The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 1990
Filed:
Feb. 21, 1990
Richard F Wulff, Maple Plain, MN (US);
Castex Industries, Inc., Holland, MI (US);
Abstract
A five in one floor cleaning machine supported on wheels intermediate the front and rear of the machine, there being adjacent the rear a clean water outlet, a scrub brush, a dirty water pickup nozzle, a clean rinse water outlet, and a dirty rinse water pickup nozzle. A pair of concentric chambers retain the clean and dirty water, the first chamber surrounding an inner chamber which is defined by a flexible spherical wall. As clean water empties from one chamber, and dirty water fills the other, the center of gravity stays substantially the same. The flexible wall of the inner chamber folds in under the force of surrounding increasing water pressure to decrease the size of the inner chamber as it empties of clean water.