GB1012451A - Improvements relating to piston sealing means - Google Patents
Improvements relating to piston sealing meansInfo
- Publication number
- GB1012451A GB1012451A GB2022362A GB2022362A GB1012451A GB 1012451 A GB1012451 A GB 1012451A GB 2022362 A GB2022362 A GB 2022362A GB 2022362 A GB2022362 A GB 2022362A GB 1012451 A GB1012451 A GB 1012451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- piston
- spring
- cylinder
- rod
- 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
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Sealing Material Composition (AREA)
Abstract
1,012,451. Piston and stuffing-box packings. J. L. GRATZMULLER. May 25, 1962 [May 26, 1961; May 8, 1962], No. 20223/62. Addition to 814,830. Headings F2B and F2T. [Also in Division F1] A seal assembly between two relatively displaceable inner and outer members 1, 2, Fig. 2, comprises at least two axially stacked rings 12, 13 of differing hardness which are continuously axially compressed in a space between facing cylindrical surfaces of the members against a radial surface of one of the members by means of a spring-loaded metal ring 7, the harder ring 12 being positioned between the ring 13 and the radial surface and being made of a material having self-lubricating properties which on sliding engagement with the surface of the other member deposits thereon a thin continuous film preventing or minimizing direct frictional contact between that surface and the ring 13. The members 1, 2 constitute the piston and cylinder of an oleo-pneumatic accumulator. The spring 8 is seated at one end against the ring 7 bearing and at the other end against a disc retained on the piston-rod by a spring clip. The ring 12 may be made from P.T.F.E. or polytrifluorochloroethylene and the ring 13 of an elastomer, e.g. neoprene, having a Shore hardness number of 60-80. When gas is introduced in the compartment 4 of the cylinder with the piston bearing against the cylinder end plate 26 on the oil-filled side, the ring 12 undergoes a slight degree of flow as at 12<SP>1</SP> and prevents any extrusion of the ring 13 between the piston and cylinder. In a modification, Fig. 3, the seal assembly comprises a ring 14 of non-binding metal, a ring 12 of P.T.F.E., two or more elastomer rings 15, 16 of different hardness, e.g. as a function of temperature, and a spring-seating ring 17 of non-binding metal. The spring 8 compresses the assembly through a sleeve 19 which has a tubular extension 20 abutting against the spring-retaining washer 9. In the uppermost position of the piston, when no gas is present above it, the washer 9 engages a shoulder 22 on the cylinder end 21 and transmits through the sleeve 19 to the seal assembly the entire oil pressure exerted on the piston. The retainer ring 10 for the washer 9 may be formed of piano wire and may be contained within a channel surrounding the piston rod and formed between facing bevelled portions at the inner peripheries of a pair of superimposed annular members secured together by crimping a flange of one on top of the other. In Fig. 5, the seal assembly forms part of a stuffing-box 28 secured to one end of a high-pressure cylinder 30 around a slidable rod 27. The ring 14 in that case also serves as a guide to the rod. A ring 31 of plastic material is provided to wipe off dirt from the rod.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR862938A FR1297881A (en) | 1961-05-26 | 1961-05-26 | Sealing packing |
FR896852A FR1333774A (en) | 1962-05-08 | 1962-05-08 | Sealing packing |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1012451A true GB1012451A (en) | 1965-12-08 |
Family
ID=26190720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2022362A Expired GB1012451A (en) | 1961-05-26 | 1962-05-25 | Improvements relating to piston sealing means |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE617603A (en) |
CH (1) | CH391404A (en) |
ES (1) | ES277625A1 (en) |
GB (1) | GB1012451A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6023684Y2 (en) * | 1979-04-28 | 1985-07-15 | 株式会社三豊製作所 | Dial gauge outer frame mounting device |
US4936197A (en) * | 1988-10-12 | 1990-06-26 | C. E. Conover & Co., Inc. | Dynamic seal construction |
-
1962
- 1962-05-14 BE BE617603A patent/BE617603A/en unknown
- 1962-05-24 ES ES277625A patent/ES277625A1/en not_active Expired
- 1962-05-25 GB GB2022362A patent/GB1012451A/en not_active Expired
- 1962-05-25 CH CH640862A patent/CH391404A/en unknown
Also Published As
Publication number | Publication date |
---|---|
ES277625A1 (en) | 1962-10-16 |
CH391404A (en) | 1965-04-30 |
BE617603A (en) | 1962-08-31 |
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