Pump unit

Abstract

A pump unit ( 10 ) can be carried by an operating person for the pressurized filling of inflatable filling chambers with a fluid, in particular lifting pads ( 2 ), blocking pads, tents or the like. The pump unite includes a fluid pump ( 12 ), an electric motor ( 11 ) for driving the fluid pump ( 12 ), a battery ( 13 ), a control unit ( 17 ) for controlling the operation of the fluid pump, and a connector ( 18 ) for the connection of a fluid hose ( 3 ) which leads to the filling chamber. A manually actuatable control valve ( 16 ) is positioned on the pump unit ( 10 ).

1 - 19 . (canceled) 
     
     
         20 . A pump unit is configured for manual carrying and for pressurized filling of inflatable filling chambers with compressed air, comprising:
 a fluid pump;   an electric motor for operating the fluid pump;   an accumulator;   a control unit for controlling operation of the fluid pump;   a connector for connecting a fluid hose leading to the filling chamber; and   a control valve positioned at the pump unit comprising a manifold valve;   
       wherein:
 the control valve is actuated manually actuatable; 
 the control valve is connected to the control unit via a signal line; and 
 the electric motor is controlled by actuating the control valve. 
 
     
     
         21 . The pump unit according to  claim 20 , wherein the portable pump unit comprises a housing or a support frame and the control valve is housed in or on the housing or support frame. 
     
     
         22 . The pump unit according to  claim 20 , wherein the control valve is housed in a valve block or is a component of the valve block. 
     
     
         23 . The pump unit according to  claim 22 , wherein the valve block is positioned on the fluid pump. 
     
     
         24 . The pump unit according to  claim 20 , further comprising a pressure measuring device which measures filling pressure of the inflatable filling chamber. 
     
     
         25 . The pump unit according to  claim 24 , wherein the pressure measurement device ( 24 ) is located between the connector ( 18 ) and the control valve ( 16 ). 
     
     
         26 . The pump unit according to  claim 24 , wherein the pressure measurement device is housed in the valve block. 
     
     
         27 . The pump unit according to  claim 24 , wherein the pressure measurement device comprises a display. 
     
     
         28 . The pump unit according to  claim 24 , wherein the pressure measurement device is connected to the control unit via a signal line. 
     
     
         29 . The pump unit according to  claim 20 , wherein at least two control valves are provided at the pump unit, each control valve comprising a connector for connecting a fluid hose leading to one fluid chamber each. 
     
     
         30 . The pump unit according to  claim 29 , wherein a common fluid pump is provided for the at least two control valves. 
     
     
         31 . The pump unit according to  claim 20 , wherein the control valve is a 3/3-way valve. 
     
     
         32 . The pump unit according to  claim 20 , wherein the control valve is a proportional valve. 
     
     
         33 . The pump unit according to  claim 20 , wherein a cooling fan is arranged on the fluid pump. 
     
     
         34 . The pump unit according to  claim 20 , wherein:
 the filling chamber is filled with fluid in a first operating mode;   in a second operating mode, the pressure in the filling chamber is kept at least substantially constant;   the control valve for the first operating mode transmits a first signal to the control unit;   the control valve for the second operating mode transmits a second signal to the control unit;   the control unit detects the signals and controls the electric motor in accordance with the signals.   
     
     
         35 . The pump unit according to  claim 34 , wherein the fluid is discharged from the filling chamber in a third operating mode and the control valve for the third operating mode transmits a third signal to the control unit. 
     
     
         36 . The pump unit according to  claim 20 , wherein the control unit detects a temporal change in pressure and regulates and/or switches on or off the electric motor as a function of detected temporal change in pressure. 
     
     
         37 . The pump unit according to  claim 20 , wherein the chambers comprise particular lifting pads, blocking pads, or tents.