Door actuator for opening and/or closing a door
AssigneeDormakaba Deutschland GmbH
InventorsAlexander Hellwig, Thomas Salutzki, Sabine Weimann
Life of this patent
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Abstract
A door actuator for opening and/or closing a door, includes a fluid housing with an inner compartment, which is filled with fluid, in particular hydraulic oil, a fluid housing opening in the fluid housing for draining the fluid at thermal overload, a thermally activatable valve for opening, which closes the fluid housing opening, and a collecting device, which is disposed outside the fluid housing opposite the fluid housing opening, forms a collecting space for the fluid, is open towards the fluid housing opening, and includes at least one drain opening for draining the fluid from the collecting space.
Claims15
A door actuator for opening and/or closing a door, the door actuator comprising:
- a fluid housing with an inner compartment, which is filled with fluid,
- a fluid housing opening in the fluid housing for draining the fluid at thermal overload,
- a thermally activatable valve located in said fluid housing opening and being configured to close the fluid housing opening,
- and a collecting device, disposed outside the fluid housing opposite the fluid housing opening, forms a collecting space for the fluid, is open towards the fluid housing opening, and includes at least one drain opening located on a side of the collecting device and being configured for draining the fluid from the collecting space.
Dependencies are inferred from the claim text.