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:
Mar. 02, 1976
Filed:
Oct. 12, 1973
Paul E Phillips, Whitehall, MI (US);
Wilfred C Nise, Spring Lake, MI (US);
Jack L Hommes, Muskegon, MI (US);
Dale E Lowder, North Muskegon, MI (US);
Clarke-Gravely Corporation, Muskegon, MI (US);
Abstract
The specification discloses a surface cleaning apparatus having a molded plastic housing and an upwardly and rearwardly projecting casing terminating at a handle, the lower portion of the housing including a forward suction nozzle, opening into a recovery chamber. Suction is generated by a blower at the rear of the recovery chamber and a shield positioned in front of the blower prevents liquid from being drawn from the recovery chamber into the blower. A pump removes liquid in the recovery chamber through a hose which empties into a remote drain. A parallel pump tubing causes recycle of liquid through the pump whenever liquid in the recovery chamber is depleted to prevent dry running of the pump. A set of spray nozzles located in the apparatus just behind the suction nozzle is connected through a hose to a faucet which acts as a remote source of clean water. The clean water supply tubing connects to the nozzles through a positive flow additive injector. The clean water supply tubing is also directly connected to the recovery tank through a bypass tubing so as to further aid in preventing dry operation of the pump and to cause additive flow even when source water pressure is low. The blower is shrouded so that air is evacuated downwardly from the blower into the surface being cleaned. A conveniently located handle switch is wired such that whenever clean water and additive are being sprayed onto the floor, the pump also operates. A separate switch enables one to run the pump only in the event the recovery tank gets too full.