US2073480A - Muffling device - Google Patents
Muffling device Download PDFInfo
- Publication number
- US2073480A US2073480A US746778A US74677834A US2073480A US 2073480 A US2073480 A US 2073480A US 746778 A US746778 A US 746778A US 74677834 A US74677834 A US 74677834A US 2073480 A US2073480 A US 2073480A
- Authority
- US
- United States
- Prior art keywords
- exhaust
- cylinder
- chamber
- casing
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/001—Gas flow channels or gas chambers being at least partly formed in the structural parts of the engine or machine
Definitions
- This invention relates to muffling devices, and more particularly to an exhaust muiiiing device for fluid actuated motors.
- One object of the invention is .to effectively suppress the sound waves induced by the emission of the fluid from the motor and to transform the exhaust impulses into a substantially steady stream.
- Another object is to provide a simpliied and effective structure which will not add materially to the weight of the motor to which it is appended and which may be readily and cheaply replaced.
- Figure l is a sectional elevation of a muffling device constructed in accordance with the practice of the invention and showing it applied to a uid actuated rotary motor, the latter being partly broken away, and
- Figure 2 is a transverse View taken through Figure 1 on the line 2 2.
- the muiiling device designated, in general, by 20 is shown applied to a fluid actuated rotary tool 2
- the cylinder 22 has a bore 25 to accommodate a liner 26 the interior of which constitutes a piston chamber 21 containing a rotor 28 having shaft portions 29 which extend into anti-friction bearings 30 in the cylinder and the back head.
- the rotor has a plurality of radial slots 3
- the exhaust uid passes from the chamber 21 through a series of exhaust ports 35 in the liner 26 and through a recess dened by the liner and the bore 25, to an exhaust port 31 in the wall of the cylinder 22.
- the muiiiing device 29 is arranged on the exterior of the cylinder 22 adjacent the exhaust port 31. It is encased by a hollow extension 38 which may be an integral part of the cylinder and the interior of which constitutes an exhaust chamber 39. Overlyng the outer end of the chamber 39 is a plate 49 which seats against the extension 38 and is secured in position by a bolt 4l extending through the muliling device and threaded into a boss I8 on the outer surface of the cylinder 22.
- the plate 40 is of less width than the open end of the chamber 39 to define an exhaust port 45 through which the fluid issuing from the sheet 42 may pass to the atmosphere.
- the muiiling device 2U consists of a sheet 42 of permeable material, as for example, felt.
- the sheet is preferably folded to U-shape of which the curved portion lies adjacent the wall of the cylinder and the legs lie on opposite sides of the bolt 4I and seat upon the plate 4D.
- the sheet extends from one side wall to the other of the chamber 39 and its upper edge seats against the boss and combines therewith and with the wall of the cylinder to deiine openings l9 on opposite sides of the boss for the passage of the major portion of the exhaust uid from the port 31 to the port 45.
- a suitable container is provided for the sheet 42 in the form of a U-shaped plate 43 of which the curved portion and the legs lie exteriorly of the corresponding portions of the sheet.
- the container is preferably of the same length and height as the sheet 42 and has a series of perforations 44 through which exhaust uid may pass into and from the sheet 42.
- the present invention has been found to be a highly efficient device for suppressing the sound vibrations caused by the intermittent impulses of the exhaust uid issuing from the motor.
- the exhaust fluid Upon entering the chamber 39 the exhaust fluid is expanded and in passing through the chamber the impulses are evened out without causing any appreciable back pressure.
- the eX- haust fluid therefore, finally passes through the exhaust port 45 as a substantially constant stream.
- a muiler comprising a casing having an expansion chamber, said casing having an inlet opening and an outlet opening, a cover plate for one end of the casing and cooperating with the casing to define the outlet opening, a wall of permeable material extending from one side wall to the other of the casing between the openings and cooperating with the top of the casing to ce a passageway from the inlet opening to the outlet opening, and a bolt extending through the cover plate and the wall and being threaded into the casing to secure the cover plate and the wall rigidly to the casing.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Motor Or Generator Frames (AREA)
Description
arch 9,' H937.
F. A. JIME-RSON 2,@73948@ MUFFL ING DEVICE Filed Oct. 4, 1934 N f @gk v BY RVEY
Patented Mar. 9, 1937 UNITED STES PATENT OFFICE MUFFLING DEVICE Application October 4, 1934, Serial No. '146,778
1 Claim.
This invention relates to muffling devices, and more particularly to an exhaust muiiiing device for fluid actuated motors.
One object of the invention is .to effectively suppress the sound waves induced by the emission of the fluid from the motor and to transform the exhaust impulses into a substantially steady stream.
Another object is to provide a simpliied and effective structure which will not add materially to the weight of the motor to which it is appended and which may be readily and cheaply replaced.
Other objects will be in part obvious and in part pointed out hereinafter.
In the drawing accompanying this specification and in which similar reference numerals refer to similar parts,
Figure l is a sectional elevation of a muffling device constructed in accordance with the practice of the invention and showing it applied to a uid actuated rotary motor, the latter being partly broken away, and
Figure 2 is a transverse View taken through Figure 1 on the line 2 2.
Referring more particularly to the drawing, the muiiling device designated, in general, by 20 is shown applied to a fluid actuated rotary tool 2| comprising a cylinder 22 and front and back heads 23 and 24 which may be secured to the cylinder in any suitable manner.
The cylinder 22 has a bore 25 to accommodate a liner 26 the interior of which constitutes a piston chamber 21 containing a rotor 28 having shaft portions 29 which extend into anti-friction bearings 30 in the cylinder and the back head. The rotor has a plurality of radial slots 3| in which are disposed vanes 32, and in one side of the liner are a series of inlet ports 33 which communicate with a supply passage 34 to admit pressure uid into the chamber 21' for operating the rotor 28. The exhaust uid passes from the chamber 21 through a series of exhaust ports 35 in the liner 26 and through a recess dened by the liner and the bore 25, to an exhaust port 31 in the wall of the cylinder 22.
The muiiiing device 29 is arranged on the exterior of the cylinder 22 adjacent the exhaust port 31. It is encased by a hollow extension 38 which may be an integral part of the cylinder and the interior of which constitutes an exhaust chamber 39. Overlyng the outer end of the chamber 39 is a plate 49 which seats against the extension 38 and is secured in position by a bolt 4l extending through the muliling device and threaded into a boss I8 on the outer surface of the cylinder 22. The plate 40 is of less width than the open end of the chamber 39 to define an exhaust port 45 through which the fluid issuing from the sheet 42 may pass to the atmosphere.
In the form of the invention illustrated, the muiiling device 2U consists of a sheet 42 of permeable material, as for example, felt. The sheet is preferably folded to U-shape of which the curved portion lies adjacent the wall of the cylinder and the legs lie on opposite sides of the bolt 4I and seat upon the plate 4D. The sheet extends from one side wall to the other of the chamber 39 and its upper edge seats against the boss and combines therewith and with the wall of the cylinder to deiine openings l9 on opposite sides of the boss for the passage of the major portion of the exhaust uid from the port 31 to the port 45.
A suitable container is provided for the sheet 42 in the form of a U-shaped plate 43 of which the curved portion and the legs lie exteriorly of the corresponding portions of the sheet. The container is preferably of the same length and height as the sheet 42 and has a series of perforations 44 through which exhaust uid may pass into and from the sheet 42.
In practice the present invention has been found to be a highly efficient device for suppressing the sound vibrations caused by the intermittent impulses of the exhaust uid issuing from the motor. Upon entering the chamber 39 the exhaust fluid is expanded and in passing through the chamber the impulses are evened out without causing any appreciable back pressure. The eX- haust fluid, therefore, finally passes through the exhaust port 45 as a substantially constant stream.
I claim:-
A muiler comprising a casing having an expansion chamber, said casing having an inlet opening and an outlet opening, a cover plate for one end of the casing and cooperating with the casing to define the outlet opening, a wall of permeable material extending from one side wall to the other of the casing between the openings and cooperating with the top of the casing to denne a passageway from the inlet opening to the outlet opening, and a bolt extending through the cover plate and the wall and being threaded into the casing to secure the cover plate and the wall rigidly to the casing.
FRANCIS A. JIMERSON.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US746778A US2073480A (en) | 1934-10-04 | 1934-10-04 | Muffling device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US746778A US2073480A (en) | 1934-10-04 | 1934-10-04 | Muffling device |
Publications (1)
Publication Number | Publication Date |
---|---|
US2073480A true US2073480A (en) | 1937-03-09 |
Family
ID=25002298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US746778A Expired - Lifetime US2073480A (en) | 1934-10-04 | 1934-10-04 | Muffling device |
Country Status (1)
Country | Link |
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US (1) | US2073480A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787251A (en) * | 1955-02-08 | 1957-04-02 | James E Becker | Muffled vibrator |
US2943695A (en) * | 1957-10-23 | 1960-07-05 | Jeffords Joseph | Silencer |
US3009249A (en) * | 1956-10-25 | 1961-11-21 | Weber Dental Mfg Company | Fluid-driven dental handpiece construction |
US3255844A (en) * | 1964-01-16 | 1966-06-14 | Gardner Denver Co | Multi-passage silencer for pneumatic tool |
US3809179A (en) * | 1973-04-18 | 1974-05-07 | Dresser Ind | Exhaust muffler for pneumatic tools |
US3823795A (en) * | 1973-05-30 | 1974-07-16 | Black & Decker Mfg Co | Air tool muffler |
US20100140015A1 (en) * | 2007-05-09 | 2010-06-10 | Stephan Weber | Silencer |
US20100288581A1 (en) * | 2008-01-04 | 2010-11-18 | Audeval Solutions Inc. | Muffler for pneumatic handheld tool |
-
1934
- 1934-10-04 US US746778A patent/US2073480A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787251A (en) * | 1955-02-08 | 1957-04-02 | James E Becker | Muffled vibrator |
US3009249A (en) * | 1956-10-25 | 1961-11-21 | Weber Dental Mfg Company | Fluid-driven dental handpiece construction |
US2943695A (en) * | 1957-10-23 | 1960-07-05 | Jeffords Joseph | Silencer |
US3255844A (en) * | 1964-01-16 | 1966-06-14 | Gardner Denver Co | Multi-passage silencer for pneumatic tool |
US3809179A (en) * | 1973-04-18 | 1974-05-07 | Dresser Ind | Exhaust muffler for pneumatic tools |
US3823795A (en) * | 1973-05-30 | 1974-07-16 | Black & Decker Mfg Co | Air tool muffler |
US20100140015A1 (en) * | 2007-05-09 | 2010-06-10 | Stephan Weber | Silencer |
US8191675B2 (en) * | 2007-05-09 | 2012-06-05 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Silencer |
US20100288581A1 (en) * | 2008-01-04 | 2010-11-18 | Audeval Solutions Inc. | Muffler for pneumatic handheld tool |
US8047327B2 (en) | 2008-01-04 | 2011-11-01 | Audeval Solutions Inc. | Muffler for pneumatic handheld tool |
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