US4700954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radially extensible joint packing with fiber filled elastomeric core
Assignee: Gates Rubber Co
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Filing: 1982-10-25
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Granted: 1987-10-20
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Expires: 2002-10-25
Abstract
Abstract An annularly shaped elastomeric core type joint packing having a fiber reinforcement, having a radial reinforcing effect with respect to a longitudinal axis of the core.
Inventors
- 👤 Richard J. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/937; Y10S277/944
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
In a joint packing of the type with a generally annularly shaped elastomeric core that is radially extensible to effect sealing when externally clamped along a longitudinal axis of the core, the improvement in the core comprising: an embedded reinforcement of at least about 10 percent by volume of fiber having lengths from about 1 mm to about 12 mm and dispersed in the elastomeric core where some of the fiber is oriented lengthwise to have a reinforcing component along radial lines with respect to the longitudinal axis of the core.
Claim 2
Dependent Claim
91 words
In a joint packing of the type with a generally annularly shaped elastomeric core that is radially extensible to effect sealing when externally clamped along a longitudinal axis of the core, the improvement in the core comprising: an embedded reinforcement of at least about 10 percent by volume of fiber having lengths from about 1 mm to about 12 mm and dispersed in the elastomeric core where some of the fiber is oriented lengthwise to have a reinforcing component along radial lines with respect to the longitudinal axis of the core.
Claim 3
Dependent Claim
34 words
The joint packing as claimed in claim 1 wherein the core has a compression modulus of at least about 1700 psi at 25 percent compression at about 300° F. during a first compression cycle.
Claim 4
Dependent Claim
14 words
The joint packing as claimed in claim 1 wherein the fiber is fiber glass.
Claim 5
Dependent Claim
85 words
The joint packing as claimed in claim 1 wherein the core comprises a plurality of annularly shaped elastomeric discs having a longitudinal axis, the discs successively axially stacked atop one another along the longitudinal axis of the core wherein the discs have embedded fiber that is oriented substantially lengthwise in substantially the same direction across the discs and wherein stacked plies of discs are angularly rotated relative to each other about their axes so that fiber of the stacked plies are oriented in different directions.
Claim 6
Dependent Claim
15 words
The joint packing as claimed in claim 1 wherein the elastomeric core is of ethylene-propylene-diene-monomer.
Claim 7
Dependent Claim
19 words
The joint packing as claimed in claim 1 wherein the elastomeric core has a substantially cylindrical exterior surface portion.
Claim 8
Dependent Claim
19 words
The joint packing as claimed in claim 1 wherein the elastomeric core has a substantially frustoconical exterior surface portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |