초록 ▼

A release mechanism for opening a valve of a fire extinguishing installation by means of a linearly movable release element, such as a release plunger or release pin upon releasing a pre-stressed helical spring. At one end of the helical spring there is arranged a movable ball pressure plate. Betwee

A release mechanism for opening a valve of a fire extinguishing installation by means of a linearly movable release element, such as a release plunger or release pin upon releasing a pre-stressed helical spring. At one end of the helical spring there is arranged a movable ball pressure plate. Between this ball pressure plate and a further fixedly arranged ball plate there are arranged balls or spherical elements. A loading pin provided at the movable ball pressure plate retains the helical spring under torsional stress and the movable ball pressure plate in such an angular position that the balls of both ball pressure plates can be retained at a starting distance. Upon electromagnetic release of the loading pin and return rotation of the helical spring the movable ball pressure plate rotates such that the spring can be axially relaxed or load-relieved and the release plunger or the like presses upon the release element of the valve and opens the latter. Concentrically arranged with respect to the helical spring is a further release element which can be manually actuated by a manually operated-release or actuator member, such as a release knob, independent of the electromagnetic release operation. The operating state of the release mechanism can be monitored visually and by microswitches.

대표청구항 ▼

A release mechanism for a valve of a fire extinguishing installation having a linearly movable element which, upon release of a pre-biased spring, moves out of a rest position and actuates the valve, comprising: two cooperating mutually spaced ball pressure plates; a spring defining said pre-biased

A release mechanism for a valve of a fire extinguishing installation having a linearly movable element which, upon release of a pre-biased spring, moves out of a rest position and actuates the valve, comprising: two cooperating mutually spaced ball pressure plates; a spring defining said pre-biased spring cooperating with said ball pressure plates; a plurality of balls arranged between said ball pressure plates for maintaining said ball pressure plates in spaced relationship from one another and for biasing said spring; each of said ball pressure plates have recesses for receiving said balls; said ball pressure plates being rotatable relative to one another so that said balls latch into said recesses of the ball pressure plates and enable the spring to at least partially relax; said spring comprising a helical spring which in its biased state is loaded both in axial compression and in torsion; one of said ball pressure plates defining a movable ball pressure plate; a loading pin connected with said movable ball pressure plate; an electromagnetically actuatable release catch means cooperating with said loading pin; and said loading pin, upon rotation of said movable ball pressure plate, latching at said electromagnetically actuatable release catch means in order to load said helical spring.