IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0131559
(1993-10-04)
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발명자
/ 주소 |
- Preslicka A. J. (Knoxville TN) Paterick Robert J. (Knoxville TN) Smeltzer Paul (Naperville IL)
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출원인 / 주소 |
- Maremont Corporation (Naperville IL 02)
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인용정보 |
피인용 횟수 :
10 인용 특허 :
0 |
초록
▼
A vehicular exhaust system muffler including a mechanical lock joint for joining the end tubes to the flow tubes. One end of each end tube has an outer diameter selected such that the one end may be loosely, telescopically and overlappingly fitted within the adjacent end of the adjacent flow tube. T
A vehicular exhaust system muffler including a mechanical lock joint for joining the end tubes to the flow tubes. One end of each end tube has an outer diameter selected such that the one end may be loosely, telescopically and overlappingly fitted within the adjacent end of the adjacent flow tube. The overlapped ends of the end tubes and the flow tubes are mechanically locked together by a circumferential skewed bead formed in the overlapped ends, where the plane of the skewed bead is at an angle less than ninety degrees with respect to the central longitudinal axis of the overlapped ends. This mechanical locking maintains the relative axial positions of the overlapped ends and resists relative movement between the overlapped ends and between the internal panels and the wrapper due to the application of torsional and axial forces that the tubes experience during the assembly of the muffler. The muffler also employs a mechanical lock joint to lock the end tubes within apertures in the end panels of the muffler. The lock joint includes a continuous, circumferential bead formed in the end tube and an annular flange, integral with the end panel, which extends along the end tube and abuts the bead. A series spaced apart, circumferential, aligned elongated deformations are formed in the overlapped portion of the end tube and the flange.
대표청구항
▼
An improved muffler for a vehicular exhaust system used with an internal combustion engine comprising: A. reversing unit sub-assembly having first and second ends comprising: a first panel having first and second, oppositely facing side surfaces, a peripheral edge, an aperture, an aperture flange th
An improved muffler for a vehicular exhaust system used with an internal combustion engine comprising: A. reversing unit sub-assembly having first and second ends comprising: a first panel having first and second, oppositely facing side surfaces, a peripheral edge, an aperture, an aperture flange that surrounds the first panel aperture and that projects perpendicularly from the plane of the first panel, and a peripheral flange that is disposed adjacent to the peripheral edge of the first panel and that projects perpendicularly from one of the side surfaces of the first panel, with the first panel being disposed adjacent to the first end of the reversing unit sub-assembly so that the first surface of the first panel faces the first end of the reversing unit sub-assembly and so that the second surface of the first panel faces the second end of the reversing unit sub-assembly; a first flow tube having first and second ends, with the first end of the first flow tube extending into and through the first panel aperture so that the leading end of the first end of the first flow tube is adjacent to the first surface of the first panel and so that the second end of the first flow tube is adjacent to the second surface of the first panel, and with the first end of the first flow tube having a pre-selected inner diameter; and first means for mechanically locking the first end of the first flow tube in the first panel aperture; B. an inner sheet metal wrapper having an inner surface, an outer surface, a first side edge, a second side edge, and first and second end edges that are joined together, with the inner wrapper being configured so that the reversing unit sub-assembly is disposed within the inner wrapper, so that the inner wrapper extends around the peripheral edge of the first panel, so that the inner surface of the inner wrapper is in contact with but is metallurgically unbonded to the peripheral flange of the first panel, and so that the first panel is adjacent to the first side edge of the inner wrapper; C. an outer sheet metal wrapper having an inner surface, an outer surface, a first side edge, a second side edge and first and second end edges that are joined together, with the outer wrapper extending around the inner wrapper so that its inner surface is adjacent to the outer surface of the inner wrapper, so that its first and second side edges are adjacent to the first and second side edges, respectively, of the inner wrapper and so that the outer surface of the outer wrapper serves as the outer surface of the muffler; D. a first end cap sub-assembly that is assembled onto the first end of the assembled reversing unit sub-assembly, inner wrapper and outer wrapper, with the first cap sub-assembly including: a first end panel having a first side surface, a second side surface, a peripheral edge that is adjacent to the first side edges of the inner and outer wrappers, an aperture in the first end panel, an aperture flange that surrounds the first end panel aperture and that projects perpendicularly from the plane of the first side surface of the first end panel; a first end tube that has first and second ends and that is disposed, between its ends, within the first end panel aperture, with the outer diameter of the first end of the first end tube being preselected, with respect to the inner diameter of the first end of the first flow tube, so that the first end of the first end tube fits loosely, telescopically and overlappingly within the first end of the first flow tube during assembly of the first end of the first end tube within the first end of the first flow tube so as to minimize any possibility that forces applied in assembling the first end cap sub-assembly onto the first end of the reversing unit sub-assembly and in handling and using the muffler will cause axial displacement of the first panel relative to the inner wrapper; E. second means for mechanically locking the first end tube within the first end panel aperture; F. third means for mechanically locking together the overlapped first ends of the first end tube and the first flow tube; and G. fourth means for joining the first side edge of the outer wrapper and the peripheral edge of the first end panel.
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