Directory: Feltenberger Pendulum by Gravitational Energy Corporation

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Commercially Available

Compiled by Congress:Founder:Sterling D. Allan

Pure Energy Systems News

Aug. 3, 2010

The Feltenberger Pendulum Pump by Gravitational Energy Corporation, is a commercially available device that is manually operated and uses "gravity-assisted power" (GAP), coupled to a piston pump, capable of pumping and filtering 1,000 gallons of clean drinking water per hour. It is Directory:Human-Powered, with no fuel required, and little fatigue to the operator – like pushing a child on a swing.

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It is basically a commercially-available version of Directory:Milkovic Two-Stage Mechanical Oscillator secondary oscillation technology.

: "The Feltenberger Pendulum, a unique double reciprocating device (Patent Pending) uses the force of gravity to help provide the power to pump water. We have combined a new power off-take system with a rigid arm pendulum, which makes it much easier to pump water manually than a conventional lever arm pump, which requires a constant push or pull type of action or a hand crank, with a constant turning action. Due to the nature of the pendulum swinging back and forth, it is far easier to provide a short intermittent push to the pendulum once every arc or every over and back cycle to maintain the pumping process, thereby substantially reducing operator fatigue. In this manner, we have achieved a 'gravity assist' in helping us do work."

Water filtration and reverse osmosis equipment can be added to produce clean drinking water. Other attachments will be available soon that can be coupled to the Feltenberger Pendulum that will provide for deep water pumping, well drilling, desalinization and small scale electricity generation.

On June 2, 2010, Gravitational Energy Corporation donated their first pre-production prototype machine for use in Haiti, where it has been providing potable water for 4,000 people daily on just three hours of manual pumping. Running continuously, such a pump could provide enough drinking water for 40,000 people.

This device is recommended for communities seeking to be prepared for extreme Directory:Emergency Preparedness, such as grid power going down for long periods of time. One of the systems advantages is that it runs quietly, especially compared to a fuel-engine based pumping system.

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In addition to the pump application, the company anticipates building large scale Feltenberger Pendulum machines for the purpose of generating commercial grade electricity. The target of these machines is to reduce fuel consumption by about 50 percent.

Official Website

How it Works

About Us

In the News

Press Releases – official YouTube channel

Water Filtration Partner – the company uses the Aquathin R/O system and Aquashield filtration systems.


August 25, 2010

Art Drentlau wrote:

There are a few things thing’s I would like to point out. We changed the capacity to read up to 1000 gph. We are planning a larger hand powered pump but not sure of its out put yet. We are also working on two smaller versions.

We gave Directory:Milkovic Two-Stage Mechanical Oscillator stock in our company for what he is doing to help mankind and have two associates that help him as well. Our system is quite a bit different. We can go 360 and the pump has 4 Pressure Volume settings. We are patenting the pump and it is 92% efficient a centrifugal pump at the same Pressure Volume is about 35%.

We just showed the pump to the US Military and they are very interested in the pump and the technology.


Return To Gravity Assisted Power


Gravitational Energy Corporation of Cuyahoga Falls, Ohio explains the Feltenberger Pendulum's patented technology using Gravity Assisted Power. Its mechanical advantage leverages gravity to do work using less fuel. Tests involving this 18,000 pound pendulum prototype suggest it can generate commercial grade electricity more efficiently than current fossil fuel power plants. (YouTube February 02, 2011)

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Gravity Assisted Power [Overview]


Gravitational Energy Corporation, Located in Cuyahoga Falls, Ohio, presents new technology for pumping water with Gravity Assisted Power. The pump is hand operated, uses no fuel or electricity, is very easy to operate and can produce 1000 gallons of filtered water per hour. The first production model is in Haiti to produce clean filtered water for the people and Hospitals. (YouTube March 2, 2010)

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Water Crisis – A Solution


Gravitational Energy Corporation shows us the water crisis our world faces and how they plan to tackle the lack of access to clean drinking water problem with their Gravity Assisted Power Feltenberger Pendulum Pump and Aquathin filtration system. (YouTube Aug. 2, 2010)

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Kansas City Star Coverage


Kansas City Star news coverage of the "One5 foundation" with the Feltenberger Pendulum at Leawood City Park. The hand operated water pump/filtration unit was donated by Gravitational Energy Corporation of Akron Ohio and will be shipped to Haiti to make clean drinking water. (YouTube March 21, 2010)

How it Works

Quoting from

: "The Feltenberger Pendulum is a unique double-reciprocating pendulum. [See There was an error working with the wiki: Code[1].] As the pendulum rotates, the axle reciprocates in a linear (straight line) manner, causing a pumping action. The amount of water being pumped is determined by the distance that the axle slides in and out of the pump while it rotates. The axle is connected to a piston rod that pushes or pulls the piston in the pump. Water is pumped while the piston moves in both directions during the in and the out strokes. The further the piston moves, the greater the amount of water that is pumped.

: "The distance the piston moves varies based on the mode of operation and the Pressure/Volume (P/V) setting. The pendulum can be pushed in a gentle manner, describing a relatively low over and back succession of arcs. If compared to the face of a clock a good example would be from 4 o’clock to 8 o’clock and back again. This will produce about one half the pumped water that would result from a higher arc of 2 o’clock to 10 o’clock. If the pendulum is rotated 360 degrees or in a continuous spinning manner, it will pump the maximum amount of water for any given P/V setting.

: "There are four different P/V settings that can be selected depending on the desire of the operator. Changing from one setting to another is easy and takes only a few seconds. First, the pendulum must be stationary. Then, on top of the machine, above the Gravity Assisted Power label there is a device, which looks like a black box. Protruding from this device is a selector pin, which can be easily pulled out and removed and then inserted into another position. There are four positions to choose from and they are numbered one through four.

: "The effect of moving the selector pin from one P/V position to another is similar to shifting gears in a car. Position one produces the highest pressure and lowest volume of water. Position four produces the highest volume of water at the lowest pressure. Positions two and three are incremental changes in pressure and volume."

Product Line


for permanent installation

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Trailer Unit

for portable applications

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The technology can also be installed permanently at an existing pumping facility.


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Pumping mechanism

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Even a small kid can get some pumping action




Company: Gravitational Energy Corporation

Quoting from

The Company was incorporated in July 2007 as a private C type corporation. Mr. Bruce Feltenberger, the Company’s President and CEO, is the inventor of the Feltenberger pendulum technology, which he has assigned to the Company.

Prior to incorporating the Company, Mr. Feltenberger, Mr. Drentlau and Mr. Butrick worked for approximately three years designing, building and testing various prototypes of the Feltenberger pendulum. This unique, double-reciprocating pendulum now demonstrates how to use the force of gravity to help provide the input power to operate various types of machinery.

Inventor, CEO: Bruce Feltenberger

President, CEO, Inventor of the Feltenberger Pendulum technology.

Feltenberger brings to the Company over 40 years of experience in engineering, manufacturing and business management. He also holds patents on an inter-tidal hydroelectric system and high torque impulse turbine technology.


In the News

In the News (listing on company website)

Press Releases

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Latest: Directory:Gravity Motors > Directory:Secondary Oscillations > Directory: Feltonberger Pendulum by Gravitational Energy Corporation > Feltonberger Offers Gravity Assist to Utility Power - Gravitational Energy Corp of Ohio, USA, is developing a 100 kilowatt system that will use half as much fuel, being assisted by a swinging pendulum, which causes a vertical displacement of great force. The capital costs are a little more, but maintenance and fuel costs are much less. (PESN and BeforeItsNews February 14, 2011)

Episode 215: Pendulum Power - Gravitational Energy Corporation in Cuyahoga Falls is on the cutting edge of developing a new technology that uses a pendulum to generate gravity-assisted power. Host Jim Evans and panelists discuss the emerging technology. (Neotropolis Feb. 11, 2011)

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Latest: Directory:Emergency Preparedness / Directory:Human-Powered / Directory:Gravity Motors > Directory:Secondary Oscillations > Directory: Feltenberger Pendulum by Gravitational Energy Corporation - Gravitational Energy Corporation's Feltenberger Pendulum Pump, proven recently in Haiti, is manually operated. Coupled to a piston pump, it is capable of pumping and filtering 2,000 gallons of clean drinking water per hour. An electricity generator is being developed. (PESWiki Aug. 3, 2010)

Clean Water for Haiti - More than a dozen people drank the water today from a drainage pond at the city park in Leawood. Of course, it had been cleaned first using a gravity water filtration system donated to the ONE5 Foundation, which will send the equipment soon to Haiti, where clean water is a scarce commodity. (March 18, 2010 Video by Jim Sullinger, The Kansas City Star)

Other Coverage

Google > Feltenberger Pendulum



Gravitational Energy Corporation

P.O. Box 26242

Akron, OH 44319 USA

phone: +1-330-920-6222

email: []