Mcdowell-Wellman Engineering Company

Roger L Hulette

Thomas E Ban

Subir K Mittra

A circular traveling grate machine is disclosed, which is particularly suitable for educting oil from oil shale. The machine includes generally circular inner and outer walls mounted for movement along a trackway and which carry a plurality of burden conveying pallets, hinged to the outer wall and releasably connected to the inner wall. As each pallet approaches and enters a burden discharge station, the connection between the pallet and the inner wall is released. The pallet is then guided downwardly to a discharge position by a piston and cylinder as each pallet is pivoted on its hinge under the influence of gravity. Each lowered pallet is raised by a piston and cylinder and latched in a burden carrying position to the inner wall. The pallets and walls are supported for rotation along the trackway by water cooled supporting grid to minimize differential expansion and contraction of component parts of the machine as they are subjected to differential temperatures.

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Berea, OH, United States of America

Roger L Hulette