GB2124337A - Valve cock - Google Patents

Valve cock Download PDF

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Publication number
GB2124337A
GB2124337A GB08221995A GB8221995A GB2124337A GB 2124337 A GB2124337 A GB 2124337A GB 08221995 A GB08221995 A GB 08221995A GB 8221995 A GB8221995 A GB 8221995A GB 2124337 A GB2124337 A GB 2124337A
Authority
GB
United Kingdom
Prior art keywords
valve
shaft
spindle
open
aperture
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
GB08221995A
Other versions
GB2124337B (en
Inventor
John Robert Parkin
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 GB08221995A priority Critical patent/GB2124337B/en
Publication of GB2124337A publication Critical patent/GB2124337A/en
Application granted granted Critical
Publication of GB2124337B publication Critical patent/GB2124337B/en
Expired 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
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/04—Means to prevent accidental or unauthorised actuation yieldingly resisting the actuation

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

A ratchet mechanism is applied to a valve spindle and a cover, locked in place, encloses the ratchet and its pawl. Thus the valve operates one way only, the pawl being capable of being freed from the ratchet by the keyholder only. <IMAGE>

Description

SPECIFICATION Valve allowing adjustment in one direction only Technical Field In order to distribute or utilise fluids, gases, steams, vapours and suspensions in fluids, gases, steams or vapours a means of flow control is necessary. This is achieved by the use of valves which can open or close apertures in pipes and vessels so as to permit or prevent passage of the fluids etc. as stated above.
Background Art Practically all valves effect the opening or closing of the aperture by means of the movement in one or more full circles or parts of a circle of a spindle or shaft which causes the aperture to be obstructed to a greater or lesser degree. The spindle or shaft causes the obstruction of the aperture by a variety of mechanical means. These means of obstruction are not part to the invention.
What is relevant to the invention is that movement in full or part circles of the valve spindle or shaft is required to activate the mechanical means and reversal of the movement of the spindle or shaft is required to open the aperture when it is closed or vice versa. Three representative differing mechanical means of aperture closure are illustrated as Figures 1, 2 and 3 on Drawing Reference A which all utilise the circular movement of a valve spindle or shaft. The purpose of the illustration is to show the common factor of the rotating spindle or shaft.The technical defect of a valve so operated by a rotating spindle or shaft is the fact that reversal of the open/shut state is easily achieved by reversal of the rotary direction of the spindle or shaft; for example by persons not authorised to carry out the procedure or persons with an incomplete understanding of what the procedure will cause to the purpose to which the fluids etc. as stated above are being put.
The traditional way of preventing these misuses is to lock the valve by a variety of mechanical means in the open or shut position. Situations are numerous however where an open valve requires to be capable of being closed and not reopened without authority, or a closed valve requires to be capable of being opened and not reclosed without authority. The traditional practice of locking a valve in a fixed position does not allow the above versatility, it is dependent on the presence of a keyholder or easy access to the key which selfnegates the locking procedure. This technical defect the invention overcomes.
The invention is the application of a ratchet mechanism to the valve spindle or shaft, which will permit operation of the spindle or shaft in one direction only from the existing open or shut state of the valve, together with a cover fully enclosing the ratchet and pawl; the cover being locked with a normal lock. Thus the cover and the ratchet mechanism will only be capable of being freed by the keyholder. A ratchet and pawl mechanism is a well known from antiquity mechanical principle, the novelty in the invention is its marrying with a locked cover to form a single inventive concept.
The invention claimed could be either an integral part of the valve when manufactured or added to an existing valve as a separate component. For avoidance of doubt the fundamental features of the invention are illustrated at Figure 4 on Drawing Reference A.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Valve allowing adjustment in one direction only Technical Field In order to distribute or utilise fluids, gases, steams, vapours and suspensions in fluids, gases, steams or vapours a means of flow control is necessary. This is achieved by the use of valves which can open or close apertures in pipes and vessels so as to permit or prevent passage of the fluids etc. as stated above.
    Background Art Practically all valves effect the opening or closing of the aperture by means of the movement in one or more full circles or parts of a circle of a spindle or shaft which causes the aperture to be obstructed to a greater or lesser degree. The spindle or shaft causes the obstruction of the aperture by a variety of mechanical means. These means of obstruction are not part to the invention.
    What is relevant to the invention is that movement in full or part circles of the valve spindle or shaft is required to activate the mechanical means and reversal of the movement of the spindle or shaft is required to open the aperture when it is closed or vice versa. Three representative differing mechanical means of aperture closure are illustrated as Figures 1, 2 and 3 on Drawing Reference A which all utilise the circular movement of a valve spindle or shaft. The purpose of the illustration is to show the common factor of the rotating spindle or shaft.The technical defect of a valve so operated by a rotating spindle or shaft is the fact that reversal of the open/shut state is easily achieved by reversal of the rotary direction of the spindle or shaft; for example by persons not authorised to carry out the procedure or persons with an incomplete understanding of what the procedure will cause to the purpose to which the fluids etc. as stated above are being put.
    The traditional way of preventing these misuses is to lock the valve by a variety of mechanical means in the open or shut position. Situations are numerous however where an open valve requires to be capable of being closed and not reopened without authority, or a closed valve requires to be capable of being opened and not reclosed without authority. The traditional practice of locking a valve in a fixed position does not allow the above versatility, it is dependent on the presence of a keyholder or easy access to the key which selfnegates the locking procedure. This technical defect the invention overcomes.
    The invention is the application of a ratchet mechanism to the valve spindle or shaft, which will permit operation of the spindle or shaft in one direction only from the existing open or shut state of the valve, together with a cover fully enclosing the ratchet and pawl; the cover being locked with a normal lock. Thus the cover and the ratchet mechanism will only be capable of being freed by the keyholder. A ratchet and pawl mechanism is a well known from antiquity mechanical principle, the novelty in the invention is its marrying with a locked cover to form a single inventive concept.
    The invention claimed could be either an integral part of the valve when manufactured or added to an existing valve as a separate component. For avoidance of doubt the fundamental features of the invention are illustrated at Figure 4 on Drawing Reference A.
GB08221995A 1982-07-30 1982-07-30 Valve cock Expired GB2124337B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08221995A GB2124337B (en) 1982-07-30 1982-07-30 Valve cock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08221995A GB2124337B (en) 1982-07-30 1982-07-30 Valve cock

Publications (2)

Publication Number Publication Date
GB2124337A true GB2124337A (en) 1984-02-15
GB2124337B GB2124337B (en) 1986-06-11

Family

ID=10532005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08221995A Expired GB2124337B (en) 1982-07-30 1982-07-30 Valve cock

Country Status (1)

Country Link
GB (1) GB2124337B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207219A (en) * 1987-07-23 1989-01-25 Fortress Interlocks Ltd Valve drive mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207219A (en) * 1987-07-23 1989-01-25 Fortress Interlocks Ltd Valve drive mechanism
GB2207219B (en) * 1987-07-23 1991-05-22 Fortress Interlocks Ltd Flow-control device and drive mechanism therefor

Also Published As

Publication number Publication date
GB2124337B (en) 1986-06-11

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Legal Events

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

Effective date: 19920730