# US 4,392,563 A · Brake mechanism for material handling system

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- Number: US 4,392,563 A
- Document ID: US4392563A
- Status: Granted
- Kind: A
- Application number: 06/321,182
- Filed: 1981-11-16
- Granted: 1983-07-12
- Earliest claimed: 1980-03-31
- Inventors: Lee Holman
- Web page: https://patentgrep.com/patent/US4392563A

## CPC

- B60P 3/16: for carrying mixed concrete, e.g. having rotatable drums {(concrete-mixing apparatus specially adapted for being mounted on vehicles with provision for mixing during transport B28C5/42)}
- B28C 5/4244: {Discharging; Concrete conveyor means, chutes or spouts therefor (in general B28C7/168)}
- B65G 11/186: {for bulk}
- B60P: VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS (vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances A61G3/00)
- B28C: PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER (preparing material for foundry moulds B22C5/00)
- B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D)

## Abstract

A brake primarily for use with a cement dispensing system such as those attached to the rear of a cement truck. A dispensing chute receives material from the tube connecting with the drum and is mounted to swing through an arc for carrying the cement away from the truck. The brake comprises an annular flange mounted concentric with the dispensing tube and a cooperating brake having shoes for gripping the flange. By fixing the flange to either the tube or the chute and the brake to the other member, actuation of the brake will stop and hold the chute in a selected radial position. The brake functions better than prior art devices because the flange in being positioned around the tube, provides a substantial lever arm for allowing the brake to stop and hold the chute.

## Claims

### Claim 1

An unloading system for a cement carrying truck wherein cement is carried in a drum and emptied therefrom through a rear opening, said unloading system comprising:
a dispensing funnel supported on said trunk and comprising a vertically extending cylindrical section positioned to receive and transport cement from said drum rear opening;
an elongated chute for carrying cement from said funnel;
means supporting one end of said chute in a position to receive cement from said funnel with the chute being rotatable in a generally horizontal plane about the cylindrical section of said funnel and to the rear of said truck; and
energizeable brake means for locking said chute in any of said positions about said funnel cylindrical section comprising;
a flange fixed to said chute and extending partially around and normal to said funnel cylindrical section to move around said funnel with said chute as it is rotated; and
brake mechanism fixed to said funnel and including clamping means to squeeze said flange when said brake mechanism is energized thereby stopping and holding said chute in any selected horizontal position to which it is rotated.