GB1558425A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Sealing ring assemblies
Assignee: BESTOBELL SEALS Ltd
•
Filing: 1978-01-13
•
Granted: —
•
Expires: 1998-01-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 04:11
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/166
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
160 words
A sealing ring assembly for forming a seal between two relatively reciprocable members, one of which has a cylindrical surface, the assembly comprising a sealing ring, an anti-extrusion ring and a bearing ring arranged side by side co-axially, but not bonded to each other, the sealing ring being made of synthetic rubber, the antiextrusion ring of thermoplastic plastics material which is harder than the sealing ring and the bearing ring of thermoplastic plastics material which is harder than the anti-extrusion ring, wherein the bearing ring is provided around a circumferentially extending surface, which is in contact with a surface of the anti-extrusion ring, with a series of angularly spaced projections or depressions which, when the assembly is subjected to pressure in an axial direction, mate with the contacting surface of the anti-extrusion ring to key the bearing ring and the anti-extrusion ring together in such a way that relative movement between these two rings in a circumferential direction is prevented.
Claim 2
Dependent Claim
160 words
A sealing ring assembly for forming a seal between two relatively reciprocable members, one of which has a cylindrical surface, the assembly comprising a sealing ring, an anti-extrusion ring and a bearing ring arranged side by side co-axially, but not bonded to each other, the sealing ring being made of synthetic rubber, the antiextrusion ring of thermoplastic plastics material which is harder than the sealing ring and the bearing ring of thermoplastic plastics material which is harder than the anti-extrusion ring, wherein the bearing ring is provided around a circumferentially extending surface, which is in contact with a surface of the anti-extrusion ring, with a series of angularly spaced projections or depressions which, when the assembly is subjected to pressure in an axial direction, mate with the contacting surface of the anti-extrusion ring to key the bearing ring and the anti-extrusion ring together in such a way that relative movement between these two rings in a circumferential direction is prevented.
Claim 3
Dependent Claim
55 words
A sealing ring assembly according to claim 1, which is double-acting and in which there are two anti-extrusion rings, one on each side of the sealing ring, and two bearing rings, one adjacent each of the anti-extrusion rings and both the bearing rings being provided with a series of the angularly spaced projections or depressions.
Claim 4
Dependent Claim
38 words
A sealing ring assembly according to claim 1 or claim 2, in which the or each anti-extrusion ring is provided with depressions or projections which receive, or fit in, respectively the projections or depressions of the bearing ring.
Claim 5
Dependent Claim
54 words
A sealing ring assembly according to claim 1 or claim 2, in which the or each anti-extrusion ring is made of deformable and resilient thermoplastic plastics material, which nows under pressure to allow projections on the bearing ring to penetrate into it or to cause it to flow into depressions in the bearing ring.
Claim 6
Dependent Claim
38 words
A sealing ring assembly according to any one of the preceding claims, in which the or each anti-extrusion ring has a concave face on one side and the adjacent part of the sealing ring fits into the concavity.
Claim 7
Dependent Claim
34 words
A sealing ring assembly according to claim 5, in which the other side of the or each anti-extrusion ring has a part-conical face which engages with a corresponding face on the adjacent bearing ring.
Claim 8
Dependent Claim
23 words
A sealing ring assembly according to claim 6, in which the angle of conicity of the part-conical faces is from 15û to 166".
Claim 9
Dependent Claim
48 words
s. A sealing ring assembly according to any one of the preceding claims, in which the or each bearing ring is of L-shaped radial section with one arm of the L extending axially away from the sealing ring and the other arm of the L extending radially inwards.
Claim 10
Dependent Claim
58 words
A sealing ring assembly according to any one of the preceding claims, in which the or each anti-extrusion ring has a circumferentially extending and axially projecting portion which extends within the adjacent bearing ring and has a radially outwardly directed circumferentially extending surface in contact with a radially inwardly directed circumferentially extending surface of the adjacent bearing ring.
Claim 11
Dependent Claim
30 words
A sealing ring assembly according to claim 9, in which the projections or depressions are provided on the radially inwardly directed circumferentially extending surface of the or each bearing ring.
Claim 12
Dependent Claim
26 words
A sealing ring assembly according to claim 10, in which there are depressions in the radially inwardly directed surface, the depressions being of rounded circumferential profile.
Claim 13
Dependent Claim
56 words
A sealing ring assembly according to claim 6, claim 7 or any one of claims 8 to
11 when dependent upon claim 6 or claim 7, in which the or each bearing ring is provided with projections and these projections are in the form of ribs projecting axially from the part-conical face of the bearing ring.
Claim 14
Dependent Claim
68 words
A sealing ring assembly according to claim 12, in which the ribs are of triangular shape as seen in section radial to the ring assembly, with the angle of the apex of the triangle at the external periphery of the bearing ring such that the edges of the ribs which are directed towards the antiextrusion ring lie in a plane substantially normal to the axis of the assembly.
Claim 15
Dependent Claim
33 words
A sealing ring assembly according to claim 4 or any one of claims 5 to 13 when dependent upon claim 4, in which the or each anti-extrusion ring is of a thermoplastic rubber.
Claim 16
Dependent Claim
21 words
A sealing ring assembly according to any one of the preceding claims, in which the sealing ring is of nitrile rubber.
Claim 17
Dependent Claim
23 words
A sealing ring assembly according to any one of the preceding claims, in which the or each bearing ring is of polyacetal resin.
Claim 18
Dependent Claim
22 words
A sealing ring assembly according to claim 1, substantially as described with reference to Figures 1 and 2 of the accompanymg drawings.
Claim 19
Dependent Claim
22 words
A sealing ring assembly according to claim 1, subsantially as described with reference to Figures 3 and 4 of the accompanying drawings.
Claim 20
Dependent Claim
22 words
A sealing ring assembly according to claim 17, but modified substantially as described with reference to Figure 5 of the accompanying drawings.
Claim 21
Dependent Claim
22 words
A sealing ring assembly according to claim 18, but modified substantially as described with reference to Figure 6 of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.