Metal hydride actuation device
A self-recocking actuation device is disclosed. One possible use for it is in conjunction with a pneumatic fire protection system. This invention employs the process known as occlusion to store large amounts of gas in a small volume. Metal hydrides in a chamber are used to store hydrogen in the disclosed preferred embodiment. Upon the application of heat-from a heat source like a resistance heater-the charged metal hydride releases its hydrogen (H/sub 2/) in a chamber having only one exit opening which empties into a sealed bellows. This bellows contacts a piston located in another chamber wherein a biased resetting spring is provided to normally maintain the piston in contact with the bellows. As the pressure from the H/sub 2/ gas builds up, it overcomes the biased spring to move it and the piston along with an associated pin or other actuator. If used to actuate a pneumatic fire protection system, the pin or actuator at the downward side of its stroke in turn, may puncture a shearable diaphragm or in some other way releases the contents of a container containing a second gas, like nitrogen (N/sub 2/), which is then released from a second exit port in a different chamber to charge the fire protection system. Recocking of the piston begins as the heating of the metal hydride ceases. As cooling takes place the hydrogen is absorbed to reenter the hydride to decrease the gas pressure supplied. The piston's biased resetting spring then recocks the piston to its original position.
- Assignee:
- Secretary of Interior
- Patent Number(s):
- US 4282931
- OSTI ID:
- 6005165
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420202* -- Engineering-- Protective Structures & Equipment
ACTUATORS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BELLOWS
CALCIUM COMPOUNDS
CALCIUM HYDRIDES
CLATHRATES
CONTROL EQUIPMENT
ELEMENTS
EQUIPMENT
FIRE EXTINGUISHERS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
MACHINE PARTS
MECHANICAL STRUCTURES
NICKEL COMPOUNDS
NICKEL HYDRIDES
NITROGEN
NONMETALS
PISTONS
PNEUMATIC CONTROLLERS
SPRINGS
TRANSITION ELEMENT COMPOUNDS