Exhaust header system
Abstract
Abstract THE EXHAUST HEADER SYSTEM IS FOR USE WITH AN INTERNAL COMBUSTION ENGINE, AS FOR INSTANCE WITH THE PORSCHE 911, WHEREIN THE CYLINDERS ARE DIVIDED INTO TWO EXHAUST BANKS. THE SYSTEM COMPRISES A MUFFLER WHICH IS CONNECTED TO EXHAUST CONDUITS FROM THE RESPECTIVE CYLINDER BANKS, WHICH CONDUITS ARE ADAPTED TO PROVIDE SUBSTANTIALLY THE SAME RESISTANCE TO THE FLOW OF EXHAUST GASES THERETHROUGH. NOTWITHSTANDING THE FACT THAT ONE SUCH CONDUIT IS LONGER THAN THE OTHER, THE RESISTANCE IS MAINTAINED SUBSTANTIALLY EQUAL BY VIRTUE OF THE ADDITION OF CERTAIN TURNS OR BENDS IN THE SHORTER ONE. THE MUFFLER IS UNIQUE IN HAVING COAXIALLY ARRANGED INNER AND OUTER TUBULAR MEMBERS AND NOISE ABSORBING MEANS INTERPOSED THEREBETWEEN. THE INNER TUBULAR MEMBER IS PERFORATED BUT THE SEVERAL TUBULAR MEMBERS ARE MAINTAINED STRAIGHT SO THAT THE FLOW OF EXHAUST GASES IS UNIMPEDED AND THE NOISE IS ABSORBED BY THE NOISE ABSORBING MEANS BETWEEN THE TUBULAR MEMBERS.
Inventors
- 👤 Wayne A Christensen
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |