Explosive actuated pin puller
AssigneeNetworks Electronic Corp.
InventorMihai D. Patrichi
Life of this patent
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Abstract
A pin puller comprising a piston having a pull shaft extending from a cylinder in which the piston is slidable, is actuated by an explosive charge which, when ignited, develops a pressurized gas that is directed, through a transfer tube, into a chamber extending through the piston and into the piston shaft, from which it is directed outwardly through a port in the shaft into a sealed space behind the piston, to move the piston in a direction to exert a pull upon the shaft and a pull-actuated device connected thereto. The piston slidably receives the transfer tube and is sealed thereto to prevent short-circuit escape of the pressurized gas to the leading side of the piston. An electric circuit is provided for igniting the explosive charge when energized.
Claims10
An explosive actuated pin puller comprising:
- a piston having a head and a stem projecting from the back side thereof, said piston having an axial bore extending through said head and into said stem;
- a housing having a chamber in which said head is axially slidable, said stem extending through one end of said housing for axially sliding movement;
- a header closing the other end of said housing, said header defining an explosion chamber in its inner end portion;
- an explosive charge contained within said header in association with said chamber such as to deliver explosion gases thereto;
- an ignition element in igniting association with said charge;
- means for energizing said ignition element so as to ignite said explosive charge;
- and a transfer tube having one end sealed in said inner end portion of said header and its opposite end sealed in said piston bore;
- said housing having a pressure applying chamber at the back side of said piston head, and said piston stem having a port providing communication between its said bore and said chamber;
- whereby, upon explosion of said charge, the resulting gas will be directed through said transfer tube into said piston bore and thence through said port into said chamber, so as to apply its pressure to the back side of said piston head and thereby to cause the piston to be drawn into said housing.
Dependencies are inferred from the claim text.