US4383074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bushings
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1982-06-16
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Granted: 1983-05-10
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Expires: 2002-06-16
Abstract
Abstract A resilient bushing suitable for automobiles and other vehicles is disclosed wherein the rubber compound of said bushing contains carbon blacks of different particle sizes, surface areas and structures.
Inventors
- 👤 Tiong H. Kuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:28
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/3605; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/1386
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
A resilient bushing exhibiting improved fatigue life and having an annular molded vulcanized rubber compound insert in compressed relation between a substantially rigid cylindrical inner member and a substantially rigid cylindrical outer member wherein said rubber compound contains (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from abut 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g and where the rubber of said compound is selected from the group consisting of natural rubber and polyisoprene rubber and mixtures thereof.
Claim 2
Dependent Claim
155 words
A resilient bushing exhibiting improved fatigue life and having an annular molded vulcanized rubber compound insert in compressed relation between a substantially rigid cylindrical inner member and a substantially rigid cylindrical outer member wherein said rubber compound contains (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from abut 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g and where the rubber of said compound is selected from the group consisting of natural rubber and polyisoprene rubber and mixtures thereof.
Claim 3
Dependent Claim
26 words
A bushing according to claim 1 where said inner and outer cylindrical members are of steel and where the rubber of said compound is natural rubber.
Claim 4
Dependent Claim
101 words
A vulcanizable unvulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from about 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g.
Claim 5
Dependent Claim
101 words
A vulcanizable unvulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from about 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g.
Claim 6
Dependent Claim
30 words
A vulcanizable unvulcanized rubber compound according to claim 3 where the rubber of said compound is selected from the group consisting of natural rubber and polyisoprene rubber and mixtures thereof.
Claim 7
Dependent Claim
15 words
A vulcanizable unvulcanized rubber compound according to claim 4 where the rubber is natural rubber.
Claim 8
Dependent Claim
100 words
A vulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from about 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g.
Claim 9
Dependent Claim
100 words
A vulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 mμ, a surface area of from about 60 to 140 m 2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 mμ, a surface area of from about 20 to 50 m 2 /g and a DBPA of from about 50 to 80 cc/100 g.
Claim 10
Dependent Claim
29 words
A vulcanized rubber compound according to claim 6 where the rubber of said compound is selected from the group consisting of natural rubber and polyisoprene rubber and mixtures thereof.
Claim 11
Dependent Claim
14 words
A vulcanized rubber compound according to claim 7 where the rubber is natural rubber.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |