Dynamically balanced walk behind trowel

Details Dynamically balanced walk behind trowel Dynamically balanced walk behind trowel

2005-12-13

2005-12-13

Hartmann, Gary S. (Department: 3671)

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

Reexamination Certificate

active

06974277

ABSTRACT:
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.

REFERENCES:
patent: 2942536 (1960-06-01), Irwin
patent: 4232980 (1980-11-01), Tertinek et al.
patent: 4320986 (1982-03-01), Morrison
patent: 4629359 (1986-12-01), Sengupta
patent: 5009547 (1991-04-01), Clark
patent: 5372452 (1994-12-01), Hodgson

Affiliated with

Also associated with

Rating

Dynamically balanced walk behind trowel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamically balanced walk behind trowel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamically balanced walk behind trowel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3513802