U.S. patent application number 11/447157 was filed with the patent office on 2006-12-28 for cylinder assembly for compressor and assembling method thereof.
This patent application is currently assigned to SAMSUNG GWANGJU ELECTRONICS CO., LTD.. Invention is credited to Jae Nam An.
Application Number | 20060292022 11/447157 |
Document ID | / |
Family ID | 37567609 |
Filed Date | 2006-12-28 |
United States Patent
Application |
20060292022 |
Kind Code |
A1 |
An; Jae Nam |
December 28, 2006 |
Cylinder assembly for compressor and assembling method thereof
Abstract
A method for assembling a cylinder assembly for a compressor
including a cylinder block having a compression chamber defined
therein, a cylinder head coupled to the cylinder block to seal the
compression chamber, and a valve device interposed between the
cylinder block and the cylinder head, the method including:
supporting the cylinder block on an assembling jig, aligning the
valve device and the cylinder head with the cylinder block by
fastening guide pins through valve guide holes perforated through
the valve device and head guide recesses formed at a surface of the
cylinder head to be coupled to the valve device, fixing the
cylinder assembly such that the cylinder block, valve device, and
cylinder head do not separate, and removing the assembling jig from
the cylinder assembly.
Inventors: |
An; Jae Nam; (Gwangju-City,
KR) |
Correspondence
Address: |
BLANK ROME LLP
600 NEW HAMPSHIRE AVENUE, N.W.
WASHINGTON
DC
20037
US
|
Assignee: |
SAMSUNG GWANGJU ELECTRONICS CO.,
LTD.
|
Family ID: |
37567609 |
Appl. No.: |
11/447157 |
Filed: |
June 6, 2006 |
Current U.S.
Class: |
417/569 |
Current CPC
Class: |
F04B 39/122 20130101;
F04B 39/125 20130101; F04B 39/1073 20130101; F04B 39/1066 20130101;
F04B 39/14 20130101 |
Class at
Publication: |
417/569 |
International
Class: |
F04B 39/10 20060101
F04B039/10 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 24, 2005 |
KR |
2005-54738 |
Claims
1. A method for assembling a cylinder assembly for a compressor
including a cylinder block having a compression chamber defined
therein, a cylinder head coupled to the cylinder block to seal the
compression chamber, and a valve device interposed between the
cylinder block and the cylinder head to control inflow and outflow
of refrigerant into and out of the compression chamber, the method
comprising: supporting the cylinder block on an assembling jig,
which is formed with a plurality of guide pins, such that the
plurality of guide pins extend outward from the cylinder block;
aligning the valve device and the cylinder head with the cylinder
block by fastening the plurality of guide pins through valve guide
holes perforated through the valve device and head guide recesses
formed at a surface of the cylinder head; fixing the cylinder
assembly such that the cylinder block, valve device, and cylinder
head do not separate from each other; and removing the assembling
jig from the cylinder assembly.
2. The method according to claim 1, wherein: the cylinder block
includes a body portion, a cylindrical portion extending laterally
from a circumference of the body portion to define the compression
chamber therein, and a flange portion provided at a distal end of
the cylindrical portion opposite the body portion, the supporting
of the cylinder block is accomplished as a surface of the flange
portion facing the cylindrical portion is supported on a supporting
surface of the assembling jig, and the block guide holes are
provided at the flange portion.
3. The method according to claim 2, wherein: the cylinder head
includes a refrigerant suction chamber and a refrigerant discharge
chamber, the refrigerant section chamber being separated from the
refrigerant discharge chamber, and the valve device includes, a
valve plate having a suction hole configured to enable
communication between the compression chamber and the refrigerant
suction chamber, a discharge hole enabling the compression chamber
and the refrigerant discharge chamber, and a discharge valve to
open or close the discharge hole, a suction valve interposed
between the valve plate and the flange portion to open or close the
suction hole, a first gasket interposed between the suction valve
and the flange portion, and a second gasket interposed between the
valve plate and the cylinder head, and the valve guide holes are
provided in the valve device to correspond to the block guide
holes.
4. A cylinder assembly for a compressor, comprising: a cylinder
block having a compression chamber defined therein; a cylinder head
coupled to the cylinder block and configured to seal the
compression chamber; and a valve device interposed between the
cylinder block and the cylinder head and configured to control the
inflow and outflow of refrigerant into and out of the compression
chamber, wherein the valve device and the cylinder head are
positioned to be aligned with the cylinder block when the cylinder
block is supported on an assembling jig, wherein a plurality of
block guide holes and a plurality of valve guide holes are
perforated through a portion of the cylinder block and the valve
device, respectively, to allow guide pins to be fastened
therethrough, and wherein a plurality of head guide recesses are
formed at a surface of the cylinder head to be coupled to the valve
device.
5. The assembly according to claim 4, wherein: the cylinder block
includes a body portion, a cylindrical portion extending laterally
from a circumference of the body portion to define a compression
chamber therein, and a flange portion provided at a distal end of
the cylindrical portion opposite to the body portion, and the
plurality of block guide holes are provided at the flange
portion.
6. A method for assembling a cylinder assembly, the method
comprising: fastening at least one guide pin through at least one
guide hole provided at a cylinder block; aligning at least one of a
valve device and a cylinder head with the cylinder block by
fastening at least one guide pin through at least one guide portion
provided at each of the valve device and the cylinder head;
securing the cylinder block to at least one of the valve device and
the cylinder head; and removing the at least one guide pin.
7. The method according to claim 6, wherein the at least one guide
pin includes a plurality of guide pins.
8. The method according to claim 7, wherein the at least one guide
pin is provided at an assembling jig.
9. The method according to claim 6, wherein the at least one guide
pin is provided at an assembling jig.
10. The method according to claim 6, wherein the at least one guide
portion includes at least one of a valve guide hole and a head
guide recess.
11. An apparatus for assembling a cylinder assembly, the apparatus
comprising: means for fastening at least one guide pin through at
least one guide hole provided at a cylinder block; means for
aligning at least one of a valve device and a cylinder head with
the cylinder block by fastening at least one guide pin through at
least one guide portion provided at each of the valve device and
the cylinder head; means for securing the cylinder block to at
least one of the valve device and the cylinder head; and means for
removing the at least one guide pin.
12. The method according to claim 11, wherein: the at least one
guide pin includes a plurality of guide pins, and wherein the at
least one guide portion includes at least one of a valve guide hole
and a head guide recess.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of priority under 35
U.S.C. .sctn.119 to Korean Patent Application No. 2005-0054738,
filed Jun. 24, 2005, the disclosure of which is incorporated herein
by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a cylinder assembly for a
compressor, and an assembly method therefor. More particularly, the
present invention relates to a cylinder assembly for a compressor
in which a cylinder block, valve device, and cylinder head of the
cylinder assembly can be easily assembled while achieving a
simplified configuration of the cylinder assembly.
[0004] 2. Description of the Related Art
[0005] Generally, a compressor is employed in a refrigeration cycle
of a refrigerator, air conditioner, or the like to compress
refrigerant. The compressor includes a compression unit to perform
a refrigerant compression operation, and a drive unit to provide a
drive force required for the compression of refrigerant. Generally,
both the compression and drive units are arranged in a hermetic
container forming the outer appearance of the compressor. An
example of the cylinder assembly for a compressor is described in
Korean Patent Laid-Open Publication No. 10-2004-0035492.
SUMMARY OF THE INVENTION
[0006] The present invention has been made in order to solve the
above-identified problems. It is an aspect of the invention to
provide a cylinder assembly for a compressor which can be assembled
easily while achieving a simplified configuration, and an
assembling method thereof.
[0007] To this end, a non-limiting aspect of the present invention
provides a method for assembling a cylinder assembly for a
compressor including a cylinder block having a compression chamber
defined therein, a cylinder head coupled to the cylinder block to
seal the compression chamber, and a valve device interposed between
the cylinder block and the cylinder head to control inflow and
outflow of refrigerant into and out of the compression chamber, the
method including: supporting the cylinder block on an assembling
jig, which is formed with a plurality of guide pins, such that the
plurality of guide pins extend outward from the cylinder block;
aligning the valve device and the cylinder head with the cylinder
block by fastening the plurality of guide pins through valve guide
holes perforated through the valve device and head guide recesses
formed at a surface of the cylinder head; fixing the cylinder
assembly such that the cylinder block, valve device, and cylinder
head do not separate from each other; and removing the assembling
jig from the cylinder assembly.
[0008] Yet another aspect of the present invention provides a
cylinder assembly for a compressor, including: a cylinder block
having a compression chamber defined therein; a cylinder head
coupled to the cylinder block and configured to seal the
compression chamber; and a valve device interposed between the
cylinder block and the cylinder head and configured to control the
inflow and outflow of refrigerant into and out of the compression
chamber, wherein the valve device and the cylinder head are
positioned to be aligned with the cylinder block when the cylinder
block is supported on an assembling jig, and wherein a plurality of
block guide holes and a plurality of valve guide holes are
perforated through a portion of the cylinder block and the valve
device, respectively, to allow guide pins to be fastened
therethrough, and wherein a plurality of head guide recesses are
formed at a surface of the cylinder head to be coupled to the valve
device.
[0009] Another aspect of the invention provides a method for
assembling a cylinder assembly, the method including: fastening at
least one guide pin through at least one guide hole provided at a
cylinder block; aligning at least one of a valve device and a
cylinder head with the cylinder block by fastening at least one
guide pin through at least one guide portion provided at each of
the valve device and the cylinder head; securing the cylinder block
to at least one of the valve device and the cylinder head; and
removing the at least one guide pin.
[0010] Additional aspects and/or advantages of the invention will
be set forth in part in the description which follows and, in part,
will be obvious from the description, or may be learned by practice
of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] These and/or other aspects and advantages of the exemplary
embodiments of the invention will become apparent and more readily
appreciated from the following description of the embodiments,
taken in conjunction with the accompanying drawings, of which:
[0012] FIG. 1 is a sectional view schematically showing a
non-limiting configuration of a compressor consistent with the
present invention;
[0013] FIG. 2 is an exploded perspective view showing a
non-limiting configuration of a cylinder assembly included in the
compressor consistent with the present invention;
[0014] FIG. 3 is a perspective view showing a non-limiting example
of an assembling jig that may be used to assemble the cylinder
assembly for the compressor consistent with the present
invention;
[0015] FIG. 4 is a sectional view showing a non-limiting example of
a cylinder block of the cylinder assembly for the compressor
consistent with the present invention;
[0016] FIG. 5 is a sectional view showing non-limiting examples of
a valve device and a cylinder head of the cylinder assembly for the
compressor consistent with the present invention;
[0017] FIG. 6 is a sectional view showing exemplary fasteners used
to inter-couple the respective parts of the cylinder assembly for
the compressor consistent with the present invention; and
[0018] FIG. 7 is a sectional view showing a non-limiting example of
the completely assembled cylinder assembly for the compressor
consistent with the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Reference will now be made in detail to exemplary
embodiments of the present invention, examples of which are
illustrated in the accompanying drawings, wherein like reference
numerals refer to like elements throughout. The embodiments are
described below to explain the present invention by referring to
the figures.
[0020] By way of explanation, the compression unit may include a
piston, a cylinder block, a cylinder head, and a valve device. The
piston may be connected to a rotary shaft of the drive unit via a
connecting rod to perform linear reciprocating movements. The
cylinder block may have a compression chamber in which the piston
may be disposed. The cylinder head may be coupled to the cylinder
block to seal the compression chamber, the cylinder head having a
refrigerant suction chamber and a refrigerant discharge chamber,
which are separated from each other. The valve device may be
interposed between the compression chamber and the cylinder head to
control the flow of the refrigerant being introduced from the
refrigerant suction chamber into the compression chamber or
discharged from the compression chamber into the refrigerant
discharge chamber.
[0021] The cylinder block, valve device, and cylinder head may be
inter-coupled to one another to form the cylinder assembly. A
plurality of fasteners, such as fixing bolts, may be fastened
through the cylinder assembly to prevent separation of the cylinder
assembly. The fixing bolts may be inserted to penetrate through the
cylinder head and the valve device, thereby being fastened to the
cylinder block at positions around the compression chamber.
[0022] Also, the cylinder assembly may be provided with a guide
device. The guide device serves to maintain the respective parts of
the cylinder assembly in an aligned state at their correct
positions without deviating from their assembling positions when
the fixing bolts are fastened, thereby facilitating more easy
assembling of the cylinder assembly. The guide device may include a
guide device, which may include a plurality of guide pin holes
perforated through a cylinder block at opposite edge positions, and
perforated through a valve device and cylinder head, respectively,
at positions corresponding to the guide pin holes of the cylinder
block. The guide device may also include a plurality of guide pins
fastened in the respective guide pin holes of the cylinder block,
to allow the guide pin holes of the valve device and cylinder head
to be successively inserted to the guide pins. Alternatively or
additionally, the guide device may include protrusions instead of
the guide pin holes of the cylinder head. The protrusions may serve
as guide pins, such that the guide pin holes of the valve device
and cylinder block are successively inserted to the protrusions, to
align the respective parts of the cylinder assembly at their
correct positions. With the use of the guide device for aligning
the respective parts at their correct positions, the cylinder
assembly may be securely assembled by the fixing bolts without risk
of separation.
[0023] Although this exemplary cylinder assembly for a compressor
is advantageous in that the respective parts thereof can be easily
assembled with one another via the guide device, elements of the
guide device (for example, the guide pins fastened in the cylinder
block or protrusions integrally formed at the cylinder head) may
increase the number of parts of the cylinder assembly, thereby
making it difficult to simplify the configuration of the cylinder
assembly.
[0024] Accordingly, FIG. 1 is a sectional view schematically
showing another exemplary configuration of a compressor consistent
with the present invention. The compressor of FIG. 1 reduces the
number of parts used in assembly. As shown in FIG. 1, the
compressor may include a hermetic container 1 forming the outer
appearance of the compressor. The hermetic container 1 may be
adapted to receive a refrigerant suction pipe 2 and a refrigerant
discharge pipe 3, a compression unit configured to perform a
refrigerant compression operation, and a drive unit configured to
provide a drive force for the compression of refrigerant. The
compression and drive units may be arranged in the hermetic
container 1.
[0025] The drive unit may include a stator 4, which may be fixed at
a location above and around a cylinder block 20, a rotor 5, which
may be disposed inside the stator 4 to rotate as it electrically
interacts with the stator 4, and a rotary shaft 7, which may be
press-fitted in the center of the rotor 5 to be rotatably
supported, at a lower portion thereof, in a bearing 6 that is
mounted in the center of the cylinder block 20. A lower end of the
rotary shaft 7 may form an eccentric portion 7a.
[0026] The compression unit may include piston 9, cylinder block
20, and cylinder head 40. Piston 9 may be connected to the
eccentric portion 7a of the rotary shaft 7 via a connecting rod 8
to perform linear reciprocating movements when the rotary shaft 7
rotates. The cylinder block 20 may have a compression chamber 21 in
which the piston 9 may be disposed. Cylinder head 40 may be coupled
to the cylinder block 20 to seal the compression chamber 21, and
may have a refrigerant suction chamber 41 and a refrigerant
discharge chamber 42. Refrigerant suction chamber 41 and
refrigerant discharge chamber 42 may be separated from each other.
A valve device 30 may be interposed between the compression chamber
21 and the cylinder head 40 to control the flow of refrigerant
being introduced from the refrigerant suction chamber 41 into the
compression chamber 21 or discharged from the compression chamber
21 into the refrigerant discharge chamber 42.
[0027] With this non-limiting configuration, if the rotary shaft 7
rotates along with the rotor 5 in accordance with the electric
interaction between the stator 4 and the rotor 5 of the drive unit,
the piston 9 (connected to the rotary shaft 7 via the connecting
rod 8) linearly reciprocates in the compression chamber 21.
Thereby, refrigerant is suctioned from the hermetic container 1
into the compression chamber 21 and may pass through the
refrigerant suction pipe 2 and the refrigerant suction chamber 41,
thereby being compressed in the compression chamber 21.
Subsequently, the compressed refrigerant may be discharged from the
suction chamber 21 to the outside of the hermetic container 1 by
passing through the refrigerant discharge chamber 42 and the
refrigerant discharge pipe 3. As the refrigerant suction,
compression, and discharge operations are repeatedly performed, the
compressor accomplishes desired compression of the refrigerant.
[0028] FIG. 2 is an exploded perspective view showing a
non-limiting exemplary configuration of a cylinder assembly
included in the compressor. As shown in FIG. 2, the cylinder block
20 may include a body portion 22, a cylindrical portion 23, and a
square shaped flange portion 24. The cylindrical portion 23 may
extend laterally from a circumferential location of the body
portion 22 to define the compression chamber 21 therein. Square
shaped flange portion 24 may be provided at a distal end of the
cylindrical portion 23 opposite to the body portion 22 for coupling
of the valve device 30 and cylinder head 40. The valve device 30
may include a valve plate 31 and a discharge hole (not shown).
Valve plate 31 may include a suction hole 31a formed near the
center thereof to communicate the compression chamber 21 with the
refrigerant suction chamber 41. The discharge hole may be formed
near the center thereof opposite the suction hole 31a to enable
communication between compression chamber 21 and refrigerant
discharge chamber 42. The valve plate 31 may be provided with a
discharge valve 31b to open or close the discharge hole. The
discharge valve 31b may be located at a surface of valve plate 31
facing the refrigerant discharge chamber 42 to cover the discharge
hole. The valve device 30 may further include a suction valve 32, a
first gasket 33 and a second gasket 34. The suction valve 32 may be
interposed between the valve plate 31 and the flange portion 24 of
the cylinder block 20. The suction valve 32 may also include a flap
portion 32a configured to open and/or close the suction hole 31a.
First gasket 33 may be interposed between the suction valve 32 and
the flange portion 24. Second gasket 34 may be interposed between
the valve plate 31 and the cylinder head 40. The first and second
gaskets 33 and 34 may serve to prevent refrigerant leakage. The
valve device 30, cylinder head 40, and cylinder block 20 may be
inter-coupled with one another to form cylinder assembly 10.
[0029] To assemble cylinder assembly 10 of the present invention,
the flange portion 24 may be oriented upward such that a rear
surface of the flange portion 24 (i.e., a surface facing the
cylindrical portion 23) may be supported on a supporting surface
111 of an assembling jig 100. Assembling jig 100 may be in turn
supported by a supporting bar 200, as shown in FIG. 3. Then, the
respective elements of the valve device 30 and the cylinder head 40
may be stacked on an upper surface of the flange portion 24 in
succession. After that, a plurality of fasteners (e.g., fixing
bolts or other equivalent fasteners) 50 may be inserted from the
top of the cylinder head 40 to be fastened into the flange portion
24 of the cylinder block 20 by passing through the cylinder head 40
and the valve device 30, to inter-couple and assemble the cylinder
block 20, valve device 30, and cylinder head 40. For the fastening
of the fixing bolts 50, bolt fastening holes 24a, 31c, 32b, 33a,
34a, and 43 may be perforated through the respective elements of
the valve device 30, the cylinder head 24, and the cylinder head
40. For example, the fastening holes 24a, 31a, 32b, 33a, 34a, and
43 may be positioned at the corners of the elements.
[0030] The assembling jig 100 may include a body portion 110, which
may be connected to the supporting bar 200. An upper surface of the
body portion 110 may form the supporting surface 111, and a pair of
guide pins 120 may be integrally formed with the body portion 110.
The body portion 110 may be centrally formed along a front end of
the assembling jig 100 with a coupling recess 112 having an
approximately semi-spherical shape, such that the coupling recess
112 may come into close contact with an outer circumference of the
cylindrical portion 23 of the cylinder block 20 when the rear
surface of the flange portion 24 of the cylinder block 20 is
supported on the supporting surface 111. After the fixing bolts 50
are fastened, the assembling jig 100 may be removed from the
cylinder assembly 10.
[0031] To maintain the respective parts of the cylinder assembly 10
in an aligned state at their correct positions without deviating
from their assembling positions when the fixing bolts 50 are
fastened, the pair of guide pins 120 may be integrally formed with
the body portion 110 of the assembling jig 100. The guide pins 120
may protrude upward from the supporting surface 111 of the
assembling jig 100 for a predetermined length at opposite lateral
locations. In this case, the flange portion 24 may be perforated,
at approximately center positions of left and right lateral sides
thereof, with block guide holes 24b, such that the guide pins 120
of the assembling jig 100 may be fastened through the block guide
holes 24b to align the respective parts of the cylinder assembly
10.
[0032] When the guide pins 120 are fastened through the block guide
holes 24b of the flange portion 24 to protrude upward, the elements
of the valve device 30 and the cylinder head 40 may be aligned with
the guide pins 120. For this purpose, the elements of the valve
device 30 may be perforated with valve guide holes 31d, 32c, 33b,
and 34b at circumferential positions thereof corresponding to the
block guide holes 24b. Also, the cylinder head 40 may be formed at
a surface thereof to be coupled to the valve device 30 with head
guide recesses 44. The head guide recesses 44 may be opened toward
the valve device 30 to correspond to the block guide holes 24.
[0033] The cylinder assembly 10 having the above-described
configuration may be formed via an assembling method which may
include: supporting the cylinder block 20 on the assembling jig
100; stacking the elements of the valve device 30 and the cylinder
head 40 on the cylinder block 20 that is supported on the
assembling jig 100 to align the respective parts of the cylinder
assembly 10 at their correct positions; fastening the fixing bolts
50 through the respective parts of the cylinder assembly 10, to
prevent separation there between; and removing the assembling jig
100.
[0034] Referring to FIG. 4, to assemble the cylinder assembly 10,
the flange portion 24 may be oriented upward and the assembling jig
100 may be inserted around the cylindrical portion 23 between the
body portion 22 and the flange portion 24 of the cylinder block 20.
Thereby, the rear surface of the flange portion 24 of the cylinder
block 20 may be supported on the supporting surface 111 of the body
portion 110 of the assembling jig 100, and the guide pins 120 of
the assembling jig 100 may be fastened through the block guide
holes 24b that may be perforated through the flange portion 24,
such that the guide pins 120 may protrude upward from the flange
portion 24.
[0035] When cylinder block 20 is supported on the assembling jig
100 as stated above (referring to FIG. 5), the first gasket 33,
suction valve 32, valve plate 31, and second gasket 34 of the valve
device 30 may be successively stacked on the upper surface of the
flange portion 24, such that the valve guide holes 33b, 32c, 31d,
and 34d of the elements of the valve device 30 may be successively
mated with the guide pins 120 protruding upward from the flange
portion 24. After that, the cylinder head 40 may be stacked on top
of the valve device 30 such that the head guide recesses 44 of the
cylinder head 40 may be fastened to distal ends of the guide pins
120 protruding upward from the valve device 30. Thereby, the
respective parts of the cylinder assembly 10 may be supported by
the guide pins 120 to be aligned at their correct positions.
[0036] Subsequently (referring to FIG. 6), the fixing bolts 50 may
be inserted from the top of the cylinder head 40 to be fastened to
the flange portion 24 by passing through the cylinder head 40 and
the respective elements of the valve device 30, to inter-couple and
fix the respective parts of the cylinder assembly 10 without risk
of separation. When the fixing bolts 50 are fastened, the
respective parts of the cylinder assembly 10 can be maintained in
an aligned state at their correct positions without deviating from
their assembling positions, since they are supported by the guide
pins 120.
[0037] After the fixing bolts 50 have been fastened (referring to
FIG. 7), the assembling jig 100 may be moved downward to separate
the guide pins 120 from the cylinder assembly 10. Thereby, the
assembling jig 100 may be removed outward from between the flange
portion 24 and the body portion 22 of the cylinder block 20. As the
assembling jig 100 is removed from the cylinder assembly 10, the
assembling of the cylinder assembly 10 may be completed. In the
resulting non-limiting example of a cylinder assembly 10 consistent
with the present invention, since the guide pins 120, which may be
integrally formed with the assembling jig 100, may be removed from
the cylinder assembly 10 (possibly simultaneously) with the removal
of the assembling jig 100, the guide pins 120 do not increase the
number of parts of the cylinder assembly 10. This ensures easy
assembling and a simplified configuration of the cylinder assembly
10.
[0038] As apparent from the above description, the present
invention provides a cylinder assembly for a compressor and an
assembling method using an assembling jig. The assembling jig may
be integrally formed with guide pins to effectively maintain
respective parts of the cylinder assembly in an aligned state while
preventing the respective parts from deviating from their correct
assembling positions when fixing bolts are fastened through the
cylinder assembly. After being used to assemble the cylinder
assembly, the assembling jig (and thus the guide pins) can be
removed from the assembled cylinder assembly. The use of the
removable assembling jig has the effect of facilitating the easy
assembling of the cylinder assembly while simplifying the
configuration of the cylinder assembly.
[0039] Although non-limiting embodiments of the present invention
have been shown and described, it would be appreciated by those
skilled in the art that changes may be made to these embodiments
without departing from the principles and spirit of the invention,
the scope of which is defined in the claims and their
equivalents.
* * * * *