Patent ID: 7331484

Claim:
A fluid dispensing device including a shut off valve, a fluid flow control assembly for controlling fluid flow through the device and an actuating trigger operable to cause the shut off valve to adopt an open position in which fluid can be dispensed from the device and a closed position, a control meter which enables the volume of fluid being disposed to be measured, a latching mechanism operable to hold the shut off valve in the open position and cause the shut off valve to adopt the closed position when the predetermined volume of fluid has been dispensed, a setting mechanism operatively connected to the control meter for indicating a predetermined volume of fluid required to be dispensed and indicating when that predetermined volume has been dispensed the setting mechanism including a plurality of display wheels which can indicate the predetermined quantity of fluid to be dispensed, the display wheels being operatively connected to the control meter so that the flow of fluid through the control meter can be displayed on the display wheels, the arrangement being such that when the shut off valve is in the closed position the display wheels can be adjusted to indicate the predetermined quantity of fluid to be dispensed and when the shut off valve is opened the display wheels can indicate when the predetermined volume has been dispensed, the setting mechanism further including a plurality of setting wheels each setting wheel being associated with a respective one of the display wheels, each setting wheel being operatively connectible with the display wheel with which it is associated via a gear train, each setting wheel being mounted for movement between an engaged position and a disengaged position.