Patent ID: 7887401

Claim:
Ventilation valve ( 2 ) for a heater ( 1 ) or heating installation, comprising a holding body ( 4 ) that can be mounted in an opening or threaded opening ( 3 ) of the heater ( 1 ) or the heating installation and a valve body ( 5 ), which is adjustable axially in the holding body ( 4 ), which closes a ventilation passage or ventilation channel ( 6 ) in a first position, and which opens the channel after axial displacement, wherein the ventilation channel ( 6 ) has one of a diagonal or angled or curved course deviating from an axial orientation and has an inlet ( 7 ), which is located in an interior of the heater ( 1 ) in a position of use and which is arranged higher than an outer outlet ( 8 ) thereof, wherein the ventilation channel ( 6 ) is arranged at least partially or completely in the valve body ( 5 ), the valve body ( 5 ) is adjustable or displaceable axially for opening the channel relative to the holding body ( 4 ) against a restoring force, via which the inlet ( 7 ) of the ventilation channel ( 6 ) is biased into the closed position within the holding body ( 4 ) and after axial displacement is moved out from the holding body to the interior of the heater ( 1 ) or the heating installation while a periphery of the valve body remains sealed against an inner periphery of the holding body, and the valve body ( 5 ) and the holding body ( 4 ) can be adjusted relative to each other in a rotational direction, and the valve body ( 5 ) is axially displaceable for venting by being axially pressed from the first, closed position into the holding body ( 4 ) against the restoring force to an open position, and upon release, the restoring force alone returns the valve body to the first, closed position.