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U.S. Department of Energy
Office of Scientific and Technical Information

Unsymmetrical free piston engine

Patent ·
OSTI ID:6966602
This patent describes a compact and substantially vibration free engine of the unsymmetrical free piston type for driving a compressor or other energy absorbing device. It comprises: a cylinder, support means for supporting one end only of the cylinder, first and second pistons in the cylinder with a combustion chamber therebetween. The first piston having a first rod extending through a first end of the cylinder. The second piston having a second rod extending through a second end of the cylinder and having a double rack thereon beyond the second cylinder end, a pair of spaced pinion gears beyond the second end with one each engaging one side each of the double rack, a pair of spaced and rigidly connected racks having one each of the connected racks engaging one each of the pinion gears, a drive shaft extending from one of the first or second rods for driving an energy adsorbing device, and drive means located along the side of the cylinder and extending from the spaced racks to the rod beyond the opposite cylinder.
Assignee:
NOV; EDB-90-077780; NOV-90-009224
Patent Number(s):
A; US 4896632
Application Number:
PPN: US 6786067A
OSTI ID:
6966602
Country of Publication:
United States
Language:
English

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