US2102163A

US2102163A - Collapsible hoisting frame

Info

Publication number: US2102163A
Application number: US126342A
Authority: US
Inventors: Henry A Pasternack
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-02-18
Filing date: 1937-02-18
Publication date: 1937-12-14
Anticipated expiration: 1954-12-14

Description

Patented Dec. 14, 1937 UNITED STATES PATENTO'FFICE Henry A.

mast, Broo'iflyii, N. Y, assignor to David nettw, New York, 'N. Y. Application February is, 1937;, Serial No. 126,342 '4 claims. (crystal-'67) V This invention relates to iinprovementsin hoisting frames, being particularly'directed to a collapsible unit formed of internesting elements in association with a handle serving, upon assembly of the. elements, to lock the same in rigid and firm operative position.

Broadly, it is an object of this invention to provide a hoisting frame incorporating a plurality of internesting elements capable of angular displacement with respect to one another to form a grill or cage, and adapted to be locked in assembled position by the medium for supporting the same.

Specifically, it is an object of this invention to provide a hoisting frame incorporating a plurality of support elements, each in the form of a continuous loop and capable of internesting to form a knock-down assembly in substantially a single plane, the respective elements being pivotally mounted with respect to one another, so that, upon angular displacement about a body or package, an enclosing cage therefor may be provided, the handle for the frame being so formed and actuated as to lock the respective elements to provide a rigiddevice as assembled.

These and other advantages, capabilities and features of the invention will appear from the subjoined detailed description of one specific embodiment thereof illustrated in the accompanying drawing, in which Figure 1 is a perspective view showing my hoisting frame as assembled.

Figure 2 is a front elevation showing my hoisting frame as collapsed.

Figure 3 is a perspective view of the locking handle.

Figure 4 is an end elevation in section taken along lines 4-4 of Figure 2.

Referring to the reference characters in the drawing, my hoisting frame comprises a plurality of elements A and B, each provided in the form of a substantially rectangular continuous loop and having respectively faces Hi to l3 inclusive and I4 to- I? inclusive, the ends of the bars forming the elements being interlocked as r at Hi; the element A is smaller in length and height than element B, so that it may nest within element B, as shown in Figure 2, when the device is in knock-down condition.

The respective elements A and B are interconnected by pivot members respectively at their heads and bases Ill-l2 and I l-l6, such pivots being formed, for the purpose of illustration, of rivets l9, applied as shown in sectional view of Figure 4.

A' locking handle 23 for the device comprises in thisillustration, of awire bentto form a triangle having legs 2| and 22 merging at apex 23, the portions of the wire 24 and 25 forming the base of the triangle, having their free ends extending to form arms 26 and 2'! disposed at right angle to the base and legs of the triangle,

, the extremities of the

arms

26 and 21 having

upstanding projections

28 and 29. V V shbwn in Figures 1 and 2, the handle 20 is assembled to encompass the respective heads and bases |0|4 and |2-||5 across their width; the handle being disposed so as to have the triangular legs thereof 2| and 22 adjacent the apex 23 rest against the surface of the head of element B when the device is in collapsed form, while the

arms

26 and 21 of the base are suspended below the undersurface of the head of element A.

When the device is assembled through the angu-V lar displacement of element A with respect to element B about the upper and lower pivot members 9, the handle may be drawn upwardly in the direction of the arrow in Figure 1, so that legs 2| and 22 rest within the apices 30 and 3| formed by the diametrically opposite heads of the elements, while the

projections

28 and 29 rest within the apices 32 and 33 formed by the diametrically opposite heads, the legs and projections above referred to being alternately disposed with respect to one another; thus forming a four-point locking medium to rigidly maintain the assembled frame and prevent the respective elements A and B thereof from being displaced.

In order to load the hoisting frame, the same istaken in the collapsed form (see Figure 2) and 7 material in the form of apackage or in a tub 34 is disposed on base I2 of element A; the element B is then displaced about pivots l9 at the heads and bases of the respective elements so that, upon angular displacement, in this instance, right angular displacement of the respective elements, a barred or grilled cage for the package is provided; the handle 20 is then drawn upwardly (see Figure 1) by application of hook 35 acting on apex 23 thereof, so that the respective legs 2| and 22 and

projections

28 and 29 enter into the apices between the respectiveportions of, the heads of the elements to lock the device.

To remove the package the hook 35 is with drawn from the apex of the handle, permitting the handle to drop by gravity, thus releasing the pressure of the legs 2| and 22 and

projections

28 and 29 against the portions of the heads of the respective elements at their apex formations;

placed about element A to cause collapsing and internesting of such elements.

It is obvious that various changes and modifications may be made to the details of construction without departing from the general spirit of the invention as set forth in the appended claims. 1

I claim:

1. In a hoisting frame, a plurality of support members capable of nesting one within the other, means for mounting said members to permit angular displacement thereof to form an enclosing cage, and means adapted to be positioned at the respective apices defined by the support members when disposed in angular relationship, for rigidly locking the supports and maintaining said enclosing cage formation.

2. In a hoisting frame, a plurality of support members capable of nesting one within the other, means for mounting said members to permit angular displacement thereof .to form an enclosing cage, and means adapted to be positioned at the respective apices defined by the support mem bers when disposed in angular relationship, for rigidly locking the supports and maintaining said enclosing cage formation, said last named means comprising a handle having formations at a plue rality of points normally out of contact with the 4 support members when the same are in nested form and adapted, upon being vertically displaced and maintained under tension, to rest in the aforesaid apices.

3. In a hoisting frame, a plurality of polygonal support members capable of nesting one within the other, means for pivotally mounting said members to permit angular displacement one with respect to the other to form an enclosing grill or cage, and means adapted to be disposed at the apices defined by a plurality of adjacent faces of the respective support members when disposed in angular relationship for rigidly maintaining said support in angular position.

4. In a hoisting frame, a plurality of polygonal support members capable of nesting one within the other, means forpivotally mounting said members to permit angular displacement one with respect to the other to form an enclosing grill or cage, and means adapted to be disposed at the apices defined by a plurality of adjacent faces of the respective support members when disposed in angular relationship for rigidly maintaining said supports in angular position, said last named means comprising a handle having formations at a plurality of points normally out of contact with the support members when the same are in nested form and adapted, upon being vertically displaced and maintained under tension, to rest in the aforesaid apices.

HENRY A. PASTERNACK.