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US3584701A Expired / Lapsed US ⏱️ 0.0 years remaining

Sound and resonance control device

Assignee: Individual
•
Filing: 1970-04-07
•
Granted: 1971-06-15
•
Expires: 1990-04-07
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Abstract

Abstract Sound and resonance apparatus for systems engaged in dissipating gases under varying temperature, pressure and velocity conditions. The present invention is directed to control systems adapted to muffle and/or silence the explosive sound of gas emulsion under elevated temperature, pressure and high velocities as in exhaust gases emitted from various engines such as combustion engines, industrial tubular structures, firearms and the like by directing said gas into a muffler device or system having a concave end of a helicoidally formed body by casting or provided by a strip wound into a number of helicoidal cones; namely, and helicoidal cones having their transverse surfaces inclined, pitched or sloped at an angle within controlled limits to the axis of the helicoid and distance between the base and apex of each of said helicoid cones; namely, the frustums, by which is meant a spatially formed helicoidal cone being within prescribed spaced limits in order to effect maximum efficient as to resonance and sound control and the beneficial utilization of the exhaust gases to do work.

Inventors

  • 👤 Michael W Freeman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:59
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/12; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/2882; F01N3/2885; F01N1/02; F01N2230/00; F01N2230/04; F01N2490/00; F01N2490/20; Y; Y02; Y02A; Y02A50/00; Y02A50/20

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 129 words
A new and improved silencing device comprising an elongated tubular casing having an inlet and outlet opening for exhaust gases and having in said casing a helicoidal conelike structure through which the exhaust gases flow at elevated temperature and pressure and at a high velocity in a spiral movement the slope angle of the helical cone structure being between about 20* and 90*, the spacing for each of the helical cones being within specified limits, the ratio diameter of the cone to the length of the muffler being from about 0.015 to 0.7, the ratio of the diameter of the cone to the orifice ranging from infinite to 2 and the ratio of the diameter of the cone to the spacing of the helicoils ranging from 5 to 0.5.
Claim 2
Dependent Claim 129 words
A new and improved silencing device comprising an elongated tubular casing having an inlet and outlet opening for exhaust gases and having in said casing a helicoidal conelike structure through which the exhaust gases flow at elevated temperature and pressure and at a high velocity in a spiral movement the slope angle of the helical cone structure being between about 20* and 90*, the spacing for each of the helical cones being within specified limits, the ratio diameter of the cone to the length of the muffler being from about 0.015 to 0.7, the ratio of the diameter of the cone to the orifice ranging from infinite to 2 and the ratio of the diameter of the cone to the spacing of the helicoils ranging from 5 to 0.5.
Claim 3
Dependent Claim 44 words
The device of claim 1 being a muffler wherein the ratio of the diameter of the cone to the spacing of the helicoils ranges from 2 to 0.5 said muffler being capable of inhibiting resonance and utilizing the exhaust gases to produce useful work.
Claim 4
Dependent Claim 32 words
The muffler of claim 2 designed for combustion engines, said muffler having a plurality of helicoidal cones, the slope angle of each cone increasing progressively from the inlet to the outlet opening.
Claim 5
Dependent Claim 32 words
The muffler of claim 2 designed for combustion engines, said muffler having a plurality of helicoidal cones, the slope angle of each cone decreasing progressively from the inlet to the outlet opening.
Claim 6
Dependent Claim 12 words
The muffler of claim 3 having holes in said helicoidal cone structure.
Claim 7
Dependent Claim 12 words
The muffler of claim 4 having holes in said helicoidal cone structure.
Claim 8
Dependent Claim 16 words
The muffler of claim 3 wherein the helicoidal cones are out of phase with each other.
Claim 9
Dependent Claim 16 words
The muffler of claim 4 wherein the helicoidal cones are out of phase with each other.
Claim 10
Dependent Claim 8 words
The muffler of claim 1 having curved deflectors.

References Cited (Backward Citations)

US1003531A Cited
US1127892A Cited
US2274599A Cited
US2300130A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-06-14 1974-12-14 1975-06-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-06-14 1978-12-14 1979-06-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-06-14 1982-12-14 1983-06-15 $7700.00 Window Closed / Lapsed

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