US2488461A - Lift truck - Google Patents

Description

Nov. 15, 1949 s. w. WYSOCKI 2,488,461

LIFT TRUCK Filed Dec. 4, 1947 s Sheets-Sheet Stanley W. Wysock/ JNVENTOR.

Nov. 15, 1949 s. w. WYSOCKI 2,483,451

' LIFT wnucx Filed Dec. 4, 1947 s Sheets-Sheet 2 no Ian/' on as] Fig.2. 5

BY [I Nov. 15, 1949 s. w. wYsocKl LIFT TRUCK 3 Sheets-Sheet 3 Filed Dec. 4, 1947 Stanley W. Wysocki I INVENTOR.

BY W

Patented Nov. 15, 1949 UNITED STAT ES PATENT OFFICE LIFT TRI-IGK.

Stanley. W; Wysoclii, Milwaukee, Wis.. Application December 4, 1941-, sea-arm- 789,143;

3 Claims. 7 1

This invention; appertains. to.- novel anduseful improvements in manually. operated. lifts; and} trucks. An object. of this. invention: isto provide a. combination lift and truck including improved actuation means for the lift.

. Another object of; this. invention is. to providemeansfor maintaining. the. truck in selected positions.

7 Anotherpurpose of this, invention is; to. provide;- friction conducive, resiliently biased. means. as;- sociated with the saidstand,

Another purpose of; this.- invention. is-to raiseand. lower a. frame: member. in a; suitable. support and maintain, the; frame in.-s elected. elevated. positions.

Another purpose of this. invention, isto provide anextremely simple device of.- the. character. described. capable of. lifting packages. and other impedimentai and" transporting the same manually.

Ancillary objects and features of. novelty will become apparent to.- those skilled; in. the art, such as simplicity of construction and ease. of. mannefacture, in following the. descriptionof: the pre ferred. forms of the; present. invention,, illustrated in. the accompanying drawings, wherein-.-

Figure 1. is an. elevational. side view of the present invention;

- Figure 2 is, afront. View of. the inventionshown in Figural;

Figure 3 is a sectionaliview;takensubstantiallx on the 1ine3.3; of.. Figural. and in the direction of the arrows;

Figure 4 is a sectionalaview takenzsubstantially n. the line 4-4 of Figure 3 and in the direction of the-arrows;

Figure 5 is an enlarged fragmentary view illus= trating a guide'utilized inassociation. with the invention and forming a portion thereof;

Figure 6 is an enlargedlsectional view: taken substantially, on the line 66 of Figures andf in the. direction. of'the arrows;

' Figure 7 is a" transverse'sectional view? taken substantially on' the linel' Iof-Figure3- and in the direction of the. arrows Figure. 8 is a sectional view illustrating the. friction conducive meansutilizedin association with the present invention;

Figure 9 is a sectional view of a modified form of the invention, substituting gear means for the chain illustrated in Figure 3, and; 4

Figure 10 is a sectional view taken substantially on the line I0l0 of Figure 9 and in the direction of the arrows.

invention has been developed to. provide a device for the purpose of lifting, and transporting as well as loading: various types of impedimenta. The preferred forms of the invention havebeen developed-with an attempt of.

simplicity for: facility in manufacture. As is well known conventional trucks: simply transport i-mpedimentai from oneposition. to another. This invention. is-adapted; to lift. and lower the impedimentav before. andror after transportation thereof.. Attempt. has been made toprovide. a combinatiom device such as.- that disclosed by the applicant however; the. complexity of' structure was usually prohibitive In; this invention simpl-icity is achieved.

Referring; now to the. first form of the present invention. there is disclosed a. support generally indicated at [ll which: includes; a back member composed: ofa: pain of nails I12: and M- respectively having cross-braces Hi associated therewith. A base includlnga metallic platform 20 is provided ail-the: lower. portionot the rails l2 and I4 and has a suitable; cross member 2-2.. therein: for additional. rigidity. Conventional handles 24 may extend from;- the rails for the. obvious. purpose.

of; manipulation. of: the invention. Brackets 26. extend fromthe; lower. portion of the said. rails 1m order to journal: wheels: 2-8 thereby rendering a. device. mobile.

A=.pa-ir of legs. 301f0rm' a. stand for use. in. as-; sociation with the present invention and these legsmay be connected. by various. cross members including a. truss: element 32. Thistruss'element en ages. one of the. cross braces l6 and is. jour-- naled: therearound. Qf. course. suitable resilient feet-.34;- may beisupplied-i at the terminal portions. of the legs for additional friction.

In utility; of: theinvention.- the stand including the legs? 3.0. may be utilized as illustrated in Figural... Friction conducive-means is supplied in order to lock the said stand. i-n a selected. posi, tion. The said; frictionv conducive means consists of a case 36irigidly secured to the truss member 32': and a plunger 38: extending through the case and also the element 32. This/plunger hasaspring-AU normally biasing; it outwardly'of thesaid case andani; adjustable screw 41 thread-= edl-p'received; in. the: saidcase and;- for. the. purpose of; seating. the spring; A- legsupport elementw l lemaysbe supplied in association. with the. said stand and retained therein by any suitable latch means.

A frame generally indicated at 46 is supplied in association with the said support and is slidable relative thereto. This frame includes a pair of rails 18 and 50 respectively having enlarged lower portions slidably seated in said rails 12 and [4 respectively. A pair of fish plates 52 and 54 respectively are secured to the lowermost portions of the said rails 48 and 50 and a base portion of the said frame extends therefrom. This base portion is simply a platform 58 having a stiffening member 60 extending thereacross. This stiffening member is adapted to seat in the suitable aperture or slot in the said base 20 and the entire extension 58 is seated in a suitable recess in the said base 20.

Means for raising and lowering the said frame 46 is provided. It is in the raising and lowering means that the embodiment of ,the invention shown in Figure 3 differs from that embodiment illustrated in Figure 9. Taking first that embodiment shown in Figure 3, it will be seen that a shaft 62 is journaled in,the support and has a suitable handle 64 thereon. This shaft 62 has a pair of gears 68 and 68 respectively rigidly secured thereto.

A pair of brackets Ill and 12 respectively are seated on a suitable cross member '14 of the said support and a pair of shafts or axles 16 and 18 are journaled therein. Knobs 80 may be supplied at the terminal portions of the said axles for rotation thereof and a dog 82 is rigidly secured to each of the said axles. This dog is engageable with the teeth of a ratchet gear 84, two of which are supplied on the said shaft 62. It is readily apparent that by utility of this construction the shaft 62 may be maintained in a selected position, when so desired. This portion of the actuation means is common to both embodiments of the invention and the differentiating features may now readily be ascertainable as chain means for raising and lowering the frame and a rack gear means for performing the same function.

In the chain means it will be noted that a conventional link chain 98 extends around each of the said gears 66 and 68 and also around an idler gear 92 also supported in the said support. Of course, two idler gears are supplied, one for each chain in the connection. A small bracket having a U-bolt 94 extending therethrough is supplied for securing the said frame to the said chain 90. This small bracket 96 may be seen as a plate extending around the chain with the U-bolt extending through the said plate and the said frame.

The embodiment of the invention illustrated in Figure 9 shows a relatively large rack gear I engaging the said gear means 66 (and a second rack gear unshown engaging the other gear 68). Of course, the rack gears are rigidly secured to the said frame 46 for lifting purposes.

While there has been described and illustrated but preferred forms of the invention, it is apparent that variations may be made without departing from the spirit thereof.

Accordingly, limitation is sought only in accordance with the scope of the following claims.

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

1. A combination lift and hand truck comprising a support including wheels and a base, a pair of rails in said support having a frame slidably received therein, mechanical means journaled in said support for raising and lowering said frame,

. ing said stand in selected positions.

2. A combination lift and hand truck comprising a support including wheels and a base, a pair of rails forming a part of said support, a frame slidably disposed in said rails, mechanical means journaled in said support for raising and lowering said frame, said mechanical means including a rack disposed in one of said rails and fixed to said frame, a shaft rotatably carried by said support and having a gear adjacent one end engaging the teeth of said rack, means for retaining said frame in selected position with respect to said support including brackets secured to said support having an axle journaled therein, a dog secured to said axle, a ratchet gear fixed to said last-mentioned shaft and operatively engaging said dog, a pivotally mounted stand operatively connected with said support, and resiliently biased friction conducive means for locking said stand in selected positions.

3. A combination lift and hand truck comprising a support which includes wheels and a base, a pair of rails secured to said support, a frame slidably disposed in said rails, mechanical means journaled in said support for raising and lowering said frame, said mechanical means including a shaft mounted for rotation in said support and having a gear at one end, a second shaft mounted A for rotation in said support and having a second gear disposed thereon, a chain entrained around said gears, means fixing said frame to said chain, and means secured to said support for retaining said frame in selected positions with respect to saidsupport including a bracket secured to said support having an axle journaled therein, a dog secured to said axle, a ratchet gear secured to one of said shafts and operatively engaging said dog, a pivotally mounted stand operatively connected with said support, and resiliently biased friction conducive means for locking said standard in selected position.

STANLEY W. WYSOCKI.

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

UNITED STATES PATENTS Number Name Date 342,950 Caldwell June 1, 1886 393,293 Campbell Nov. 20, 1888 474,653 Defiier May 10, 1892 513,201 Robinson et al Jan. 23, 1894 FOREIGN PATENTS Number Country Date 351,771 Great Britain July 2, 1931

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