US4727957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber vibration isolator for muffler
Assignee: Bridgestone Corp
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Filing: 1986-12-23
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Granted: 1988-03-01
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Expires: 2006-12-23
Abstract
Abstract A rubber vibration isolator is used as a muffler hanger or muffler mount between a car body and a muffler to hang the latter from the former. The isolator includes a body made of rubber-like elastic material whose damping factor is high, two holes, upper and lower, formed in the center of the body of rubber-like elastic material, and a weight provided between the two holes and supported at opposite sides thereof by rubber-like elastic members. The rubber vibration isolator is advantageous in that coefficients of transfer of vibrations of both high and low frequencies, respectively, are lowered.
Inventors
- 👤 Akio Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:20
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/1822; F16; F16F; F16F7/00; F16F7/10; F16F7/104; F16F7/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A rubber vibration isolator adapted for use between a body of a car and a muffler, comprising: a unitary body made of rubber-like elastic material having a central area and a high damping factor for suspending the muffler from the car body and dampening low frequency vibrations; an upper hole and a lower hole formed in the center of the body of rubber-like elastic material; a dynamic damper comprising a metal weight having opposite sides and supported between said upper and lower holes for dampening high frequency vibrations; and rubber-like elastic members connecting said body of rubber-like elastic material and said opposite sides of said weight for supporting said weight between said upper and lower holes.
Claim 2
Dependent Claim
116 words
A rubber vibration isolator adapted for use between a body of a car and a muffler, comprising: a unitary body made of rubber-like elastic material having a central area and a high damping factor for suspending the muffler from the car body and dampening low frequency vibrations; an upper hole and a lower hole formed in the center of the body of rubber-like elastic material; a dynamic damper comprising a metal weight having opposite sides and supported between said upper and lower holes for dampening high frequency vibrations; and rubber-like elastic members connecting said body of rubber-like elastic material and said opposite sides of said weight for supporting said weight between said upper and lower holes.
Claim 3
Dependent Claim
23 words
A rubber vibration isolator as in claim 1, wherein said rubber-like elastic members are formed integrally with said body of rubber-like elastic material.
Claim 4
Dependent Claim
21 words
A rubber vibration isolator as in claim 1, wherein said metal weight is bonded to said rubber-like elastic members by vulcanization.
References Cited (Backward Citations)
US4274761A
Cited
US4660797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |