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Патент USA US2404490

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July 423, 1946.
' l
1M. Hm
~ ’
2,404,490
AMPHIBIAN PROPULSION MECHANISM
Fi1ed_Jan. 8, 1.942
/0
A Tram/5y
2,404,490
Patented July 23, 1946
UNITED vSTATES ‘PATENT OFFICE
James M. Hait, San Gabriel, Cali-f., assignor to
Food Machinery Corporation, San Jose, Calif., a
corporation of Delaware
Application January 8, 19.42', SerialNo. -.426,031
5 Claims.
(Cl. 115-1)
l
This invention relates to amphibian craft and
particularly to a propulsion mechanism for pro
pelling the same either through the water or on
the land.
It is an object of my invention to provide an
r2
The term “rubber” as used herein and in the
claims, is to .be understood as including not only
that material chemically known as rubber, but
all suitable equivalents therefor.
f
It Will be readily seen that the impeller blades
3I in no way interfere with the operation of the
belt II when the tank is traveling on land. In
case the amphibian has to go through very rough
terrain in which trees and the like scrape against
the sides of the craft, the blades 3| being of rub
ber merely yield and after the pressure is re
moved, return to their normal shape.
The term “traction belt” is used herein gener
ically to embrace all belts, chains, or other end
less members suitable for track-forming purposes.
5
vamphibian propulsion mechanism which will uti
lize any conventional traction belt developed f_or
use on tanks to give a rugged supporting medium
for the amphibian while it is traveling on land
and over hard-surfaced highways and yet at th'e
same time develop adequate propulsive thrust
when the craft is traveling through the Water.
It is another object of my invention to provide
an amphibian propulsion mechanism in which
it is unnecessary for the craft to rest on the wa
What I claim is:
ter propulsion blades when the craft is traveling
'
1. In an amphibian propulsion mechanism, the
on land.
combination of t an endless traction belt having
The manner of accomplishing th'e foregoing ob
a tread provided on the traction surface thereof;
jects, as well as further objects and advantages,
an endless series of impeller blades provided on
will be made manifest in the following descrip 20 said belt along one side thereof and out from
tion taken in connection with the accompanying
under said belt, each of said impeller blades in
drawing, in which:
cluding a metal skeleton and a body of rubber
Fig. 1 is a side elevational view of a representa
bonded to said skeleton, said skeleton lying in a
tive portion of a preferred embodiment of the
vertical plane, said body of rubber forming the
25
invention.
`
Fig. 2 is a bottom plan view of Fig. 1.
Fig. 3 is a cross-sectional view taken on the
line 3-3 of Fig. 1.
Referring specifically to the drawing, the pro
pulsion mechanism IIl illustrated therein includes
an endless traction belt II which embodies two
rubber tracks I2 in which are imbedded two series
balance> of `said blade extending laterally out
wardly therefrom.
2. In an amphibian propulsion mechanism, the
combination of : an endless traction belt having
30 a tread provided on the traction surface thereof;
and an endless series of cup-shaped impeller
blades provided on said belt along one side thereof
and out from under said belt, each of said im
peller blades including a metal skeleton lying in
a vertical plane and a body of rubber bonded to
of endless cables I3 and an endless series of metal
clamps I4 which clamp these cables and provide
a support for an endless series of central guides
said skeletonand cooperating therewith to form
I6 which extend inwardly between bogie wheels
an impeller cup which lies outwardly from said
I1 which are mounted on the amphibian and ride
skeleton.
`
on the tracks I2 and support the amphibian
3. In an amphibian propulsion mechanism, the
thereon.
combination of: an' endless traction belt having
Secured to the bottom of the belt II to provide 40 a tread provided on the traction surface thereof;
a tread thereon is an endless series of rubber
and an endless series of impeller blades provided
tread blocks 2li, each of these having a metal base
on said belt along one side thereof, said blades
plate 2I which' is secured to the belt by bolts 22
being formed to have sufficient rigidity when said
and 23, these bolts passing upwardly through
amphibian is traveling in the water to engage
and uniting the base plates 2I withthe clamps
the latter and produce a propulsive force for driv
I4 and the guides I6.
ing said amphibian through the water, yet being «
The base plate 2| of alternate tread blocks 20
yieldable when meeting resistance such' as trees
has an arm 30 bent upwardly therefrom, this
and the like, while said amphibian is traveling,
arm Sil forming the metal skeleton of a rubber
so as to prevent substantial damage to said blades
50
water impeller blade 3l. Each of these impeller
and permit the latter when said resistance has
blades is preferably shaped as indicated in Fig.
been passed, to return to their» original condition
1 so that when the belt I I travels in the direction
suitable for operating in water as aforesaid.
of th'e arrow 35 the impeller b1ades.3I act on
4. In an amphibian propulsion mechanism, the
the water to setl up arpropulsive thrust which
combination of: an endless traction belt having
55
drives the amphibian through the water.
.2,404,490
3
a tread provided on the traction surface thereof; '
and an endless séries of impeller blades provided
on said belt along one side thereof, said blades
being formed to have suflicient rigidity When said
amphibian is traveling in the water to engage
the latter and produce a propulsive forcev for
driving said amphibian through the Water, yet
‘l being yieldable when vmeeting resistance such as
trees and the like, Whilesaid amphibian is vtrav
eling, so as to prevent substantial damage to said
blades and permit the latter when said resistance
has been passed, to return to their original con
dition suitable for operating in Water as afore
said, said blades being formed principailyofïrub
ber.
Y
Y
"
'
5. In an amphibian propulsion mechanism, the f
combination of: an endless traction belt having a .
tread provided on the traction surface thereof;
4
,
and an endless series of impeller blades‘provided
on said belt along one side thereof, said blades
being formed to have sufñcient rigidity when said
amphibian is traveling in the water to engage th'e
latter and produce a propulsive force for driving
said amphibian through> the water, yet being
yieldable when meeting resistance such as trees
>and the> like, while saidV amphibian is traveling,
so as to prevent substantial damage to said blades
and permit the latter when said resistance has'
' been passed, to return to their original condition
suitable for operating in Water as aforesaid, said
blades being formed principally of rubber, and
having a metal reinforcement disposed close to
- the edge of said belt and by Which said blades are
f attached to Vsaid belt.
'
'
JAMES M. HAIT.
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