Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2007-07-24
2007-07-24
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C267S174000, C267S180000
Reexamination Certificate
active
11042234
ABSTRACT:
A linear compressor includes a cylinder part and a piston part. A spring connects the cylinder part and the piston part and operates in the direction of reciprocation of the piston part relative to the cylinder part. The piston part includes a radially compliant but axially stiff linkage and piston. The cylinder part includes a cylinder and a cylinder liner therewithin. A bore runs through the cylinder liner and the piston reciprocates in the bore. Gas bearing passages are formed between the cylinder and the cylinder liner leading to opening through the wall of the cylinder liner to the bore. A gas bearing manifold receives compressed gases and supplies the compressed gases to the gas bearing passages. The gas bearing passages follow a tortuous path to the openings.
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A copy of the paper “Vibration Characteristics of Small Rotary and Linear Cryogenic Coolers for IR Systems” (12 pages) by W.J. Gully and M.W. Hanes of G.M. Hughes, 1990.
Duncan Gerald David
Ferguson William George
McGill Ian Campbell
Roke Lindsey Jack
Taylor Andrew Paul
Fisher & Paykel Appliances Limited
Freay Charles G.
Trexler, Bushnell Giangiorgi, Blackstone & Marr, Ltd.
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