1. Doosan Infracore - Portable Power
CONFIDENTIAL
Doosan Infracore - Portable Power
Upright Rammers
Date:

2. RX-RAMMERS

3. How it Works

4. Current Models and Nomenclature
RX-304H
Upright Rammer
3000 lbs
Impact
force
4-Cycle
Honda
Engine
RX-344H
RX-304H
RX-264H

5. Rammer Features & Benefits
4-Point isolation for component longevity
Vibration reducing grips to minimize operator fatigue
Self balancing design, for maximum force exertion to ground, and ease of operation
Accessible throttle control
Durable wooden foot reinforced with a steel plate for extended life
4-Cycle Honda engine with recoil start on all models
No Oil / Gas mixing
Oil Splash Lubrication reduces need for daily greasing and ensures continues protection for internal parts

6. Performance Specs
Impact Force measured on an average – not the peak reading

7. Competition

8. 2-Cycle Evaluation
Good Weight to Power Ratio
Minimal Parts (No Valves)
Cheap to Manufacture

9. Phase 1 of 2-Cycle
Spark Plug Fires igniting compressed air/oil/gas mixture
Pistons returns to Bottom and hydrocarbon gas exits due to pressurizing of crank case
Exhaust consists of Pollutant Oil (smoke) and Burned Gas Mixture
Piston Bottoms out

10. Phase 2 of 2-Cycle
Vacuum opens up Reed Valve allowing gas/oil/air mix entrance
Momentum from pressurized Crank Case forces piston up, while compressing air/gas/oil mixture
Intake Exhaust port Overlap allows unused oil/gasoline mixture to escape
Cycle Starts over with spark plug firing every rotation

11. 4-Cycle Evaluation
Features of a Honda 4-Cycle Engine
Oil Splash - Dedicated Lubrication
No Gas/Oil Mixture
Rugged and Reliable
Air Cooled
Overhead Cam

12. 2-Cycle Disadvantages
2-cycle lifespan is not as long as 4-cycle engines
The lack of a dedicated lubrication system wears the components of a 2-cycle engine faster.
2-cycle oil is expensive
A typical 2-cycle engine requires approximately 4 oz. Per gallon of gasoline.
2-cycle engines are not fuel efficient
2-cycle engines produce high levels of Pollution
Some environmental experts suggest that they will soon become unavailable, due to emissions legislation
2- cycle engines are significantly louder than 4-cycle engines

13. “I like to feel the Tamper work !”
Energy Exerted to Operator Means
Less Impact to ground
Higher Levels of Operator fatigue
Higher Bounce, less productivity
Longer compaction times
More Consumption of Fuel
Energy In = Energy Out
RX-Series is well isolated to keep the energy channeled away from the operator and into the material being compacted

14. 3 Key Points 4-Cycle Honda engine with recoil start on all models
CLEANER – QUIETER – MORE RELIABLE – FUEL ECONOMY – NO GAS/OIL
Self Balancing Design
CONSERVES ENERGY – REDUCES OPERATOR FATIQUE – INCREASES PRODUCTIVTY
Industry Leading Impact Forces
JOBSITE PRODUCTIVTY

15. Market
$ Million per year
Earth Moving Contractors
Road Builders
Residential Contractors
Utility/Municipal Applications
Irrigation Placement
Cemeteries

16. Mixed and Cohesive Soils Require Impact force
Rammer Applications
Confined Spaces
Mixed and Cohesive Soils Require Impact force
Molecular Attraction between particles holds soil together
Impact Force shears this bond, while squeezing out air and water
Before
After
Clays & Silts or Very fine soils

17. Rammer Applications
Backfill around foundation forms
Compaction of base & backfill around structures & footings
Compacting backfill of utility line trenches
Base preparation for asphalt patching
Gravesite Compaction