Granted Patent B2

US 12,497,789 · App. 17/681,076 · Granted Dec 16, 2025

Inventors: Fang Chen (Shanghai, CH); Liang He (Shanghai, CH); Ling Zhu (Shanghai, CH)

Assignee: Werner Co.

E04G1/30E06C1/393E04G2001/305

Abstract

Claims (40)

1 . A work platform comprising:

a plank extending longitudinally and having a first end and a second end;

a first leg assembly rotatably attached to the first end of the plank, the first leg assembly having a first rail and a second rail and a first rung attached to the first rail and the second rail, wherein the first leg assembly is rotatable about a first hinge;

a second leg assembly rotatably attached to the second end of the plank, the second leg assembly having a third rail and a fourth rail and a second rung attached to the third rail and the fourth rail, wherein the second leg assembly is rotatable about a second hinge; and

a hook assembly and a latch assembly,

wherein the hook assembly includes a hook crossbar slidably coupled to the plank adjacent the first end, the hook assembly slides between a use position where the hook crossbar extends beyond a perimeter of the plank between the first rail and the second rail of the first leg assembly and a stowed position where the hook crossbar is retracted below and within the perimeter of the plank, and

wherein the latch assembly includes latch hooks coupled to the plank adjacent the second end.

2 . The work platform of claim 1 wherein the hook assembly further comprises a first hook and a second hook that are attached to the hook crossbar, which extends between the first hook and the second hook.

3 . The work platform of claim 2 wherein the hook assembly further comprises a first track and a second track attached to an underside of the work platform.

4 . The work platform of claim 3 wherein the hook assembly further comprises a cross plate attached adjacent to and extending between a rear end of the first hook and the second hook.

5 . The work platform of claim 4 wherein the hook assembly further comprises a first block and a second block attached to the cross plate, the first block and the second block slidably coupled to the first track and the second track, respectively.

6 . The work platform of claim 1 wherein the work platform is configured to lock onto a second work platform via the hook assembly and a second latch assembly of the second work platform.

7 . The work platform of claim 6 wherein the hook crossbar is configured to couple the second latch assembly of the second work platform via second latch assembly hooks.

8 . The work platform of claim 1 wherein the hook assembly includes a first notch and a second notch.

9 . The work platform of claim 1 wherein the work platform includes a first track and a second track, in parallel with the first track, to which the hook assembly is slidably coupled such that the hook assembly is slidable between the use position, where the hook crossbar extends beyond the work platform, and the stowed position, where the hook crossbar is retracted under the work platform.

10 . The work platform of claim 1 wherein the first leg assembly and the second leg assembly are independently rotatable between an open position and a folded position.

11 . The work platform of claim 10 wherein the first leg assembly and the second leg assembly are disposed substantially parallel to a top surface of the work platform when the first leg assembly and the second leg assembly are disposed in the folded position.

12 . The work platform of claim 1 wherein the first leg assembly and the second leg assembly are extendable between an extended state and a retracted state, wherein a length of the first rail and the second rail is greater in the extended state than in the retracted state and a length of the third rail and the fourth rail is greater in the extended state than the retracted state.

13 . The work platform of claim 12 wherein the first leg assembly and the second leg assembly are extendable at different lengths and rotatable at different angles.

14 . The work platform of claim 1 wherein the work platform is configured to lock onto a second work platform via the latch assembly and a second hook assembly of the second work platform.

15 . A work platform comprising:

a plank extending longitudinally and having a first end and a second end;

a first leg assembly rotatably attached to the first end of the plank, the first leg assembly having a first rail, a second rail, and a first rung therebetween, wherein the first leg assembly is rotatable about a first hinge;

a second leg assembly rotatably attached to the second end of the plank, the second leg assembly having a third rail, a fourth rail, and a second rung therebetween, wherein the second leg assembly is rotatable about a second hinge; and

a hook assembly disposed adjacent the first end of the plank and a latch assembly disposed adjacent the second end of the plank,

wherein the hook assembly includes a cross plate, a hook crossbar, and a first hook and a second hook extending between the cross plate and the hook crossbar, wherein the hook assembly is slidably coupled to the plank between a use position where the hook crossbar extends beyond a perimeter of the plank between the first rail and the second rail of the first leg assembly and a stowed position where the hook crossbar is retracted below and within the perimeter of the plank.

16 . The work platform of claim 15 wherein the latch assembly includes latch hooks coupled to the plank adjacent the second end, and

wherein the hook assembly includes a first notch in the first hook and a second notch in the second hook, the first notch and the second notch being configured to engage with a portion of a second latch assembly of a second work platform.

17 . The work platform of claim 16 wherein the work platform includes a first track and a second track on an underside of the plank, wherein the hook assembly has a first block and a second block that are slidably coupled with the first track and the second track, respectively.

18 . A work platform comprising:

a plank extending longitudinally and having a first end and a second end;

a first leg assembly rotatably attached to the first end of the plank about a first hinge, the first leg assembly having a first rail, a second rail, and a first rung therebetween;

a second leg assembly rotatably attached to the second end of the plank about a second hinge, the second leg assembly having a third rail, a fourth rail, and a second rung therebetween; and

a hook assembly disposed adjacent the first end of the plank and a latch assembly disposed adjacent the second end of the plank,

wherein the hook assembly includes a cross plate, a hook crossbar, a first hook and a second hook extending between the cross plate and the hook crossbar, and a first block and a second block extending from the cross plate, wherein the hook assembly is slidably coupled to the plank, and

wherein the work platform includes a first track and a second track in parallel and spaced relation with the first track and the first block of the hook assembly is slidably coupled with the first track and the second block of the hook assembly is slidably coupled with the second track such that the hook assembly is slidably coupled with the first track and the second track between a use position, where the hook crossbar extends beyond the work platform, and a stowed position, where the hook crossbar is retracted under the work platform.

19 . The work platform of claim 18 wherein the first hook includes a first notch and the second hook includes a second notch.

20 . The work platform of claim 19 wherein the first notch and the second notch are configured to engage with a portion of a second latch assembly of a second work platform,

wherein the first leg assembly and the second leg assembly are extendable between an extended state and a retracted state, and

wherein the first leg assembly and the second leg assembly are extendable at different lengths and rotatable at different angles relative to the plank.

Assignments (9)

Continuity (2)

References Cited (126)