US2190396A

US2190396A - Muffler

Info

Publication number: US2190396A
Application number: US264020A
Authority: US
Inventors: Roy L Brooks
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-03-24
Filing date: 1939-03-24
Publication date: 1940-02-13
Anticipated expiration: 1957-02-13

Description

Feb. 13, 1940. R. L. BROOKS MUFFLER Filed March 24, 1939 flay Z. 3700 K5 INVENTOR ATTORNEYS Patented Feb. 13, 1940 UNITED STATES PATENT OFFICE Application'March 24,

3 Claims.

The invention relates to a mufiler and more especially to an exhaust silencer for use on internal combustion engines, Diesel or other motors. 5 The primary object of the invention is the provision of a mulller or silencer of this character, wherein the same when in use is devoid of obstruction for causing back pressure such as ordinary mufile-rs have and exhaust gases pass out freely but when. the air rushes back it is interrupted and effects a vacuum so as to pocket the air when rushing'back and in this way deadening the sound or noises which would otherwise result and at the same time assures proper motor performances with resultant increase in power and saving of fuel as well as minimizing valve trouble.

Another object of the invention is the provision of a muiller or silencer of this character, wherein the same can be readily disassembled so that it may be conveniently cleaned when the occasion requires and will eliminate back pressure in motors.

A further object of the invention is the provision of a mufiler or silencer of this character, wherein the construction thereof is novel in its entirety and the exhaust of an internal combustion engine or the like is operated upon when delivered from the combustion chamber at the end of the power stroke and the noise or sound incident thereto will be nullified.

A still further object of the invention is the provision of a mufller or silencer of this character, which is simple in construction, thoroughly reliable and efiicient in operation, strong, durable,

and inexpensive to manufacture and install.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation, partly broken away, of a muflier or silencer constructed in accordance with the invention.

Figure 2 is a fragmentary vertical longitudinal sectional view through the muffler or silencer.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2 looking in the direction of the arrows.

Figure 4 is a perspective view of one of the funnel units of the muifler or silencer.

Similar reference characters indicate corre- 1939, Serial No. 264,020

(Cl. ISL-48) sponding parts throughout the several views in the drawing.

Referring to the drawing .in detail, A designates generally the niufiler or silencer in its entirety as involving a silencer jacket or body 5, its opposite open ends being closed by nippled heads or disk-like end pieces 6, the nipples 1' being extended outwardly centrally thereof for inlet and outlet communication and one of these nipples is coupled with the exhaust pipe of an internal combustion engine, a portion of the exhaust pipe being indicated at 8, while the other nipple i is coupled with the discharge end of said exhaust pipe, a portion thereof being indicated at 9. the pipe 8 being next to the exhaust manifold of the engine, these being not shown.

The heads or end pieces 6 are provided with peripheral annular seats 10 for the end edges of the jacket 5 and passed through the said heads or end pieces are tie bolts H, which join the L jacket and heads or end pieces together, as is clearly shown in Figure 2 of the drawing.

Arranged interiorly of the jacket 5 are spaced centrally perforated ring-like baflies I2 separated from each other by spacer parts l3, each of annular formation and of less diameter than the cross sectional diameter of the jacket 5. The baiiles l2 are slidably supported on the tie rods H interiorly of the jacket and have their center perforations or openings M aligned with each other and with the exhaust pipe sections 8 and 9, respectively, being of a size slightly greater than the cross sectional internal diameter of the said pipe sections.

Built upon or associated with the bailles l2 at the perforations or openings 44 are truncated. funnels l5, these being disposed in the same direction to each other and alternate funnels l5 concentricallyof the center openings 15 therein are provided with spaced apertures H. the heads or end pieces 6, that is, the one remote from the exhaust manifold, is threaded set screws 1 8, these working against the baffle l2 next there to and in this manner the bafiies i2 with the funnels i5 associated therewith and the spacer members l3 are held in a fixed assembly within the jacket 5 to avoid any displacement relative to each other.

In the use of the mufiler or silencer constructed in accordance with the invention hereinbefore set forth, there will be no obstruction to exhaust from the engine causing back pressure such as ordinarily exists with the conventional mufiles and the exhaust gases pass out freely from the said muiller but when air rushes back, it is interrupted In one of by the funnels, being so arranged as to'pocket the air rushing back and in this manner deadens or nullifies noises or sound resulting in the silencing of the exhaust from the engine. The air passing through the holes I! will be broken up and the funnels devoid of the perforations I! will block the air and in this Way back pressure is nullified and noises or sounds minimized or eliminated.

What is claimed is:

1. A muffler comprising a cylindrical body, nippled endfheads at opposite ends thereof, tie rods passing through the cylindrical body and connecting the said end heads, and a plurality of baflies fitting the tie rods and having funnels registering with each other, the funnels of alternate baflies being perforated.

2. A muflier comprising a cylindrical body;

nippled end heads at opposite ends thereof, tierods passing through the cylindrical body and between the battles for the spacing thereof relative to each other.

3.A mufiier comprising a cylindrical body, nippled end heads at opposite ends thereof, tie rods passing through the cylindrical body and con necting the said end heads, a plurality of baflies fitting the tie rods and having perforated funnels registering with each other, the funnels of alternate baffles being perforated spacers between the bafiles for the spacing thereof relative to each other, and means engaged with one end head and active upon a baflle adjacent thereto to hold the same in their spaced assembled relation to each other.

ROY L. BROOKS.