Vacuum cleaner with an automatic shutdown switch assembly

Abstract

A vacuum cleaner with an automatic shutdown switch assembly has a motor and a collector, a switch assembly, a float bracket and afloat assembly. The switch is mounted inside the vacuum cleaner and has a switch lever and a moveable magnet. The switch lever is connected to the electrical switch. The moveable magnet is mounted on the switch lever. The float bracket is mounted inside the collector. The float assembly is slidely mounted inside the float bracket and has a stationary magnet. The stationary magnet is mounted inside the float assembly. As liquid fills the collector, the float assembly floats, and the stationary magnet moves away from the moveable magnet. The moveable magnet and the stationary magnet do not repel each other so the switch lever moves away from and turns off the electrical switch and shuts down the motor.

1 . A vacuum cleaner with an automatic shutdown switch assembly comprising 
 a base with a switch seat;    a motor;    a collector having a reservoir with a bottom and a sidewall; and    a switch assembly mounted on the switch seat and against the motor and having 
 an electrical switch;  
 a switch lever connected pivotally to and protruding out and up from the electrical switch to close the electrical switch when the switch lever is pressed toward the electrical switch and to open the electrical switch when the switch lever pivots away from the electrical switch and having 
 a proximal end being connected pivotally to the electrical switch; and  
 a distal end; and  
 
 a moveable magnet attached to the switch lever near the distal end; and  
   a float bracket attached to the sidewall of the reservoir of the collector, being adjacent to the switch assembly and having three vertical sides defining an enclosed volume; and    a float assembly being mounted moveably in the enclosed volume between the vertical sides of the float bracket and the side wall of the reservoir of the collector, corresponding to the switch assembly and comprising 
 a float being buoyant, being mounted slidably in the float bracket against the sidewall of the reservoir of the collector and having 
 a bottom;  
 an outer wall;  
 an inner wall; and  
 a magnet bracket being formed on the outer wall, corresponding to and selectively aligning with the moveable magnet of the switch assembly and having 
 an outer end;  
 an inner end; and  
 at least one opening; and  
 
 
 a stationary magnet mounted securely in the magnet bracket of the float and aligned with the moveable magnet of the switch assembly to repel the moveable magnet of the switch assembly and close the electrical switch when the bottom of the float is on the bottom of the reservoir of the collector.  
   
   
   
       2 . The vacuum cleaner as claimed in  claim 1 , wherein 
 the float bracket further has a top panel attached securely to and protruding in from the sidewall of the reservoir of the collector above the switch assembly; and    the vertical sides of the float bracket are at least one rod mounted between the bottom of the reservoir of the collector and the top panel;    
   
   
       3 . The vacuum cleaner as claimed in  claim 1 , wherein 
 the float bracket further has a top panel attached securely to and protruding in from the sidewall of the reservoir of the collector above the switch assembly; and    the vertical sides of the float bracket are at least one panel, each vertical side having a bottom.    
   
   
       4 . The vacuum cleaner as claimed in  claim 1 , wherein the float is hollow.  
   
   
       5 . The automatic shutdown switch assembly as claimed in  claim 1 , wherein the moveable magnet is natural magnetite.  
   
   
       6 . The automatic shutdown switch assembly as claimed in  claim 1 , wherein the moveable magnet is man-made magnetite.  
   
   
       7 . The automatic shutdown switch assembly as claimed in  claim 2 , wherein the float further has a guide track formed vertically on and protruding from the inner wall of the float and slidably engaging a rod of the float bracket.  
   
   
       8 . The automatic shutdown switch assembly as claimed in  claim 2 , wherein 
 two openings are formed respectively through the inner end and the outer end of the magnet bracket; and    the stationary magnet seals the magnet bracket.    
   
   
       9 . The automatic shutdown switch assembly as claimed in  claim 2 , wherein the vertical sides are formed with three rods.  
   
   
       10 . The automatic shutdown switch assembly as claimed in  claim 3 , wherein the opening in the magnet bracket is formed through the inner end of the magnet bracket.  
   
   
       11 . The automatic shutdown switch assembly as claimed in  claim 3 , wherein the vertical sides of the float bracket are implemented with three panel to form a hollow box on the sidewall of the reservoir of the collector, and each panel has 
 a bottom; and    a cutout formed at the bottom of the panel.