초록 ▼

A controllable volume dosing device for providing a measured dose of material. The volume dosing device comprises a cylinder having a piston movably mounted therein for movement between a first end position and a second end position, and drive device for moving the piston between the two end positio

A controllable volume dosing device for providing a measured dose of material. The volume dosing device comprises a cylinder having a piston movably mounted therein for movement between a first end position and a second end position, and drive device for moving the piston between the two end positions. A valve is provided associated with the cylinder and which is positionable in a first valve position in which material may be introduced into the cylinder and a second valve position in which material may be expelled from the cylinder. The displacement of the piston within the cylinder between the first and second end positions controls the volume of the dose of such material. An adjustable stop member associated with the piston is provided for defining the first end position of the piston. The adjustable stop member is adjustably positioned to engage a member connected to the piston to set the location of the first end position to thereby control the amount of displacement of the piston between the first and second end positions. In this way, adjustment of the volume of a dose of material to be dispensed from the cylinder may be easily and simply controlled.

대표청구항 ▼

A controllable volume dosing device comprising: a support structure; a cylinder supported by said support structure; piston means for said cylinder, said piston means including a piston mounted within said cylinder for movement between a first end position and a second end position, and a piston rod

A controllable volume dosing device comprising: a support structure; a cylinder supported by said support structure; piston means for said cylinder, said piston means including a piston mounted within said cylinder for movement between a first end position and a second end position, and a piston rod having a first end connected to said piston and a second end; a valve associated with said cylinder, said valve being positionable in a first valve position in which material may be introduced into said cylinder, and a second valve position in which material may be expelled from said cylinder, the displacement of said piston within said cylinder between said first and second end positions controlling the volume of a dose of said material; linear drive means for linearly driving said piston rod to move said piston along a piston path of movement between said first and second end positions, said linear drive means comprising a guide rod supported by said support structure and extending substantially parallel to said piston path of movement, a rack member journalled on said guide rod for linear movement therealong, a dog member carried by said rack member and engaging said second end of said piston rod, and a rotatable pinion engageable with said rack member to move said rack member along said guide rod in response to rotation of said pinion; and adjustable stop means associated with said piston means for defining said first end position of said piston, said adjustable stop means comprising a threaded member supported by said support structure and extending in a direction parallel to said piston path of movement, and a stop member threadably mounted on said threaded member so that rotation of said threaded member causes said stop member to move along said threaded member to adjust the position of said stop member, said stop member being engageable by one of said rack member and said dog member during movement thereof whereby said stop member sets the location of said first end position of said piston to thereby control the amount of displacement of said piston between said first and second end positions.