US2604303A

US2604303A - Combined hoist and jack

Info

Publication number: US2604303A
Application number: US145235A
Authority: US
Inventors: Thomas L Grady
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-02-20
Filing date: 1950-02-20
Publication date: 1952-07-22
Anticipated expiration: 1969-07-22

Description

ly 1952 T. GRADY COMBINED HOIST AND JACK 2 SHEETSSHEET 1 Filed Feb. 20, 1950 Fig. 4

Fig.

I \I A l llgggvllwzllv Thomas L. Grady INVENTOR.

July 22, 1952 T. GRADY COMBINEDHHOIST AND JACK 2 SHEETS.SHEET 2 Filed Feb. 20, 1950 Fig. 3

INVENTOR.

I Thomas L, Grady (Wavy M L Patented July 22, 1 952 UNITED-STATES PATENT OFFICE COMBINED HOIST AND JACK Thomas L. Grady, Ashley, Pa.

Application'February 20, 1950, Serial No. 145,235

3 Claims. 1

This invention relates to new and useful improvements and structural refinements in hoisting and jacking equipment, and the principal object of the invention is to facilitate convenient and expeditious handling of bracing timber, props, legs, collars, etc., such as are used in tunnels, mine shafts, or the like.

In particular, the invention concerns itself with the provision of what may be referred to as a combined hoist and jack, the invention being so arranged that it automatically braces itself against the fioor and ceiling or roof of the tunnel for dependable jacking or hoisting purposes, without'requiring the preparation of a secure base or footing thereunder.

Some of the advantages of the invention reside in its simplicity of construction, in its efficient, safe and dependable operation, in its sturdiness, and in its adaptability to economical manufacture. With the above more important objects and features in view and such other objects and features as may become'apparent as this specification proceeds, the invention consists essentially in the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a side elevational view of the invention in use;

Figure 2 is a vertical sectional view thereof;

' Figure 3 is a horizontal sectional view, taken substantially in the plane of the line 3--3 in Figure 1;

Figure 4 is a side elevational view of the inner standard section and head;

Figure 5 is atop plan view of the intermediate standard section; and

Figure 6 is a transverse sectional view, taken substantially in the plane of the line 6-6 in Figure 5, but illustrating the inner standard section within the intermediate section.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the invention consists of a combined hoist and jack which is designated generally by the reference character I0 and embodies in its construction a vertically extensible standard I2 consisting of a tubular outer section I4, a tubular intermediate section I6 and a tubular inner section I8.

These several sections are slidably telescoped together in spaced relation, there being provided an annular spacer which is secured, as at 22,

to the lower end of the intermediate section I8 and slidably engages the inner surface of the outer section I4, while a similar spacer 24 is secured, as at 26, to the lower end of the inner section I8 and slidably engages'the inner surface of the intermediate section I6.

Similarly, an annular spacer 28 is secured, as at 30, in the upper end of the outer section I4 and slidably engages the outer surface of the intermediate section I6, while a plurality of spaced

segments

32, 34, 36 are secured in spaced relation in the upper end of the intermediate section I5 and slidably engage the outer surface of the inner section I8, the arrangement of the segments being best illustrated in the accompanying Figure 5 and being hereinafter more fully described.

A flanged base 38 is secured, as at 49, to the lower end of the outer section I4 and is provided with an anchoring element in the form of an eye piece 42.

The upper end portion of the inner section I8 is provided with a pair of diametrically opposite, longitudinally extending slots 44 which accommodate a transverse fulcrum pin 46 carrying a head 48, the latter being recessed, as at 58, so as to movably receive the upper end portion of the inner section I8, by which arrangement the head 48 is free to adjust itself, both longitudinally and transversely, to a given, approximately horizontal plane, while the standard I2 remains vertical.

It may be explained at this point that the base 38 of the standard is intended to rest upon the floor or bottom of a mine, while the head 48 abuts the roof or ceiling-of a mine, to which end the head may be provided with upwardly projecting, pointed prongs 52 so as to prevent slipping.

Suitable handles 54 may be provided at the upper and lower ends of the standard section I4 so that the entire device may be conveniently carried, it being understood that the invention is preferably constructed from light material, such as aluminum, or the like, so that it is readily portable.

The space between the

spacer segments

32, 34 in the upper end of the standard section means defines a channel for the slidable" reception of a key 55 which is secured longitudinally to the inner section I8 and is slidablein the space or channel 58 between the

segments

82, 34, whereby relative rotation of the standard sections it, I8 is prevented. Moreover, the spaces between the

segments

32, 34 and the segment 35 define a pair of channels 68 (see Figure 5), so that a cable 62 may pass through the space between the inner section I8 and the intermediate section IE to a pulley 64 which is rotatably mounted in the lower end portion of the section I8, as will be presently explained.

The pulley 64 is rotatable on a transverse shaft 66 with which the lower end portion of the inner section I8 is provided, it being noted that the lower end portion of the section It is also formed with a pair of vertically elongated, diametrically opposed recesses 68 to accommodate peripheral portions of the pulley 64, whereby the cable 62 may pass around the pulley 64 without coming in contact with the standard sections I6, I8, as is best shown in Figure 2.

The two upward stretches of the cable 62 from the pulley 64 pass around a pair of additional pulleys 19, I2 which are rotatably mounted on suitable stud shafts M, 7-6, respectively, on a bracket I8 which is aflixed to the upper end portion of the standard section I6.

The stretch of the cable 62 passing over the pulley II! is windable upon a winch 8E, sup ported by a bracket 82 on the standard section I4 and equipped with a conventional ratchet mechanism 84 and with a removable, actuating crank 86.

The stretch of the cable 62 which passes over the pulley I2 has its free end provided with a fastening element in the form of a hook 83 which may either be anchored to the eye piece 42 on the base 38 as shown by the dotted line e6 in Figure l, or which may be fastened to the cable after the latter is wrapped around a log 92 which is to be hoisted, as shown by the full lines in the same figure.

In any event, it is to be noted that the stretch of the cable 62 passing over the pulley 72 also passes over an additional pulley 94 which is rotatably mounted on a pin 96 on an upwardly offset extension 98 of the bracket i8, as is best illustrated in Figures 1 and 2.

The standard section I6 may be locked against downward sliding movement in the standard section I4 by a transversely extending locking pin I60 which is anchored by a suitable flexible fastening element I02 to the section I4 and is receivable selectively in rows of vertically spaced apertures I04 with which the standard section I is provided.

Finally, it is to be noted that the upward sliding movement of the inner section I8 in the intermediate section I6 is limited by a pair of inwardly projecting screws or pins I06 which are provided in the section I6 for abutment by the spacer 24 on the section I8, as illustrated in Figure 6.

When the invention is placed in use, the standard section I6 is adjusted vertically relative to the standard section I4 so as to provide an overall height to suit the height of the roof or ceiling of the tunnel above the floor, and by winding the free end portion of the cable 62 around a piece of bracing timber 92 and thereafter actuating the winch 80 by the crank handle 36 so as to wind the cable 62 on the winch, the timber 92, being heavier than the standard section I8, will result in the standard section I8 being slid upwardly until the prongs 52 on the head 50 embed themselves into the roof or ceiling of the tunnel. In this manner, the device will be rigidly sustained in an erect position, and continued winding of the winch 80 will then cause the load 92 to be hoisted in readiness for subsequent installation.

On the other hand, when there is no load to be hoisted, and it is merely desired to use the device as a jack, the fastening hook 88 of the cable 62 may be anchored to the eye piece 42, so that as soon as the winch 80 is actuated to wind the cable 62 thereon, the inner section I8 of the standard will be slid upwardly to effect the jacking operation.

Needless to say, by virtue of the adjustability of the intermediate section I6 in the outer section I4, the span or range of vertical expansion or extension of the entire standard is substantially increased, so that the invention may effectively be used under various different working conditions.

It is believed that the advantages and use of the invention will be clearly understood from the foregoing disclosure, and accordingly, further description thereof at this point is deemed unnecessary.

Having described the claimed as new is:

1. In a combined hoist and jack, a vertically extensible standard comprising an outer section provided at its lower end with a base to engage a floor, an intermediate section slidably telescoped in said outer section, means for locking the intermediate section in a predetermined position against downward sliding in the outer section, an inner section slidably telescoped in the intermediate section and provided at its upper end with a head to abut a ceiling, a winch mounted on said outer section and having a cable prov ded at its free end with a fastening element, a pair of upper pulleys provided at the upper end of the intermediate section, and a lower pulley provided at the lower end of the inner section, said cable passing around said pulleys, whereby said standard may be extended when said element is fastened to said base and whereby said element may be hoisted when the inner and intermediate sections are relatively stationary.

2. The device as defined in claim 1 wherein said inner section is spaced from said intermeinvention, what is diate section and is provided in its lower endportion with a pair of diametrically opposite recesses to receive peripheral portions of said lower pulley, stretches of said cable extending from the upper pulleys to the lower pulley through the space between the intermediate and inner sections.

3. The device as defined in claim 1 together with means for preventing relative rotation of the intermediate and inner sections.

THOMAS L. GRADY.

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

UNITED STATES PATENTS