Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3429398 A
Publication typeGrant
Publication dateFeb 25, 1969
Filing dateSep 20, 1967
Priority dateSep 20, 1967
Publication numberUS 3429398 A, US 3429398A, US-A-3429398, US3429398 A, US3429398A
InventorsPayne Robert L, Reynolds Kent R
Original AssigneeReynolds Kent R, Payne Robert L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable movable scaffold
US 3429398 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 25, 1969 REYNOLDS ET AL 3,429,398


ADJUSTABLE MOVABLE SCAFFOLD Z of 2 Sheet Filed Sept. 20, 1967 INVENTORS KENT R. REYNOLDS ROBERT L. PAYNE BY 2 ATTORNEY 3,429,398 ADJUSTABLE MOVABLE SCAFFOLD Kent R. Reynolds, 1922 W. State St. 53233, and Robert L. Payne, 6010 N. 113th St. 53225, both of Milwaukee, Wis.

Filed Sept. 20, 1967, Ser. No. 669,099 US. Cl. 18213 Int. Cl. E04g 1/34, 1/18 4 Claims ABSTRACT OF THE DISCLOSURE Our invention relates to adjustable and movable scaffolds, and more particularly to a device that acts as a working platform that may be adjusted for height, and

moved about by the user, without dismounting therefrom.

'The prime object of our invention is to provide a device that may be manually adjusted for height and moved to any predetermined position by the operator while he rests on the surface of the working platform.

Another object of our invention is to provide a device of the character described that may be folded into a compact position for ease in transportation.

Still another object of our invention is to provide a removable work bench or support for the material being used such as paint or the like, for the convenience of the operator.

A further object of our invention is to provide a device that enables the operator to adjust the drive while mounted on the working platform.

It is manifest to anyone familiar with the art of painting walls or the like, that the moving of ladders, or other equipment for the support of the workman, is frequently very inconvenient and even hazardous for the workman while performing his duties, and it is the prime object of our invention to provide a device that may be adjusted to the proper height and conveyed to any predetermined location by the workman while he is mounted on the top of the work platform.

It may be manually raised to the proper height before mounting, and maneuvered to any location by the workman while he occupies the working platform.

Other and further objects of our invention will become more apparent as the description proceeds when taken in conjunction with the drawings, in which:

FIGURE 1 is a side wiew of the entire assembled device constituting our invention.

FIGURE 2 is a top view of the device showing the driving means taken at the line 22 in FIGURE 1.

FIGURE 3 is a view of the device shown in FIGURE 1 taken at the line 3-3 therein.

FIGURE 4 is a schematic view of the platform supports in a folded position.

FIGURE 5 is a fragmentary view of the driving wheel and its support in relation to the platform support.

FIGURE 6 is a side view of the lever arrangement to adjust the drive belt, depending on the height of the platform, and

FIGURE 7 is a similar view as shown in FIGURE 6 in a varied position.

nited States Patent irfice 3,429,398 Patented Feb. 25, 1969 Similar characters of reference indicate corresponding parts and features throughout the various views, and referring now to the same, the character 10 shows a horizontal platform equipped with a centrally disposed opening 11 and shown equipped with four tubular supports 12, vertically disposed and shown attached to the lower surface of the platform 10 by means of flanges 13.

The tubular supports 12 slidably engage tubular members 14, which members 14 are provided with apertures 15 in alignment with apertures 16 in the tubular supports 12, and the pins shown as 17 may be manually inserted to engage the apertures 15 and 16 to retain the platform 10 at a predetermined height.

There are angular cross-members shown as 18 attached at 19 to the tubular members 14, and oppositely disposed cross-members shown as 20 attached at 21 to the tubular members 14. The cross-members 18 and 21 are provided with aperture 22 to accommodate vertical rods shown as 23.

The lower ends of the four tubular members 14 are equipped with swivel type casters 24 of any conventional design.

There is a vertical steering and driving assembly extending through the center opening 11 of the platform 10. This assembly consists of a lower member 25 supported by a pair of horizontal members 26 and 26' extending from one of the angular members 20 and held in spaced relation to one another by the vertical member shown as 27.

The lower end of the member 25 is equipped with a drive Wheel 28, supported by a yoke 29 and mounted rotatably therein on a shaft 30, supporting a pulley 31 keyed to the shaft 30.

The yoke 29 is rigidly attached at 32 onto the lower end of the vertical lower member 25. There is a compression spring shown as 33 surrounding the vertical member 25, which spring is supported by a collar 34 attached to the member 25. This spring is disposed as shown between the collar 34 and the horizontal member 26' (see FIGS. 1 and 5).

The upper vertical member 35, forming a part of the steering and driving assembly, telescopically engages at its lower end a sleeve 36, which sleeve is attached to the lower vertical member 25 at 37. The sleeve 36 has longitudinally vertical slots 38 (see FIGS. 6 and 7), and the member has a pin 39 extending therethrough, and the outwardly extending end of the pin 39 engages a lever 40, which in turn engages a bar 41 at 42 and another bar 43 at 44.

The bar 43 is hingedly supported at 45 by the sleeve 36, and the bar 41 is pivoted on a bar 46 at 47, and the bar 46 is hingedly supported by the mounting 45 on the sleeve 36.

There is a lever 48 supported at 47 by the hinged connection of the bars 41 and 46. This lever 48 has a pin 49 extending therefrom, to engage the bar 46 (see FIG. 7) when the assembly is in a position as shown in FIG. 7.

By referring to FIGS. 1 and 2, it will be noted that the upper end of the vertical member 35 is equipped with a yoke 50 attached to the member 35 at 57, and the extreme upper end of the member 35 has a steering wheel 52 attached thereto in any conventional manner.

The yoke 50 supports a rotating shaft 53 onto which a pulley 54 is attached, and the outwardly extending end of the shaft 53 is equipped with a crank 55, which may be of any conventional design.

There is a belt shown as 56 extending from the upper pulley 54 to the lower pulley 31, so that when the crank 55 is revolved by the operator on the platform 10, the drive wheel 28 will, due to coetficient of friction with the floor surface, move the entire assembled device, and the movement of the steering wheel 52 will move the drive wheel 28 and guide the movement of the entire scaffold in any predetermined direction.

The object of the assembly shown in FIGS. 6 and 7 is to raise and lower the upper vertical member 35 within the sleeve 36, to conform to the height of the platform 10 which is manually adjusted and held by the pins 17 engaging the apertures and 16.

In FIG. 1, we also show a table 57 which may be of any shape or contour, supported by a rod 58, shown attached to the top surface of the platform 10 at 59. Obviously, the rod 58 may be provided with a large flange, or the like, for contact with the upper surface of the platform 10, so it may be moved to any convenient location thereon.

From the above description, it will become manifest that the entire assembled device provides a new and novel type of working platform that may be manually adjusted for height, and manipulated by the workman so that it may be moved to any predetermined location while he is on the working platform.

Although we have shown a specific construction and arrangement of the parts, we are fully cognizant that many changes may be made in their construction and arrangement without affecting their performance, and we reserve the right to make such changes as we may deem convenient without departing from the spirit of our invention or the scope of the claims.

We claim:

1. Adjustable and movable scaffold comprising:

a platform having an opening at substantially the center thereof,

said platform being mounted for vertical adjustment with relation to roller casters in order that said platform can be moved as well as adjusted vertically, and

with said scaffold extending from the ground and up ward through said opening at said center without contacting said opening,

whereby said scaffold can be driven and steered from said platform without the necessity of dismounting from said platform.

2. A scaffold, as defined in claim 1, wherein:

said vertical steering and driving assembly is pivotally mounted and has a wheel on the lower end thereof, said wheel having driving means attached thereto that are actuatable from said platform,

said vertical steering and driving assembly having a steering Wheel on the top thereof to turn said wheel in a selectable direction.

3. A scaffold, as defined in claim 2, including side members supporting said platform intermediate said casters, angular cross-members attached to and pivotally associated with said side members,

said cross members forming a rectangle that is pivotal at each of its corners,

horizontal means rigidly extending from one of said side members and being attached to said vertical steering and driving assembly. 4. A scaffold, as defined in claim 3, wherein: the height of said steering and driving assembly is vertically adjustable.

References Cited UNITED STATES PATENTS 1,306,546 6/1919 Keeper 182-13 2,506,860 5/1950 Dimon 182-13 2,573,575 10/1951 Keroson 18.2-16

REINALDO P. MACHADO, Primary Examiner.

US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1306546 *Aug 21, 1918Jun 10, 1919 Traveling step-labder
US2506860 *Feb 20, 1947May 9, 1950Samuel DimonTraveling scaffold
US2573575 *Oct 31, 1947Oct 30, 1951George F AndersonPortable extensible lift
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4662476 *Jan 16, 1986May 5, 1987Ross Thomas FPortable scaffold and retrofit kit therefor
US5722506 *Oct 4, 1994Mar 3, 1998Sanritsu Giken Kogyo Kabushiki-KaishaMovable working platform
US5960906 *Apr 20, 1998Oct 5, 1999Henderson; ArlandersFor use on a ground surface
US5967258 *Jun 4, 1997Oct 19, 1999Mobilift Inc.Guardrail assembly
US6863155 *Oct 15, 2002Mar 8, 2005Steven J. WyseMobile scaffolding brake
US7228936Jul 9, 2004Jun 12, 2007Wyse Steven JMobile scaffolding braking system
EP2280038A1 *Feb 27, 2004Feb 2, 2011Battelle Memorial InstitutePolyamide copolymer with protein derivative
WO2010108521A1 *Mar 27, 2009Sep 30, 2010Alfio Leonardo CasanovaMovable modular scaffold system for building works and method to form it
WO2013175151A1 *May 27, 2013Nov 28, 2013M.B.H. DeveloppementMotorized rolling platform in particular for carrying out interior works
U.S. Classification182/13, 182/152, 182/16
International ClassificationE04G1/28, E04G1/00, E04G1/24
Cooperative ClassificationE04G1/24, E04G1/28
European ClassificationE04G1/28, E04G1/24