US4779904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Couplings for connecting vehicle exhaust tail pipes to exhaust conduits for removing vehicle exhaust gases
Assignee: Individual
•
Filing: 1986-10-31
•
Granted: 1988-10-25
•
Expires: 2006-10-31
Abstract
Abstract A coupling for connecting a vehicle exhaust pipe to an exhaust conduit for removing vehicle exhaust gases has a cylindrical housing with an inlet at the front end and an outlet at the rear end, the rear end being connectible to an exhaust conduit. A bristle assembly is mounted within the housing adjacent the front end. The bristle assembly includes an annular container and a multitude of resilient bristles extending radially inwardly from the retainer towards the longitudinal axis of the housing and terminating at a position spaced from the longitudinal axis to provide a central aperture. The bristles project radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer to enable the front end of the housing to be pushed over a vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.
Inventors
- 👤 Christopher K. Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:08
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/002; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3288; F16L; F16L17/00; F16L17/02; F16L17/03; F16L17/032; F16L25/00; F16L25/14; Y; Y10; Y10S; Y10S285/00; Y10S285/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
186 words
A coupling for connecting a vehicle exhaust pipe to an exhaust conduit for removing vehicle exhaust gases, comprising: a cylindrical housing having an inlet at a front end and an outlet at a rear end, said rear end being connectible to an exhaust conduit, a bristle assembly removably mounted within the housing adjacent the front end, and removable means for securing the bristle assembly in the housing, said bristle assembly comprising an annular retainer and a multitude of resilient bristles extending radially inwardly from the retainer towards a longitudinal axis of the housing and terminating at a position spaced from said longitudinal axis to provide a central aperture, said bristles projecting radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer to enable the front end of the housing to be pushed over a vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.
Claim 2
Dependent Claim
186 words
A coupling for connecting a vehicle exhaust pipe to an exhaust conduit for removing vehicle exhaust gases, comprising: a cylindrical housing having an inlet at a front end and an outlet at a rear end, said rear end being connectible to an exhaust conduit, a bristle assembly removably mounted within the housing adjacent the front end, and removable means for securing the bristle assembly in the housing, said bristle assembly comprising an annular retainer and a multitude of resilient bristles extending radially inwardly from the retainer towards a longitudinal axis of the housing and terminating at a position spaced from said longitudinal axis to provide a central aperture, said bristles projecting radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer to enable the front end of the housing to be pushed over a vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.
Claim 3
Dependent Claim
23 words
A coupling according to claim 1 wherein the annular retainer has an outer diameter in the range from about 3.5 to about 4".
Claim 4
Dependent Claim
30 words
A coupling according to claim 2 wherein the bristles project radially inwardly from the retainer by a distance which is about 7:1 longer than the radial thickness of the retainer.
Claim 5
Dependent Claim
189 words
A coupling assembly comprising a coupling connecting a vehicle exhaust tail pipe to an exhaust conduit for removing vehicle exhaust fumes, said coupling comprising a cylindrical housing having an inlet at a front end and an outlet at a rear end, said rear end being connected to the exhaust conduit, a bristle assembly removably mounted within the housing adjacent the front end, and removable means securing the bristle assembly in the housing, said bristle assembly comprising an annular retainer and a multitude of resilient bristles extending radially inwardly from the retainer towards a longitudinal axis of the housing and terminating at a position spaced from said longitudinal axis to provide a central aperture, said bristles projecting radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer, the front end of the housing having been pushed over the vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.
Claim 6
Dependent Claim
189 words
A coupling assembly comprising a coupling connecting a vehicle exhaust tail pipe to an exhaust conduit for removing vehicle exhaust fumes, said coupling comprising a cylindrical housing having an inlet at a front end and an outlet at a rear end, said rear end being connected to the exhaust conduit, a bristle assembly removably mounted within the housing adjacent the front end, and removable means securing the bristle assembly in the housing, said bristle assembly comprising an annular retainer and a multitude of resilient bristles extending radially inwardly from the retainer towards a longitudinal axis of the housing and terminating at a position spaced from said longitudinal axis to provide a central aperture, said bristles projecting radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer, the front end of the housing having been pushed over the vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.
Claim 7
Dependent Claim
24 words
A coupling assembly according to claim 4 wherein the annular retainer has an outer diameter in the range from about 3.5 to about 4".
Claim 8
Dependent Claim
30 words
A coupling assembly according to claim 5 wherein the bristles project radially inwardly from the retainer by distance which is about 7:1 longer than the radial thickness of the retainer.
Claim 9
Dependent Claim
49 words
A coupling assembly according to claim 4 wherein at least some of the bristles have free end portions bent rearwardly by the vehicle exhaust tail pipe a sufficient amount to cause said free end portions to extend in a rearward direction parallel to the length of the tail pipe.
References Cited (Backward Citations)
US2620893A
Cited
US2878048A
Cited
US3069186A
Cited
US3288497A
Cited
US4209268A
Cited
US4318547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |