SMA-based Pin Puller/Pusher
- General Description
- Technical Advantages
SMA-based Pin Puller (SPPL Series) consists of a spring-loaded shaft that is restrained by a latch mechanism and triggered by Nitinol shape memory alloy (SMA) wires. The Pin Puller offers both high load capability (180~700N) and fast actuation time (~50ms).
Our Pin Puller uses a conventional ball-lock mechanism with redundant SMA wires as triggers. The SMA trigger allows for a fast response with very low shock generation. Redundant switches are incorporated into the device to give “ON” or “OFF” signals when the Pin Puller is released or armed, simplifying ground operations and flight control requirements. The Pin Puller can also be easily reset within seconds by manually moving the pin back into the extended position via a simple tool provided by our company.
Our Pin Pusher is quite similar to the Pin Puller. The difference is that the compressed spring is used in the Pin Puller to pull the pin inward while in the Pin Pusher to push the pin outward.
Key features of SPPL/SPPS series pin puller/pusher are as follows：
Low shock
Millisecond release
Easily reset without refurbishment
Redundant, resettable SMA triggers
Near simultaneous release of multiple hold-down points
Low mass
Space-qualified parts and materials
Custom configurations available under request
Electrical compatibility with pyro-activation circuits
Redundant switches are incorporated for simple control
1 Larger pull force up to 700N is available for customer request;
2 The pulling force decreases linearly during the pulling process;
3 Pull stroke can be adjusted to fulfill specific requirements of customers;
4 Release time is dependent on actuation current;
5 Resistance can be raised to compatible with higher bus voltages;
6 Mass includes 4X0.3m AWG 22# lead wires.
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