Expansible chamber devices – Cylinder detail – Nonmetallic piston contacting portion
Patent
1994-07-13
1995-11-28
Denion, Thomas E.
Expansible chamber devices
Cylinder detail
Nonmetallic piston contacting portion
92187, 92248, F01B 1102, F16J 1000, F16J 900
Patent
active
054697760
ABSTRACT:
A hydraulic pumping device for use in a hydraulic machine having a piston and slider shoe unit made of a combination of plastic and metal material to operate with virtually lubricant free fluid.
REFERENCES:
patent: 3183848 (1965-05-01), Raymond
patent: 3418942 (1968-12-01), Partos
patent: 3746476 (1973-07-01), Bradley
patent: 4519119 (1985-05-01), Nakayama et al.
patent: 4683803 (1987-08-01), Miller et al.
patent: 5131818 (1992-07-01), Wittkup
Hansen Ove T.
Jepsen Hardy
Martensen Lars
Moeller Henry M.
Danfoss A/S
Denion Thomas E.
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