Drywall bench step

Information

  • Patent Grant
  • 6830129
  • Patent Number
    6,830,129
  • Date Filed
    Thursday, July 15, 1999
    26 years ago
  • Date Issued
    Tuesday, December 14, 2004
    21 years ago
  • Inventors
  • Examiners
    • Chin-Shue; Alvin
    Agents
    • Renner, Kenner, Greive, Bobak, Taylor & Weber
Abstract
A bench step to aid in mounting a bench platform provided by the common drywall bench is provided having a support portion adapted to be fit over a step rail provided by the drywall bench, the support portion being held in place on the step rail by a flange that extends from the support portion. A spacer portion extends from the support portion to distance the support portion from a step portion that extends out from the spacer portion. The step portion is provided with structural support by a step support portion that angles downwardly from the step portion to contact the drywall bench and thereby support the step portion. While the bench platform provided by the common drywall bench is usually accessed by stepping from the floor to a step rail provided by the bench and then subsequently stepping from the step rail to the bench platform, the bench step of the present invention facilitates access to the bench platform by providing, by means of the step portion, an intermediate step between the floor and the step rail. Preferably, to provide structural integrity, the bench step is formed from a single sheet of metal, such as aluminum, with each element of the bench step being formed by means of a bend in the metal.
Description




TECHNICAL FIELD




The present invention generally resides in the art of drywall benches. More particularly, the present invention relates to a step that attaches to a drywall bench so as to provide an intermediate platform that one may utilize to reach the top platform provided by the bench. The step of the present invention also provides the drywall bench on which it is used with a safety feature that substantially lessens the likelihood that the drywall bench will collapse when supporting a load.




BACKGROUND ART




Drywall benches such as those described hereinbelow are commonly employed to aid in the placement of drywall sheets in the ceiling of a room. Referring now to

FIG. 1

, it can be seen that the common drywall bench is designated generally by the numeral


1


. Drywall bench


1


provides an elevated bench platform


2


which is generally of rectangular shape. Folding legs


3




a


,


3




b


,


4




a


,


4




b


are pivotally attached (not shown) to the underside of bench platform


2


near the corners thereof. Support rails


6




a


and


6




b


are respectively connected between pairs of folding legs


3




a


,


3




b


and


4




a


,


4




b


, beneath opposite ends of bench platform


2


. The ends of support rails


6




a


and


6




b


extend beyond folding legs


3




a


,


3




b


,


4




a


,


4




b


and provide brackets


8


that, as can perhaps be best seen in

FIG. 2

, retain rollers


10


by means of an associated pin assembly


12


. A pair of step rails


14




a


,


14




b


receive rollers


10


associated with opposite sides of the bench platform


2


such that step rail


14




a


connects between folding legs


3




a


and


4




a


and step rail


14




b


connects between folding legs


3




b


and


4




b


. Step rails


14




a


and


14




b


each provide a track


16


with which rollers


10


communicate so that associated pairs of folding legs


3




a


,


3




b


and/or


4




a


,


4




b


may be pivoted from an operative position, as shown in

FIG. 1

, to a storage position (not shown) in which folding legs


3




a


,


3




b


and


4




a


,


4




b


are pivoted inwardly and upwardly towards the underside of bench platform


2


. As folding legs


3




a


,


3




b


and


4




a


,


4




b


are pivoted between the operative and storage positions, rollers


10


move along the length of track


16


such that, although step rails


14




a


,


14




b


are supported by support rails


6




a


,


6




b


and their associated rollers


10


, step rails


14




a


,


14




b


do not interfere with the movement of support rails


6




a


,


6




b


and their associated folding legs


3




a


,


3




b


and


4




a


,


4




b.






A pair of locking braces


18




a


,


18




b


are provided between bench platform


2


and folding legs


3




a


,


3




b


and


4




a


,


4




b


, respectively, so that associated pairs of folding legs


3




a


,


3




b


or


4




a


,


4




b


may be locked into the operating position. Unlocking locking brace


18




a


will allow for the pivotal movement of folding legs


3




a


,


3




b


while unlocking locking brace


18




b


will allow for the pivotal movement of folding legs


4




a


,


4




b.






Folding legs


3




a


,


3




b


,


4




a


,


4




b


receive telescoping legs


20


which serve to adjust the height at which bench platform


2


is maintained. To provide access to a common eight foot ceiling, shorter telescoping legs


20


are employed, while longer telescoping legs


20


are employed to provide access to higher ceilings. Folding legs


3




a


,


3




b


,


4




a


,


4




b


provide apertures


22


which allow for the selective height adjustment of telescoping legs


20


. Telescoping legs


20


are also provided with apertures (not shown) such that the apertures on telescoping legs


20


may be placed in registration with apertures


22


on folding legs


3




a


,


3




b


,


4




a


,


4




b


and subsequently locked into place by inserting a bolt or pin mechanism (not shown) through the apertures thus aligned. Various other means for securing telescoping legs


20


to folding legs


3




a


,


3




b


and


4




a


,


4




b


are utilized in the common drywall bench, however, the specific disclosure of such securing means is not pertinent to the disclosure of the present invention.




Drywall bench


1


thus provides a bench platform


2


, the height of which may be adjusted according to the height of the ceiling to which access is desired. Once drywall bench


1


is set to the desired height, the bench platform


2


is reached by first stepping from the floor to step rail


14




a


or


14




b


and subsequently stepping from that step rail


14




a


,


14




b


to bench platform


2


. However, step rail


14




a


,


14




b


is quite narrow and is positioned at a substantial height from the floor, making it very difficult to access bench platform


2


in the manner just described, especially, as is commonly the case, when carrying a large, heavy drywall sheet. The difficulty encountered in accessing step rails


14




a


,


14




b


from the floor has caused many persons that work with the common drywall bench


1


to place a bucket or other supplemental step on the floor so that an intermediate step between the floor and one of step rails


14




a


or


14




b


is provided.




Providing an intermediate step, such as a bucket, while facilitating access to bench platform


2


, creates its own set of problems. First, many devices used as intermediate steps, such as buckets, may provide surfaces that are unsafe to stand upon. They may fail to provide the requisite structural stability, may provide irregularly shaped platforms, or may otherwise be structurally inadequate to serve as a platform to stand upon. Second, these intermediate steps are not in any way attached to the drywall bench


1


and therefore must be properly aligned in relation to the drywall bench


1


whenever the position of the drywall bench


1


is altered. Also, these steps occupy floor space such that they may be tripped over or knocked out of alignment with drywall bench


1


or otherwise present an inconvenience.




Nevertheless, the employment of such intermediate steps has become common practice in the field despite the fact this unsafe practice has caused many personal injuries as well as damage to sheets of drywall, driving up costs and resulting in decreases in productivity. Thus, there exists a need in the art for the addition of an intermediate step to the basic drywall bench that substantially eliminates the problems associated with trying to mount the bench platform.




Other safety concerns are also relevant when considering the design of the drywall benches


1


of the prior art. As mentioned above, folding legs


3




a


,


3




b


and


4




a


,


4




b


are maintained in the operative position by locking braces


18




a


,


18




b


. Thus, if either of the locking braces


18




a


,


18




b


is not properly locked or is accidentally contacted so as to occupy an unlocked position, folding legs


3




a


,


3




b


and/or


4




a


,


4




b


associated with that locking brace


18




a


and/or


18




b


will be able to pivot to the storage position. If one tries to mount the bench platform


2


of drywall bench


1


while either of the locking brakes


18




a


,


18




b


is in an unlocked position, folding legs


3




a


,


3




b


or


4




a


,


4




b


associated with the unlocked locking braces


18




a


or


18




b


will tend to pivot when weight is applied to step rail


14




a


or


14




b


or bench platform


2


, and drywall bench


1


will collapse. Obviously, the collapsing of drywall bench


1


is undesirable due to safety concerns. Moreover, an unlocked brace


18




a


,


186


may allow the bench


10


to simply collapse when being moved, subjecting the user to pinched fingers and hands. It has been found that the provision of a drywall bench step as hereinafter described and claimed, in addition to providing an intermediate step in order to mount the bench platform, also introduces a safety feature into the drywall bench to which it is fitted by substantially eliminating the possibility that the drywall bench will collapse even when both locking braces of the drywall bench are in an unlocked position.




DISCLOSURE OF THE INVENTION




In light of the foregoing, it is an aspect of the present invention to provide a drywall bench step that can be fit onto the common drywall bench.




It is another aspect of the present invention to provide a drywall bench step that is structurally stable so as to be capable of sustaining the heavy loads typically supported by drywall benches.




It is a further aspect of the present invention to provide a drywall bench step that provides a substantially flat surface of substantial size so that one using the drywall bench step is not likely to accidently fall off.




It is yet another aspect of the present invention to provide a drywall bench step that is simple to set up and tear down.




It is an additional aspect of the present invention to provide a drywall bench step that provides an added safety feature by substantially decreasing the possibility of collapse of the drywall bench.




These and other aspect of the present invention which will become apparent from the description which follows are attained by a bench step for a drywall bench having a bench step for a drywall bench having a bench platform, folding legs pivotally connected to the bench platform, support rails connected between the folding legs and including brackets having rollers rotatably received thereon, step rails receiving the rollers and thereby connecting between the support rails such that the folding legs connected to the support rails may be pivoted between operative and storage positions, the rollers being capable of moving within a track provided by the support legs such that the associated support legs and folding legs remain connected as the folding legs are pivoted, locking braces connected between the bench platform and the support rails to selectively lock the folding legs into the operative position, and telescoping legs selectively received by the folding legs, the step comprising: a support portion adapted to be received by at least a portion of one of the step rails; a spacer portion extending downwardly from said support portion; a step portion extending from said spacer portion such that said step portion lies substantially parallel to the bench platform when the bench step is placed on one of the step rails of the drywall bench.




Other aspects of the invention are attained by the improvement in a drywall bench having a bench platform, folding legs pivotally connected to the bench platform, support rails connected between the folding legs and including brackets having rollers rotatably received thereon, step rails receiving the rollers and thereby connecting between the support rails such that the folding legs connected to the support rails may be pivoted between operative and storage positions, the rollers being capable of moving within a track provided by the support legs such that the associated support legs and folding legs remain connected as the folding legs are pivoted, locking braces connected between the bench platform and the support rails to selectively lock the folding legs into the operative position, and telescoping legs selectively received by the folding legs, the improvement comprising: a support portion adapted to be received by at least a portion of one of the step rails, a spacer portion extending downwardly from said support portion, and step portion extending from said spacer portion such that said step portion lies substantially parallel to the bench platform.




A preferred exemplary drywall bench step incorporating the concepts of the present invention is shown by way of example in the accompanying drawings without attempting to show all the various forms and modifications in which the invention might be embodied, the invention being measured by the appended claims and not by the details of the specification.











DESCRIPTION OF THE DRAWINGS




For a complete understanding of the objects, techniques and structure of the invention reference should be made to the following detailed description and accompanying drawings wherein:





FIG. 1

is a perspective view of a drywall bench of the prior art;





FIG. 2

is a cross sectional view of a portion of the drywall bench of

FIG. 1

taken along the line


2





2


;





FIG. 3

is a perspective view of the drywall bench step of the present invention;





FIG. 4

is a front view of a drywall bench having the drywall bench step of the present invention affixed thereto;





FIG. 5

is a side view of a drywall bench having the drywall bench step of the present invention affixed thereto;





FIG. 6

is a cross sectional view taken along the line


6





6


of

FIG. 5

, showing how the drywall bench step of the present invention attaches to the common drywall bench; and





FIG. 7

is a cross sectional view taken along the line


7





7


of

FIG. 5

, showing how the drywall bench step of the present invention attaches to the common drywall benches.











PREFERRED EMBODIMENT OF THE INVENTION




Referring now to

FIG. 3

, it can be seen that the drywall bench step of the present invention is designated generally by the numeral


30


. While the bench


30


is described herein as a drywall bench, indicating that its use might be limited to installing drywall, it will be appreciated that the concept and structure of the invention is adaptable to benches of various types and uses, and the term “drywall bench” is not intended as limiting. Bench step


30


is preferably constructed from a single sheet of metal or other suitable material. Constructing bench step


30


from a single piece of metal is preferred because each bend placed on a single piece of metal to form the bench step


30


increases the structural integrity of bench step


30


such that its strength is more than adequate for the use to which it is to be employed. Most preferably, bench step


20


is preferably constructed from ⅛th inch thick aluminum having lugs


31


serving to increase the foot grip one can maintain on bench step


30


when bench step


30


is employed as hereinafter disclosed. However, bench step


30


may be constructed from multiple sheets of metal or other suitable materials, with or without lugs


31


, and such constructions are deemed within the scope of the present invention. Bench step


30


provides a support portion


32


that is designed to communicate with a step rail


14




a


,


14




b


on the common drywall bench


1


, discussed above under Background Art. Referring now to

FIGS. 4-7

, it can be seen that, in the preferred embodiment of bench step


30


, support portion


32


fits over step rail


14


and is held in place by flange


34


. However, bench step


30


could be designed to communicate with a step rail


14




a


,


14




b


in alternative ways and therefore, the present invention should not be limited to any particular means of attachment to the common drywall bench


1


. Likewise, support portion


32


should not be limited to the particular embodiment shown in the drawings, although it is desired that support portion


32


communicates with a step rail. Preferably, flange


34


is formed by placing bend


35


in the single sheet of metal forming bench step


30


. As is perhaps best seen in

FIGS. 5-7

, flange


34


does not extend down from along the entire length of support portion


32


but is rather cut out, at the ends, in the area of brackets


8


, on drywall bench


1


, so that brackets


8


do not interfere with the placement of bench step


30


on step rail


14


. Because flange


34


fits adjacent to brackets


8


, placing bench step


30


on drywall bench


1


prevents folding legs


3




a


,


3




b


and


4




a


,


4




b


from being capable of folding into a storage position because, as rollers


10


begin to traverse track


16


as folding legs


3




a


,


3




b


and


4




a


,


4




b


pivot toward bench platform


2


, brackets


8


come into contact with flange


34


and flange


34


becomes wedged between brackets


8


preventing further pivotal movement of folding legs


3




a


,


3




b


and


4




a


,


4




b


. It has been found that this feature of flange


34


is desirable in that it acts as a safety catch or bar for drywall bench


1


. If one or both of locking braces


18




a


,


18




b


are accidently caused to occupy an unlocked position, drywall bench


1


would normally collapse as one attempts to mount bench platform


2


because, as weight is applied to bench platform


2


, the folding legs


3




a


,


3




b


or


4




a


,


4




b


associated with the unlocked locking brace


18




a


or


18




b


will pivot under that weight, causing drywall bench


1


to collapse. However, as mentioned above, when bench step


30


is mounted on either step rail


14




a


or


14




b


, folding legs


3




a


,


3




b


and


4




a


,


4




b


may only pivot until flange


34


becomes wedged between brackets


8


at opposite ends of the bench. This prevents drywall bench


1


from collapsing even when both locking brackets


18




a


,


18




b


are in an unlocked position. In other words, when the bench step


30


is received on either step rail


14




a


or


14




b


, the flange


34


serves as a spacer between the brackets


8


at opposite ends of the flange, preventing rotation of the associated leg pairs


3




a


,


4




a


and


3




b


,


4




b


any closer to each other than the length of the flange


34


.




Of course, the ability of flange


34


to function as a safety catch for drywall bench


1


depends upon the proximity of brackets


8


to flange


34


when bench step


30


is mounted on drywall bench


1


. If flange


34


is not in close proximity to bracket


8


, folding legs


3




a


,


3




b


or


4




a


,


4




b


may be capable of pivoting to an unstable position before their progress is stopped by the wedging of flange


34


between brackets


8


. Thus, it is preferred that flange


34


be constructed so as to lie in close proximity (generally within about an inch) to each of the brackets


8


upon step rail


14




a


or


14




b


to which bench step


30


is mounted.




Opposite flange


34


, spacer portion


36


extends from support portion


32


at bend


38


. Of course, it should be realized that bench step


30


could communicate with a step rail


14




a


,


14




b


without the need for support portion


32


and flange


34


by, for example, directly fastening the top edge of spacer portion


36


to a step rail


14




a


,


14




b


by means of screws or other fasteners. In such a configuration, the top edge or face of spacer portion


36


would be the support portion of the bench step. However, support portion


32


and flange


34


are preferred because they allow bench step


30


to be selectively placed on and removed from drywall bench


1


. Step portion


40


extends from spacer portion


36


and is preferably formed by bend


42


in a single sheet of metal forming bench step


30


. Step portion


40


provides an intermediate step by which bench platform


2


may be reached. Therefore, step portion


40


preferably extends from spacer portion


36


at an angle such that step portion


40


lies in the horizontal plane, parallel to bench platform


2


.




Although a bench step


30


providing only the structural elements recited hereinabove can adequately perform its intended function, structural support preferably is added to step portion


40


by step support portion


44


. Step support portion


44


is preferably formed by placing bend


46


in a single sheet of metal, forming bench step


30


. Step support portion


44


is angled downwardly from step portion


40


to contact telescoping legs


20


at a position below step portion


40


. Preferably, the portions of step support portion


44


contacting telescoping legs


20


are covered by a rubber sleeve or guard


48


so as to protect the telescoping legs


20


and the step support portion


44


from the wear and tear that may otherwise occur if they were permitted to directly contact each other.




From the figures and descriptions disclosed hereinabove, it should be readily apparent that bench step


30


provides an intermediate step to the basic drywall bench and substantially eliminates the problems associated with trying to mount the bench platform. To mount bench platform


2


, one simply steps from the floor to step portion


40


and then subsequently from step portion


40


to support portion


32


fitted over step rail


14




a


,


14




b


. A final step from support portion


32


to bench platform


2


finishes the task. The distance one must step from support portion


32


to bench platform


2


remains substantially identical to the distance one was required to step from step rail


14


to bench platform


2


when using the drywall bench


1


of the prior art. However, when using bench step


30


in conjunction with prior art drywall bench


1


, one no longer has to step directly from the floor to step rail


14


in order to mount bench platform


2


, because an intermediate step is provided by step portion


40


. It should be readily apparent that the distance one must step from the floor to step portion


40


is dependent upon the height of spacer portion


36


as well as the length of telescoping legs


20


. The distance one must step from step portion


40


to support portion


32


is dictated solely by the height of spacer portion


36


. It should be readily apparent that, for different applications requiring a higher or lower bench platform


2


, the dimensions of bench step


30


may be altered so as to provide a more convenient intermediate step by means of step portion


40


. Similarly, the width of step portion


40


may be altered to provide greater or lesser support area; however, it is preferred that the width of step portion


40


is such that when two bench steps


30


are placed on the common drywall bench


1


, one on each step rail


14




a


,


14




b


, the combination will still be capable of fitting through a doorway of common width, making the drywall bench


1


with attached bench steps


30


highly portable at a work site.




Thus it can be seen that the objects of the invention have been satisfied by the structure presented above. While in accordance with the patent statutes only the best mode and preferred embodiment of the invention has been presented and described in detail, it will be understood that the invention is not limited thereto or thereby. Accordingly, for an appreciation of the true scope and breadth of the invention reference should be made to the following claims.



Claims
  • 1. In combination a bench step and a drywall bench, said drywall bench comprising a bench platform; folding legs connected to said bench platform; and a step rail connected to said folding legs such that said folding legs may be pivoted between operative and storage positions, said bench step comprising:a support portion removably received by at least a portion of said step rail and including at least one flange, said support portion and said at least one flange allowing the bench step to be selectively placed on or removed from the drywall bench; a spacer portion extending downwardly from said support portion; and a step portion extending from said spacer portion such that said step portion lies substantially parallel to said bench platform when the bench step is placed on said step rail of the drywall bench; wherein said at least one flange fits over said step rail such that said folding legs associated with said step rail are unable to pivot to the storage position because the movement of said folding legs is impeded by said at least one flange.
  • 2. The combination according to claim 1 wherein said support portion, said spacer portion, said step portion, are integrally formed from a single piece of metal.
  • 3. The combination according to claim 2 wherein said single piece of metal is a sheet of eighth inch thick aluminum.
  • 4. In a drywall bench having a bench platform, folding legs pivotally connected to the bench platform, support rails connected between the folding legs and including brackets having rollers rotatably received thereon, step rails receiving the rollers and thereby connecting between the support rails such that the folding legs connected to the support rails may be pivoted between operative and storage positions, the rollers being capable of moving within a track provided by the step rails such that the associated support rails and folding legs remain connected as the folding legs are pivoted, locking braces connected between the bench platform and the support rails to selectively lock the folding legs into the operative position, and telescoping legs selectively received by the folding legs, the improvement comprising:a support member including at least one flange; a spacer member extending downwardly from said support member; and a step member extending from said spacer member such that said step member lies substantially parallel to the bench platform; wherein said at least one flange fits over one of the step rails such that said support portion and said at least one flange can be selectively placed on or removed from a step rail on the drywall bench and wherein said at least one flange fits over one of the step rails, in close juxtaposition to one of the brackets provided by the support rail, such that the folding legs associated with the support rail are unable to pivot to the storage position because movement of the rollers associated with the bracket is impeded as the bracket contacts said at least one flange.
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Number Name Date Kind
257463 Boyd May 1882 A
2581027 Keest Jan 1952 A
3404751 Nosworthy Oct 1968 A
3930562 Zorn Jan 1976 A
4222136 Valentino Sep 1980 A
4405141 Jurek Sep 1983 A
4605098 Leuty Aug 1986 A
4782916 Hays Nov 1988 A
4911264 McCafferty Mar 1990 A
5799961 Schmeets Sep 1998 A
Foreign Referenced Citations (3)
Number Date Country
127182 Aug 1928 CH
240 7330 Jun 1979 FR
500655 Nov 1954 IT