US3590945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuned resonance mufflers
Assignee: Individual
•
Filing: 1970-04-03
•
Granted: 1971-07-06
•
Expires: 1990-04-03
Abstract
Abstract An exhaust tube has transverse cooling fins extending from two opposite sides. A restrictive band circles the exhaust gas emitter to hold the tube entry port against the emitter exhaust port. A U-shaped bracket extends from adjacent the exit port of the tube, which has either a fixed or an adjustable baffle secured transversely of the legs of the U. A resilient sheath covers the bracket and is sealed to the tube at one end and open at the other end but blocked by the base bar of the U-shaped bracket. Gas passes about each transverse edge of the baffle, distending the sheath. Gas passes the end base bar, also, so that the sheath pulsates in two zones in accordance with the gas output and the position of the baffle with respect to the length of the gas column.
Inventors
- 👤 Milo E Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:54
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; F01N1/00; F01N1/02; F01N1/023; F01N1/16; F01N1/22; F02; F02B; F02B75/00; F02B75/34; F01N2260/00; F01N2260/02; F01N2450/00; F01N2450/22; F01N2450/24; F01N2470/00; F01N2470/20; F01N2530/00; F01N2530/06; F01N2530/18; F01N2530/26; Y; Y10; Y10S; Y10S181/00; Y10S181/404
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A tuned resonance muffler for exhaust gases emerging from an emitting device having an exhaust port and comprising a metallic tube, an entry port on the tube, means adapted to secure the tube at the gas exhaust port such that the gases exhaust into the tube entry port, an exhaust outlet on the tube, an open support bracket extending from the tube outwardly of the outlet, a transverse baffle across the bracket, a flexible sheath surrounding the bracket, means securing an end of the sheath to the tube in gastight fashion, the other end of the sheath being open and in movable contact with the bracket surface and the median portion of the sheath being in displaceable contact with the baffle so as to fluctuate from the baffle to periodically exhaust gases past the baffle, and heat-dissipating means on the tube.
Claim 2
Dependent Claim
141 words
A tuned resonance muffler for exhaust gases emerging from an emitting device having an exhaust port and comprising a metallic tube, an entry port on the tube, means adapted to secure the tube at the gas exhaust port such that the gases exhaust into the tube entry port, an exhaust outlet on the tube, an open support bracket extending from the tube outwardly of the outlet, a transverse baffle across the bracket, a flexible sheath surrounding the bracket, means securing an end of the sheath to the tube in gastight fashion, the other end of the sheath being open and in movable contact with the bracket surface and the median portion of the sheath being in displaceable contact with the baffle so as to fluctuate from the baffle to periodically exhaust gases past the baffle, and heat-dissipating means on the tube.
Claim 3
Dependent Claim
20 words
A muffler in accordance with claim 1 wherein the sheath and the support bracket define a normally closed rectangular volume.
Claim 4
Dependent Claim
17 words
A muffler in accordance with claim 1 wherein the transverse baffle is adjustable longitudinally of the bracket.
Claim 5
Dependent Claim
81 words
A muffler in accordance with claim 1 wherein the bracket comprises parallel side members each fixed at one end to the tube, an end member remote from the tube approximating the size and configuration of the end opening of the sheath, a longitudinally adjustable support shaft mounted in the end member, and means securing the baffle to the support shaft such that longitudinal motion of the shaft imparts motion to the baffle to reposition the baffle for tuning the muffler resonantly.
Claim 6
Dependent Claim
24 words
A muffler in accordance with claim 1 wherein the means adapted to secure the tube at the gas exhaust port comprises an elastic loop.
Claim 7
Dependent Claim
26 words
A muffler in accordance with claim 5 wherein the elastic loop comprises a spirally wound steel wire fixed at each of its ends to the tube.
Claim 8
Dependent Claim
15 words
A muffler in accordance with claim 1 wherein the heat-dissipating means comprises outwardly extending fins.
Claim 9
Dependent Claim
29 words
A muffler in accordance with claim 7 wherein the heat-dissipating means further comprises longitudinal metallic spaced walls within the tube in contact with the inner periphery of the tube.
Claim 10
Dependent Claim
30 words
A muffler in accordance with claim 1 wherein the sheath comprises a tube of approximately rectangular tranSverse configuration, said tube being of silicone rubber of 30 to 60 shore quality.
Claim 11
Dependent Claim
43 words
A muffler in accordance with claim 1 wherein the fit between the sheath and the bracket is such that pulsating exhaust gases cause alternate lifting of the sheath from a portion of the bracket and restriction of the sheath against the bracket portion.
Claim 12
Dependent Claim
49 words
A muffler in accordance with claim 1 wherein the support bracket comprises spaced side members each fixed at one end to the tube, an end member remote from the tube exhaust outlet, and a transverse tuning baffle fixed to the side members intermediate the end member and the outlet.
References Cited (Backward Citations)
US3482649A
Cited
US3497031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |