US3312432A

US3312432A - Mobile stand

Info

Publication number: US3312432A
Application number: US457267A
Authority: US
Inventors: Joseph J Pfeiffer; Harold M Peterson
Original assignee: REDEMAN CORP
Current assignee: REDEMAN CORP
Priority date: 1965-05-20
Filing date: 1965-05-20
Publication date: 1967-04-04
Anticipated expiration: 1984-04-04

Description

April 4, i967 .1.J. PFEIFFER ET Al. 3,312,432

MOBILE STAND .4o 4A I r42 BY A T TOR/VE YS n pril 4, 1967 J..|. PFEIFFER ETAL 3,312,432

MOBILE STAND Filed May 20, 1965 3 Sheets-Sheet 2 FHL- 4 ATTORNEYS April 4, i967 .1.J. PFi-:lFFl-:R ET A1. 3,312,432

MOBILE STAND 3 Sheets-Sheet 3 Filed May 20, 1965 JOSEPH J. PFElFFER HAROLD M. PETERSON I NVENTORS ATTORNEYS United States Patent 3,312,432 MOBILE STAND Joseph J. Pfeiffer and Harold M. Peterson, both of Kirkland, Wash., assignors to ReDeMan Corporation, Kirkv land, Wash., a corporation of Washington Filed May 20, 1965, Ser. No. 457,267 11 Claims. (Cl. 248-13) This invention relates to a mobile base, and particularly one providing a mounting foot for hydraulic hoist or other like or suitable extensible standard serving individually or in conjunction withy another like-mounted standard as a support -for a work platform.

For its principal object the invention aims to provide a mobile base comprised of a plurality of legs which are each arranged to extend radially from the standard at circumferentially spaced intervals of a circle having the standard tas its center, with the length of the legs such as to insure stability for the extended standard, and characterized in that the legs are of a jointed nature engineered so that when the base is not in use the articulating sections can be folded into a compass sufiiciently compact to permit storage in a small space.

The invention has the further important object of providing a mobile base of the described nature having two sets of two diametrically opposite legs and characterized in that the two sets may be shifted one set relative to the other set, into selected rotatively adjusted positions and releasably locked in said adjusted positions.

The invention has the yet additional object of providing a mobile 'base of simple and inexpensive construction, one which is light in weight and yet provides a secure footing for the column, one the legs of which may be easily and quickly folded or extended, and one which will give long and trouble-free service.

The foregoing and still more particular objects and advantages in view will appear and be understood in the course of the following description and claims, the invention consisting in the novel construction and in the adaptation and combination of parts hereinafter described and claimed.

In the accompanying drawings:

FIGURE l is a perspective view illustrating a base constructed to embody lpreferred teachings of the present invent-ion, shown with the legs extended and applied to a standard comprised of a multi-stage hydraulic hoist. For simplicity in illustration a work platform or the like carried upon the head end of the hoist is deleted from the view.

FIG. 2 is a fragmentary elevational view to illustrate one of the legs and drawn to an enlarged scale, parts being broken away and shown in section to detail a stabilizing foot with which each leg is equipped.

FIGS. 3 and 4 are detail fragmentary vertical sectional views drawn to a yet larger scale on lines 3 3 and 4 4, respectively, of FIG. l.

FIG.y 5 is a fragmentary horizontal sectional view on line 5 5 of FIG. 3.

FIG. 6 is a fragmentary elevational view detailing jointed connecting arms employed to lock the leg sets in rotati'vely adjusted positions, the scale corresponding to that of FIG. 2.

FIG. 7 is a large-scale fragmentary elevational view detailing the mounting assembly by which the legs of the base are attached to the standard.

FIG. 8 is a horizontal sectional view on line 8 8 of FIG. 7; and

FIGS. 9 l0 and ll are schematic top plan views of the base and standard showing (l) the legs extended and the connecting arms placed in an in-line position, (2) t-he legs folded for storage, and (3) the inboard legs located for working close-in to a wall.

rice

or similar to that illustrated and described in pending apl plication, Ser. No. 424,687, filed Ian. ll, 1965 jointly by ourselves and Leo J. Notenboom. Such hoist provides telescoping sections including a cylindrical lower section, and there is provided in the exterior surface of said lower section two sets of vertically spaced circumferential grooves adapted to receive snap-:rings 21. 'One set of these snap-rings is located in close proximity to the lower end of the section. The other set occupies a level elevated a rather considerable distance therefrom.

These sets of snap-rings each hold a mounting assembly in place upon the stan-dard. Provided by this mounting assembly to fit between the snap-rings is a collar 22 providing a flange at one end and having the other end threaded. On each collar two

mounting rings

23 and 24 are journaled for turning motion between the shoulder 28 (FIG. 7) provided by the fiange and a lock-type keeper ring 25 which threads on said threaded end. The mounting rings lie one above the other, and at diametrically opposite sides of each ring there is presented a respective one of two radially extending eyed lugs denoted by 26 in the instance of the upper ring and by 27 in the instance of the lower ring. Each ring has its lugs over-hanging the other ring so that the eyes of the four lugs occupy the same horizontal plane. Each ring can take approximately a half turn relative to the other ring.

Each of the four legs of the mobile base extends radially from the standard and has upper and lower arms. Forked

terminal fittings

30 and 31 upon the inner ends of the armsy connect with the eyed lugs by pins 32. The arms converge outwardly and are jointed, lbeing each comprised of two articulating sections, as 33-34 and '3S-36, and the outer ends of t-he

outer sections

34 and 36 are each rigidly joined to the castered frame 37 for an outboard stand 38. The cas-ter Wheel is denoted by 40. The stand comprises a jack-screw which is received through a vertical bore of the frame and works in the threads of a nut 41 held against endwise or rotary motion in a side pocket of the frame traversed by said stand. The stand has a beari-ng foot 42 swivelled upon its bottom end and has an adjusting wheel 43 fixed to the head end.

For each radial leg a respective vertical hinge pin 44 produces the articulation between the two

upper arm sections

33 and 34 and between the two

lower arm sections

35 and 36, the prescribed swing lbeing about a coinciding vertical axis paralleling the axial line of the standard 20. The sections are or may each com-prise a rod of tubular stock and at the hinged ends these rods are press-fitted or otherwise securely socketed in butt fittings. Planar bearing faces disposed normal to the hinge axis are provided for each pair of butt fittings, namely

fittings

45 and 46 for the articulating upper arm sections and

fittings

47 and 48 for the articulating lower arm sections. A tie-bar 49 extends from the butt fitting 45 to the terminal fitting 31. l

A tubular strut 50 surrounds the hinge pin between the two

butt fittings

46 and 47, with its ends taking a journal fit in sockets provided thereby. An upper branch 51 and a lower branch 52 are made integral with the strut and extend laterally therefrom normal or approximately normal to the strut. Acting in complement, two oppositely directed pairs of said branches articulate one with the other and produce an adjustable folding linkage between the struts 50l of two adjacent legs. Butt fittings 53-54 and 55-56, with a hinge pin 57, produce the articulation. The adjustable setting is accomplished by forming the facing surfaces of the butt fittings with mating teeth 70 (see FIG. 4). The teeth are held in mesh against the yielding force of a sp-ring 7-1 by the action of a levered cam 58 pivoted by a pin 59` upon the head end of the hin-ge pin 57. A tubularspreader 60 which surrounds the hinge pin counters the thrust imposed rby the cam. A brace 61-rigidi`1es one of the two branches. The other branch permits a moderate degree of vertical deflection as a compensation to the endwise motion of the butt fittings as angular adjustments are made. Like the strut 50, said spreader receives a journal fit in sockets provided in t-his instance by the fitting 54 and the fitting 55. The cam has. an over-center at to hold the catch against accidental dislodgment. When the linkage is in an in-line condition the inner sectionsl of the concerned two legs are caused to lie at an angularity of 90.

A levered cam 63 much t-he same as the cam 58 is pivoted at 64 to the head end of the hinge pin 44 for releasably locking the articulating sections of the leg in selected angular positions. The locking instrument in this instanceis comprised of a radial side dog 65 carried by the lever arm 66 for swing movement into and out of a seylected one of a number of open-top side pockets 67 placed at circumferentially spaced intervals about the perimeter of the 'butt fitting 46. The dog is held against rotation relative to the butt fitting 45 by catching in a side notch 68 of such fitting.

The manner in which the legs may be set and locked at different angularities with the articulating sections folded or extended will 'be understood from an inspection of FIGS. 9, and 1l showing the components of the base in three representative positions. FIG. 11 is indicative of a setting permitting the standard to be brought close into a wall.

It is believed that the invention will have been clearly understood from the foregoing detailed description of our now-preferred illustrated embodiment. Changes in the details of construction may be resorted to without departing from the spirit of the invention and it is accordingly our intention that no limitations be implied and that the hereto annexed claims be given the broadest interpretation to which the employed language fairly admits.

What we claim is: Y

1. In combination with a standard, a mobile base therefor comprising: two sets of rings mounted upon the standard for rotating about a coinciding vertical axis, each set independently of the other, with each set comprising a lower ring located adjacent the bottom of the standard and an upper ring spaced a `substantial distance above said lower ring, sets of legs for each set of rings extending radially from the rings at equidistantly spaced intervals of the circumference, each of the legs which are related to one set of rings occupying the space between two .adjacent legs related to the other set of rings, each leg having an upper arm and a lower arm jointed in each instance to provide an inner section which is attached to the respective ring and an outer section which is hingedly connected to the inner section for adjusting swing motion -about a vertical axis paralleling the rotary axis of the rings, the hinge axes for said articulating sections of the upper and lower arms of a leg coinciding a respective ground-engaging foot attached to the outer ends of thetwo outer arm sections of each leg, means for setting the outer arm sections of each leg in a selected angularly adjusted position relative to the inner arm sections, a linking connection between the hinge of each of said legs which are related to one set of rings and the hinge of an adjacent leg related to the other set of rings, said linking connection comprising two meeting links hingedly joined for adjusting swing motion about a vertical axis paralleling the hinge axes of the linked legs, and means fori` setting said hingedly connected links in a selectedangularly adjusted position.

2. Structure as claimed in claim 1 in which the groundengaging feet each include a frame having a caster wheel mounted thereon.

3. Structure as claimed in claim 2 having a respective jack means carried by each frame for movement between an elevated inoperative position and a lowered operating position whereat the weight supported by the frame is transferred from the caster wheel to the jack means.

4. Structure as claimed in claim 1 in which the inner sections of the upper and lower -arms diverage toward the standard and have a tie-bar extending from the outer end of the upper of said inner sections to the inner end of the lower of said inner sections.

5. Structure as claimed in claim 4in which the outer sections of the upper and lower arms converge toward the frame.

6. Structure as claimed in claim 1, the joined ends of the two sections of the upper arm of each leg each carrying a respective one of two complementary butt fittings, the joined ends of the two sections of the lower arm of each leg likewise carrying a respective one of two complementary butt fittings, the hinge connection being provided by a hinge pin traversing said butt fittings.

7. Structure as claimed in claim 6 in which a tubular strut extends as a spreader between said sets of complementary butt fittings in surrounding relation to the hinge pin and has an upper and a lower branch rigid with the strut and constituting one of said two meeting hingedly joined links, the hinge connection between said joined links comprising a hinge pin traversing complementary butt fittings carried upon said meeting ends of said branches.

8. Structure as claimed in claim 6, means being provided holding said upper set of complementary butt f1ttings separated from the lower set, the hinge pin projecting upwardly above the upper set of butt fittings, the means for setting the outer and inner sections of the legs in selected angularly adjusted positions comprising a respective lever pivoted to said projecting end of the related hinge pin for swing movement about a horizontal axis and carrying a dog arranged to lodge in a side pocket formed in the perimeter of one upper butt fitting and a registering one of a plurality of circumferentially spaced apart side pockets formed in the perimeter of the other upper butt fitting.

9. Structure as claimed in claim 1, the two links each providing rigidly connected upper and lower branches, the hinge connection between the links comprising a hinge pin traversing complementary sets of butt fittings one set carried upon meeting ends of two upper branches and the other set carried upon meeting ends of two lower branches, the pin projecting above said upper set of butt fittings, at least the upper .set of butt fittings providing opposing toothed jaws, a spring being provided yieldingly spreading said jaws, the means for setting the joined links in angularly adjusted relation acting in opposition to said spring and comprising a levered cam pivoted to said projecting end of the hinge pin for swing motion about a horizontal axis.

10. `Structure -as claimed in claim 1, said rings being mounted in pairs, with each pair comprising one ring from one and one ring from t-he other of the two sets of rings, the mounting for each pair compris-ing a respective collar held by snap-rings against endwise displacement upon the standard, the rings being journaled upon the collar between a shoulder provided at one end of the collar and a keeper ring threaded upon the other end, the two rings of each pair being each formed at diametrically opposite sides with a respective eyed lug each attached by a horizontal pin to the forked inner end of an inner section of a radially extending leg.

11. yIn combination with a standard, a mobile base therefor comprising: two sets of rings mounted upon the standard for rotation about a coinciding vertical axis, each set independently of the other, with each set comprising a lower ring located adjacent the bottom of the standard and an upper ring spaced a substantial distance above said lower ring, sets of legs for each set of rings extending radially from the rings at equidistantly spaced intervals of the circumference, each of the legs which are related to one set of rings occupying the space between two adjacent legs related to the other set of rings, each leg being jointed and comprising an inner section which is attached top and bottom to the related set of rings and an outer section which is hingedly connected to the inner section for adjusting swing motion about a vertical axis paralleling the rotary axis of the rings, a

respective ground-engaging foot attached to the outer end of the outer section of each leg, a linking connection between the hinge of each of said legs which are related to one set of rings and the hinge of an adjacent leg related to the other set of rings, said linking connection comprising two links hingedly joined for adjusting swing motion about a vert-ical axis paralleling the hinge axis of the linked legs, a means for setting the two links of References Cited by the Examiner UNITED STATES PATENTS 859,781 7/1907 Roebuck 248-188 X 2,474,250 6/ 1949 Howard 248--1 2,646,956 7/1953 Cadwell et al. 248-170 3,208,698 9/1965 Samhammer et al. 248-13 CLAUDE A. LE ROY, Primary Examiner.

JOHN PET-O, Examiner.

Claims

1. IN COMBINATION WITH A STANDARD, A MOBILE BASE THEREFOR COMPRISING: TWO SETS OF RINGS MOUNTED UPON THE STANDARD FOR ROTATING ABOUT A COINCIDING VERTICAL AXIS, EACH SET INDEPENDENTLY OF THE OTHER, WITH EACH SET COMPRISING A LOWER RING LOCATED ADJACENT THE BOTTOM OF THE STANDARD AND AN UPPER RING SPACED A SUBSTANTIAL DISTANCE ABOVE SAID LOWER RING, SETS OF LEGS FOR EACH SET OF RINGS EXTENDING RADIALLY FROM THE RINGS AT EQUIDISTANTLY SPACED INTERVALS OF THE CIRCUMFERENCE, EACH OF THE LEGS WHICH ARE RELATED TO ONE SET OF RINGS OCCUPYING THE SPACE BETWEEN TWO ADJACENT LEGS RELATED TO THE OTHER SET OF RINGS, EACH LEG HAVING AN UPPER ARM AND A LOWER ARM JOINTED IN EACH INSTANCE TO PROVIDE AN INNER SECTION WHICH IS ATTACHED TO THE RESPECTIVE RING AND AN OUTER SECTION WHICH IS HINGEDLY CONNECTED TO THE INNER SECTION FOR ADJUSTING SWING MOTION ABOUT A VERTICAL AXIS PARALLELING THE ROTARY AXIS OF THE RINGS, THE HINGE AXES FOR SAID ARTICULATING SECTIONS OF THE UPPER AND LOWER ARMS OF A LEG COINCIDING A RESPECTIVE GROUND-ENGAGING FOOT ATTACHED TO THE OUTER ENDS OF THE TWO OUTER ARM SECTIONS OF EACH LEG, MEANS FOR SETTING THE OUTER ARM SECTIONS OF EACH LEG IN A SELECTED ANGULARLY ADJUSTED POSITION RELATIVE TO THE INNER ARM SECTIONS, A LINKING CONNECTION BETWEEN THE HINGE OF EACH OF SAID LEGS WHICH ARE RELATED TO ONE SET OF RINGS AND THE HINGE OF AN ADJACENT LEG RELATED TO THE OTHER SET OF RINGS, SAID LINKING CONNECTION COMPRISING TWO MEETING LINKS HINGEDLY JOINED FOR ADJUSTING SWING MOTION ABOUT A VERTICAL AXIS PARALLELING THE HINGE AXES OF THE LINKED LEGS, AND MEANS FOR SETTING SAID HINGEDLY CONNECTED LINKS IN A SELECTED ANGULARLY ADJUSTED POSITION.