to the hopper, it is isolated from the concrete passing through the hopper and therefore cannot become fouled thereby. Also, since there is a close clearance between the gates and the peripheral edges of the hopper mouth, these edges serve to wipe the gates free of concrete during such times as they are being opened.
1. A hopper and gate assembly comprising a hopper, including: a pair of opposed hopper side walls and a mouth; a pair of crossed arms pivoted intermediate their ends to each of said side walls and to each other; a gate plate secured to and between the lower ends of each pair of transversely opposed side arms and arranged to close upon each other immediately beneath the hopper mouth; spring means for biasing the upper ends of each pair of crossed arms. towards each other; and lever actuated linkages connected to the upper. ends of said arms for spreading the upper ends of said arms against said spring biasing means, thereby to retract said gate plates away from each other and thus open the mouth of said hopper.
2. A concrete chute and gate assembly comprising a chute including: opposed side walls and a mouth; a pair of crossed arms coaxially pivoted intermediate their ends to each of said opposed side walls and to each other scissor fashion; a gate plate secured to and between .each transversely opposed pair of arms at the lower ends thereof and arranged to close over said mouth; a link pivoted at its lower end to the upper end of each of said crossed arms, the two links of each contiguous pair of links being pivoted at'their upper ends to each other and to an operating lever intermediate the ends of said operating lever, and each of said levers being pivoted v No references cited.