Pumps – Processes
Reexamination Certificate
2000-03-01
2001-11-20
Freay, Charles G. (Department: 3746)
Pumps
Processes
C417S238000, C417S536000
Reexamination Certificate
active
06318967
ABSTRACT:
BACKGROUND
This invention relates to a gas compression apparatus and method and, more particularly, to such an apparatus and method providing interchangeable compression cylinder sections allowing for changes in stroke or facilitating cylinder replacement.
Gas compressors having a piston that reciprocates in a compression cylinder mounted between two end heads are well known. Many designs of this type are utilize a single casting that includes the cylinder and the end heads which causes several problems.
For example when the cylinder bore is damaged or wears out, the entire casting must be removed from operation and hauled to a machine shop or the like. Also, if it is desired to use another cylinder having a different bore length to attain a different piston stroke length the entire casting must be replaced.
Therefore what is needed is a gas compressor system and method according to which the cylinder can be easily and quickly replaced with a minimum of down time.
SUMMARY
According to an embodiment of the present invention a compression cylinder is connected between two heads, and gas is introduced into at least one head and into the cylinder. A piston is reciprocated in the cylinder with a stroke corresponding to the length of the cylinder to compress the gas after which the compressed gas is discharged from the cylinder. If the cylinder bore becomes damaged or wears out, or if it is desired to change the stroke length of the piston, the cylinder can easily be replaced by disconnecting it from the heads and installing another cylinder between the heads.
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Bennitt Robert A.
Wirz William C.
Dresser-Rand Company
Freay Charles G.
Haynes and Boone LLP
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