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GB2018389A - A fail-safe spring mechanism for an actuator - Google Patents

A fail-safe spring mechanism for an actuator

Info

Publication number
GB2018389A
GB2018389A GB7908056A GB7908056A GB2018389A GB 2018389 A GB2018389 A GB 2018389A GB 7908056 A GB7908056 A GB 7908056A GB 7908056 A GB7908056 A GB 7908056A GB 2018389 A GB2018389 A GB 2018389A
Authority
GB
United Kingdom
Prior art keywords
fail
actuator
safe
spring
spring mechanism
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.)
Granted
Application number
GB7908056A
Other versions
GB2018389B (en
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.)
Rotork PLC
Original Assignee
Rotork PLC
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 Rotork PLC filed Critical Rotork PLC
Priority to GB7908056A priority Critical patent/GB2018389B/en
Publication of GB2018389A publication Critical patent/GB2018389A/en
Application granted granted Critical
Publication of GB2018389B publication Critical patent/GB2018389B/en
Expired legal-status Critical Current

Links

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
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G1/00—Spring motors
    • F03G1/02—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil
    • F03G1/022—Spring motors characterised by shape or material of spring, e.g. helical, spiral, coil using spiral springs
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
    • F16K31/563—Mechanical actuating means without stable intermediate position, e.g. with snap action for rotating or pivoting valves

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

An actuator has a fail-safe mechanism operable by a spring 33. The spring is normally held inoperable by electrical means (30) so that the fail-safe mechanism is independent of the normal operation of the actuator (viz opening and closing of a valve connected to output shaft 13). The fail-safe mechanism is rendered operative by failure of the electrical supply, the output shaft 13 being moved to a predetermined fail-safe position by the stored energy of the spring force. <IMAGE>
GB7908056A 1978-04-07 1979-03-07 Fail-safe spring mechanism attachment for an actuator Expired GB2018389B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7908056A GB2018389B (en) 1978-04-07 1979-03-07 Fail-safe spring mechanism attachment for an actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1375878 1978-04-07
GB7908056A GB2018389B (en) 1978-04-07 1979-03-07 Fail-safe spring mechanism attachment for an actuator

Publications (2)

Publication Number Publication Date
GB2018389A true GB2018389A (en) 1979-10-17
GB2018389B GB2018389B (en) 1982-07-28

Family

ID=26249983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7908056A Expired GB2018389B (en) 1978-04-07 1979-03-07 Fail-safe spring mechanism attachment for an actuator

Country Status (1)

Country Link
GB (1) GB2018389B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313290A1 (en) * 1987-10-21 1989-04-26 Satchwell Control Systems Limited electro-mechanical actuators
FR2790533A1 (en) * 1999-03-02 2000-09-08 Michel Lesaint Mechanism for rotating tap dome of ninety degrees uses energy stored in spring when stretch manually beforehand
GB2370341A (en) * 2000-12-16 2002-06-26 Eco Electronics Ltd Automatic control valve
EP1264131A4 (en) * 2000-02-29 2005-09-21 Young-Gyu Choi Valve assembly with electronic timer to control open/shut functions
WO2010005358A1 (en) * 2008-07-11 2010-01-14 Aktiebolaget Skf A safety device for a linear actuator, and a linear actuator
GB2511799A (en) * 2013-03-13 2014-09-17 Kohler Mira Ltd Valve
US9182047B2 (en) 2013-03-13 2015-11-10 Kohler Mira Limited Valve with fail-safe device
WO2018224364A1 (en) * 2017-06-05 2018-12-13 Siemens Schweiz Ag Actuating drive, having a restoring spring which acts on an actuation connection independently of the actuation operation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313290A1 (en) * 1987-10-21 1989-04-26 Satchwell Control Systems Limited electro-mechanical actuators
FR2790533A1 (en) * 1999-03-02 2000-09-08 Michel Lesaint Mechanism for rotating tap dome of ninety degrees uses energy stored in spring when stretch manually beforehand
EP1264131A4 (en) * 2000-02-29 2005-09-21 Young-Gyu Choi Valve assembly with electronic timer to control open/shut functions
GB2370341A (en) * 2000-12-16 2002-06-26 Eco Electronics Ltd Automatic control valve
WO2010005358A1 (en) * 2008-07-11 2010-01-14 Aktiebolaget Skf A safety device for a linear actuator, and a linear actuator
US8621949B2 (en) 2008-07-11 2014-01-07 Aktiebolaget Skf Safety device for a linear actuator and a linear actuator
GB2511799A (en) * 2013-03-13 2014-09-17 Kohler Mira Ltd Valve
US9182047B2 (en) 2013-03-13 2015-11-10 Kohler Mira Limited Valve with fail-safe device
US9644757B2 (en) 2013-03-13 2017-05-09 Kohler Mira Limited Valve with fail-safe device
US10443751B2 (en) 2013-03-13 2019-10-15 Kohler Mira Limited Valve with fail-safe device
WO2018224364A1 (en) * 2017-06-05 2018-12-13 Siemens Schweiz Ag Actuating drive, having a restoring spring which acts on an actuation connection independently of the actuation operation

Also Published As

Publication number Publication date
GB2018389B (en) 1982-07-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee