Self sealing piston
United States Patent 2992052
US Patent References:
/1020836.html
- - 1020836

/1224999.html
- - 1224999

Free piston engine
- - 2869524


Inventors:
John, Charles DE. R.
Publication Date:
07/11/1961
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Assignee:
John, Charles DE. R.
Primary Class:
92/246
Other Classes:
92/194, 222/386, 123/DIG.003
International Classes:
F16J1/00
Foreign References:
DE119385C
FR701093A