US5127489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension apparatus for engine exhaust system
Assignee: Mazda Motor Corp
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Filing: 1990-06-28
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Granted: 1992-07-07
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Expires: 2010-06-28
Abstract
Abstract An engine exhaust system is suspended from a power plant and a car body by a suspension apparatus so as to support an exhaust pipe, at a plurality of points, from a power plant system. A muffler is connected to the engine exhaust pipe and suspended, at a rear end of the muffler only, from the car body. The elastic suspension member includes an elastic block to be attached to the power plant or car body and a rigid bracket to hold the exhaust system.
Inventors
- 👤 Koji Takato
- 👤 Masayuki Kawata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/1822; B; B60; B60K; B60K13/00; B60K13/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
215 words
A suspension apparatus for suspending an engine exhaust system from a car body of a vehicle, comprising: a power plant system including an engine, a transmission, and a differential; a power plant supporting frame secured to said car body and supporting at least said transmission and said differential, said engine exhaust system extending in a longitudinal direction relative to said vehicle and having an exhaust pipe with one end directly connected to said engine and another end, remote from said engine, connected to a muffler; and elastic suspension means for insulating said engine exhaust system from engine vibration and suspending said exhaust pipe, from said power plant system, at a plurality of points, said elastic suspension means including a first suspension block suspending a rearmost end of said muffler from said car body, said first suspension block being the only connection between said muffler and said car body, said elastic suspension means further including a second suspension block between said differential and said exhaust pipe, said rearmost end being an end of said muffler remote from said engine, said first suspension block permitting said muffler to pivotally oscillate about said rearmost end, relative to said car body, around an axis oriented substantially at a right angle relative to said longitudinal direction under said engine vibration.
Claim 2
Dependent Claim
215 words
A suspension apparatus for suspending an engine exhaust system from a car body of a vehicle, comprising: a power plant system including an engine, a transmission, and a differential; a power plant supporting frame secured to said car body and supporting at least said transmission and said differential, said engine exhaust system extending in a longitudinal direction relative to said vehicle and having an exhaust pipe with one end directly connected to said engine and another end, remote from said engine, connected to a muffler; and elastic suspension means for insulating said engine exhaust system from engine vibration and suspending said exhaust pipe, from said power plant system, at a plurality of points, said elastic suspension means including a first suspension block suspending a rearmost end of said muffler from said car body, said first suspension block being the only connection between said muffler and said car body, said elastic suspension means further including a second suspension block between said differential and said exhaust pipe, said rearmost end being an end of said muffler remote from said engine, said first suspension block permitting said muffler to pivotally oscillate about said rearmost end, relative to said car body, around an axis oriented substantially at a right angle relative to said longitudinal direction under said engine vibration.
Claim 3
Dependent Claim
31 words
A suspension apparatus as defined in claim 1, wherein said exhaust pipe is suspended from at least two points on both sides of a catalytic converter disposed in said exhaust pipe.
Claim 4
Dependent Claim
36 words
A suspension apparatus as defined in claim 1, wherein said elastic suspension means further comprises at least one hanger bracket which is attached to at least said second suspension block and holds said engine exhaust system.
Claim 5
Dependent Claim
18 words
A suspension apparatus as defined in claim 3, wherein each elastic suspension block is made of a rubber.
Claim 6
Dependent Claim
72 words
A suspension apparatus as defined in claim 3, wherein each of said first and second suspension blocks has a hollow spacer inserted to its full length therein, each hollow spacer having a length not greater than a thickness of the suspension block in which it is inserted, and a bolt and nut for fastening said hanger bracket to each of said first and second suspension blocks through one of said hollow spacers.
Claim 7
Dependent Claim
29 words
A suspension apparatus as defined in claim 5, and further comprising a heat insulation member inserted between each of said elastic suspension blocks and one of the hanger brackets.
Claim 8
Dependent Claim
28 words
A suspension apparatus as defined in claim 6, and further comprising a washer inserted between each of said elastic suspension blocks and one of the heat insulation members.
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) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |