Herman Miller, Inc.

Tennant Company

Jeffrey R Oberlin

Douglas M VanDeRiet

Jeff Weber

Douglas M Van De Riet

Todd D Krupiczewicz

Jason W Carpenter

Paul M Pierce

Frederick A Hekman

Frederick A Heckman

An apparatus and method for minimizing the accumulation of soil and debris within a vacuum system of a surface maintenance machine is disclosed. A secondary fluid, such as pressurized cleaning solution, is sprayed into the vacuum system in order to reduce soil and debris accumulation within the vacuum system without applying additional fluid to a floor surface. In one embodiment of the invention, pressurized fluid is introduced directly into the vacuum extractor tool of a surface cleaning machine in order to dislodge accumulated debris on surfaces therein. A method of minimizing the accumulation of soil and debris within the vacuum system is also disclosed. The invention is applicable to a variety of portable and vehicle-based floor cleaning machines.

Secondary introduction of fluid into vacuum system

A modular arm rest system for a chair. The arm rest includes a connecting member that is installed into an interior cavity in the chair frame and is retained by a nose. A back is also provided with an arm rest hole that the connecting member can be installed through, thereby securing the back to the chair frame. The modular system includes a reclining chair and a four-legged stacker chair with arm rests and plugs so that the chairs can be reconfigured as desired by the user.

Office chair

A method of installing a spring into a chair and a chair with a preload member that prevents a user from removing an initial stress from the spring. The method includes positioning a spring guide in a first position and installing the spring into the chair in an unstressed state. The spring is then stressed by adjusting the spring guide away from the first position. When the spring has been stressed to at least the desired initial stress, the preload member is positioned to prevent the spring guide from being adjusted back to the first position.

Chair

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Fruitport, MI, United States of America

Jeffrey R Oberlin