US2010054A

US2010054A - Hoisting apparatus

Info

Publication number: US2010054A
Application number: US645676A
Authority: US
Inventors: Frank G Brotz; Mallman Adolph
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-12-05
Filing date: 1932-12-05
Publication date: 1935-08-06
Anticipated expiration: 1952-08-06

Description

ug- 5, 1935- F. G. BRoTz ET AL HOISTING APPARATUS Filed Deo. 5; 1932 2 Sheets-Shea?, -l

' Ciwy@ Aug. 6, 1935. F. G. BRO-rz ET AL 2,010,054

Filed Deo. 5, 1952 ATroRNEY l Patented Aug. 6, 1935 A UNITED ASTATES,

PATE

HOISTING APPARATUS Frank G. Brotz and Kohle Adolph Mailman, Wis.

Application December 5, 1932, Serial No. 645,676

13 Claims.

Our invention relates to improvements in hoisting apparatus, more particularly to hoisting apparatus of a type adapted to be used in connection with a crane, winch or the like for hoisting articles in the loading and unloading of boats and similar uses. I

An object of our invention is to provide a hoisting apparatus which will obviate the necessity of placing parts thereof under the load to be lifted, as is customary in the use of slings and the like, and which may be readily and quickly attached or detached from the articles to be lifted.

It is a further object of our invention to provide a hoisting apparatus which is particularly adapted to the rapid and eilicient hoisting of boxed or crated articles. I

We attain these objects by the use of the mechanism illustrated in the accompanying drawings, in which Fig. 1 is a side elevation showing the hoisting apparatus attached to a traveling crane; Fig. 2, a plan view of the hoisting apparatus; and Fig. 3, a perspective view showing the method of attachment to a box or crate. p

Similar numerals refer to similar parts throughout the several views.

In the drawings, the numeral I refers to a rigid frame of pipe, angle iron or other suitable material. In the illustration the frame I is suspended, by chains or other flexible ,supporting means 2 terminating in the ring 3, .from the cable 4 of the crane 5. A pluralityof pipe bends 6 are attached to the frame I at suitably spaced intervals. Chains or other flexible connecting means 1 are passed through the pipe bendsas shown in Fig. 3.

It will be understood that the object of this construction is to slidably mount the chains 'I upon the frame I in such manner as to be extensible downwardly and retractable upwardly, and that many other means such as, for example, a pulley, or an eye may be used as equivalents of the pipe bends 6. The chains 1 are provided with keystone rings 8 which provide a method of attaching or detaching a clamping device. The clamping device referred to consists of the ring 9,

a pair of chains I connected thereto, a pair of pointed hooks II attached to the chains I0, and a coil spring I2. The function of the chains I0 being to support the hooks II in such manner that the lifting force upon the ring tends to pull them inwardly and toward each other, it is apparent that many equivalent means may be used such as other flexible connections or rods atposition and not interfering the crate and the tached to the ring by eyes, etc. A counterweight I3 is attached to the opposite extremity of the chain 1. `The chain 'l is also `provided with the stop I4 which is larger than the bore of the pipe bend 6 and prevents the counterweight I3 from pulling the chain 'I entirely therethrough.

The operation of the device is as follows: the hoisting apparatus is attached to the crane, as shown in Figure 1, and lowered to the articles to be hoisted. The chains 'l with the attached clamping devices arel normally `held in the retracted position, shown by the full lines in Fig. 3, by the counterweight I3.L Thus itis possible to use all or only a part of the clamping devices, those `not being used remaining in a retracted with the use of the others.

The operator grasps such of the clamping-devices as are to be used and draws them down to extended position shown by the dot and dash lines of Fig. 3. The counterweight I3\ acts as a The hooks II are then spread apart Aso as to embrace the box, crate or article I to be hoisted. Boxes `and crates are customarily made with `an end strip of material thicker than hooks I I are placed so .as to engage the under side of this end strip, thus securing a firm hold. The spring I2 holds the hooks Il in engagement with the box or crate I5. As

a i'lrm hold'thereon. Thus, even though the box or crate is not formed with a relatively thicker end strip as aforesaid, the clamping device will hold it securely. The clamping device is readily detached from the crate by spreading the hooks II and allowing the counterweight `I3 to return the clamping device to the retracted position.

Thus the danger of the operator being injured by the hooks of the clamping devices not in use is obviated, as is also 'the difficulty which would otherwise be caused by tangling of the hooks upon lowering of the device. A tag line I 6 attached to the chains I1 may be used to steady and guide the apparatus during the raising and lowering thereof.

It will thus be seen that the invention provides a means for hoisting crated or boxed articles, which obviates the necessity of lifting the crates or boxes to place supporting bars or platforms under them and which may be readily and quick` the balance of NTLoFFlCE 1y attached or detached therefrom. The invention is further adaptable to hoisting a number of boxes or crates at one lift of the crane.

We claim:

1. A hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of clamping devices extensibly attached thereto, and means operating automatically upon the release of the load from said clamping devices for holding said clamping devices in a retracted position when not in use.

2. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, and one or more clamping devices supported by said frame, said clamping devices comprising a fiexible connector slidably attached to said frame, a counterweight of greater weight than said clamping device attached to one extremity of said connector whereby said clamping device is normally held in a retracted position, and clamping means attached to the opposite extremity of said connector.

3. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of pipe bends attached to said frame, and a plurality of flexible connectors passed through said pipe bends, said exi'ble connectors being provided at one extremity with clamping means and at the opposite extremity with counterweights.

4;. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of pipe bends attached to said frame, and a plurality of flexible connectors passed through said pipe bends, said exible connectors being provided at one extremity with clamping means and at the opposite extremity with counterweights, said counterweights being of greater diameter than the bore of said pipe bends whereby to prevent said flexible connector from being withdrawn from said pipe bend by a load on said clamping means.

5. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of pipe bends attached to said frame, and a plurality of flexible connectors passed through said pipe bends, said flexible connectors being provided at one extremity with clamping means and at the opposite extremity with counterweights, said counterweights being of greater diameter than the bore of said pipe bends whereby to prevent said exible connector from being withdrawn from said pipe bend by a load on said clamping means, and a stop on said exible connector adjacent said clamping means whereby to prevent said flexible connector from being with-- drawn from said pipe bend by said counterweight.

6. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of clamping devices extensibly and retractibly attached to said frame, and means for causing the retraction of any of said clamping devices when no load is attached thereto.

7. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of clamping devices adapted for attachment to individual loads, means for individually attaching said clamping devices to said frame so as to be manually extensible therefrom, and means incorporated in said attaching means for causing the retraction of any of said clamping devices when no load is attached thereto.

8. In a hoisting device, the combination of a frame, a plurality of clamping devices attached to said frame, said clamping devices being held extended from said frame by a load held thereby and means for causing the retraction of said clamping devices when no load is held thereby.

9. In a hoisting apparatus, the combination of a frame, a plurality of clamping devices comprising a ring, a plurality of hooks and flexible means for attaching said hooks to said ring, means for extensibly attaching said clamping devices to said frame, and means for causing the retraction of any of said clamping devices when no load is supported thereby.

10, In a hoisting apparatus, the combination of a frame, a plurality of devices for clamping and supportinga load, a like number of flexible connecting means, each of said exible connecting means having attachment to one of said clamping devices and slidable attachment tosaid frame whereby said clamping devices may be extended from and retracted toward said frame, and means connected to said flexible connecting means for causing the retraction of any oi' said clamping devices when no load is supported thereby.

ll. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, and one or more clamping devices supported by said frame; said clamping devices comprising a flexible connector slidably attached to said frame, a counterweight attached to one extremity of said connector, a ring attached to the bottom extremity of said connector, and a pair of clamping hooks flexibly attached to said ring whereby when the hooks are in clamping position, the lifting of said ring causes said hooks to tend to be drawn inwardly toward each other.

l2. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of clamping devices adapted to clamp a load supported by said frame and individually extensible therefrom and retractible thereto, and means for causing the retraction of any of said clamping devices where no load is supported thereby,

13. Hoisting apparatus comprising a hoisting device, a frame suspended therefrom, a plurality of clamping devices adapted to clamp a load supported by said frame and individually extensible therefrom and retractible thereto, and means comprising a coimterweight attached to each of said clamping devices for causing the retraction of any of said clamping devices where no load is supported thereby.

FRANK G. BROTZ. ADOLPH MALLMAN.