US3842940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer for internal combustion engines
Assignee: WYTWORNIA SILNIKOW WYSOKOPREZN
•
Filing: 1972-11-07
•
Granted: 1974-10-22
•
Expires: 1992-11-07
Abstract
Abstract A silencer for an internal combustion engine comprising at least one set of two bowed, perforated pipes enclosed in sound absorbing material within a housing: at least one connector is provided having arms extending in opposite directions, an inlet of each pipe being axially connected to an arm of the connector. Entrance to the connector is provided by one or more arms transverse to the oppositely extending arms. Preferably, a plurality of sets of pipes are connected by a plurality of such connectors, the discharge from one set providing the inlet to the succeeding set, with collision of exhaust gas streams occurring in the connectors.
Inventors
- 👤 L Bonikowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:52
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/10; F01N1/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
A silencer for an internal combustion engine comprising: a plurality of sets of pipes, each set comprising two bowed symmetrical pipes each having an inlet and an outlet and being perforated along their lengths, a connector for the pipe inlets of each set comprising a pair of oppositely extending arms to each of which an inlet of a said pipe is axially connected, and inlet arm means extending transversely of said oppositely extending arms, a connector for the pipe outlets of each set comprising a pair of oppositely extending arms to each of which an outlet of a said pipe is axially connected, and outlet arm means of said last mentioned connector extending transversely of said arms thereof, the outlets of the pipes of one set being connected to the inlets of the pipes of a succeeding set by a said connector having two pairs of coplanar oppositely extending arms transverse to each other, a housing for said pipes and connectors, and sound absorbing material occupying the space in said housing around said pipes and connectors.
Claim 2
Dependent Claim
176 words
A silencer for an internal combustion engine comprising: a plurality of sets of pipes, each set comprising two bowed symmetrical pipes each having an inlet and an outlet and being perforated along their lengths, a connector for the pipe inlets of each set comprising a pair of oppositely extending arms to each of which an inlet of a said pipe is axially connected, and inlet arm means extending transversely of said oppositely extending arms, a connector for the pipe outlets of each set comprising a pair of oppositely extending arms to each of which an outlet of a said pipe is axially connected, and outlet arm means of said last mentioned connector extending transversely of said arms thereof, the outlets of the pipes of one set being connected to the inlets of the pipes of a succeeding set by a said connector having two pairs of coplanar oppositely extending arms transverse to each other, a housing for said pipes and connectors, and sound absorbing material occupying the space in said housing around said pipes and connectors.
Claim 3
Dependent Claim
21 words
The silencer of claim 1, wherein the diameter of a said bowed pipe is not greater than one-fourth the length thereof.
References 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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |