US382643A - Safety-valve - Google Patents

Safety-valve Download PDF

Info

Publication number
US382643A
US382643A US382643DA US382643A US 382643 A US382643 A US 382643A US 382643D A US382643D A US 382643DA US 382643 A US382643 A US 382643A
Authority
US
United States
Prior art keywords
valve
pressure
steam
valves
safety
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
Publication date
Application granted granted Critical
Publication of US382643A publication Critical patent/US382643A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/02Check valves with guided rigid valve members
    • F16K15/025Check valves with guided rigid valve members the valve being loaded by a helicoidal spring
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7758Pilot or servo controlled
    • Y10T137/7762Fluid pressure type
    • Y10T137/7764Choked or throttled pressure type
    • Y10T137/7765Pilot valve within main valve head
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7781With separate connected fluid reactor surface
    • Y10T137/7832Plural valves biased closed
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86928Sequentially progressive opening or closing of plural valves

Description

(No Model.) y'

` W. R. FOX.

SAFETY VALVE.- l No. 382,643.v K .Patermed May 8, 1 888gm w Il@ IIIIIIHIIH lllillllllllllll ,ITJ fr UNITEDv STATES v PATENT Grrrca WILLIAM It.l FOX, OF GRAND RAPIDS, MICHIGAN.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 382,643, dated May 8,1888.

Application led September 20, 1887. Serial No. 250,236. `(No modeL To @ZZ whom, it may concern:- e

Be it known that I, WILLIAM R. Fox, of Grand Rapids, in the county of Kent and State of Michigan, have invented a new and useful Improvement in Safety-Valves; and Ido hereby declare that the following is a full, clear, and exact description of the same.

It is the object of my invention to provide a safety-valve composed of a main and a supplemental valve, and to adapt both valves to be kept to their seats wholly by regulated pressure against the pressure of the steam,the supplemental valve being adapted to operate before the main valve, the steam-pressureoperating to open both valves.

The accompanying drawing, which illus-V trates the best embodiment of my invention,

represents a central longitudinal section ofthe valve. l A

In this drawing, the main valve B is seated in the lower end of a tubular casing, A,which is threaded for making the proper steamcon nection. The valve has a hollow stem, B, which extends up through a screw-plug, m, in the cap Mof the case. It passes, also,through a diaphragm, D, fitted tightly within the case and resting on a shoulder, so as to prevent steam from passing from the space above the diaphragm into the lower part of the case. Above this diaphragm the stem-.of the valve carries a piston, B2, fitting closely within the case, and larger in diameter than the diameter of the valve. Within this hollow stem is a supplemental valve,C, seated within the stem at a point just above the position of the dia phragm D when the valve B is on its seat.

The stem of this valve passes up -through a threaded plug,l-n,whieh bears on a spring, L, coiled aboutthe stem with its lower end resting on the valve C. Another spring, K, is coiled about the hollow stem, with its lower end bearing upon the piston B2 and its upper end against the plug m. These two plugs serve to adjust the tension of the springs. In the casing are openings H yfrom the chamber Eto the atmosphere, the chamber E being between the valve-seat and the diaphragm D; so that when the valve B is raised the. steam escapes freely through the openings H. There are also ports Iin the hollow stem B,opening into the chamber F,which is between the diaphragm D and the piston B2.

Supposing now it be desired to setthe vaLve vt'o blow off at fifty pounds pressure, the spring K, which directly controls the main valve, is set at, say fifty-five pounds, or some point above the pressure which is desired. The spring L of the supplemental valve 'is set at fifty. When, therefore, the lpressure rises above fifty,it lifts thevvalve C', which allows 6o the steam to escape in the chamber F and to l act upon the piston B2, which, by reason" of its greater diameter, receives alarger amount of pressure andis lifted, thus raising the valve B; When the pressure falls below the limit ot' 65 fifty pounds,the valve C will close,cutting off the supplyof steam from the chamber F and removing the pressure from the piston B2, leaving the spring K to exert its force and close the valve B. a. It will be seen that by the construction above described I keep both valves to their seats by aregulated pressure (either by the springs shown or .their equivalents) acting directly. against the pressure of the steam,while in all other valves of which I am aware the pressure of the steam has been utilized wholly or in part to keep the valve or valves to their, seats, andsuch an arrangement would defeat the very object aimed at in my invention, which is to' provide a safetyvalve composed of a mainandy supplemental valve under independent tension acting against the steam-pressure,one bes ing set under less tension than the other, but both being adapted `to be lifted from their seats when a certain pressure is reached, so that even in case one should refuse to work this would in no wise interfere with the working of the other. n

It will of course be understood that` I do not limitmyself to springs to keep the valves upon their seats by regulated pressure, asI may use weights as an equivalent for the springs.

Having thus described my invention, what I claim is'- l. In combination, the chamber A, a main valve having a hollow stem, a piston, B2, carried thereby withinl the closed chamber, a spring for closing said valve, an independent valve and spring within thehollow stem, said spring being of less tension than the spring of the main valve, and openings between said stem and the space below the piston Bwhereby,wl1en the supplemental valve islifted,st eam roo is admitted below the piston to operate the' same, substantially as described.

2. In eombination,the case A,the main valve B', having a hollow stem, a piston, B2, carried thereby and inclosed within the case A, a spring for operating the valveB' against steanr pressure, a diaphragm, D, a chamber, F, between it and the piston B2, openings from the hollow stem to the chamber F, a valve for controlling the entrance of steam to said chamber, and a chamber, E, with openings for the blowing 0H of steam,substantially as described.

3. In a safety-valve, the main valve having ahollow stem,and a supplemental valve within the hollow stem, said valves being kept to their seats against the pressure of the steam by independent springs varying in tension, the steam-pressure operating to open both Valves, but one in advance of the other, by reason of the variation in the tension of the springs, substantially as described.

4. A safety-valve consisting of a main valve and a supplemental valve, both valves being kept to their seats wholly by regulated pressure against the pressure of the steam, the steam-pressure operating to open both valves.

5. In a safety-valve, the main valve having a hollow stem, a supplemental valve within the stem, and pressure-springs or their equivalents for the valves, whereby they are held to their seats, and devices for regulating the said pressure against the steam-pressure, the said steamepressure operating to open both valves.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM R. FOX.

Vitnesses:

E. W. TOWER, M. W. FISHER.

US382643D Safety-valve Expired - Lifetime US382643A (en)

Publications (1)

Publication Number Publication Date
US382643A true US382643A (en) 1888-05-08

Family

ID=2451636

Family Applications (1)

Application Number Title Priority Date Filing Date
US382643D Expired - Lifetime US382643A (en) Safety-valve

Country Status (1)

Country Link
US (1) US382643A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2520893A (en) * 1944-03-16 1950-08-29 Merit Engineering Inc Relief valve
US2580127A (en) * 1944-09-14 1951-12-25 Denison Eng Co Pressure relief valve means
US2616259A (en) * 1947-07-15 1952-11-04 Gerotor May Corp Hydraulic system, including multiple motors and controls therefor
US2638116A (en) * 1947-07-07 1953-05-12 Luther E Brown Valve assembly
US2664102A (en) * 1948-03-19 1953-12-29 Dresser Equipment Company Hydraulic pumping system and by-pass valve therefor
US2669330A (en) * 1948-11-05 1954-02-16 New Prod Corp Hydraulic control for steering clutches
US2712220A (en) * 1951-05-19 1955-07-05 Boldridge Austin Gallatin Apparatus for generating power by combining the combustion of a fuel-air mixture with steam
US3123093A (en) * 1964-03-03 Minimum pressure delivery valve assembly
US3211095A (en) * 1959-08-21 1965-10-12 Commercial Solvents Corp Blasting cartridges
US3277920A (en) * 1963-11-05 1966-10-11 Gen Metals Corp Engine relief and testing valve
US4248265A (en) * 1978-11-13 1981-02-03 Halliburton Services Adjustable relief valve
US4958656A (en) * 1989-06-29 1990-09-25 Dresser Industries, Inc. Pressure relief valve
WO2018054885A1 (en) * 2016-09-21 2018-03-29 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Minimum pressure valve for a screw compressor for a vehicle, in particular a utility vehicle
US20180224010A1 (en) * 2015-09-18 2018-08-09 Shimadzu Corporation Pressure control valve

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123093A (en) * 1964-03-03 Minimum pressure delivery valve assembly
US2520893A (en) * 1944-03-16 1950-08-29 Merit Engineering Inc Relief valve
US2580127A (en) * 1944-09-14 1951-12-25 Denison Eng Co Pressure relief valve means
US2638116A (en) * 1947-07-07 1953-05-12 Luther E Brown Valve assembly
US2616259A (en) * 1947-07-15 1952-11-04 Gerotor May Corp Hydraulic system, including multiple motors and controls therefor
US2664102A (en) * 1948-03-19 1953-12-29 Dresser Equipment Company Hydraulic pumping system and by-pass valve therefor
US2669330A (en) * 1948-11-05 1954-02-16 New Prod Corp Hydraulic control for steering clutches
US2712220A (en) * 1951-05-19 1955-07-05 Boldridge Austin Gallatin Apparatus for generating power by combining the combustion of a fuel-air mixture with steam
US3211095A (en) * 1959-08-21 1965-10-12 Commercial Solvents Corp Blasting cartridges
US3277920A (en) * 1963-11-05 1966-10-11 Gen Metals Corp Engine relief and testing valve
US4248265A (en) * 1978-11-13 1981-02-03 Halliburton Services Adjustable relief valve
US4958656A (en) * 1989-06-29 1990-09-25 Dresser Industries, Inc. Pressure relief valve
US20180224010A1 (en) * 2015-09-18 2018-08-09 Shimadzu Corporation Pressure control valve
US10378665B2 (en) * 2015-09-18 2019-08-13 Shimadzu Corporation Pressure control valve
WO2018054885A1 (en) * 2016-09-21 2018-03-29 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Minimum pressure valve for a screw compressor for a vehicle, in particular a utility vehicle
CN109952458A (en) * 2016-09-21 2019-06-28 克诺尔商用车制动系统有限公司 The minimum pressure valve of screw compressor for vehicle, especially commercial vehicle

Similar Documents

Publication Publication Date Title
US2733729A (en) Pressure-responsive
US1770912A (en) Relief valve
US2944564A (en) Pressure relief valve with remote calibration change
US3512549A (en) Pilot operated relief valve
US3429321A (en) Safety valve actuator
US3032054A (en) Pressure regulator construction
US4091832A (en) Valve
US1843953A (en) Reduction valve
US3726301A (en) Pilot valve
US2902046A (en) Balanced pilot valve
US3599658A (en) Pressure regulator with internal relief valve
US934083A (en) Quick-acting safety-valve.
JP2010531965A (en) Shut-off valve built into the pressure release mechanism
US547506A (en) Pressure-regulating valve
US748091A (en) Pressure-regulating valve.
US2680453A (en) Safety relief valve
US534514A (en) Safety-valve
US788352A (en) Fluid-pressure regulator.
US2230718A (en) Valve
US2990852A (en) Pneumatic pressure switch
US1960271A (en) Temperature and pressure relief valve
US3043332A (en) Gas control unit
US4036250A (en) Blow-down safety valve
US935709A (en) Safety-valve.
US836306A (en) Reducing-valve.