US2490198A - Lift - Google Patents

Description

De@ 6, 1949 R. c. BOONE 2,490,198

LIFT Filed Oct. 14, 1947 2 Sheets-Sheet 1 E15 L E 1E E.;

i l m R. C. BOONE Dec. 6, 1949 LIFT 2 Sheets-Sheet 2 Filed Oct. 14, 1947 Patented Dec. 6, 1949 UNITED STATES APATENT OFFICE LIFT Raymond C. Boone, Grafton, N. Dak.

Application October 14, 1947, Serial No. 779,771

4 Claims.

This invention relates to a lift, and more particularly, to a lift for produce to be piled or stocked in a warehouse or the like.

A primary object of this invention is the provision of an automatic lift characterized by a continuously operated chain lift or the like, adapted vertically to reciprocate an elevator, and having means providing an automatic stop at the top and bottom of the device.

An additional object of the invention is the provision of such a device which is sturdy and durable in constructiton, reliable and efcient in operation, and relatively simple and inexpensive to manufacture, assemble and utilize.

Other objects will in part be obvious, and in part be pointed out as the description of the invention proceeds, and shown in the accompanying drawings, wherein there is disclosed a preferred embodiment of this inventive concept,

In the drawings:

Figure 1 is a side elevational view of one form of lift embodying features of the instant invention.

Figure 2 is a rear elevational view of the device shown in Figure l.

Figure 3 is a perspective of the elevator mechanism disassociated from the lift.

Figure 4 is a sectional view, partially broken away, taken substantially along the line d-li of Figure 2.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Referring now to the drawings in detail, the device of the instant invention comprises a base, generally indicated at Ill, which may be formed of channel iron or the like in the form of a rectangle, from which front uprights I I extend upwardly a desired distance. Uprights I I are braced by angularly inclined rear uprights I2 connected to uprights I I by transverse reinforcing members I3, and angularly inclined supplemental reinforcing members III. The upper extremity of the lift may include a plate I5, across which extends a transverse bar IB connected, as by cross-cables I'I, or the like, to a rear reinforcing member I8.

rlhe base III carries a suitable electric motor 2B, provided with a drive shaft `2I, upon which is mounted a sprocket 22, which drives, through a chain 23, a sprocket 24, mounted on a shaft 25, which extends transversely of the base adjacent the uprights II, and which carries spaced sprockets 26 adjacent opposite ends thereof, each f which drives a chain 2'I, which extends vertically adjacent front uprights II, the upper extremities of the chains being mounted on stub axles 39, carrying sprockets SI adjacent the top I5 of the device.

The chains Z'I have positioned thereacross and secured thereto a single transverse bar 35, adapted to engage and operate a lift member generally indicated at 35.

As best shown in Figure 3, lift member 3E includes right angled members 3l, to which are secured a vertical plate 38, an angle plate 39, and a horizontal lift-supporting plate dll. Secured across the top of the members 3l is a bar 4I, provided at its extremities with roller guides 42, while secured in the angle of members 3l is a second bar 53 also provided at its extremities with rollers M.

As best shown in Figure 1, the rollers Il@ are adapted to ride on the front surfaces of angle iron uprights II, while, as best shown in Figure 4, the rollers ll'l are adapted to engage the rear surfaces thereof. Extending rearwardly from the upper extremity of the member 35 are a pair of spaced bars 5, each provided at its extremity with a depending portion 4l, the bars 46 being adapted to be engaged by the transverse bar 35 as the same is moved upwardly, and/or downwardly, by the chains 2'I.

From the foregoing, the operation of the device should now be readily understandable. The motor 2li is energized, which occasions continuous rotation of chains 2l about sprockets 26 and 3|. As the bar 35 engages beneath the bars 46 carried by the lift structure 3B, it will be apparent that the device is elevated, traveling in the channels formed by the uprights II. When the device reaches the top, there is a perceptible pause during the passage of bar 35 over sprockets 3| sufcient to permit unloading of the device; and, conversely, when the bottoms of the angle members 3'I rest upon the base Ill, there is a further perceptible pause on the downward motion of the bar, while the bar continues to travel about the sprockets 26, and thence upwardly until such time as it re-engages the bars 46, whereupon the lift of elevator 3B is resumed.

From the foregoing it will now be seen that there is herein provided an improved automatic lift, which accomplishes all the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In an automatic lifting device, an upstanding frame, wheels mounted upon the upstanding frame near its top and bottom, an endless element passed about the wheels, a lift mounted upon the frame to travel longitudinally thereof `,near the endless element, a generally horizontal bar secured to the lift and projecting transversely across the endless element and having a length approximately equal to the diameter of the wheels, and an operating element mounted upon one run of the endless element and slidably engaging the lower face of the bar to travel longitudinally of the bar.

2. In an automatic lifting device, an upstanding frame, transverse pairs of wheels mounted upon the frame near its top and bottom, endless flexible elements passed about the wheels, a lift mounted upon the frame to travel longitudinally thereof near the endless elements, generally horizontal bars secured to the lift and projecting transversely across the endless elements and having a length approximately equal to the diameter of the wheels, a substantially horizontal rod mounted upon corresponding runs of the endless lelements and slidably engaging the lower face of the bars to travel longitudinally of the bars, and means connected with one pair of wheels to drive the same.

3. In an automatic lifting device, an upstanding frame, a substantially horizontal shaft mounted upon the lower portion of the frame, spaced wheels mounted upon the shaft, upper spaced wheels mounted upon the frame and having the space between them unobstructed, flexible endless elements engaging corresponding upper and lower wheels, a lift slidably mounted upon the frame to travel longitudinally thereof near the endless elements, generally horizontal bars secured to the upper portion of the lift and extending between and across the endless eley'ments and having a length at least as great as the diameter of the wheels, a substantially horlzontal rod mounted upon corresponding runs of -the flexible elements and slidably engaging the -lower faces of the bars to move longitudinally thereof, and means connected with the shaft to drive the same.

4. In an automatic lifting device, an upstanding frame including rails, a substantially horizontal shaft'V mounted upon the lower portion of the frame, spaced wheels mounted upon the shaft, upper spaced wheels, means connected with the vframe to mount the upper Wheels upon the frame and not projecting inwardly beyond such wheels for any considerable distance so that the space between such wheels is uninterrupted, flexible endlesselements engaging corresponding upper and lower wheels, a lift to travel longitudinally of the frame near the endless elements, wheels mounted upon the upper' portion of the lift and engagingV the inner faces of the rails, wheels mounted upon the lower portion of the lift and engaging the outer faces of the rails, generally horizontal. bars secured to the upper portion of the lift and projecting transversely between and across the endless elements and having a length at least as great as the diameters of the wheels which engage the endless elements, a substantially horizontal rod secured to corresponding runs of the endless elements and slidably engaging beneath the bars to move longitudinally thereof, and means connected With the shaft to drive it.

RAYMOND C. BOONE.

REFERENCES CITED The following referencesY are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,074,946 Stoner Mar. 23, 1937 2,241,798 Weiss May 13, 1941

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