US2148911A - Grabhook - Google Patents

Description

Pei 1.28, 1939. RC, MORGAN 2,148,911

GRABHOOK Filed June 26, 1937 Patented Feb. 28, 1939 GRABHOOK Recs 0. Morgan, Bethlehem, Pa., assignor to Bethlehem Steel Company, a corporation of Pennsylvania Application June 26, 1937, Serial No. 150,591

1 Claim.

This invention relates to grab hooks, and in particular to certain improvements therein whereby grab hooks may be manipulated, when desired, in open position.

contact said object whereupon hook I4 is released from engagement with pin 13, Hook I4 is then moved out of operative engagement with pin l3,

by shifting link 8 in a suitable manner.

After Grab hooks of the type contemplated by my inhook l4 has been moved out of engagement with 5 vention comprise in general a pair of oppositely pin l3, application of the aforesaid lifting means opposed jaws pivotally connected to each other; to link 8 will operate through chains 6 and I and each jaw having an arm extending beyond the arms 4 and 5 to close the jaws l and 2 and raise point of such pivotal connection in such a manthe object to be lifted. ner that the application of lifting means to the When the object being handled reaches its des- 10 outer ends of said arms operates to closethe tination, the lowering of the grab hook automatically releases the jaws. By lowering link 8 still further, hook I 4 is brought into operative engagement with pin l3 and the grab hook may then be raised with the jaws in open position ready to be placed over the next object to be lifted.

It will be seen that through the use of my invention it is possible for the operator of the grab hook to manipulate the ton-gs in either open or jaws about the object to be raised and thereafter to raise said object.

Because of the manner in which grab books of this type are constructed they tend, when empty, to assume a closed position and as a consequence it is necessary when adjusting them over and about an object to be raised, to use independent means for opening the jaws.

Various devices have heretofore been employed closed position without the necessity for manufor maintaining the jaws of grab hooks in open ally bringing said hook l4 and said pin I3 in and position, but such devices to the best of my knowlout of operative relationship. edge must be operated, or brought in and out It Will further be understood that the particuof operative position, manually. By my invenlar feature of my invention which produces this tion, a grab hook can be manipulated with their novel and useful result is the use of the flexible jaws in open position, by means which can be chains 6 and l to connect the arms 4 and 5 to the automatically engaged or disengaged by the op,- link 8, whereby said link 8 and dependent hook erator of the grab hook without manual adjust- 14 are not restricted to a vertical motion to and ment. from the pin l3, as is the case if rigid links are The inventive idea involved is capable of receivsubstituted for the chains 6 and 1, but are also ing a variety of mechanical expressions, one of enabled to move horizontally with relation to which is shown, for the purpose of illustration, in said pin, as a result of which the necessity for the accompanying drawing, in which: manual adjustment of said hook and said pin is Fig. l is a front elevation of a grab hook built dispensed with. Obviously, other flexible conin accordance with my invention; nections may be substituted for the chains 6 and Fig. 2 is asection thereof on line 2-2; and I.

Fig. 3 is a front elevation thereof showing the jaws of the grab hook being held in open position, through the use of my invention.

Referring to the drawing, I and 2 denote oppositely disposed jaws pivotally connected at 3 and having, respectively, oppositely extending arms 4 and 5. At the outer ends of arms 4 and 5 are Accordingly where reference is made in the claims to a flexible connection between the arms of the jaws it shall be deemed not to include means of connecting said arms to the lifting means which limit the motion of the lifting means to a straight line to and from the jaws.

Having thus described my invention what I claim as new and desire to secure by Letters Patfastened chains 6 and 1 the ends of which chains are fastened to link 8 which in turn is operatively connected to any suitable lifting means, such as a crane.

The links 9, II], II and 12 are pivotally connected to the jaws I and 2 and to the pin 13. Hook i4 is dependently fastened to link 8.

'To operate the lifting tongs, hook I4 is engaged with pin 13. By the application of lifting means to link 8, the jaws are opened and raised. The tongs thus opened can be placed over the object to be lifted and lowered until the jaws ent is:

In a device of the class described, comprising a pair of pivoted jaws each having an arm extending therefrom, a flexible connection between the arms of the jaws, means attached to the flexible connection when actuated for closing the jaws, a pivoted link connection between the jaws,

jaws.

REES C. MORGAN.

Images