Wacker Corporation

Wacker Neuson Production Americas LLC

Phoenix Products Company, Inc.

Wacker Neuson Corporation

Richard D Goldberg

Todd J Lutz

Darrin W Dauffenbach

Gregory Kruepke

Rupert O Yantz

Timothy J Lickel

In a riding concrete finishing trowel, a stabilizer is operatively disposed between the frame and either the gearbox or a structure that is coupled to the gearbox so as reduce the effects of rotor assembly vibration on the trowel. In one embodiment, the stabilizer takes the form of a gas spring located between the frame and the pitch control post. The stabilizer may be located relatively close to the top of the pitch control post so as to take advantage of the mechanical advantage offered by the spacing between that location and the gearbox.

Riding concrete trowel with stabilizers

A portable vibratory screed includes a blade that is connected to a handle constructed to be manipulated by an operator. Nodes of minimum vibrational amplitude are formed at specific locations along the length of the blade when the exciter is driven at a rated operating speed. A site level and/or the handle is attached to the blade at or in the vicinity of one or more of these nodes, therefore, is relatively isolated from induced vibrations.

Portable vibratory screed with bubble vial inclination indication system

A method is provided of making and using a walk behind rotary trowel that is 'dynamically balanced' so as to minimize the forces/torque that the operator must endure to control and guide the trowel. Characteristics that are accounted for by this method include, but are not limited to, friction, engine torque, machine center of gravity, and guide handle position. As a result, dynamic balancing and consequent force/torque reduction were found to result when the machine's center of gravity was shifted substantially relative to a typical machine's center of gravity. Dynamic balancing can be achieved most practically by reversing the orientation of the engine relative to the guide handle assembly when compared to traditional walk behind rotary trowels and shifting the engine as far as practical to the right. This shifting has been found to reduce the operational forces and torque the operator must endure by at least 50% when compared to traditional machines.

Method of making and using a dynamically balanced walk behind trowel

A walk behind rotary trowel is configured to be 'dynamically balanced' so as to minimize the forces/torque that the operator must endure to control and guide the trowel. Characteristics that are accounted for by this design include, but are not limited to, friction, engine torque, machine center of gravity, and guide handle position. As a result, dynamic balancing and consequent force/torque reduction were found to result when the machine's center of gravity was shifted substantially relative to a typical machine's center of gravity. Dynamic balancing can be achieved most practically by reversing the orientation of the engine relative to the guide handle assembly when compared to traditional walk behind rotary trowels and shifting the engine as far as practical to the right. This shifting has been found to reduce the operational forces and torque the operator must endure by at least 50% when compared to traditional machines.

Dynamically balanced walk behind trowel

A spotlight assembly is disclosed, including a spotlight energizeable to transmit a beam of light and having a lens frame configured to support a lens, and a cylinder coupled to the lens frame and adapted to receive at least one light guide through an opening in a sidewall of the cylinder. An extender for a spotlight configured to generate a beam of light is also disclosed, the spotlight having a first shell to support a reflector and a lamp and a light emitting opening, and a second shell for enclosing the opening, wherein the second shell has a transparent window through which the light beam is transmitted out of the first shell, the extender including a first shell configured to receive and support a plurality of light guides to be spaced along the light beam inside the first shell, and a mounting bracket affixed to the first shell and couplable to an outer surface of the transparent window, wherein the first shell has at least one opening disposed to receive at least one of said plurality of light guides for insertion into the first shell in a direction substantially perpendicular to the axis of the light beam.

Growing community of inventors

Hartford, WI, United States of America

Richard D Goldberg