US2492597A

US2492597A - Log lifting jack

Info

Publication number: US2492597A
Application number: US38199A
Authority: US
Inventors: Schnadt Elmer
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-07-12
Filing date: 1948-07-12
Publication date: 1949-12-27
Anticipated expiration: 1966-12-27

Description

Dec. 27, 1949 E. SCHNADT LOG LIFTING JACK 2 Sheets-Sheet 1 Filed July 12, 1948 'Fig.2.

Elmer Schnadt JNVENTOR.

9 BY WWW Filed July 12, 1948 2 Sheets Sheet 2 Fig v Fig.4

Dec. 27 1949 sc 2,492,597

LOG LIFTING JACK Elmer Schnadt INVENTOR.

BY @Mm mf nay 3m Patented Dec. 27, 1949 UNITED STATES PATENT OFFICE LOG LIFTING JACK Elmer Schnadt, Sumner, Iowa Application July 12, 1948, Serial No. 38,199 3 Claims. (01; 254 135) The present invention relates to new and useful improvements in jacks and more particularly to a log lifting jack embodying means for engaging and raising one end of a log to hold the same in an elevated position above the ground while the log is being sawed to prevent the binding of a saw in the saw out.

An important object of the invention is to provide a portable log lifting jack which may be easily and quickly moved into a desired position with respect to a log while sawing the same.

More specifically the invention embodies the provision of a pair of posts positioned at opposite sides of a log with a chain anchored at its ends to the respective posts to provide a saddle in which a log is seated and providing one of the posts with jacking means whereby the log may be raised into a desired elevated position.

A further object of the invention is to provide a device of this character of simple and practical construction, which is strong and durable, efficient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view showing the log lifting jack in position for supporting a log thereon;

Figure 2 is a top plan view;

Figure 3 is a front elevational view of the stationary post of the jack device;

Figure 4 is a similar view of the vertically adjustable posts of the jack device;

Figure 5 is a. transverse sectional view taken substantially on a line 5-5 of Figure 4, and;

Figure 6 is a transverse sectional view taken substantially on a line 6-6 of Figure 3.

Referring now to the drawings in detail wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention the numeral 5 designates the stationary part of the lack device and the numeral 6 designates the vertically adjustable or lift part of the device, the

parts

5 and 6 being portable for positioning at the opposite sides of a log 1.

The part 5'comprises a channel iron post 8 suitably secured on a base 9 for supporting the post in an upright position, the post 8 having a vertical slot I0 therein and to the outer sur- 2 face of the post is secured a plurality of bars II in a horizontal position and vertically spaced with respect to each other and placed cross-wise or in bridging relation with respect to slot Ill.

The lift part 6 of the device comprises a base I2 to which a pair of vertical angle iron guides I3 are suitably secured in spaced parallel relation with respect to each other and between Which a hydraulic or other suitable conventional type of jack I4 is positioned for resting on the base I2. The jack I 4 includes a jack post I5 operated in a reciprocating movement in the usual manner by the jack and to which is suitably secured a lift plate 26 positioned vertically at one side of the post I5 and which may be composed of laminations 21 including a relatively narrow intermediate lamination 28 to form vertical grooves 29 at the side edges of the lift plate receiving the opposed edges of the guides l 3 for sliding thereon.

The construction of the lift plate 26 also includes a bar 30 which projects outwardly from one surface of the lift plate and formed at its outer edge with inclined notches 3|.

Inclined braces 32 extend from the base I2 to the upper portion of the guides I3 to hold the same rigid.

A chain 33 forms a sling under the log I with one end of the chain inserted in the slot Ill of post 8, the chain being anchored in the slot by one of the links 34 positioned cross-wise of the slot and supported on one of the cross bars I l.

The other end of the chain is attached to the lift plate 26 of the jack I4 by engaging a ring or the end link 35 of the chain in one of the notches 3| of the bar 30 carried by the lift plate.

The operation of the jack M in the usual manner by the handle 36 thereof will raise jack post l5 and lift plate 26 which slides in guides I3 to lift the adjacent end of the chain 33 and thus raise the log into a desired elevated position to support one end of the log while sawing the same.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown anddescribed a preferred embodiment of the invention, the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A log lifting apparatus comprising in combination, a sling for a log, an upstanding sling attaching member at each side of a log one of said attaching members including vertically spaced apart anchoring means for selective anchoring engagement of one end of the sling thereto, quickreleasable anchoring means carried by the other of said attaching members for the other endof the sling, and jacking means for said last-named anchoring member.

2. A log lifting apparatus comprising in com, bination, a portable post positioned at one side of a log and having a vertical slot therein, vertically spaced apart horizontal bars secured to the post across the slot, a chain extending under the log with one of its links anchored crosswise in the slot over one of said cross bars, a jack positioned at the opposite side of the log, and means carried by the jack for attaching the adjacent end of the chain thereto.

edge for selectively attaching the adjacent end of the chain'thereto.

ELNIER SCHNADT.

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

UNITED STATES PATENTS Number Name Date 788,202 Gillette Apr. 25, 1905 1,042,663 Fillion- Oct. 29, 1912 2,259,789 Akins Oct. 21, 1941