Shock-Absorber Page: 2 of 2
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UNITED* STATESPATENT OFFICE
GRE'ENE E. NEWELL, OF HOUSTON, TEXAS.
Specification of Letters Patent. Patented elly 8, 1913.
Application filed November 19, 1912. Serial No. 732.313.
To all w/om, .t m.aiy concern:
le it known that I, GjitIMEN IE. NEwELt, a
citizen of the United States, residing at
.1Hfouiston, in the comty of harris and State
5 of Texas, have invented new and useful Im-
)roveIments in Shock - Absorbers, of which
the following is a specification.
This invention relates to shock absorbers
for use upon automobiles and other vehicles,
10 in which springs are employed between the
axle and the body of the vehicle, the object
in view being to provide a device of the
class referred. to adapted for use in conjunc-
tion with the ordinary springs to prevent ex.-
15 cessive operation of the springs, both in the
downward and upward thrust of the body of
the machine, also avoiding to a large extent
the .liability of the springs being fractured
by sudden impacts met with on rough roads.
20 With the above and other objects in view,
the invention consists in the.. construction,
combination and arrangement of parts, as
will be hereinafter more fully described,
illustrated in the accompanying drawings,
25 and pointed out in the claim hereunto ap-
Tn the drawings: Figure 1 is a side eleva-
tion, showing the shock absorber applied to
an automobile. Fig. is a vertical diamuet-
30 rieal section through the shock al)sorber on
an enlarged scale. -Fig. 3 is, a bottom plan
view of the cylinder.
rThe shock absorber contemplated in this
invention comprises a cylinder 1, a piston 9,
35 and a pistO oi 0(13. The piston 2 is immperfo-
rite and is designed to fit closely to the in-
ner peripheral wall of the cylinder, so as to
l)reCveiit the air from passing around Ii(the
peripheral edge of the pist(1. The rod 3 is
40 connected rigidly to th( piston and extend'
through the head 4 of the cylinder, the oppo-
site head 5 Iheig imiipetforate.-
In (ariryinlg o it the present inveitioni the
peipiheral wal l 6 of the cylinders is provided
45 with ((ir11i1r series of flom r nted vents 7
in the f'ImI nof slots wi 11"c -ar sistlantIally
(llianioln-shlaped. i other o' s, each of
the slots is \\id( st at its ((enter, which corre-
s)oids 1p1)1roximfl.tely within thle center of
50 the cylinder bhI e , the li ohs 4 nid 5
thereof, said slots tapering in both direc-
tions 1n1( terminating in acute angles 8,
which are located a suitable (listao -e from
the adjaent. heads 4 and 5, so that when
the piston approaches close to either head 5rr
of the cylinder, an air eushion will be estib-
lished l)eIveen the piston indl such head of
the cylinder, which will effectually check
the further operation of the device.
It will le observed frmn the foregoing pO
description, tolen in connection with the 'c-
comlpanyig imdrawings, that in its interniedi-
ate or:central position, the piston has very
little influence over the springs of the ma-
chine, which are thereby allowed to act with s
comparative freedom. IIowever, as the pis-
ton approacles either the head 4 or the head
5 of. the cylinder, the vent slots are gtadu-
ally (lt off or closed, and this gives a grad-
ial check to the movement of the piston, 70
and consequently to the springs of the vehi-
cle, it being understood that the cylinder is
connected to the body of the vehicle, while
the piston rod is connected to one of the
axles, or vice versa. 75
The constrlctiori above described does
away with all adjustable resistance or check
valves, the slCt5 7 performing the function
of such valves and giving a gradual increase
in the resistance to the movements of the SO
pistol shack ad forth in the cylinder.
What is claimed is:
A. pneiminatic shock absorber for vehicles
comprising an air eylinider closed at both
ends. an imperforate piston moited to re- s
ip(rorate therein, aiid a piston rod passing
tlroui Ii< \ne endlof the cylinder, the cylin-
derL having its. .circular wall perforated ihv
,111 anilar series Of narrow diamond shaped
veiii slots olel to (e atmiiisphere, said slots 90
I cnig widest at the center and tapeiriiig
threfromi toward the opposite ends of the
c. 1 ioder a in(t enmi inating at a. distance from
the ('11(5 of the cinder.
liI estimiy(iii' wheeot I afhIx ily i'signa--
tiure iii lprISnC(ii (of 1 w(O wit iiesses.
(l1'ENE E. NEWELL.
S. .1 II xwso.
1 06 1 30
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Newell, Greene E. Shock-Absorber, patent, July 8, 1913; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth854139/m1/2/: accessed October 19, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.