Browse Prior Art Database

Self Propelled Pallet

IP.com Disclosure Number: IPCOM000090218D
Original Publication Date: 1969-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

LaBeau, R: AUTHOR [+3]

Abstract

This self-propelled pallet carries work from station to station in a serial production line system. These two hydraulic drive systems provide smooth acceleration and deceleration not possible with electric motor or chain drives.

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Self Propelled Pallet

This self-propelled pallet carries work from station to station in a serial production line system. These two hydraulic drive systems provide smooth acceleration and deceleration not possible with electric motor or chain drives.

Pallet 9, of any convenient configuration, is propelled by motor 1 driving pinion 8 on fixed gear rack 7. The energy required to drive hydraulic motor 1 is obtained from a hydraulic fluid stored in accumulator 3 under high pressure. In the drive mode, shown by open arrow heads, fluid from accumulator 3 is passed through pressure regulator 6, drive motor 1, and control valve 5 to be held in reservoir 2. In the system on the left, when the pallet comes to rest at a work station, pinion 8 is disengaged from rack 7. A drive unit, not shown, operates motor 1 as a pump to return the hydraulic fluid to accumulator 3, shown by solid arrow heads, through one-way check valves 4 bypassing regulators 5 and 6.

In the system on the right, the hydraulic fluid is returned to accumulator 3 by application of a mechanical force F to piston 10 in reservoir 2. Valve 4 in this system allows the returning fluid to bypass motor 1 when the system is being recharged. Pressure regulators 5 and 6 can be externally controlled by contacts or other devices mounted on pallet 9 to prevent collisions and to stop the pallets at work stations.

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