Dual blower jet assisted vacuum

Abstract

An improved vacuum cleaner wherein the hand tools have improved cleaning capacity by addition of air jets to the to the hand tools. The air jets dislodge debris and dust from inaccessible spaces to be scavenged by the vacuum stream. The jets are powered by an additional blower ( 23 ) housed in the vacuum cleaner body. The blower runs continuously and by drawing air through filter ( 19 ) boosts the vacuum power of the machine. A manual switch ( 5, 5 a, 5 b ) on the vacuum cleaner body turns control plate and control vanes ( 24, 24 a ) directing air to the jets and controlling the volume of the air flow from zero to maximum. Air is pushed through tool hose body terminus ( 2 ), hose ( 37 ), tool hose tool end terminus ( 40 ), and tool ( 46 ). Vacuum stream is drawn back through channels ( 36 ).

What is claimed is:  
     
         1 . For a typical conventional vacuum cleaner a means of generating positive pressure and delivering the resulting air stream to the working end of the hand tools comprising: 
 a. An air pressure generating element driven by an electric motor both contained in the body of said vacuum cleaner: and    b. a controlling device on the body of said vacuum cleaner for regulating the amount of air in said air stream: and    c. a conveying means to deliver said air stream to the hand tool hose terminus on the body of said vacuum cleaner: and    d. a flexible conveying means to deliver said air stream to the hand tool hose terminus at the tool end of the said hand tool hose: and    e. a connecting member at the tool end of said hand tool hose connecting to said hand tool hose and said flexible conveying means and said connecting member being hollow and having a salient edge and a means of distributing said air stream around the salient edge: and    f. a hand tool shaped to attach to said connecting member with a groove located to engage said salient edge on said connecting member and said hand tool having a plurality of internal perimeter conduits from said groove to the tip of said hand tool so that said distributed air stream from said salient edge travels from said groove through said internal perimeter conduits to said tip of said tool and said hand tool being hollow within the said internal perimeter conduits so that the vacuum air stream may pass in the opposite direction of said air stream through the center of said hand tool and center of said connecting member to said hand tool hose.    
     
     
         2 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a centrifugal type blower driven by the vacuum blower motor and has two discharge ports arrayed at an interval around the perimeter of the housing one said port discharging into the ambient atmosphere and the other said port discharging into the conveying means to the hand tool air terminus on the vacuum body and an intake fed by the air discharge from the refuse filter.  
     
     
         3 . An air jet delivering device according to  claim 2  wherein the controlling device consists of a plate free to rotate inside the air jet blower housing and said plate having two other curved plates set perpendicular to said plate and arrayed around the perimeter of said plate so that one said curved plate fully covers one said discharge port and the other said discharge port is fully open and when said plate is rotated one said curved plate begins to cover one said discharge port as the other said curved plate uncovers the other said discharge port so that when the said plate has been rotated to its extent opposite said ports are fully opened and fully closed and the rotation of said plate is controlled by a manually operated device on the vacuum cleaner body.  
     
     
         4 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a centrifugal type blower driven by the vacuum blower motor and has two discharge ports arrayed at an interval around the perimeter of the housing one said port discharging into the ambient atmosphere and the other said port discharging into the conveying means to the hand tool air terminus on the vacuum body and an intake fed by ambient air.  
     
     
         5 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a piston type compressor driven by the vacuum blower motor accompanied by an air tank and clutch activated by a manually operated device on the vacuum cleaner body and the air jet volume controlled by a manually operated device on the surface of the vacuum cleaner body.  
     
     
         6 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a piston type compressor driven by the vacuum blower motor accompanied by an air tank and clutch activated by a pressure sensing device and the air jet volume controlled by a manually operated device on the surface of the vacuum cleaner body.  
     
     
         7 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a piston type compressor driven by a separate motor accompanied by an air tank and activated by a manually operated device on the surface of the vacuum cleaner body and the air jet volume controlled by a manually operated device on the surface of the vacuum cleaner body.  
     
     
         8 . An air jet delivering device according to  claim 1  wherein the air pressure generating element is a piston type compressor driven by a separate motor accompanied by an air tank and activated by a pressure sensing device and the air jet volume controlled by a manually operated device on the surface of the vacuum cleaner body.