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Патент USA US3096946

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July 9, 1963
I
J. E. wooDs
3,096,936
FLUID CONTROL APPARATUS
Filed March 2, 1961
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INVENTOR.
JOHN E. wooos;
5
6
“WM WW1
ATTORNEY
United States Patent ()1 ice
3,096,936
Patented July 9, 1963
2
1
Disposed within the tube 30‘ and extending therefrom
3,096,936
FLUID CONTROL APPARATUS
John E. Woods, Cohasset, Mass, assignor to Standard
Thomson Corporation, ‘Waltham, Mass., a corporation
of Delaware
Filed Mar. 2, 19631, Ser. No. 92,801
2 Claims. ((11. 236-456)
is a rod or piston 32. The rod 32 is threadedly adjust
ably connected to the inner surface of the tube 30‘.
The rod 32 extends ‘toward the end member 10‘ and
has a portion slidably disposed within a container 34.
Within the container 34 is a quantity of thermal respon~
sive expansible-contraotible material 36, shown in FIG
URE 2. The expansible-contractible material 36 may be
any suitable material having appreciable expansion char
This invention relates to ?uid control apparatus. The
invention relates more particularly to thermal respon 10 acteristics over a given temperature range.
The container 34 has a ?ange portion 40 which is
sive fluid control apparatus.
engaged by a compression spring 42. The compression
An object of this invention is to provide thermal re
spring 42 also engages the end member 10' [and urges the
sponsive valve apparatus which is capable of operation
container 34 in a direction away from the end member
within a small space but which is capable of controlling
relatively high volumes of fluid at relatively high pres 15 10. The container 3-4 ‘also has a nose 46 which is engage
able with the end member 10‘ to close the opening 12.
sures.
Another object of this invention is to provide such
apparatus which can be used as a steam trap device or
The spring 42 has lesser expansive forces than does
the spring 28 which engages the guide members 24 and
26. The reason for this is discussed below.
other thermal responsive fluid control mechanism.
As stated above, the apparatus of this invention may
Another object of this invention is to provide such 20
be used as a steam trap. When the apparatus is so
apparatus which can be constructed and installed at rela
used, it may be disposed within ‘a housing 50 wd a
tively low costs.
Other objects and advantages reside in the construc
conduit 52, which is connected thereto, as shown in FIG
URE 5. A cap member 54 closes an opening in the hous
tion of parts, the combination thereof, the method of
manufacture, and the mode of operation, as will become 25 ing ‘50 so‘ that the valve apparatus may be inserted through
the opening in the housing 5G‘. The housing 50 has a
more apparent from the following description.
portion 55‘ which may be in communication with a steam
In the drawing:
line. The conduit 52 communicates with the atmosphere.
FIGURE 1 is a perspective view showing apparatus of
The end portion 10 is thus located within the conduit
this invention disposed in a conduit member, parts of
30 52 with the sealing member 14‘ in engagement therewith.
which are broken away.
The retainer member 20 is provided with a plurality of
FIGURE 2 is a sectional view, drawn on a scale some
lugs 56 extending laterally therefrom and which engage
what larger than that of FIGURE 1, of apparatus of this
the end of the conduit 52 to limit the extent of the ap
invention.
paratus within the conduit 52. Due to the fact that the
FIGURE 3 is a sectional view, similar to FIGURE 2,
35 diameter of the end member 10‘ and the retainer member
but showing the apparatus in a position of operation.
20 is less than the inside diameter of the conduit 52,
FIGURE 4 is a sectional view, similar to FIGURES 2
passages 64 are provided for ?ow of fluid between the
and 3, showing the apparatus in another position of oper
retainer member 20 and the conduit 52, as shown in
ation.
FIGURE 5 is a sectional view, drawn on substantially
FIGURES 5 and 7.
The retainer member 20 is shown as being provided
the same scale as FIGURE 1 and showing the apparatus 40
with extensions ‘60 which may be used to aid in posi
in the same position of operation as FIGURE 2, but
tioning the apparatus within the housing 50 and the con
showing a housing for the apparatus with ‘fluid moving
duit 52 and for removal of the apparatus therefrom.
through the housing.
FIGURE 6 is a sectional view taken substantially on
line ‘6—6 of FIGURE 2..
FIGURE 7 is a sectional view taken substantially on
line 7——7 of FIGURE 2.
FIGURE 8 is a sectional view taken substantially on
line 8—8 of FIGURE 2.
Referring to the drawing in detail, apparatus of this
invention comprises an end member 10 provided with an
opening 12 therethrough. Enco-mpassing the end mem
ber 10 is a sealing member 14 of any suitable type which
is herein shown 1as being an elas-tomeric O-ring member.
Attached to the end member 10 are a plurality of
spaced-apart parallel ‘arm members 16. The arm mem
bers 16 are connected to an elongate retainer member
20. Within the retainer member 20 are a pair of annular
ribs 22.
In abutting engagement with one of the ribs 22 is a
guide member 24-.
In ‘abutting engagement with the
other rib 22 is a guide member 26. Each of the guide
members 24 and 26 is substantially in the form of a
disc or wheel having a plurality of spokes extending from
a hub portion, as shown in FIGURES 7 and 8. A com
prmsion spring 28 is disposed between ‘the guide mem
Operation
As shown by arrows in FIGURE 5, when the ap
paratus is at a temperature below a given value, ?uid may
pass through the housing ‘501 into the conduit 52 and
through the opening 12 in the end member 10. The
fluid comes into contact with the container 34. When the
valve apparatus is used as ‘a steam trap, air is forced from
the steam line in the manner shown by arrows in FIG
URE 5. However, steam moving into the steam line
forces all of the air from the line and comes into con
tact with the container 34. The steam heats the con
tainer 34 and the expansible-contractible material 36
therewit-hin sufficiently to cause expansion of the material
36. This expansion causes the material 36 to apply pres
sures upon the end of the rod or piston 32 which extends
Within the container 34, as shown in FIGURE 2. These
forces upon the rod 32 urge relative movement between
the rod 32 and the container 34.
As stated above, the rod 32 is threadedly attached to
the tube or sleeve 30. The sleeve 30* is attached to the
65 guide member 26.
The guide member 26 is held in
position by the spring ‘28, which, as stated ‘above, has
greater forces against further compression thereof than
bers 24 and ‘26 and urges these guide members 24 and
does the spring 42. Therefore, as expansive forces with
26 one from the other and against the rib-s 22. The
in the container 34 urge relative movement between the
guide member 26 has a tube or sleeve 31} attached there
to at the central portion thereof. The tube 30‘ slidably ex 70 container 34 and the rod 32, the container 34 is forced
to move toward the end member 10‘ as the spring 42 is
tends through the central portion of the guide member
further compressed. Su?icient movement of the con
24.
3,096,936
4
tainer 34- causes the nose 46 thereof to engage the end
portion and an outer portion, the outer portion of each
guide member being in engagement with the retainer
means, a spring member intermediate the guide members
and in engagement therewith and urging the guide mem
bers in directions one from the other, the retainer means
having abutment means preventing movement of the guide
members beyond a given amount, the guide members
being substantially coaxial one with the other and with
the opening in said closure member, a sleeve attached
member 10, closing the opening 12, as shown in FIGURE
3. Thus, ?uid is restrained against passage through the
opening 12." Therefore, in steam trap operation the
steam is retained within the steam lines after air has
been purged therefrom.
' If the temperature of the steam should increase after
the opening 12 is closed in the manner shown in FIGURE
3, increased forces of the material 36 within the con
tainer 34 urge further relative movement between the
container 34 ‘and the rod 312. Due to the fact that
to the guide member which is closest to the closure mem_
ber, the sleeve slidably extending through the other guide
the container 34 is in engagement with the end member
member and coaxial with the guide members, a rod with
in the tube and attached thereto, the rod extending to
ward the closure member, a container having an end
‘10, there can be no further movement of the container
34 toward the end member 19‘.
Therefore, increased
forces within the ‘container 34- force the rod 3-2 in a 15 portion adjacent the closure member, the rod slidably
direction away from the container 34. This movement of
extending into the container, the container ‘being movable
the rod 32 moves the sleeve 31)‘ which is attached thereto.
with respect to the rod so that the end portion of the
This movement of the sleeve 39‘ moves the guide member
container is engageable with the closure member to close
26 which is attached thereto. The guide member 26,
the opening therethrough, thermal responsive material
moving toward the guide member 24 forces greater corn~ 20 Within the container and in engagement with the rod,
pression of the spring 28. ' The sleeve 30 slidably moves
the thermal responsive material being expansible to apply
through the guide member 24, as shovm in FIGURE 4.
forces directly upon the rod urging relative movement
Thus, the apparatus maintains the steam entrapped wit between the rod and the container, a compression spring
in the steam lines at higher temperatures but the ap
in engagement with the container and the closure member
paratus is not damaged by the increased forces resulting 25 and urging the container in a direction from the closure
therefrom.
v »
member.
The temperature at which the container member 34
2. Fluid control ‘apparatus comprising a conduit hav
begins to move in a direction from the rod 32 to close
ing an end portion, a housing encompassing said end por
the opening 12 of the end member 10‘ may be adjusted
tion of the conduit and attached thereto, valve apparatus
by threadedly rotating the rod 32 to change the posi 30 within the housing and within the conduit, the valve ap
paratus including support structure, a portion of the
support structure being in abutting'relation with the end
tion thereof with respect to the sleeve 39.
As shown in the drawings, the apparatus of this inven
‘tion can be readily and easily disposed within a small
space. The apparatus operates e?icientlyr and e?eotively
to ‘control ?uid within a conduit.
Although the preferred embodiment of the device has
of the conduit and thus positioning the valve apparatus
with respect to the conduit and with respect to‘ the hous
35 ing, a ‘stationary closure member attached to the support
been described, it will be understood that within the pur
view of this invention various changes may be made in
structure, the stationary closure member being within the
conduit and in sealing engagement therewith, the sta
tionary closure member having a passage therethrough, a
the form, details, proportion and arrangement of parts,
movable closure member carried by the support struc
the combination thereof and mode of operation, which 40 ture and engageable with the stationary closure member to
generally stated consist in a device capable of carrying
‘close the passage therethrough, the movable closure mem
out the objects set forth, as disclosed and de?ned in the
ber having a portion provided with a cavity therein,
appended claims.
,
,
thermal responsive material within the cavity, abutment
Having thus described my invention, I claim:
means engageable by the thermal responsive material to
1. A unitary steam trap for insertion within a conduit 45 cause, relative movement between the movable closure
comprising a valve mechanism, the valve mechanism in
member and the stationary closure member upon ex
cluding an annular closure member slidably movable and
pansion of the thermal responsive material.
positionable within the conduit and in sealing engage
ment therewith, the closure member having an opening
, References Cited in the ?le of this patent
therethrough, a plurality of connector members attached 50
' UNITED STATES PATENTS
to the closure member and extending in an axial direc
tion therefrom and adapted to be positioned within the
conduit, retainer means joining all of the connector mem
bers together at positions spaced from the closure mem
ber, ‘a portion of the retainer means being engageable 55
with the conduit, a pair of spaced-apart guide members
retained by the retainer means, the guide members being
relatively movable, each guide member having a central
263,175
Hathaway ____________ __ Aug. 22, 1882
2,795,381
2,797,875
2,923,318
Eskin ______________ __ June 11, 1957
Obermaier ____________ __ July 2, 1957
Monson ______________ __ Feb. 2, 1960
58,786‘
Germany __________ __ Sept. 14, 1891
Germany ____________ __ July 24, 1930‘
FOREIGN PATENTS
506,596
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