US1201425A - Check-valve. - Google Patents

Check-valve. Download PDF

Info

Publication number
US1201425A
US1201425A US1914859644D US1201425A US 1201425 A US1201425 A US 1201425A US 1914859644 D US1914859644 D US 1914859644D US 1201425 A US1201425 A US 1201425A
Authority
US
United States
Prior art keywords
valve
pressure
chamber
check
piston
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
Application number
Inventor
Edward V Anderson
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to US1914859644 priority Critical patent/US1201425A/en
Application granted granted Critical
Publication of US1201425A publication Critical patent/US1201425A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/785—With retarder or dashpot
    • Y10T137/7852—End of valve moves inside dashpot chamber
    • Y10T137/7853—Enlarged piston on end of valve stem
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7908—Weight biased
    • Y10T137/7909—Valve body is the weight
    • Y10T137/7913—Guided head
    • Y10T137/7915—Guide stem

Definitions

  • My invention relates particularly to large valves for service with steam boilers, etc., and its primary object is to provide a con struction of non-return valve efliciently cushioned in both movements and certain in operation, and provided with means for testing it in actual service without the usual manual operation.
  • the drawing shows a partial elevation and partial vertical central section of a valve and a testing device.
  • non-return valves It is customary to employ non-return valves on top of the boilers of steam plants and it is highly desirable that they should be automatic, perfectly cushioned and under complete control.
  • nonreturn valves As heretofore made nonreturn valves have been provided with a hand screw for closing them, and the attendant could never know whether they were in operating order except by this hand manipulation.
  • the cushioning of such. valves has been a great difliculty and owing to the possibility of detritus collecting in the cushioning chambers it has been diflicult to know with certainty. when the apparatus is in good working order and when not.
  • Such valves have usually been operated by the live or boiler pressure, and not by the pressure from the delivery side, with the result that when the valve closes there is a leakage back from the header to the boiler.
  • valve casing 1 with an inlet opening (A) and outlet opening (B) and in the central partition at, I place a valve 5 on-a stem 8 which rides in the center of the diaphragm 6 formed as part of a cylinder 7 located in the hood 2 and covered by a cap 3.
  • a piston 14 Fixed on the valve stem 8 I provide a piston 14 having a small port (15).
  • the usual screw shaft 9 and handwheel 10 for closing the valve.
  • the live pressure in the space (A) lifts livery side.
  • a non-return valve comprising the combinationof a casing, an imperforate valve, a valve stem and a piston thereon, a cylinder containing said piston, ports to supply pressure to both sides of said piston directfrom the delivery side of the valve, and a valved port to exhaust pressure on one side of the piston to thereby close the valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)

Description

E. V. ANDERSON.-
CHECK VALVE.
APPLICATION FILED SEPT. 1, I914. I
1,201,425. Patented Oct 17,1916.
INVENTOR nnirnn srarns ra'rnnr ornrcn.
EDWARD V. ANDERSON, OF MONESSON, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO CHARLES E. GOLDEN, OF GRAFTON, PENNSYLVANIA.
CHECK-VALVE.
Specification of Letters Patent.
Patented Oct. 1'7, 1916.
To all whom it may concern Be it known that I, EDWARD V. ANDERSON, a citizen of the United States, residing at Monesson, in the State of Pennsylvania, have invented certain new and useful Improvements in Check-Valves, of which the following is a specification.
My invention relates particularly to large valves for service with steam boilers, etc., and its primary object is to provide a con struction of non-return valve efliciently cushioned in both movements and certain in operation, and provided with means for testing it in actual service without the usual manual operation.
The drawing shows a partial elevation and partial vertical central section of a valve and a testing device.
It is customary to employ non-return valves on top of the boilers of steam plants and it is highly desirable that they should be automatic, perfectly cushioned and under complete control. As heretofore made nonreturn valves have been provided with a hand screw for closing them, and the attendant could never know whether they were in operating order except by this hand manipulation. The cushioning of such. valves has been a great difliculty and owing to the possibility of detritus collecting in the cushioning chambers it has been diflicult to know with certainty. when the apparatus is in good working order and when not. Such valves have usually been operated by the live or boiler pressure, and not by the pressure from the delivery side, with the result that when the valve closes there is a leakage back from the header to the boiler.
In my construction I provide the valve casing 1 with an inlet opening (A) and outlet opening (B) and in the central partition at, I place a valve 5 on-a stem 8 which rides in the center of the diaphragm 6 formed as part of a cylinder 7 located in the hood 2 and covered by a cap 3. Fixed on the valve stem 8 I provide a piston 14 having a small port (15). Above the valve stem 8 is the usual screw shaft 9 and handwheel 10 for closing the valve. Communicating with the space (D), and by a port larger than the port (15), I attach a test pipe 12, which may be run to any distant or convenient point and is provided with a valve 13.
The live pressure in the space (A) lifts livery side.
the valve 5 and it is cushioned in such movement both by compression in the chamber (C), and by suction in the small chamber (E) formed in the bottom of the cylinder head 6. This cushioning effect is thus increased just as the valve 5 either leaves or approaches the seat. The chamber (C) issupplied from the delivery side through the duct 11 and the communication from chamber (C) to chamber (D) will of course eventually balance the piston 14 and the valve will remain open unless there is back pressure. It will be seen however, that by suddenly releasing the pressure in the chamber (D) the header pressure in the chamber (C) will operate to close the valve which is cushioned both by compression in chamber (D) and at the limit of motion, by compression in chamber The valve when closed prevents any leakage back toward the inlet side (A). The pipe 12 and valve 13 therefore afford means for testing the main valve in service at any time and with cer tainty, and by use of the pressure on the de- The advantages of this constructionwill readily occur to those familiar with the art.
Having thus described and illustrated the use of my invention, what I claim is the following:
1. A non-return valve comprising the combinationof a casing, an imperforate valve, a valve stem and a piston thereon, a cylinder containing said piston, ports to supply pressure to both sides of said piston directfrom the delivery side of the valve, and a valved port to exhaust pressure on one side of the piston to thereby close the valve.
- 2. The combination with a double cushioned imperforate non-return valve, having a cylinder and pistonv dashpot cushioning means and means to normally balance the pressure by fluid direct from the delivery side on the two sides of the said piston, of a valve escapement port adapted to unbalance the pressure on said piston and close the valve, substantially as described.
In testimony whereof I have hereunto signed my name in the'presence of the two subscribed witnesses.
EDWARD .V. ANDERSON. lVitnesses:
FREDK STAUB, W. A. HECKMAN.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.
Washington, I). 0.,
US1914859644 1914-09-01 1914-09-01 Check-valve. Expired - Lifetime US1201425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1914859644 US1201425A (en) 1914-09-01 1914-09-01 Check-valve.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1914859644 US1201425A (en) 1914-09-01 1914-09-01 Check-valve.

Publications (1)

Publication Number Publication Date
US1201425A true US1201425A (en) 1916-10-17

Family

ID=3269365

Family Applications (1)

Application Number Title Priority Date Filing Date
US1914859644 Expired - Lifetime US1201425A (en) 1914-09-01 1914-09-01 Check-valve.

Country Status (1)

Country Link
US (1) US1201425A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843148A (en) * 1955-04-05 1958-07-15 Buckeye Iron & Brass Works Soft closing nozzle valve
US3556463A (en) * 1968-10-08 1971-01-19 Worthington Corp Trip valve system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843148A (en) * 1955-04-05 1958-07-15 Buckeye Iron & Brass Works Soft closing nozzle valve
US3556463A (en) * 1968-10-08 1971-01-19 Worthington Corp Trip valve system

Similar Documents

Publication Publication Date Title
US1201425A (en) Check-valve.
US933147A (en) Cylinder relief-valve.
US544950A (en) boucher
US391807A (en) Pressure-reducing valve
US715707A (en) Safety-valve.
US2598630A (en) Back-pressure valve
US494207A (en) Steam-pump
US230828A (en) Relief-valve
US323144A (en) Valve
US474711A (en) Relief-valve
US727484A (en) Valve.
US148565A (en) Improvement in valve-gears for combined high and low pressure engines
US756903A (en) Fluid-pump.
US839912A (en) Compression and vacuum relief-valve.
US1356130A (en) Valve
US646292A (en) Safety-valve for water-feed pipes.
US238685A (en) Puppet-valve
US225018A (en) John e
US416072A (en) Compressor-pump for refrigerating-machines
US122059A (en) Improvement in automatic double puppet-valves
US260217A (en) Basin-bib
US138077A (en) Improvement in combined stop-cocks, check-valves, and blow-offs
US111341A (en) Improvement in valves for steam-pumps
US508495A (en) William c
US141343A (en) Improvement in steam-engines