US1645700A - Self-cleaning port - Google Patents

Self-cleaning port Download PDF

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Publication number
US1645700A
US1645700A US73680224A US1645700A US 1645700 A US1645700 A US 1645700A US 73680224 A US73680224 A US 73680224A US 1645700 A US1645700 A US 1645700A
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United States
Prior art keywords
port
valve
pressure
seat
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
William B Hodge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parks Cramer Co
Original Assignee
Parks Cramer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US640283A external-priority patent/US1587314A/en
Application filed by Parks Cramer Co filed Critical Parks Cramer Co
Priority to US73680224 priority Critical patent/US1645700A/en
Application granted granted Critical
Publication of US1645700A publication Critical patent/US1645700A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/32—Measuring temperature based on the expansion or contraction of a material the material being a fluid contained in a hollow body having parts which are deformable or displaceable
    • G01K5/42—Measuring temperature based on the expansion or contraction of a material the material being a fluid contained in a hollow body having parts which are deformable or displaceable the body being a bellows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/08—Means for indicating or recording, e.g. for remote indication
    • G01L19/12—Alarms or signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4273—Mechanical cleaning
    • Y10T137/4336—Cleaning member reciprocates in passage
    • Y10T137/4343—By-pass cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y10T137/7768—Pilot controls supply to pressure chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7793—With opening bias [e.g., pressure regulator]
    • Y10T137/7805—Through external pipe

Definitions

  • This invention relates to cleaning devlces for the throttling feed ports of pneumatic devices, and rovides a mechanism intended particularly or use in pneumatic relay motors such as are used in' temperature and humidity controlling systems.
  • the presentapplication is a division of a prior application, VSerial No. 640,283, filed May v19, 1923.
  • the'invention contemplates the use of a motor, subject to the' pressure of t-he air supply, and rendered operative to clean the feed port by a reduction of supply pressure, caused for the purpose, or
  • a thermostatic or hygrostatic valve When the system is in operation air under pressure is constantly fed to the diaphragm chamber through a throttling feed port whose capacity is less than that of the leak port.
  • the closing and opening of the leak port by the thermostat-ic or hygrostatic valve ycauses the alternate distention and collapse of the diaphragm.
  • Such throttling feed ports being quite minute are apt to become clogged with ⁇ dust and scale, and the present invention provides means for cleaning such ports each time the supply pressure is materially reduced, as it is, for example, when the system is shut down.
  • t- Fig. 1 is a section showing the main operative part-s ofthe motor.
  • Fig. 2 is a fragmentary section showing the feed port opened and its contact with the wiper when the air supply is shut oil".
  • the diaphragm motor above referred to consists of a corrugated metal bellows 6, closedE at one end by a fixed head 7 and at the other by a movable head 8.
  • a spring 9 acts against. the head 8, tending to collapse the diaphragm, but the range of collapsing movement is limited by a liange 10 formed on head 8.
  • the head 8 is further provided with a projecting stud 11 which abuts against a valve stem 12.
  • This valve stem 12 passes through Ithrust relation with each other.
  • the stem l of the exhaust valve 20 has an axial recess in which the end of the inlet valve stem seats and is guided, and a spring 21 which ,bears against the inlet valve, serves to close the latter and open the exhaust.
  • Th space above exhaust valve 20 is connected o atmosphere by a pipe 22 which directs the exhausted air to a point of use disclosed in the parent application but not material to the present invention.
  • the space below inlet valve 19 is connected by passage 23 to the compressed air supply pipe 24:.
  • the branch pipe 25 is for a purpose disclosed in the parent application and not material' to the present application, since it merely supplies air under pressure to certain accessory apparatus.
  • the pressure fluid within diaphragm 6 is confined and vented alternately by the openlng and closing of a familiar type 'of leak portto which the pipe 26 leads.
  • a familiar type 'of leak portto which the pipe 26 leads.
  • One embodiment ofthe port with its controlling v alve is illustrated in .the parent applicat1on, but since it is not material to the present invention it is here omitted.
  • the member 27 is supported on a stem 29 which 1s fixed on a head 30, While the head 3() 1s carried by a metallic bellows diaphragm 31.
  • the compressed air supply pipe 24 communicates with the interior of bellows 31 so that when the supply pressure is 011, the valve-like member 27 is drawn down intoa seat 32, formed to receive it. ln this position the groove 28 offers the only path past the member 27.
  • T us whenever the system is shut down the feed groove will be effectively cleaned. Since most such systems are shut down at night the invention provides cleaning at least once each twenty-four hours.
  • a pressure fluid actuated control device of the type requiring a restricted port, of a conical seat memberg. a conical valve-like member adapted to 'pas seat therein and having a channel in its conical fact adapted to serve, when the valvelike member is seated, as said restricted port; means including an abutment subject to supply pressure, and arranged to seat said valve-like member in said .seat fwhen supply pressure is active and to separate the two at other times; and a wiper resiliently mounted in position to wipe said groove as the valve moves nearits fully separated position.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid-Driven Valves (AREA)

Description

Oct. 18, 1927. 1,645,700
w. B. HoDGE:
SELF CLEANNG PORT Original Filed May 19. 19215 v Pateniea oct. 18, 1927..
VUNITED STATES PATENT OFFICE.
WILLIAM B. HODGE, OF CHARLOTTE, NORTH CAROLINA, ASSIGNOR TO PARKS-GRANIER COMPANY, OF FITCHBURG, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.
SELF-CLEANIN G PORT.
Original application filed May 19, 1923, Serial No. 640,283. Divided and this application led September 9, 1924. Serial No. 736,802.
This invention relates to cleaning devlces for the throttling feed ports of pneumatic devices, and rovides a mechanism intended particularly or use in pneumatic relay motors such as are used in' temperature and humidity controlling systems.
The presentapplication is a division of a prior application, VSerial No. 640,283, filed May v19, 1923.
Generally stated the'invention contemplates the use of a motor, subject to the' pressure of t-he air supply, and rendered operative to clean the feed port by a reduction of supply pressure, caused for the purpose, or
5 as an incident to shuttingdown the system.
The relay motors used in temperature and humidity ,regulating systems commonly 1nclude a diaphragm chamber having a leak' port controlled by a thermostatic or hygrostatic valve. When the system is in operation air under pressure is constantly fed to the diaphragm chamber through a throttling feed port whose capacity is less than that of the leak port. Thus the closing and opening of the leak port by the thermostat-ic or hygrostatic valve ycauses the alternate distention and collapse of the diaphragm.
Such throttling feed ports being quite minute are apt to become clogged with `dust and scale, and the present invention provides means for cleaning such ports each time the supply pressure is materially reduced, as it is, for example, when the system is shut down. v
`The application of the invention to a known type of relay motor used in temperature and humidity regulation is illustrated inl the accompanying drawing, in which t- Fig. 1 is a section showing the main operative part-s ofthe motor.
Fig. 2 is a fragmentary section showing the feed port opened and its contact with the wiper when the air supply is shut oil".
The diaphragm motor above referred to consists of a corrugated metal bellows 6, closedE at one end by a fixed head 7 and at the other by a movable head 8. A spring 9 acts against. the head 8, tending to collapse the diaphragm, but the range of collapsing movement is limited by a liange 10 formed on head 8.
The head 8 is further provided with a projecting stud 11 which abuts against a valve stem 12. This valve stem 12 passes through Ithrust relation with each other. The stem l of the exhaust valve 20 has an axial recess in which the end of the inlet valve stem seats and is guided, and a spring 21 which ,bears against the inlet valve, serves to close the latter and open the exhaust. Th space above exhaust valve 20 is connected o atmosphere by a pipe 22 which directs the exhausted air to a point of use disclosed in the parent application but not material to the present invention. The space below inlet valve 19 is connected by passage 23 to the compressed air supply pipe 24:.
The branch pipe 25 is for a purpose disclosed in the parent application and not material' to the present application, since it merely supplies air under pressure to certain accessory apparatus.
The pressure fluid within diaphragm 6 is confined and vented alternately by the openlng and closing of a familiar type 'of leak portto which the pipe 26 leads. One embodiment ofthe port with its controlling v alve is illustrated in .the parent applicat1on, but since it is not material to the present invention it is here omitted.
To operate a motor of the above described type air must be supplied constantly to the iaphragm chamber at a rate less than the outflow capacity of the lea-k port, by the use of a restricted feed port. According to the present invention I form this port on the side of a movable valve-like member 27, the port consisting of a groove 28.
The member 27 is supported on a stem 29 which 1s fixed on a head 30, While the head 3() 1s carried by a metallic bellows diaphragm 31. The compressed air supply pipe 24 communicates with the interior of bellows 31 so that when the supply pressure is 011, the valve-like member 27 is drawn down intoa seat 32, formed to receive it. ln this position the groove 28 offers the only path past the member 27.
TVhen the supply pressure is materially reduced or shut 'oft' a spring 33 acting ward movement of rod 29 is limited by a flan e 36 within bellows 3l.
T us whenever the system is shut down, the feed groove will be effectively cleaned. Since most such systems are shut down at night the invention provides cleaning at least once each twenty-four hours.
What is claimed is:
1. IThe combination with a'pressure fluid actuated control device of the relay motor type requiring a restricted port, which serves as a feed port for said relay motor of a valve like member and a seat therefor, one of which is formed'at its seating area with a groove arranged to serve, when the two are in contact, assaid restricted port; and means including an abutment subject to supply pressure Vand arranged to seat said valve like member in'said seat when supply pres sure is active, and to separate the two at other times. f
2. The combination with a pressure fluid actuated control device of the type requiring a restricted port, of a conical seat memberg. a conical valve-like member adapted to 'pas seat therein and having a channel in its conical fact adapted to serve, when the valvelike member is seated, as said restricted port; means including an abutment subject to supply pressure, and arranged to seat said valve-like member in said .seat fwhen supply pressure is active and to separate the two at other times; and a wiper resiliently mounted in position to wipe said groove as the valve moves nearits fully separated position.
3. The combination with an automatic control device of the pressure fluid actuated type, including a restricted port formed between two relatively movable members; an \abutment subject to the pressure of pressure fluid supply in one direction and connected to produce movement of said members upon ing means acting on said abutment in oppo y'-sition to said supply pressure. j
5. The combination with an automatic control device'of the relay motor type, of a seat; a head adapted to sealv against said seat and having a groove on its seating face which serves as a restricted feed port for pressure fluid to said control device; an abutment subject to the pressure of fluid supplyl and connected with said head to move the same upon changes of pressure of mo- -tive Huid supply; a wiper mounted in a po-V sition to engage said head and the groove therein as the head rmoves away from said seat; and resilient means urging said abutment in opposition to said fluid pressure.
In testimony whereof I have'signed my name to thisspecification.
, W'ILLIAM B. HODGE.
Yso
US73680224 1923-05-19 1924-09-09 Self-cleaning port Expired - Lifetime US1645700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US73680224 US1645700A (en) 1923-05-19 1924-09-09 Self-cleaning port

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US640283A US1587314A (en) 1923-05-19 1923-05-19 Hygroscopic regulating device
US73680224 US1645700A (en) 1923-05-19 1924-09-09 Self-cleaning port

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667180A (en) * 1951-01-23 1954-01-26 Westinghouse Air Brake Co Control valve device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667180A (en) * 1951-01-23 1954-01-26 Westinghouse Air Brake Co Control valve device

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