US1022157A - Flap-valve. - Google Patents

Flap-valve. Download PDF

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Publication number
US1022157A
US1022157A US1911642327A US1022157A US 1022157 A US1022157 A US 1022157A US 1911642327 A US1911642327 A US 1911642327A US 1022157 A US1022157 A US 1022157A
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United States
Prior art keywords
valve
plates
seat
ports
spring
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
Clarence N Scott
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.)
INTERNATIONAL STEAM PUMP Co
INT STEAM PUMP CO
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INT STEAM PUMP CO
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Filing date
Publication date
Application filed by INT STEAM PUMP CO filed Critical INT STEAM PUMP CO
Priority to US1911642327 priority Critical patent/US1022157A/en
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Publication of US1022157A publication Critical patent/US1022157A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
    • 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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
    • F16K15/161—Check valves with flexible valve members with tongue-shaped laminae with biasing means in addition to material resiliency, e.g. spring
    • 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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/1401—Check valves with flexible valve members having a plurality of independent valve members
    • 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
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
    • F16K15/162—Check valves with flexible valve members with tongue-shaped laminae with limit stop
    • 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
    • F16K2200/00—Details of valves
    • F16K2200/20—Common housing having a single inlet, a single outlet and multiple valve members
    • F16K2200/203—Common housing having a single inlet, a single outlet and multiple valve members in parallel
    • 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]
    • Y10T137/7838—Plural
    • 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]
    • Y10T137/7859—Single head, plural ports in parallel
    • 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]
    • Y10T137/7879—Resilient material valve
    • Y10T137/7888—With valve member flexing about securement
    • Y10T137/7891—Flap or reed
    • Y10T137/7892—With stop

Definitions

  • This invention relates to an improved flap valve intended especially for use in large compressors or blowing engines, but generally applicable for flap valve uses and with either liquids or gases.
  • flap valves formed of elastic plates are commonly used, which are opened by the air pressure and of suflicient elasticity to seat after the discharge stroke.
  • a serious difficulty in such valves results from the fact that it is connnereially impracticable to secure perfectly flat plates, the rolling of the plates resulting in curvature in both directions so thatthe plates ma best be described as buckled.
  • the resul is that the valves will notlie flat against the seats, and when forced against the seats by pressure an abnormal stress is set up in the valve plate, which applied frequently soon results in plate fracture.
  • valves with flat valve seats are not under sutlicient tension to seat before the piston reverses, so that they are then seated with considerable force by the air pressure which racks the valves and is liable to cause the corners of the valve plates to break off.
  • the valve plates with flat valve seats are subject to reversal of stress, the outer fibers being alternately under and relieved from tension or compression, resulting in weakening and shortening the life of the buckled valve plates.
  • the curved seat With the curved seat, the initial spring tension on the valve plates is increased, thus securing the seating of the valve when the piston has completed Specification of Letters Patent.
  • the spring plate backing aids, also, in seating the valves and tends to reduce the bucklein the valve plates.
  • the ill effects of stresses in buckled plates are minimized or overcome, largely because there is no reversal of stress in the valve plates, the outer fibers of the plate toward the seat being always in tension, and the outer fibers toward the guard being always in compression, whether the valve is open or closed, so that the ,only efi'ect of opening the valve is to increase these stresses.
  • Figure 1 is a cross section through the valves, valve seats and guards.
  • Fig. 2 is a longitudinal section on the line 2 of Fig. 1.
  • Fig. 3 is a horizontal section on the line 3 of Fig.l.-
  • A is the valve head having passages 10 and valve seats 11, the latter being divided intocomparatively narrow ports a forming a multiported seat, and B the curved guards or abutments against which the valves open, these guards being carried by supports (L
  • the valves 1) are formed of spring plates of such length as to extend over and close the series of ports at. These are shown as formed of a single plate, but, with the usual pressures, maybe and preferably will be formed of a number of thin plates to secure the desired elasticity.
  • the construction thus far described is of well-known type, but may be of any other suitable construction.
  • valve seat 11 instead of being flat, as usual, so that the valve 15 not under tension when closed, is curved widthwise of the valve so that the valve is bent outward or toward the guard, and under tension when closed, and the valve plates 6 are backed by spring plates under tension to press upon and close the valve, four of these plates being shown, 0', c c 0.
  • These plates 0 c 0 c are preferably of different widths as shown, so
  • valve plates and backing plates are shown as secured together between the guards and valve supports 13 by pins passing through openings in the base of the plates, as usual with valve plates in constructions of this type, but it will be understood that they may be mounted in any other suitable manner.
  • a valve seat slot-ted to form a plurality of ports and curved to maintain the valve under tension when closed, in combination with an elastic plate extending over the series of ports and unslotted so as to form. a continuous plate valve controlling the series of ports.
  • a valve seat slotted to form. a plurality of ports and curved tomaintain the valve under tension when closed, in combination with an elastic plate extending over the sgries of ports and unslotted so as to form a continuous. plate valve controlling the series of ports, and a spring plate backing pressingthe valve toward its seat.
  • valve seat slotted to form a plurality of ports and curved to maintain the .valve under tension when closed, in combination with an elasticplate extending over the series of ports and unslotted so as .to form a continuous plate valve controlling the series of ports, and a spring plate backing formed of a series of spring plates of widths decreasing from the free edge ofthe valve plate and pressing the valve toward its seat.
  • a flap valve the combination with a valve seat, slotted to form a series of ports, of an elastic plate extending over the series of ports and unslotted so as to form a continuous plate valve controlling the series of ports, and a spring backing formed of a series of spring plates pressing the valve toward its seat.
  • a flap valve the combination with a valve seat, slotted to form a series of ports, of a valve formed of an elastic plate extending over the series of ports and unslotted so as to form a continuous plate valve controlling the series of ports, and a spring backing consisting ofaseries of spring plate fingers'pressing the valve toward'its seat,

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Description

Patented Apr. 2, 1912.
' 'nnrrnn s'ra'rne earner canton.
CLARENCE N. SCOTT, 0F HOUSTON, TEXAS, ASSIGNOR TO INTERNATIONAL STEAM PUMP COMPANY, A CORPORATION OF NEW JERSEY.
FLAP-VALVE.
Application filed August 4, 1911.
To all whom it may concern:
Be it known that I, CLARENCE N. Soon, a subject of the King of Great Britain, residing at Houston, county of Harris, and State of Texas, have invented certain new and useful Improvements in Flap-Valves, fully described and represented in the following-specification and the accompanying drawings, forming a part of the same.
This invention relates to an improved flap valve intended especially for use in large compressors or blowing engines, but generally applicable for flap valve uses and with either liquids or gases.
In the present blowing engine practice, flap valves formed of elastic plates are commonly used, which are opened by the air pressure and of suflicient elasticity to seat after the discharge stroke. A serious difficulty in such valves results from the fact that it is connnereially impracticable to secure perfectly flat plates, the rolling of the plates resulting in curvature in both directions so thatthe plates ma best be described as buckled. The resul is that the valves will notlie flat against the seats, and when forced against the seats by pressure an abnormal stress is set up in the valve plate, which applied frequently soon results in plate fracture. Moreover, the valves with flat valve seats are not under sutlicient tension to seat before the piston reverses, so that they are then seated with considerable force by the air pressure which racks the valves and is liable to cause the corners of the valve plates to break off. The valve plates with flat valve seats, moreover, are subject to reversal of stress, the outer fibers being alternately under and relieved from tension or compression, resulting in weakening and shortening the life of the buckled valve plates. I avoid these difliculties, and greatly lengthen the life of the valve plates, by using a curved seat and backing the valve plates with one or more spring plates pressing upon the valve, several of these spring plates preferably being used and decreasing in width, so that the pressure of the spring plates decreases toward the free edge of the valve, and these spring plates are preferably cut away to form fingers extending toward the free edge of the valve. With the curved seat, the initial spring tension on the valve plates is increased, thus securing the seating of the valve when the piston has completed Specification of Letters Patent.
Patented Apr. 2, 1912.
Serial No. 642,327.
its discharge stroke, and prevents air pressure from seating the valveswith consequent liability to breakage. The spring plate backing aids, also, in seating the valves and tends to reduce the bucklein the valve plates. The ill effects of stresses in buckled plates are minimized or overcome, largely because there is no reversal of stress in the valve plates, the outer fibers of the plate toward the seat being always in tension, and the outer fibers toward the guard being always in compression, whether the valve is open or closed, so that the ,only efi'ect of opening the valve is to increase these stresses.
In the accompanyingdrawings forming part of this specification, the invention is illustrated as applied in a valve construction of common blowing engine type, and this construction will now be described in detail, and the features forming the invention then specifically pointed out in the claims.
In the drawings, Figure 1 is a cross section through the valves, valve seats and guards. Fig. 2 is a longitudinal section on the line 2 of Fig. 1. Fig. 3 is a horizontal section on the line 3 of Fig.l.-
Referring to the drawings, A is the valve head having passages 10 and valve seats 11, the latter being divided intocomparatively narrow ports a forming a multiported seat, and B the curved guards or abutments against which the valves open, these guards being carried by supports (L The valves 1) are formed of spring plates of such length as to extend over and close the series of ports at. These are shown as formed of a single plate, but, with the usual pressures, maybe and preferably will be formed of a number of thin plates to secure the desired elasticity. The construction thus far described is of well-known type, but may be of any other suitable construction.
Referring now to the features of the present invention, the valve seat 11, instead of being flat, as usual, so that the valve 15 not under tension when closed, is curved widthwise of the valve so that the valve is bent outward or toward the guard, and under tension when closed, and the valve plates 6 are backed by spring plates under tension to press upon and close the valve, four of these plates being shown, 0', c c 0. These plates 0 c 0 c, are preferably of different widths as shown, so
that the desired elasticity of the combined valve plates and backing plates is secured, and these backing plates are preferably cut away to form a series of spring fingers acting on the valve plates. Ihe valve plates and backing plates are shown as secured together between the guards and valve supports 13 by pins passing through openings in the base of the plates, as usual with valve plates in constructions of this type, but it will be understood that they may be mounted in any other suitable manner.
It will be understood that the curved seats with plate valves under tension when closed may beused without the spring back ing plates, and such use is within the invention, but the spring backing plates secure important results in avoiding the ill.
effects of buckled valve plates, and undue wear and liability to breakage of the valves when seating, and the combination of the two features is important in enabling large valve plates to be used without the ill efiects of buckling, and in lengthening the life of such valve plates.
What I claim is:
1. In a flap valve, a valve seat slot-ted to form a plurality of ports and curved to maintain the valve under tension when closed, in combination with an elastic plate extending over the series of ports and unslotted so as to form. a continuous plate valve controlling the series of ports.
2. In a flap valve, a valve seat slotted to form. a plurality of ports and curved tomaintain the valve under tension when closed, in combination with an elastic plate extending over the sgries of ports and unslotted so as to form a continuous. plate valve controlling the series of ports, and a spring plate backing pressingthe valve toward its seat.
3. In flap valve, a valve seat slotted to form a plurality of ports and curved to maintain the .valve under tension when closed, in combination with an elasticplate extending over the series of ports and unslotted so as .to form a continuous plate valve controlling the series of ports, and a spring plate backing formed of a series of spring plates of widths decreasing from the free edge ofthe valve plate and pressing the valve toward its seat.
L'In a flap valve, a valve seat slotted 'to form a plurality of ports and curved to ward .its seat.
5. In a flap valve, the combination with a valve seat curved to maintain the valve under tension when closed, of an unslotted elastic plate valve, and a spring plate backing pressing the valve toward its seat.
6. In a flap valve, the combination with a valve seat curved to maintain the valve under tension when closed, of an unslotted elastic plate valve, and a spring plate backing pressing the valve toward its seat, and consisting of series of spring plate fingers.
7. In a flap valve, the combination with a valve seat, slotted to form a series of ports, of an elastic plate extending over the series of ports and unslotted so as to form a continuous plate valve controlling the series of ports, and a spring backing formed of a series of spring plates pressing the valve toward its seat.
8. In a flap valve, the combination with a valve seat, slotted to form a series of ports, of a valve formed of an elastic plate extending over the series of ports and unslotted so as to form a continuous plate valve controlling the series of ports, and a spring backing consisting ofaseries of spring plate fingers'pressing the valve toward'its seat,
In testimony whereof, I have hereunto set my hand, in the presence of two subscribing G. W. GRAY, Bum. E. HULL.
. witnesses.
US1911642327 1911-08-04 1911-08-04 Flap-valve. Expired - Lifetime US1022157A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421839A (en) * 1944-01-28 1947-06-10 United Aircraft Corp Gas valve
US2496834A (en) * 1944-01-28 1950-02-07 United Aircraft Corp Gas valve construction
US2505757A (en) * 1945-04-24 1950-05-02 James Y Dunbar High capacity, low inertia check valve for jet propulsion motors
US2590976A (en) * 1947-05-15 1952-04-01 United Aircraft Corp Splitter vane construction for gas valves
US2689552A (en) * 1950-09-11 1954-09-21 Elmer C Kiekhaefer Reed valve for internal-combustion engines
DE1164776B (en) * 1958-11-21 1964-03-05 Enfo Grundlagen Forschungs Ag Flap valve
US3490207A (en) * 1966-07-14 1970-01-20 W W Sly Mfg Co Dust collector
US20120227847A1 (en) * 2009-11-18 2012-09-13 Zahroof Corp. Systems and Methods for a Reed Valve Module and Valve Assembly
US10995866B2 (en) 2017-06-30 2021-05-04 Zahroof Valves Inc. Stacked valve assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421839A (en) * 1944-01-28 1947-06-10 United Aircraft Corp Gas valve
US2496834A (en) * 1944-01-28 1950-02-07 United Aircraft Corp Gas valve construction
US2505757A (en) * 1945-04-24 1950-05-02 James Y Dunbar High capacity, low inertia check valve for jet propulsion motors
US2590976A (en) * 1947-05-15 1952-04-01 United Aircraft Corp Splitter vane construction for gas valves
US2689552A (en) * 1950-09-11 1954-09-21 Elmer C Kiekhaefer Reed valve for internal-combustion engines
DE1164776B (en) * 1958-11-21 1964-03-05 Enfo Grundlagen Forschungs Ag Flap valve
US3490207A (en) * 1966-07-14 1970-01-20 W W Sly Mfg Co Dust collector
US20120227847A1 (en) * 2009-11-18 2012-09-13 Zahroof Corp. Systems and Methods for a Reed Valve Module and Valve Assembly
US9989161B2 (en) * 2009-11-18 2018-06-05 Zahroof Valves, Inc. Systems and methods for a reed valve module and valve assembly
US11002377B2 (en) 2009-11-18 2021-05-11 Zahroof Valves Inc. Systems and methods for a reed valve module and a modular reed valve assembly
US10995866B2 (en) 2017-06-30 2021-05-04 Zahroof Valves Inc. Stacked valve assembly

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