Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1976-08-19
1980-09-09
Marbert, James B.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
B64D 1738
Patent
active
042214173
ABSTRACT:
A line release system comprising a release actuator and latch which are interposed between a line and a parachute harness and which transmit the forces on the line to the harness until the line release is accomplished. The release actuator causes the latch to release the line when a first predetermined tension is placed on the line followed by a second, lesser predetermined tension.
In a spring operated version of the release actuator, a plunger is retained by a shear pin. The plunger is subjected to tension from the line. When the first tension level is reached, the shear pin breaks and the plunger moves under tension, compressing a spring. When the tension subsequently decreases, the plunger is urged in the opposite direction by the spring, to operate a release latch which frees the line from the parachute harness.
In a pressurized gas operated version of the release actuator, a piston containing a pressurized gas capsule is retained by a shear pin. The piston is subjected to tension from the line. When the first tension level is reached, the shear pin breaks, allowing the piston to move to pierce the capsule on an anvil or stylus. When the tension on the piston decreases to the second tension level, the gas urges the piston upward to operate a pendant release latch which frees the pendant from the parachute harness.
REFERENCES:
patent: 2949330 (1960-08-01), Masser
patent: 2955867 (1960-10-01), Linthicum
patent: 3624813 (1971-11-01), Gaylord
patent: 3642236 (1972-02-01), Stanley
Hansen Henry
Marbert James B.
Sciascia R. S.
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