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Surgical stapling apparatus with powered retraction

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TLDR
In this article, a retraction mechanism for surgical stapling is presented, which includes a motor coupled to a transmission shaft, a first gear rotatably mounted on the transmission shaft and a second gear operatively attached to the second gear.
Abstract
A surgical stapling apparatus comprises a handle assembly, an actuation shaft having a connector, and a retraction mechanism positioned within the handle assembly. The retraction mechanism includes a motor coupled to a transmission shaft, a first gear rotatably mounted on the transmission shaft, the first gear configured to engage a second gear, a clutch operatively attached to the second gear, a main shaft rotatably connected to the clutch, and a pulley coupled to the main shaft, the pulley being operatively attached to the connector. The connector and the pulley may be attached via a cable. The retraction mechanism may include a spring motor for maintaining the cable in tension. The spring motor may have a spring element wrapped around and interconnecting at least two arbors.

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TL;DR: In this article, a surgical stapling device particularly suited for endoscopic procedures is described, which includes a handle assembly and an elongated body extending distally from the handle assembly.
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References
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Patent

Surgical Stapling Apparatus

TL;DR: In this article, a surgical stapling device particularly suited for endoscopic procedures is described, which includes a handle assembly and an elongated body extending distally from the handle assembly.
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Surgical device for stapling and fastening body tissues

TL;DR: In this article, a surgical device for stapling and fastening body tissues, consisting of an insertion section extending from an operation section for insertion into a body cavity, and a stitching member connected to a distal end of the insertion section, for treating body tissues with a high-frequency current within the body cavity.
Patent

Self-contained powered surgical apparatus

TL;DR: In this article, a self-contained powered surgical stapling apparatus is provided which includes an elongate body, a fastener applying assembly including an anvil for forming a surgical fastener driven thereagainst, a motor assembly and power source for energizing the motor assembly disposed within the elongated body, and a pusher driven by the motor assembler for driving a surgeon fastener toward the anvil to be formed thereby and fastened to body tissue.
Patent

Apparatus and method for placing staples in laparoscopic or endoscopic procedures

TL;DR: In this paper, a surgical stapler for placing lateral lines of staples and making an incision, all through an endoscopic tube, includes an anvil member which is mounted to the distal end of an elongated housing.
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Expanding parallel jaw device for use with an electromechanical driver device

TL;DR: A cutting and stapling device for use as an attachment to an electromechanical device driver comprises an upper jaw and a lower jaw which separate and close against one another in a continuously parallel alignment as mentioned in this paper.
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