The document presents information about a hydraulic press. It discusses how a hydraulic press works using Pascal's law, allowing a small force applied to the plunger to lift a much larger weight using the ram. It provides the history of the hydraulic press being invented by Joseph Bramah. Key equations are presented showing the relationship between the applied force, areas of the plunger and ram, and the weight lifted. Numerical examples are also included.

1. Presentation
Topic Hydraulic Press
Presented To Engr. Umar Khalidoon
Presented By Muhammd Hasnain
2016-BT-Mech-714
Umar Farooq
2016-BT-Mech-726
M.N.S U.E.T Multan

2. Hydraulic Press
• The hydraulic jack/Press is a device used for
lifting heavy loads by the application of much
smaller force.
• It is based on Pascal’s law, which states that
intensity of pressure is transmitted equally in
all directions through a mass of fluid at rest.

3. History of Hydraulic Press
• It was actually invented by Joseph Bramah, so
is also known as the Bramah Press.

4. Working Principle
• The working principle of a hydraulic
jack/Press explained.
• Consider a ram and plunger, operating in two
cylinders of different diameters, which are
interconnected at the bottom, through a
chamber, which is filled with some liquid.

5. Working

6. Working
• Let
• W= Weight to be lifted,
• F = Force applied on the plunger,
• A = Area of ram, and
• a = Area of plunger.

7. Working
• Pressure intensity produced by the force F, p =
F/Area of plunger = F/a
• As per Pascal’s law, the above intensity p will be
equally transmitted in all directions.
• Therefore, The pressure intensity on ram = p = F/a
= W/A or W= F(A/a)

8. Working
• Equation indicates that by applying a small force F
on the plunger, a large force W may be developed
by the ram.
• Mechanical advantage of press = A/a
• If the force in the plunger is applied by a lever
which has a mechanical advantage (L/l) then total
mechanical advantage of machine = (L/l)(A/a)
• The ratio (L/l) is known as leverage of press

9. Numerical Portion Solved By
UMAR FAROOQ
2016-BT-MECH-726
Example#39.1
Example#39.2