Interlocking work platform system and method

Abstract

A work platform system having a first work platform. The system having a first bracket attached to the first scaffold and extending below and outward beyond the first scaffold between the first rail and the second rail of the first leg assembly. The system having a second bracket attached to the first scaffold and extending below and outward beyond the first scaffold between the first rail and the second rail of the first leg assembly. The system having a second work platform. The first end of the second scaffold is disposed on the first bracket and the second bracket with the first bracket and the second bracket extending between the first rung of the third leg assembly and the second scaffold. A method for using a work platform system.

Claims

1. A work platform system comprising: a first work platform comprising: a first scaffold having a first end and a second end and a plane upon which a user can stand; a first leg assembly rotatably attached with bolts to the first end of the first scaffold having a first rail and a second rail and a rung attached to the first rail and the second rail, the first leg assembly in a folded position relative to the first scaffold and essentially in parallel the plane of the first scaffold; a second leg assembly rotatably attached with bolts to the second end of the first scaffold, the second leg assembly in an open position relative to the first scaffold and essentially perpendicular to the plane of the first scaffold; a first bracket attached to the first scaffold and extending below and outward beyond the first scaffold between the first rail and the second rail of the first leg assembly, the first scaffold has a first crossbar disposed under the first scaffold along a length of the first scaffold and a second crossbar disposed under the first scaffold along a length of the first scaffold in parallel and spaced relation with the first crossbar; and a second bracket attached to the first scaffold and extending below and outward beyond the first scaffold between the first rail and the second rail of the first leg assembly, the first bracket bolted to the first crossbar and the second bracket bolted to the second crossbar, the first bracket has a first portion which is somewhat rectangularly shaped and has a bolthole through which a bolt extends to bolt the first bracket to the first crossbar, a second portion which is somewhat rectangularly shaped and extends downward at an angle between 20° and 70° from the first portion, and a third portion that is somewhat rectangularly shaped that extends from the second portion essentially in parallel with the first portion.

2. The system of claim 1 wherein the third portion has a free end that flares outward.

3. A method for using a work platform system comprising the steps of: putting a first leg assembly of a first work platform in a folded positioned essentially in parallel with a first scaffold of the first work platform; putting a second leg assembly of the first work platform in an open position essentially perpendicular to the first scaffold; inserting a first bracket and a second bracket extending from a first side of the first scaffold between a rung of a third leg assembly of a second work platform and a second scaffold of the second work platform while the third leg assembly is in a partially open position, which is between a folded position where the third leg assembly is essentially in parallel with the second scaffold and an open position where the third leg assembly is essentially perpendicular with the second scaffold; moving the third leg assembly with the first and second brackets between the rung of the third leg assembly and the second scaffold into the open position to lock the first and second brackets to the second work platform; and positioning the first and second work platforms which are locked together at a desired location so the first and second work platforms rest on the second leg assembly of the first work platform and the third leg assembly and a fourth leg assembly of the second work platform but not the first leg assembly.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) In the accompanying drawings, the preferred embodiment of the invention and preferred methods of practicing the invention are illustrated in which:

(2) FIG. 1 is a perspective view of an interlocking work platform system with a first work platform locked to a second work platform of the present invention.

(3) FIG. 2 is a perspective view of the first work platform.

(4) FIG. 3 is an underside view of the first work platform in a folded position.

(5) FIG. 4 is a side view of the first bracket and the open position.

(6) FIG. 5 is a perspective view of the first bracket.

(7) FIG. 6 is a perspective view of the first bracket.

(8) FIG. 7 is a side view of the first work platform.

(9) FIGS. 8A-8C depict the method of the present invention.

(10) FIG. 9 is an underside view of the first work platform in the folded position with the first and second brackets in the transport position.

(11) FIG. 10 is an underside perspective view of the first work platform in the open position with the first and second brackets in the transport position

(12) FIG. 11 is a side view of the first bracket.

(13) FIG. 12 is an underside perspective view of the system ready for use with respect to the second scaffold.

(14) FIG. 13 is an exploded view of section A of FIG. 12.

(15) FIG. 14 is an underside perspective view of the system ready for use with respect to the first scaffold.

(16) FIG. 15 is an exploded view of section B of FIG. 14.

DETAILED DESCRIPTION OF THE INVENTION

(17) Referring now to the drawings wherein like reference numerals refer to similar or identical parts throughout the several views, and more specifically to FIGS. 1-3 thereof, there is shown a work platform system 10. The system 10 comprises a first work platform 12 comprising a first scaffold 14 having a first end 16 and a second end 18 and a plane 20 upon which a user can stand. The first work platform 12 comprises a first leg assembly 22 rotatably attached with rivets 24 to the first end 16 of the first scaffold 14 having a first rail 26 and a second rail 28 and a rung 30 attached to the first rail 26 and the second rail 28. The first leg assembly 22 in a folded position relative to the first scaffold 14 and essentially in parallel with the plane 20 of the first scaffold 14. The first work platform 12 comprises a second leg assembly 32 rotatably attached with rivets 24 to the second end 18 of the first scaffold 14. The second leg assembly 32 is in an open position relative to the first scaffold 14 and essentially perpendicular to the plane 20 of the first scaffold 14.

(18) The system 10 comprises a first bracket 34 attached to the first scaffold 14 and extending below and outward beyond the first scaffold 14 between the first rail 26 and the second rail 28 of the first leg assembly 22. The system 10 comprises a second bracket 36 attached to the first scaffold 14 and extending below and outward beyond the first scaffold 14 between the first rail 26 and the second rail 28 of the first leg assembly 22. The brackets may be made out of steel or aluminum.

(19) The system 10 comprises a second work platform 38. The second work platform 38 comprises: a second scaffold 40 having a first end 16 and a second end 18 and a plane 20 upon which the user can stand; the second work platform 38 comprises a third leg assembly 42 rotatably attached with rivets 24 to the first end 16 of the second scaffold 40 having a first rail 26 and a second rail 28 and a rung 30 attached to the first rail 26 and the second rail 28 of the third leg assembly 42. The third leg assembly 42 is in an open position relative to the second scaffold 40 and essentially perpendicular to the plane 20 of the second scaffold 40.

(20) The first end 16 of the second scaffold 40 is disposed on the first bracket 34 and the second bracket 36 with the first bracket 34 and the second bracket 36 extending between the first rung 30 of the third leg assembly 42 and the second scaffold 40. The first bracket 34 and the second bracket 36 are disposed on the first rung 30 of the third leg assembly 42. The first work platform 12 is locked to the second work platform 38 through the first and second brackets 34, 36 engaging with the second scaffold 40 and the rung 30 of the third leg assembly 42. The second work platform 38 comprises a fourth leg assembly 44 rotatably attached with rivets 24 to the second end 18 of the second scaffold 40. The second leg assembly 32 of the second scaffold 40 is in an open position relative to the second scaffold 40 and essentially perpendicular to the plane 20 of the second scaffold 40. No pins or bands or any additional components may be used to lock the first work platform 12 with the second work platform 38. The first scaffold 14 has a first crossbar 46 disposed under the first scaffold 14 along a length of the first scaffold 14 and a second crossbar disposed under the first scaffold 14 along a length of the first scaffold 14 in parallel and spaced relation with the first crossbar 46. The first bracket 34 may be bolted to the first crossbar 46 and the second bracket 36 may be bolted to the second crossbar.

(21) The first bracket 34 may have a first portion 48, as shown in FIGS. 4, 5 and 6, which is somewhat rectangularly shaped and has a bolthole 50 through which a bolt 29 extends to bolt the first bracket 34 to the first crossbar 46, a second portion 52 which is somewhat rectangularly shaped and extends downward at an angle between 20° and 70° from the first portion 48, and a third portion 54 that is somewhat rectangularly shaped that extends from the second portion 52 essentially in parallel with the first portion 48. The third portion 54 extends between the rung 30 of the third leg assembly 42 and the second scaffold 40 and is disposed on the rung 30 of the third leg assembly 42 and on which the first end 16 of the second scaffold 40 is disposed.

(22) The third portion 54 has a free end 56 that flares outward. By flaring outward, hooks 60 are defined, which facilitates the locking of the first work platform 12 with the second work platform 38 and serves to make it difficult for the first work platform 12 to separate from the second work platform 38 before they are locked together. On the top surface of the third portion 54 there is a notch 58, as shown in FIG. 6, that is of a size that is slightly larger than the width of the first end 16 of the second scaffold 40, so the first end 16 of the second scaffold 40 fits into the notch 58, and is then properly aligned.

(23) With reference to FIG. 8, the present invention pertains to a method for using a work platform system 10. The method comprises the steps of putting a first leg assembly 22 of a first work platform 12 and a folded positioned essentially in parallel with a first scaffold 14 of the first work platform 12. There is the step of putting a second leg assembly 32 of the first work platform 12 in an open position essentially perpendicular to the first scaffold 14. There is the step of inserting a first bracket 34 and a second bracket 36 extending from a first side of the first scaffold 14 between a rung 30 of a third leg assembly 42 of a second work platform 38 and a second scaffold 40 of the second work platform 38 while the third leg assembly 42 is in a partially open position, which is between a folded position where the third leg assembly 42 is essentially in parallel with the second scaffold 40 and an open position where the third leg assembly 42 is essentially perpendicular with the second scaffold 40. There is the step of moving the third leg assembly 42 with the first and second brackets 34, 36 between the rung 30 of the third leg assembly 42 and the second scaffold 40 into the open position to lock the first and second brackets 34, 36 to the second work platform 38. There is the step of positioning the first and second work platforms 12, 38 which are locked together at a desired location so the first and second work platforms 12, 38 rest on the second leg assembly 32 of the first work platform 12 and the third leg assembly 42 and a fourth leg assembly 44 of the second work platform 38 but not the first leg assembly 22.

(24) By the third leg assembly 42 being in a partially open position, better enables the brackets to be placed between the rung 30 of the third ladder assembly and the first end 16 of the second scaffold 40. The brackets have more area to fit between the space when the third leg assembly 42 is in the partially open position. Once the brackets are properly positioned, the third ladder assembly is moved to the open position, effectively limiting movement of the brackets by the brackets being held tightly because the top rung 30, of the third leg assembly 42 and the first end 16 of the second scaffold 40 press against them to squeeze them or otherwise hold them in place with a positive force generated from the top rung 30 pushing the brackets against the first and 16 of the second scaffold 40, as shown in FIGS. 12-15. The third, fourth and second assemblies are then locked into their open position. Once the work platforms are in the open position, they are locked into the open position for use by moving the plunger-spring lock assembly 39, as shown in FIG. 7, into the locked position. The plunger-spring lock assembly 39 is well known in the art for locking work platforms in the open position.

(25) The dimensions of the preferred embodiment of the first work platform 12 are shown in the figures. The first work platform supports at least 250 lbs. and preferably at least 500 lbs. without failure.

(26) As shown in FIGS. 9 and 10, the brackets can be unbolted and turned around and then re-bolted to the crossbars in the transfer position so the brackets are now facing inwards, and not extending out beyond the first and 16 of the first scaffold 14. In this way, when the first work platform 12 has both of its leg assemblies in the folded position, as shown in FIG. 9, the brackets will not extend to possibly strike an object while being transported to another location. Similarly, as shown in FIG. 10, where the leg assemblies of the first work platform 12 are in the open position, the brackets are in the transfer position so they do not extend out in a user could possibly bump into them or strike them with an object.

(27) The first scaffold 14 may be between 3 ft. and 6 ft. and preferably 4 ft. in length; may be between 15 inches and 40 inches high and preferably about 21 inches high; and may be between 15 inches and 25 inches wide and preferably about 16 inches wide. Each bracket may be between 0.175 and 0.4 inches wide and preferably about 0.23 inches wide; may be between 7 inches and 17 inches long and preferably about 10 inches long; and may be between 0.7 inches and 3 inches wide and preferable about 1-1.5 inches wide.

(28) Although the invention has been described in detail in the foregoing embodiments for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be described by the following claims.