Hydraulic synchronizing coupler for a free piston engine

Details Hydraulic synchronizing coupler for a free piston engine Hydraulic synchronizing coupler for a free piston engine

2006-07-18

2006-07-18

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

Reexamination Certificate

active

07077080

ABSTRACT:
A free piston engine has a pair of opposed cylinders on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each in a respective one of the cylinders, with a push rod connected therebetween. The push rod forms a fluid plunger. An outer piston assembly includes a pair of outer pistons, one each in a respective one of the cylinders, with a pull rod connected therebetween. The pull rod forms a fluid plunger. The movement of the inner and outer piston assemblies during engine operation will cause the fluid plungers to pump fluid from a low pressure container into a high pressure chamber as a means of storing the energy output. A hydraulic coupler synchronizes the inner and outer piston assemblies.

REFERENCES:
patent: 5829393 (1998-11-01), Achten et al.
patent: 6206656 (2001-03-01), Bailey et al.
patent: 6953010 (2005-10-01), Hofbauer

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