US1706194A - A gokfobation - Google Patents

Description

March 19, 1929.

w. STUEBING, JR

LIFTING TRUCK Filed Jan. 21, 1926 l lmmll" 2 Sheets-Sheet '1 anvvntaz March 19, 1929. w, 'sTu m JR- 1,706,194

LIF'TING TRUCK Filed Jan. 21, 1926 2 Shana-Sheet 2 awumbo'c Patented Mar. 19, 1929.

UNITED STATES mane PATENT OFFICE.

WILLIAM'STUEBING, JR., OF CINCINNATI, OHIO, ESEJGNOE- TO THE STUEBING-COWAN COMPANY OF CINCINNATI, OHIO, A CORPORATION 01? OHIO.

LIFTING TRUCK.

' 7 Application filed January a1, 1926.

The present invention relates to lifting trucks of the type in which the steering and draft handle or tongue is operative to lift the load.

r'imong the objects to which the invention is addressed is to provide an improved lifting truck whereof the steering tongue may be operated to lift the load when said tongue is swung in a plane other than that of the longitudinal center line of the truck. Lifting trucks of this class are commonly designated as side-lift or anglelift trucks, and possess the advantage of being operable to lift the load in relatively limited spaces wherein it is diflicult or impossible to operate the lifting mechanism by swinging the tongue in the plane of the longitudinal center line of the truck.

. In all practical liftingtrucks the loadbearing and lifting frame or platform is arranged to move upwardly in a direction parallel to the vertical plane of the longitudinal center-line of the truck, although in many instance the lifting platform is also arranged to move forward or backward as it rises vertically. In lifting trucks of the straight-forward lift type, therefore, the operating tongue (usually the steering-tongue) has ordinarily been arranged to swing in the 0 same place of motion as that of the lifting platform. This permitted the necessary connections between the lifting platform and the tongue to be simple and. direct and to be moved in one general direction during the lifting operation, as maybe observed for example in United States Letters Patent No. 1,104,533to C. E. M. Miller, patented July 21, 191 i, No. 1,257,650 to W. Stuebing, Jr, patented February 26, 1918, and No. 1,373,069 to Hennessy, patented Mar. 29, 1921.

In side-lift trucks, however since the lifting-tongue must be operable as such in numerous planes other than the vertical plane muted into motion in or parallel to the plane of the trucks longitudinal center line to raise the elevating platform rcgardlesscf whether the tongue is swung on the center line or to either side thereof. In all,or substantially all, types of practical side-lift "frame n 1 disconnected .s view in side elevation, showing Serial No. 82,676.

trucks in cemmcrcialv use prior to the present invention the provision of such joint has involved either mechanical complication and multiplici y of parts, or else defects or opive limitations of one sort or another, all of which undesirable defects or limitations the present invention is calculated to obviate.

in the present invention simplicity of structure has been attained through the pro *ision of direct connection between the steering tongue and the elevating frame, the specific embodiment illustrated having the steering tongue provided with a unitary rigid lifting member extending between the steering tongue and elevating frame and capable of-maintaining its ope "ative relationship to lift the frame regardless of movements of the steering tongue to various steering positions, the arrangement of the parts being such that as the steering tongue is swung laterally to different steering positions, the lifting member, positively and permanently connected, with the steering tongue, swings with it and assumes different angular positions relative to the elevating frame corresponding to the angular steering positions of the tongue. Such an arrangement not only simplifies side-lift truck construction, but promotes other advantages, as, for example, the possibility of having the connecting joint or point previously mentioned occupy any mechanically convenient position relative to the other parts of the structure, the position of this point not necessarily being close to the vertical axis of the truclrs steering post as is the case in many structures shown 1n existing patents).

'll'hese features in combination with others hereinafter described and claimed differentiate the present invention from the trucks hitherto in use, and may be better understood from a consideration of a particular illustrative embodimentthereof hereinafter de scribed Wltll reference to the accompanying ings, in which:

F1 is a plan view of a lifting truck embodving the invention, showing the elevating s lmvered position and the lifting 11 ill po tion to elevate theload is a central. sectional view of the same, but showi the lifting mechanism from the load;

Fig. the eleiating frame in its uppermost position, locked in uppermost position and with he lifting mechanism disconnected therefrom.

Tl e truck shown for the purposes of illustrating the invention has a mainframe and a load. supporting elevating frame .6. A steering head 7 is rotatably mounted in a transverse yoke 8 forming a part of the main frame and to which yoke the side bars 9 of the main frame are rigidly connected as by means of bolts 10 as best shown in Figs. 1

and 2. The elevating frame is supported on the main frame by means of similar links 11 and 12 pivotally connected to the main frame at the front and rear ends thereof.

For the purpose of permitting the lifting and lifted elements to assume various different angular positions relative to each other, an arcnate angular member l 'l is secured to the elevating frame in position to be engaged .by a cooperating tension member or nook 15 pivoted at 16 to the steering handle, said members being so formed that they may read ily be interengaged and disengaged, one member occupying a certain normal position relative to the other when the steering tongue is in its central straight-forward position, and one of said members being extended laterally from said normal position a substantial distance, i. e. a distance sufficient to permit interengagement of said members when said steering handle is in different steering positions to permit side or angle lift.

Normally the: hook 15 is held in elevated position by means of a spring 17 and is connected with the arcuate member lei by pres- I sure of the foot upon a pedal projection 18 shown in Fig. l.

The member 14 may well be so formed that the center of the arcuate path along which the members lei and 15 may connect, lies to i the rear of the vertical axis of the steering head 7 when the elevating frame is in lowered position. The hook 15 may be formed with its engaging face either straight laterally of thetruck, or concave, but if concave, it should be formed on a slightly greater arethan that of the arcuate member i l to accommodate the $9 this member relatnre to the handle.

Any suitable lock may be provided for holdin the elevating frame in its uppermost position.

shown, a locking hook 20 is pivotally mounted on the hook 8, and positioned toengage a corrciuionding hook of the elevating frame. This hook is normally urged into locking position by means of a spring 23, but may be released by pressure on the forwardly extcndii k lal projection 21 forming part of the locking member.

It will be understood that the invention may be variously modifier. and embodied within the scope of the subjoined rlaims.

What i claim is: r

1. A lifting truck conmrising. in combination, a main frame hav ng a snivelled steering head, an elevating frame mounted on the mainframe and movable upv-rardlv relative thereto, a vertically s ringing steering lever, a direct connecti 11 between the steering lever and elevating i'rame comprising interengageable members carried respectively by the steering lever and elevating frame, one of which extends laterally a substantial distance from its position of engagement with the other when the steering lever is in cen position and permitting interengagement in different steering positions of the handle.

2. A lifting truck comprising, in combination, a main frame having a swivelled steering head, an elevating frame mounted on the main frame and movable upwardly relative thereto, a Vertically swinging steering lever, a direct connection between the steering lever and elevating frame comprising interenga ing hook members, one of which has an arcuate engaging portion substantially as and for the purpose described. 7 A lifting truck comprising, in combination, a main frame having a swivelled steering head, an elevating frame mounted on the main frame and movable upwardly relative thereto. a vertically swinging steering lever, an arcuate hook men'iber secured to the elovating frame, and a hook member pivoted to the steering lever to swing vertically in the plane of movement of the steering lever and engageable with and disengageable from the arcuate hook member in arious steering positions'. v

4. A lifting truck comprising", in combination, a main frame having a swivclled steering head, an elevating frame mounted on the main frame and ll'lOVllJlQ upwardly relative thereto, a vertically swinging steering lever, a member carried by the ele ating frame and extending laterally a substantial distance, a member carried by the steering handle and engageable with and disengage- V able from different portions of said laterally extending member in various steering positions to lift the elevating frame.

5. A lifting truck comprising, in combination, a main frame having a swivellcd steering head, an elevating frame mounted on the main frame and movable upwardly relative thereto, a veiauallv swinging steering lever, a member presenting a hook extending till lll)

transversely of the elevating frame 011 an arc the center of which lies rearwardly of the axis of the swlvelled head, and means for connecting the handle to the arcuate hook substantially as and for the purpose described.

GJA lifting truck comprising in combination a main frame having a swivelled steering head, an elevating frame mounted on the main frame and movable upwardly relative thereto, a vertically swinging steering lever, an arcuate hook member secured to the elevating frame in such position that the center of the arc thereof lies rearwardly of the axis of the swivelled steering head, and a hook member pivoted to the steering lever to swing vertically and engageable with the arcuate hook member in various steering, positions to 11ft the elevating frame.

7 A lifting truck comprising in combination a main frame, an elevating frame, a

steering lever, a hook extending transversely of the elevating frame on an arc whose center lies forward of the hook, and means connecting the steering lever to the hook to lift the elevating frame.

8; A lifting truck comprising, in combina tion, a main frame having a swivelled steering head, an elevating framehaving a-surface extending "laterally a substantial distance, a vertically swinging steering lever, a hook .pivotally carried by the steering lever and engageable with the elevating frame at different points of said surface to lift said elevating frame.

9. A lifting truck, as defined in claim 2, comprising a spring tending to disengage the hook members.

10. A lifting truck, as defined in claim 2,

mounted thereon and arranged to be upwardable movable relatively thereto, a steerng swivel mounted upon said main frame, a steering tongue plvotally mounted upon said steering swivel and provided with arearwardly extending llftlllg member ar-' ranged to be moved by said steering tongue to raise said elevating frame, means rigidly mounted upon said elevating frame provided with surface extending a substantial distance to the right and left of the longitudinal center-line of said elevating frame and so positioned as to be in the operative path of the free end of said lifting member when the latter is operated to raise said elevating frame whether said lifting member be operated to the right or left of said center line, whereby said lifting member may engage said surface at various points to raise said elevating frame when said steering tongue is operated to the right or left of its straight fori ward position.

12. A'lifting truck comprising, in combi- .nation, a main frame, an elevating frame mounted thereon and arranged to be longitudinally and upwardly movable relative thereto, a steering swivel mounted upon said main frame, a steering tongue pivotally mounted upon said steering swivel, a lifting member operatively connected to said steering tongue to raisesaid elevating frame, said elevating frame being provided with surface extending a substantial distance to the right and left from its longitudinal center line and so positioned as to interpose different portions of said surface in the operative paths of said lifting member in accordance with the positions wherein said tongue is operated to the right or left of the longitudinal center line of the truck.

13. A lifting truck comprising in combination a main frame having supporting and steering wheels, a steering tongue provided vith a pivotal connection to said steering wheels permitting said tongue to be swung in a. vertical plane and having a rearwardly extending lifting member, an elevating frame upwardly movable relatively to said main frame and having a lifting contact surface positioned to form a pivotal connection wit-h the free end of said lifting member, one of said pivotal connections being free to move in an arcuate path'on either side of the longitudinal center line of the truck as said steering tongue is turned laterally to various steering positions, and means, independent of said lifting member, to lock said elevating frame in raised position.

14. A lifting truck comprising in combination a main frame having supporting wheels and a steering wheel mounted to turn on a vertical axis, a steering tongue having a point of connection with said steering wheel and provided with a rearwardly-extending lift ing member, an elevating frame upwardly movable relatively to said main frame and having a contact surface positioned to afford a point of connection with the free end of said lifting member, one of said points of connection being movable a substantial distance in a horizontal arcuate pathin accordance with lateral movements of said steering tongue as the latter is turned to various steering positions whereby the parts may maintain operative lifting relationship when said tongue is in said various positions, and means independent of said lift-ing member to lock said elevating frame in its elevated position.

15. A lifting truck comprising in combina-- tion a main frame having supporting wheels and a steering wheel mounted to turn on a vertical axis, a steering tongue pivotally con- I nected to said steering wheel and provided with a rearwardly-extending lifting member, an elevating frame upwardly movable relatively to said main frame and having a surface to making lifting contact with the free,

end of said lifting member, said lifting member being arranged to be turned horizontally by and with said steering tongue a substantial distai'iee without moving out of operative lifting position relative to said surface whereby said elevating frame may be lifted through said tongue when the latter occupies various steering positions substantially to one side .of its straight forward position.

16. A lifting truck comprisingin combination s )aced en Jortim wheels an elevating frame upwardly movable relatively thereto, a draughttongue mounted to pivot Vertically and horizontally relatively to said frame and provided With a rigid lifting member movable by and with said tongue to raise said'frame relatively to said wheels, and an element integral with said framefor cooperative lifting contaee with the free end of said rigid lifting member, the parts being shaped and positioned to permit said tongue to be operated at substantial distances to one side of its straight forward position to lift said frame without disengagement of said lifting memher from said element.

17. A lifting truck comprising, in combination, a main frame having supporting and steering wheels, an elevating frame mounted thereon for upward movement relatively thereto, elevating and steering means including a tongue connected to said steering wheels to guide the same, pivoted to be swung vertically relatively thereto and provided with a lifting member having a rearwardly-extending free end, means integra-il with said elevating frame shaped and positioned to be engageable by said free end of said lifting member when said tongue is swung vertically in a forward direction to raise said elevating plat form, said free end and said last-named means bemg relatively shaped and positloned to permit said lifting member to describe circularmovement relative to said last-named means without breaking contact therewith as 831d tongue is swung laterally to varlous steering positions, and means independent of said member for holding said elevating frame in elevated position.

I In testimony whereof, I have signed my name to this specification this seventeenth day of December, 1925.

WILLIAM STUEBING, JR.

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