Alan Hitchcox

Alan
L.
Hitchcox
Editor,
Penton Media Inc.

Alan became a technical editor in 1981 and joined Hydraulics & Pneumatics in 1987. After serving in the US Army as a wheeled vehicle mechanic, he graduated with a BS in engineering technology from Franklin University, Columbus, Ohio, while working as an industrial service coordinator and project manager at an industrial distributor. He has taken technical courses in fluid power and electronic and digital control at the Milwaukee School of Engineering and the University of Wisconsin - Milwaukee and has served on several industry committees.

Articles
Bosch Rexroth set to sell pneumatics group
Bosch Rexroth announced that company officials have signed an agreement to sell its global pneumatics business to Triton Advisers Ltd., a European investment group.
Weight balancing conserves power
Weight balancing conserves power
Aluminum lightens bent-axis pump
Aluminum lightens bent-axis pump
Cat makes a big impact with its hybrid excavator
Hydraulics technology wins out over electric for hybrid drives in large excavators.
Brennan Adds Pressure Ratings To Mobile App

Brennan Industries (www.brennaninc.com) recently expanded its mobile application, which now includes pressure ratings for more than 6,000 of the firm’s parts spanning 330-plus series. As part of the upgrade, the app includes pressure ratings in psi or bar units for numerous Brennan products, in addition to the ability for users to search for ratings by series or part number.

A pneumatic locomotive?

Pneumatics is often used where the potential dangers of electricity pose too great a risk for electrical power to be used. Equipment used in mines and submerged or standing in water are probably the most prevalent applications.

IFPE paper: how to make lemonade from lemons

Any form of power transmission has its advantages and disadvantages. I don’t have the space to elaborate here, but one of the knocks against hydraulics is pressure ripple. Pressure ripple is a fluctuation of pressure in a hydraulic system. Instead of putting out a constant flow of fluid, hydraulic pumps emit flow in surges. The frequency of surges is a function of the number of pumping chambers (cylinders, gear teeth, vanes, etc.) and the pump’s speed, whereas the severity (peak-to-peak magnitude) of the surges is a function of the pump’s design.

Eaton Hydraulics names Price Engineering as first Certified Cylinder Service Center
Price Engineering, Hartland, Wis., becomes the first Eaton Certified Cylinder Service Center.
Forget what you know about gear pumps

Most of us are well acquainted with gears, especially when it comes to gear pumps. Gear pumps typically use gears with teeth similar in geometry to those used for power transmission: they are symmetrical. Symmetrical teeth are needed because gear sets used in mechanical power transmission often rotate clockwise and counterclockwise.

Electronic pressure switch
TDEPS electronic pressure switch with relay output uses redundant half-bridge circuitry for high-shock/high-vibration environments. sensing elements, if one fails, the switch continues to operate on the remaining elements.
Proportional valves take a pounding

Motion, force, and positioning accuracy of servovalves has been legendary for decades, and today’s proportional valves provide performance equally as impressive such that the distinction between proportional valves and servovalves cannot be defined by valve construction.

Still, both types of valves must use sensitive feedback systems to achieve their impressive performance. Sensitive usually means fragile, so applications involving impact, heavy shock, and vibration, means valves must be isolated from the hostile environment.

Small asphalt roller packs a big punch

The CASE line of small double-drum asphalt rollers is ideal for parking lots, bike paths, tennis courts, and other small-to medium-size projects. CASE engineers designed each of four sizes (DV23, DV26, DV36, and DV45) to deliver the same level of productivity as its larger models, while helping to boost efficiency on jobs where space is tight, so maneuverability is paramount.

Lubecoach shortens lubrication process

Calculations are central to precise lubrication practices, and to that end, Advanced Machine Reliability Resources Inc., Franklin, Tenn., has developed LubeCoach, an intuitive and low-cost device that can help assign the correct lubrication volume and frequency for grease-lubricated element bearings.

Pump-Controlled Steering System Shows High Efficiency

Modern on-road vehicles have been making steady strides when it comes to employing technological advances featuring active safety systems. However, similar technology for off-highway machines has lagged behind.

Seal Manufacturer Expands Facilities

A strong growth pattern over the last three years is the catalyst behind the 13,140-sq-ft addition to T-Lon Products Inc., Hartland, Wis., existing 40,000-sq-ft facility. MSI General Corp., Oconomowoc, Wis., will design, engineer, and construct the addition. The additional space will allow T-Lon Products to accommodate the growth and anticipated future contracts.

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