Breaking arrangement for elevating work platform

• US 6,082,506 A
• Filed: 06/29/1998
• Issued: 07/04/2000
• Est. Priority Date: 06/29/1998
• Status: Expired due to Fees

• Current Assignee: Ching Huan Chen, Pei Kai Huang, Pei Ping Huang
• Original Assignee: Ching Huan Chen, Pei Kai Huang, Pei Ping Huang
• Inventors: Chen, Ching Huan, Huang, Pei Ping, Huang, Pei Kai
• Primary Examiner(s): Oberteiter, Robert
• Assistant Examiner(s): SY, MARIANO ONG
• Application Number:
  US09/106,322
• Time in Patent Office: 736 Days
• Field of Search: 188/41, 188/43, 188/44, 188/180, 188/188, 188/189, 188/135, 188/136, 188/139, 188/82.1, 188/82.8, 188/82.84, 188/65.1, 188/343, 187/372, 187/376, 187/350, 187/351
• US Class Current: 188/189
• CPC Class Codes: B66D 5/16 for action on ropes or cables
• CPC Class Codes: F16D 2127/10 having wedging elements
• CPC Class Codes: F16D 63/008 Brakes acting on a linearly moving member
• CPC Class Codes: F16D 65/028 Rollers

Abstract

A breaking arrangement for elevating work platform includes a break body, a C-shaped receiving piece, a breaking unit, and a break released handle. The breaking arrangement allows only upward movement of the elevating work platform during normal operation, the construction workers can move downward after a break released handle is released. The breaking arrangement can further provided an emergency stop when failure occur in the main suspension cable or the winding machine, so that the elevating work platform would not slide down.

Claims

1. A braking arrangement for elevating work platform, comprising

a brake body, a C-shaped receiving piece, a braking unit, and a brake released handle,

wherein said brake body comprises a top surface, a bottom surface, a front surface, a rear surface, a first side surface, and a second side surface form six surfaces of said brake body;

said brake body having a gain passing through from said top surface to said bottom surface with a narrower top portion near said top surface, and a wider bottom portion near said bottom surface;

said gain is limited and defined by a front wall parallel to said front surface of said brake body, a rear wall parallel to said front wall, a vertical wall parallel to said first side surface of said brake body, and an inclined wall disposed oppositely to said vertical wall;

said front wall and said rear wall each respectively provided a front slide way and a rear slide way parallel to said inclined wall;

said front surface of said brake body having an opening for providing an access to said gain;

said brake body further having a counter bore penetrates through said first side surface of said brake body until said vertical wall of said gain;

said C-shaped receiving piece having a screw hole in aligned with said counter bore of said brake body on said first side surface, and a C-shaped groove facing said inclined wall of said brake body when said C-shaped receiving piece is affixed on said vertical wall within said gain of said brake body through a counter sunk bolt penetrating through said counter bore to be screwed on said screw hole of said C-shaped receiving piece;

said braking unit comprises a brake mount having a width slightly smaller than a distance between said front wall and said rear wall of said gain of said brake body, two roller support stands having an axial hole at each of said roller support stands respectively, are parallelly and integrally extended from a first end of said brake mount, a roller having a coarse surface is pivotally mounted between two roller support stands by a pivot axle penetrating through said axial hole of said roller support stands and said roller, and a fulcrum bar integrally extended from a second end of said brake mount, wherein said pivot axle has a length that is longer than a distance between two parallel roller support stands, a protruded portion of said pivot axle is rotatably mounted in said front slide way and said rear slide way of said gain of said brake body, so that said roller is able to rotate on said inclined wall of said gain;

said brake released handle has a front end pivotally connected to said fulcrum bar of said braking unit, a middle portion pivotally mounted on said elevating work platform;

during normal operation of said elevating work platform, said brake released handle is pushed upward which control said fulcrum bar to also push upward, so that said elevating work platform is only able to move upwardly;

when the construction worker released said brake released handle from a rear end of said brake released handle, said fulcrum bar is turned down so that said braking unit is released and said elevating work platform can safely move downwardly.