Duff-Norton RAM-PAC - Page 2

FOREWORD
The Duff -Norton Company's Ram-Pac
Line of
hydraulic products is
carefully engineered and
continually studied and improved to give
the
highest quality and the greatest
reliability to
be found in
any hydraulic jack. Precision
tooling,
skilled workmanship, careful han-
dling and
painstaking assembly all contribute
to giving the Ram-Pac Hydraulic Units the
highest possible quality and reliability. Each
unit
is carefully tested to insure that.it meets
the most
exacting test requirements.
EXPLANATION Of THE
HYDRAULIC
PRINCIPLE
In
1648, Blaise Pascal fi rst
stated the
fundamental
hydraulic principle that
"hydraulic
pressure in a confined liquid
is transmitted
undiminished in all di-
rections."
This principle has been
utilized in the
RAM
-PAC line and may
be illustrated
and
explained in the
following manner:
First,
a lever arm is
used to
magnify
the input effort by a ratio
of about 20:1.
This
magnified resultant force (2000
lbs.) is
applied to a small diameter pump
plunger where it builds
up a very high
hydraulic pressure of 10,000 lbs. per
square inch. This
high pressure is trans-
mitted
undiminished by means of a hy-
draulic hose
to a large diameter
hydrau-
lic cylinder where it
acts on a much
larger
area, and
thus can raise very
heavy
loads.
EXAMPLE:
FORCE
2,000 Lbs.
OIL PRESSURE=
AREA
0.2 sq. In. -
10,000 Lbs./Sq. In.
Dia. of R -10-H-11 Cyl.= 1 % In. Area = 2.0 Sq. In.
FORCE = OIL PRESSURE x AREA OF CYLINDER
=
10,000 Lbs./Sq.
In. x 2.0 Sq. In.
= 20,000 Lbs.
= 10
Tons
2000
Riesul44a4 Fore*
Pt)
MP
1,11r Pt
Pomp Pharr
Ms
A.1.
ft
.
ha
Plop
AIM
2.001
—OH P.
-a aura 10,001
lits15.14. b.
RAM
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