Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02775775 201,05-01
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[0006] According to another aspect, the stroke length control element may
comprises a slot
and the stroke length control element may comprise a sliding element that
engages the slot
and a shaft that rotatably engages the block, the spring member applying a
force to the shaft.
[0007] According to another aspect, there is provided a method of compressing
gas from a
source comprising a liquid component, the method comprising the steps of
providing a gas
compressor as described above; connecting the fluid input to a source of fluid
having a gas
component and a liquid component; connecting the fluid output to a body that
receives
compressed gas; applying a predetermined biasing force via the spring member
to set the
pressure above which the stroke length of the piston is reduced; and driving
the rotary body to
cause the piston to draw in gas entering the fluid inlet onto the piston
chamber as the piston
retracts and compressing the gas and expelling the gas out the fluid outlet as
the piston
extends, the stroke length control element being forced toward the central
axis to shorten the
stroke length of the piston upon application of a predetermined back pressure
due to the
presence of liquid to the piston as it reciprocates.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] These and other features will become more apparent from the
following
description in which reference is made to the appended drawings, the drawings
are for the
purpose of illustration only and are not intended to be in any way limiting,
wherein:
FIG. 1 is a side elevation view of the gas compressor with the cover removed,
where the stroke length control element is in an extended position.
FIG. 2 is a side elevation view in section of the gas compressor with the
stroke
length control element in an extended position and the rotary body in a first
rotary
position.
FIG. 3 is a side elevation view in section of the gas compressor with the
stroke
length control element in an extended position and the rotary body in a second
rotary position.
FIG. 4 is a side elevation view in section of the gas compressor with the
stroke
length control element in an extended position and the rotary body in a third
rotary
position.
CA 02775778 2012-05-25
3
FIG. 5 is a side elevation view in section of the gas compressor with the
stroke
length control element in a retracted position and the rotary body in a first
rotary
position.
FIG. 6 is a side elevation view in section of the gas compressor with the
stroke
length control element in a retracted position and the rotary body in a second
rotary position.
FIG. 7 is a side elevation view in section of the gas compressor with the
stroke
length control element in a retracted position and the rotary body in a third
rotary
position.
FIG. 8 is a perspective view of a gas compressor.
DETAILED DESCRIPTION
[0009] A gas compressor generally identified by reference numeral 10,
will now be
described with reference to FIG. 1 through 8.
Structure and Relationship of Parts:
[0010] Referring to FIG. 2, gas compressor 10 has a housing 12 with a
fluid inlet 14 and
a fluid outlet 16. A rotary body 18 is positioned within housing 12. Referring
to FIG. 3, fluid
inlet 14 connects to an inlet chamber 20 and fluid outlet 16 connects to an
outlet chamber 22.
Inlet and outlet chambers 20 and 22 are defined between the inner surface 24
of housing 12
and the outer circumferential surface 26 of rotary body 18. Rotary body 18
provides a seal
between chambers 20 and 22. Referring to FIG. I, rotary body 18 rotates on
bearings 23. As
used herein, the term "fluid" may include gas, liquid or combinations thereof.
[0011] Referring to FIG. 2, rotary body 18 as shown has two piston chambers
28 that are
open to outer circumferential surface 26 and thus in communication with inlet
and outlet
chambers 20 and 22 on an alternating basis as rotary body 18 rotates. Each
piston chamber
28 houses a piston 30 that reciprocates in the respective piston chamber 28.
As shown, piston
chambers 28 are parallel and coaxial on opposite sides of rotary body 18.
Pistons 30 are
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