Activation arrangement with safety lock-out for tissue sampling

Surgery – Truss – Pad

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128749, A61B 1000

Patent

active

055514421

ABSTRACT:
An actuator device for propulsion of a needle assembly particularly employed for tissue sampling procedures includes a movable drive structure for propelling tissue sampling displacement of the needle assembly and a cocking structure arranged to reverse the displacement of the drive structure after the needle propulsion. A trigger structure in the actuator device cooperates with the drive structure to selectively activate the needle propulsion, and the trigger structure comprises a retention mechanism for releasably restraining the propulsion. The trigger structure also includes safety lock structure which releasably locks the activation restraint by the retention mechanism, and the cocking structure has release structure for unlocking the restraint by the retention mechanism to selectively allow operation of the trigger structure to activate propulsion by the drive structure.

REFERENCES:
patent: 3989033 (1976-11-01), Halpern et al.
patent: 4600014 (1986-07-01), Beraha
patent: 4766907 (1988-08-01), De Groot et al.
patent: 4958625 (1990-09-01), Bates et al.
patent: 5121751 (1992-06-01), Panalletta
patent: 5284156 (1994-02-01), Schramm et al.

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