Special Devices, Incorporated

Power Tool Institute

Eishi Kajita

Vahan Avetisian

Andrew G Bonas

Todd Rosin

Abrar A Tirmizi

Mher Chimayan

A pyrotechnic actuator for a power cutting tool is disclosed. The pyrotechnic actuator comprises a housing defining a cavity therein, a piston positioned at least partially within the cavity, and an insert-molded unitary assembly positioned within the cavity. The unitary assembly comprises a piston engagement member and a base. A sealed void is defined intermediate the piston engagement member and the base. The unitary assembly comprises a breakable member extending intermediate the piston engagement member and the base and a pyrotechnic initiator positioned at least partially within the base. The pyrotechnic initiator, upon application of a current pulse thereto, is configured to generate a pressurized gas in the sealed void that exerts a force on the piston engagement member and breaks the breakable member thereby causing the piston engagement member and the piston to move relative to the base and the housing.

Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator

A quick-loosening mechanical linking device that includes housing, a release cavity having a predetermined height, a bolt, and an actuator. The bolt is disposed within the housing and includes an attachment means projecting out from the housing, a release zone such as an intended failure zone, and a head with a piston face. Upon actuation of the actuator, the bolt deforms and/or fails at the release zone and the attachment means moves farther out from the housing by a distance equal to the height of the release cavity. The release cavity preferably includes an abutment formed at its bottom, and the actuator is preferably an electric initiator having a pyrotechnic charge.

Quick-loosening mechanical linking device

A pyrotechnic initiator having an internal sleeve that facilitates the loading and durable retention of a pyrotechnic charge in place on the header surface within the initiator. The sleeve beneficially retains the charge either in conjunction with the upper interior surface of the charge can, or through the use of a monolithic charge and a narrowed top end of the sleeve.

Initiator with an internal sleeve retaining a pyrotechnic charge and methods of making same

A multi-unit pyrotechnic initiation system includes two or more pyrotechnic initiators molded in place into a base. Each initiator preferably includes a body overmolded around an igniter. The retainers of two or more pyrotechnic initiators may be formed together as part of a unitary substructure.

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Westlake Village, CA, United States of America

Eishi Kajita