Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1995-01-04
1999-05-25
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
138113, F01N 708
Patent
active
059071346
ABSTRACT:
Air gap-insulated exhaust pipe (2) with a sliding fit (16) between two inner pipe sections (12, 14) in a middle area of the length of the exhaust pipe (2). A radial mounting (26) of the inner pipe (6) in the outer pipe (4) is provided in the area of a bend (20) or beyond the bend (20), which joins the leg (18) of the exhaust pipe (2) in which the sliding fit (16) is located. In terms of manufacturing technique, the radial mounting (26) may be prepared before or after the bending of the double-pipe arrangement. The sliding fit (16) may be prepared, even in the case of a straight exhaust pipe, manifold, or the like, by using a spacer sleeve (40) and joint calibration of the pipe ends of the inner pipe sections (12, 14), and the spacer sleeve burns off at the time the exhaust pipe is put into operation for the first time. As an alternative, the sliding fit (16) may also be prepared by polygon calibration and rotating the pipe ends by half the pitch of the polygon.
REFERENCES:
patent: 3500954 (1970-03-01), Willette
patent: 4356885 (1982-11-01), Dello
patent: 4501302 (1985-02-01), Harwood
patent: 5170557 (1992-12-01), Rigsby
patent: 5186502 (1993-02-01), Martin
Nording Thomas
Utter Alfred
Dang Khanh
J. Eberspacher GmbH & Co.
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