US723155A - Combined lifting-jack and stump-puller. - Google Patents

Description

PATEN'I'ED MAR. 17, 1903 0. G. HOPFMANN. GOMBINED LIFTING JACK AND STUMI FULLER.

' APPLIOATION IILI-D MAY 9. 1901.

a T all whom it may concern:

lever. a Theletters designate the parts referred to.

a by plates (1 d.

Y UNITED STATES Be it known that l, CHARLES G. HOFFMANN,

acitizen of the United States, and a resident 1 of Needy, Clackamascounty, State of Oregon,

have invented a new and useful Combined Lifting-Jack and Stump-Puller, OfWhlOh the following is a specification, reference being a had to the accompanying drawings as a part thereof. p

My inventionrelates more particularly to stump-pullers operating on the lifting-jack principle, and has for its object to furnish an elficient and powerful device which is besides so constructed as to be conveniently operable under conditions which heretofore have imposed annoying obstacles. For example, in order to be effectively used, the

operating-lever of such device needs to have suflicient length; but manytimes the end of the lever is broughtso close to the ground that it allows onlya very limited action or is so awkward to handle that no effective work can be done. These inconveniences are especially met with while clearinglan uneven the jack in a hollow in order to operate on the root of a tree. Toavoid such difficulties, my invention is of the construction illustrated in the drawings and hereinafter described.

beingremoved. Fig. 3 is a partial elevation Fig. 4 is a planof the top of the rear face.

end ofrthe jack with the operating-lever removed, and Fig. 5 is a plan of the operating The frame a is of substantial construction. It has a vertical slot 1) on its rear face to receive the rack-bar c, and the two face portions on either side of such slot are reinforced In the upper part of the frame is a recess e, and in such recess is inserted a I l U-shaped plate f for the purpose of strengtht ening the portions of the frame on either side of such recess, and particularly for providing a durable bearings for the bolt g, which extends crosswise through the head of the frame and said plate f. The link his pivotally suspended from the bolt g, and on such piece of land and also when required to set In such drawings, Figure 1 is a vertical lon-t gitudinal section of my invention;

PATENT OFFICE;

it CHARLES e. HOFFMANN, on" NEEDY, OREGON.

{coM BINED LlFTlNG-JACK AN DSTUM P-PULLER.

$IEqIEIoarIo1\r-fornungpart of Letters fatent No. 723,155, dated March 17, 1903.

Application filed May 911901; Serial No. 59,530- (No model.)

"link isfnlcrumedthe operating-leveri. In

comprises two parts pivotally connected by a pivot-pint The part 2' is bifurcated and may be constructed of two outer plates t t and an intermediate plate 2' riveted together, as shown in Fig. 5. tends crosswise in the inner end of thebifurcated portion 71 for engaging the rack-bar when lifting the same. The inner end of the portion t projects beyond the pivot-pin t and has a flaring head If, provided with aseries of perforations is, arranged relatively with respect to said pivot-pin, and asingle registering perforation isprovided in the bifurcated portion 11 in whichto insert the locking-pint.

The object of the described construction is to allow the vertically-movable head or inner portion t' of the lever to be relatively adjusted, so as to bring the pole-handle m, inserted in the sockets 'lbl't', up or down within convenient workin g reach. To hold the locking-pin Z in place, it is provided witha hole at its end in which to insert a split pin 0. The rackbar has a projecting portion c and a pronged head 0 It slides in the groove 17 and is held in place by a plate 19. Eitherof the extremities of the rack-bar is brought into play, according to circumstances when operating upon an object. The spring dog or detent q is bolted to the frame in such manner that the nose of such detent normally enters one of the notches of the rack-bar and holds the latter against dropping. The camr has axlelike extremities, which are seated in eyes 8, 1 and a lever-handler is provided for operating the cam, so as to lift the spring-detent q clear of the rack-bar to free the latter and allow it to drop. The rack-bar is operated in the usual way by the operating-lever 'i, which is pushed against the rack-bar, so as to bring the pin j in one of the notches. After the inner end of the operating-lever has so engaged the rack-bar, the latter may be lifted by depressing the free end of the operating-lever. The operating-lever being then lifted t-obring the same in engagement with a lower, notch, the operation is repeated, and ..to drop the rack-bar it is but necessary to lift the leverhandle r. The adjustable feature of the operating-lever of my device renders the same The'pin j exits general construction such operating-lever capable for effective use under all conditions which heretofore were the cause of considerable inconvenience, as above mentioned.

Having fully described my invention, now what I claim, and desire to secure by Letters Patent, is-

l. A combined lifting-jack and stumppuller consisting of a frame, a, having a vertical slot, 1), and recess, 6, reinforcing-plates, cl, (1, the rack-bar, 0, provided with hooked toe, c, and pronged head, 0 the retainingplate, 1), the bearing-plate, f, within the recess, e, the bolt, g, the link, h, pivotally suspended from the bolt, 9; the operating-lever pivotally supported by its forked head, '5, from the link, h, and provided with a pin, j, adapted to enter and engage with the notches of the rack-bar; said operating-lever comprising two pivotally-connected parts, 2', t and the part, *3, being vertically adjustable; means for retaining the part, 2' in its adjusted position; the sockets, n, 'n, on the lever, 11 adapted to receive a pole-handle; a spring-actuated detent for holding the rack-bar when raised, and means for releasing said detent from the rack-bar again, substantially as described.

2. A combined lifting -jack and stumppuller consisting of a frame, a, having a vertical slot, b, and recess, 6, reinforcing-plates, d, d, the rack-bar, 0, provided with hooked toe, c, and pronged head, 9 the retainingplate, p, the bearing plate,f,'within the recess, e, the bolt, g, the link, h, pivotally suspended from the bolt, g; the operating-lever pivotally supported by its forked head, 11, from the link, h, and provided with a pin,j, adapted to enter and engage with the notches of the rack-bar; said operating-lever comprising two pivotally-connected parts, 2', 2' and the part, 2' being vertically adjustable; means for retaining the part, 2' in its adjusted position; the sockets,-n, n, on the lever, 1Z adapted to receive a pole-handle; the spring-de-

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