Patent ID: 8746658

Claim:
A coaxial valve for regulating and blocking a liquid or gaseous medium comprising: a valve housing having at least one inlet opening, at least one outlet opening and a flow duct connecting the at least one inlet opening to the at least one outlet opening; a tubular valve sleeve disposed in an axially movable manner in a portion of the flow duct and having an inflow and an outflow opening for the medium, wherein the inflow and the outflow openings open into the flow duct; a closure member disposed in the valve housing and arranged coaxially with the valve sleeve and configured to close the inflow opening; and a drive configured to axially move the valve sleeve and having an electric servomotor and a transmission part coupled between the servomotor and the valve sleeve, the transmission part configured to transmit an axial movement to the valve sleeve and including: a drive sleeve disposed coaxially with the valve sleeve and having a driver disposed on the drive sleeve and engageable with the valve sleeve so as to move the valve sleeve in a first direction; and a spring assembly disposed coaxially with the valve sleeve, the spring assembly acting in the axial direction and supported on the drive sleeve and on the valve sleeve in order to move the valve sleeve in a second direction opposite the first direction so as to maintain a sealing force.