GB2166501A - Sealing member - Google Patents

Sealing member Download PDF

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Publication number
GB2166501A
GB2166501A GB08427703A GB8427703A GB2166501A GB 2166501 A GB2166501 A GB 2166501A GB 08427703 A GB08427703 A GB 08427703A GB 8427703 A GB8427703 A GB 8427703A GB 2166501 A GB2166501 A GB 2166501A
Authority
GB
United Kingdom
Prior art keywords
sealing member
lip
ring
part circular
sealing
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
GB08427703A
Other versions
GB8427703D0 (en
GB2166501B (en
Inventor
Kenneth White Pearson
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.)
Sterling Hydraulics Ltd
Original Assignee
Sterling Hydraulics Ltd
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 Sterling Hydraulics Ltd filed Critical Sterling Hydraulics Ltd
Priority to GB08427703A priority Critical patent/GB2166501B/en
Publication of GB8427703D0 publication Critical patent/GB8427703D0/en
Publication of GB2166501A publication Critical patent/GB2166501A/en
Application granted granted Critical
Publication of GB2166501B publication Critical patent/GB2166501B/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/28—Couplings of the quick-acting type with fluid cut-off means
    • F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
    • F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied
    • F16L37/34—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied at least one of the lift valves being of the sleeve type, i.e. a sleeve is telescoped over an inner cylindrical wall
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • F16J15/024—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity
    • F16J15/025—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity and with at least one flexible lip
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/22—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts
    • F16L37/23—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts by means of balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

An annular Sealing Member comprising a portion (21) which is part circular in cross section with a lip (22) extending therefrom. The lip seats in a groove of one of two members to be sealed and prevents the sealing ring from being blown out by fluid pressure. <IMAGE>

Description

SPECIFICATION Sealing member This invention relates to a sealing member.
According to the present invention a sealing member comprises a portion which is part circular in cross section with a lip extending therefrom. Preferably the member is generally annular.
Preferably the lip extends laterally from the part circular portion, and the lip is shaped on its inner side with a concave portion adjoining the part circular portion and a convex portion adjoining the concave portion.
Conveniently the outerside of the lip extends rearwardly and substantially tangentially. The part circular portion may extend over approximately 280 with the lip extending from the remaining 90 .
The invention may be performed in various ways and one specific embodiment will now be described in more detail with reference to the accompanying drawings in which: Figure 1 is a view of a conventional 0 ring assembly.
Figure 2 is a cross section through a sealing member according to the present invention.
Figure 3 is a view of a part of a sealing member according to the present invention in a groove and Figure 4 is a conventional self sealing valve assembly and with which a sealing member according to the present invention can be used.
In the valve assembly according to Fig. 4 there is shown a self sealing coupling, the operation of which is conventional and will not be described in detail, but only those parts relevant to an understanding of the present invention will be referred to.
The self sealing coupling comprises a left hand member 10 and a right hand member 11. On joining the two members the end face 12 of the left hand member 10 is abutted against a dirt excluder ring 14 of the right hand member. On pushing the two members together the dirt excluder ring assembly 14 on right hand member 11 is pushed rearwardly whilst a mushroom valve assembly 15 then pushes a piston 12A to the left past an O ring seal 18 until dirt excluder ring 14 abuts against abutment 16 which then causes sleeve 5 to move rearwardly opening an annular flow path with the head of mushroom valve 15 to a point where flow can take place between the two members of the coupling. In the left hand member 10 as mentioned there is an O ring seal with a conventional Teflon backing member 20.
When the members are uncoupled and whilst fluid is flowing there is a tendency for the flow of fluid to cause the 0 ring 18 to blow out of position.
If reference is now made to Fig. 1 which is an enlarged view of the 0 ring 18 it can be seen that as the piston 21A closes a drop of pressure occurs in the zone marked A. whilst pressure remains hihg in the zone marked B.
This has the effect of creating a pressure behind the 0 ring and it is believed that it is this pressure differential which causes the 0 ring to blow out.
If reference is now made to Figs. 2 and 3 it will be seen that there is shown a sealing member of a different shape. This member is in the form of an 0 ring indicated generally at 21 with a laterally extending lip 22. The lip is shaped on its inner face to have a radiussed concave portion 23 which then extends into a convex portion 24 and then a generally radially directed portion 25.
If reference is now made to Fig. 3 it will be seen that when this sealing member 21 is placed in position and the piston 12A is being closed, whilst there is still a depression in the zone marked A the zone this time referred to as C above the lip and which has higher pressure exerted on it will in this case tend to force the lip into engagement with the groove in which it sits. In Fig. 3 will be seen a number of arrows showing the direction of the applied pressure. In practice the lip is made such as to be an interference fit in the groove, and assumes the shape shown in Fig.
3.
Thus with the present invention it is possible to avoid the difficult6y of the sealing member being inadvertentely blown out.
Although the member has been described as annular it will be appreciated that in particular circumstances members of other shapes i.e. straight or whatever shape may be required can be provided, a lip being provided and which may also be of the desired shape.
1. A Sealing Member comprising a portion which is part circular in cross section with a lip extending therefrom.
2. A sealing member as claimed in claim 1 which is generally annular.
3. A sealing member as claimed in claim 2 in which the lip extends laterally from the part circular portion.
4. A sealing member as claimed in claim 3 in which the lip is shaped on its inner side with a concave portion adjoining the part circular portion and a convex portion adjoining the concave portion.
5. A sealing member as claimed in claim 4 in which the outer side of the lip extends rearwardly and generally tangentially.
6. A sealing member as claimed in any one of claims 1 to 5 in which the part annular portion extends over approximately 270 with the lip extending from the remaining 90 .
7. A sealing member substantially as described herein with reference to and as shown in Figs. 2 to 4 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Sealing member This invention relates to a sealing member. According to the present invention a sealing member comprises a portion which is part circular in cross section with a lip extending therefrom. Preferably the member is generally annular. Preferably the lip extends laterally from the part circular portion, and the lip is shaped on its inner side with a concave portion adjoining the part circular portion and a convex portion adjoining the concave portion. Conveniently the outerside of the lip extends rearwardly and substantially tangentially. The part circular portion may extend over approximately 280 with the lip extending from the remaining 90 . The invention may be performed in various ways and one specific embodiment will now be described in more detail with reference to the accompanying drawings in which: Figure 1 is a view of a conventional 0 ring assembly. Figure 2 is a cross section through a sealing member according to the present invention. Figure 3 is a view of a part of a sealing member according to the present invention in a groove and Figure 4 is a conventional self sealing valve assembly and with which a sealing member according to the present invention can be used. In the valve assembly according to Fig. 4 there is shown a self sealing coupling, the operation of which is conventional and will not be described in detail, but only those parts relevant to an understanding of the present invention will be referred to. The self sealing coupling comprises a left hand member 10 and a right hand member 11. On joining the two members the end face 12 of the left hand member 10 is abutted against a dirt excluder ring 14 of the right hand member. On pushing the two members together the dirt excluder ring assembly 14 on right hand member 11 is pushed rearwardly whilst a mushroom valve assembly 15 then pushes a piston 12A to the left past an O ring seal 18 until dirt excluder ring 14 abuts against abutment 16 which then causes sleeve 5 to move rearwardly opening an annular flow path with the head of mushroom valve 15 to a point where flow can take place between the two members of the coupling. In the left hand member 10 as mentioned there is an O ring seal with a conventional Teflon backing member 20. When the members are uncoupled and whilst fluid is flowing there is a tendency for the flow of fluid to cause the 0 ring 18 to blow out of position. If reference is now made to Fig. 1 which is an enlarged view of the 0 ring 18 it can be seen that as the piston 21A closes a drop of pressure occurs in the zone marked A. whilst pressure remains hihg in the zone marked B. This has the effect of creating a pressure behind the 0 ring and it is believed that it is this pressure differential which causes the 0 ring to blow out. If reference is now made to Figs. 2 and 3 it will be seen that there is shown a sealing member of a different shape. This member is in the form of an 0 ring indicated generally at 21 with a laterally extending lip 22. The lip is shaped on its inner face to have a radiussed concave portion 23 which then extends into a convex portion 24 and then a generally radially directed portion 25. If reference is now made to Fig. 3 it will be seen that when this sealing member 21 is placed in position and the piston 12A is being closed, whilst there is still a depression in the zone marked A the zone this time referred to as C above the lip and which has higher pressure exerted on it will in this case tend to force the lip into engagement with the groove in which it sits. In Fig. 3 will be seen a number of arrows showing the direction of the applied pressure. In practice the lip is made such as to be an interference fit in the groove, and assumes the shape shown in Fig. 3. Thus with the present invention it is possible to avoid the difficult6y of the sealing member being inadvertentely blown out. Although the member has been described as annular it will be appreciated that in particular circumstances members of other shapes i.e. straight or whatever shape may be required can be provided, a lip being provided and which may also be of the desired shape. CLAIMS
1. A Sealing Member comprising a portion which is part circular in cross section with a lip extending therefrom.
2. A sealing member as claimed in claim 1 which is generally annular.
3. A sealing member as claimed in claim 2 in which the lip extends laterally from the part circular portion.
4. A sealing member as claimed in claim 3 in which the lip is shaped on its inner side with a concave portion adjoining the part circular portion and a convex portion adjoining the concave portion.
5. A sealing member as claimed in claim 4 in which the outer side of the lip extends rearwardly and generally tangentially.
6. A sealing member as claimed in any one of claims 1 to 5 in which the part annular portion extends over approximately 270 with the lip extending from the remaining 90 .
7. A sealing member substantially as described herein with reference to and as shown in Figs. 2 to 4 of the accompanying drawings.
8. A coupling including a sealing member as claimed in any one of the preceding claims.
GB08427703A 1984-11-01 1984-11-01 Sealing member Expired GB2166501B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08427703A GB2166501B (en) 1984-11-01 1984-11-01 Sealing member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08427703A GB2166501B (en) 1984-11-01 1984-11-01 Sealing member

Publications (3)

Publication Number Publication Date
GB8427703D0 GB8427703D0 (en) 1984-12-05
GB2166501A true GB2166501A (en) 1986-05-08
GB2166501B GB2166501B (en) 1988-06-15

Family

ID=10569117

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08427703A Expired GB2166501B (en) 1984-11-01 1984-11-01 Sealing member

Country Status (1)

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GB (1) GB2166501B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404495A2 (en) * 1989-06-20 1990-12-27 Swagelok Quick-Connect Co. Quick-connect/disconnect coupling
ITMI20130524A1 (en) * 2013-04-05 2014-10-06 Alfa Gomma S P A QUICK COUPLING FOR FLUID IN PRESSURE
WO2016193491A1 (en) * 2015-06-05 2016-12-08 Jochen Widenmann Seal

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB815973A (en) * 1955-04-26 1959-07-08 Renault Improvements relating to a sealing device between a sliding rod or piston and a cylinder
GB1000644A (en) * 1963-04-04 1965-08-11 Seetru Ltd Improvements in and relating to resilient sealing means for fluid valves
GB1015412A (en) * 1962-03-24 1965-12-31 Seetru Ltd Improvements in and relating to resilient sealing rings for fluid valves
GB1104984A (en) * 1965-01-30 1968-03-06 Deutsche Werft Ag Improvements in or relating to fluid-tight seals for rotatable shafts and the like
GB2040384A (en) * 1979-01-23 1980-08-28 Nissan Motor Clutch housing for a transmission
GB1573906A (en) * 1976-03-30 1980-08-28 Girling Ltd Brake pressure control valves
GB2071244A (en) * 1980-03-12 1981-09-16 Teves Gmbh Alfred Hydraulic brake system
GB2109061A (en) * 1981-09-03 1983-05-25 Elf Aquitaine Annular seal
GB2130345A (en) * 1982-09-09 1984-05-31 Cameron Iron Works Inc Ball valve
GB2157374A (en) * 1984-04-13 1985-10-23 Waeschle Maschf Gmbh Ring seal

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB815973A (en) * 1955-04-26 1959-07-08 Renault Improvements relating to a sealing device between a sliding rod or piston and a cylinder
GB1015412A (en) * 1962-03-24 1965-12-31 Seetru Ltd Improvements in and relating to resilient sealing rings for fluid valves
GB1000644A (en) * 1963-04-04 1965-08-11 Seetru Ltd Improvements in and relating to resilient sealing means for fluid valves
GB1104984A (en) * 1965-01-30 1968-03-06 Deutsche Werft Ag Improvements in or relating to fluid-tight seals for rotatable shafts and the like
GB1573906A (en) * 1976-03-30 1980-08-28 Girling Ltd Brake pressure control valves
GB2040384A (en) * 1979-01-23 1980-08-28 Nissan Motor Clutch housing for a transmission
GB2071244A (en) * 1980-03-12 1981-09-16 Teves Gmbh Alfred Hydraulic brake system
GB2109061A (en) * 1981-09-03 1983-05-25 Elf Aquitaine Annular seal
GB2130345A (en) * 1982-09-09 1984-05-31 Cameron Iron Works Inc Ball valve
GB2157374A (en) * 1984-04-13 1985-10-23 Waeschle Maschf Gmbh Ring seal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404495A2 (en) * 1989-06-20 1990-12-27 Swagelok Quick-Connect Co. Quick-connect/disconnect coupling
EP0404495A3 (en) * 1989-06-20 1991-04-24 Swagelok Quick-Connect Co. Quick-connect/disconnect coupling
ITMI20130524A1 (en) * 2013-04-05 2014-10-06 Alfa Gomma S P A QUICK COUPLING FOR FLUID IN PRESSURE
WO2014161906A1 (en) * 2013-04-05 2014-10-09 Alfa Gomma S.P.A. Quick-fit coupling for pressurised fluid
CN106461142A (en) * 2013-04-05 2017-02-22 阿法格玛公司 Quick-fit coupling for pressurised fluid
US9958101B2 (en) 2013-04-05 2018-05-01 Alfa Gomma S.P.A. Quick-fit coupling for pressurized fluid
CN106461142B (en) * 2013-04-05 2019-11-05 阿法格玛公司 Ready-package coupler for charging fluid
WO2016193491A1 (en) * 2015-06-05 2016-12-08 Jochen Widenmann Seal

Also Published As

Publication number Publication date
GB8427703D0 (en) 1984-12-05
GB2166501B (en) 1988-06-15

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Legal Events

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

Effective date: 19921101