Vacuum spray head
Patent 4521935 Issued on June 11, 1985. Estimated Expiration Date: 
August 29, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 29, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3705437 3747155 3774262 3828390 3871051 Cleaning head Device for cleaning floors by means of a liquid Patent #: 4200952 InventorsAssigneeApplicationNo. 06/527256 filed on 08/29/1983US Classes:15/322NozzlesExaminersPrimary: Moore, Chris K.International ClassesA47L 11/00 (20060101)A47L 11/34 (20060101) E01H 1/00 (20060101) E01H 1/10 (20060101) AbstractA combination vacuum and spray head for a pressurized cleaning apparatus adapted especially for use upon open grating. The structure includes a vacuum head housing, a shielded spray head that provides a plurality of downwardly, diagonally directed spray nozzles for directing a stream of fluid against the opposite sides of parallelly extending grate slats.Field of SearchManipulatable nozzle with flexible conduit connection to portable power and/or material supply unit, e.g., window washerNozzles With work-contacting carriage or mount, and relatively adjustable nozzle With flexible conduit connection between ambulant air draft applying means and relatively stationary air pump or supply | |
