WO1989003954A3 - A seal - Google Patents
A seal Download PDFInfo
- Publication number
- WO1989003954A3 WO1989003954A3 PCT/GB1988/000926 GB8800926W WO8903954A3 WO 1989003954 A3 WO1989003954 A3 WO 1989003954A3 GB 8800926 W GB8800926 W GB 8800926W WO 8903954 A3 WO8903954 A3 WO 8903954A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seals
- seal
- sealing
- piston
- arcuate heel
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/236—Piston sealing arrangements
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Actuator (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Sealing Devices (AREA)
Abstract
The seal (50) includes an axially forward portion (50a) defining radially inner and radially outer deflectable lip seals (50c, 50d) and an axially rearward portion (50b) defining radially outer and inner arcuate heel seals (50e, 50f). When positioned in an annular groove (43) in a piston (30) and with the piston slidably received in the bore (27) of a cylinder (28), the annular seal (50) provides fluid pressure sealing at the deflectable lip seals, provides secondary fluid pressure sealing at the arcuate heel seals, provides air sealing at the arcuate heel seals, and functions at the arcuate heel seals to preclude the entry of contaminants into the sealing interfaces. The seal is especially effective when employed in a hydraulic pressure cylinder of the centre feed type since it allows the usage of a single annular seal positioned in a singular annular groove in the piston.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9003287A GB2229790B (en) | 1987-10-29 | 1990-02-14 | A seal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11402987A | 1987-10-29 | 1987-10-29 | |
US114,029 | 1987-10-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1989003954A2 WO1989003954A2 (en) | 1989-05-05 |
WO1989003954A3 true WO1989003954A3 (en) | 1989-06-01 |
Family
ID=22352971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1988/000926 WO1989003954A2 (en) | 1987-10-29 | 1988-10-21 | A seal |
Country Status (2)
Country | Link |
---|---|
GB (2) | GB8813677D0 (en) |
WO (1) | WO1989003954A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2745617B1 (en) * | 1996-02-29 | 1999-01-08 | Valeo | ADVANCED HYDRAULIC CONTROLLED CLUTCH DEVICE ESPECIALLY FOR MOTOR VEHICLES |
DE19714844A1 (en) | 1997-04-10 | 1998-10-15 | Mannesmann Sachs Ag | Groove ring for sealing cylinder surfaces |
GB0301511D0 (en) * | 2003-01-23 | 2003-02-19 | Automotive Prod France | Seals |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700561A (en) * | 1949-01-07 | 1955-01-25 | Ernest J Svenson | Sealing means |
GB810625A (en) * | 1955-10-04 | 1959-03-18 | Parker Hannifin Corp | Sealing or packing ring and joint including such ring |
GB860090A (en) * | 1956-05-07 | 1961-02-01 | Renault | Improvements in and relating to sealing means |
GB1142265A (en) * | 1967-02-14 | 1969-02-05 | Trist Mouldings & Seals Ltd | Improvements relating to sealing rings |
GB2012392A (en) * | 1978-01-13 | 1979-07-25 | Dba Sa | Piston Rings; Lip Type Seals |
GB2102898A (en) * | 1981-07-29 | 1983-02-09 | Ludowici J C & Son Ltd | Lipped seals |
-
1988
- 1988-06-09 GB GB888813677A patent/GB8813677D0/en active Pending
- 1988-10-21 WO PCT/GB1988/000926 patent/WO1989003954A2/en unknown
-
1990
- 1990-02-14 GB GB9003287A patent/GB2229790B/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700561A (en) * | 1949-01-07 | 1955-01-25 | Ernest J Svenson | Sealing means |
GB810625A (en) * | 1955-10-04 | 1959-03-18 | Parker Hannifin Corp | Sealing or packing ring and joint including such ring |
GB860090A (en) * | 1956-05-07 | 1961-02-01 | Renault | Improvements in and relating to sealing means |
GB1142265A (en) * | 1967-02-14 | 1969-02-05 | Trist Mouldings & Seals Ltd | Improvements relating to sealing rings |
GB2012392A (en) * | 1978-01-13 | 1979-07-25 | Dba Sa | Piston Rings; Lip Type Seals |
GB2102898A (en) * | 1981-07-29 | 1983-02-09 | Ludowici J C & Son Ltd | Lipped seals |
Also Published As
Publication number | Publication date |
---|---|
GB2229790B (en) | 1991-03-13 |
WO1989003954A2 (en) | 1989-05-05 |
GB2229790A (en) | 1990-10-03 |
GB9003287D0 (en) | 1990-06-20 |
GB8813677D0 (en) | 1988-07-13 |
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