Browse Prior Art Database

Alternate Mechanisms to Power the Firing of a Surgical Stapler (Non-Variable Mechanical Advantage)

IP.com Disclosure Number: IPCOM000232329D
Publication Date: 2013-Nov-01
Document File: 5 page(s) / 578K

Publishing Venue

The IP.com Prior Art Database

Abstract

These ideas embody alternate mechanisms to transfer rotational motion to linear translational motion without varying mechanical advantages throughout the stroke of the circular stapler device. The current circular stapler lines are fully manual devices requiring the user to both manually open and close the anvil via rotation of the adjusting knob as well as squeezing the firing trigger. These ideas will lower the force to fire, which may result in a more consistent firing stroke.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 70% of the total text.

Page 01 of 5

Alternate Mechanisms to Power the Firing of a Surgical Stapler (Non-Variable Mechanical Advantage)

Summary/Background

These ideas embody alternate mechanisms to transfer rotational motion to linear translational motion without varying mechanical advantages throughout the stroke of the circular stapler device. The current circular stapler lines are fully manual devices requiring the user to both manually open and close the anvil via rotation of the adjusting knob as well as squeezing the firing trigger. These ideas will lower the force to fire, which may result in a more consistent firing stroke.

Description

Alternate mechanisms to power the device firing stroke.

The first idea, Figures 1 and 2, uses a lead screw design such that the output shaft of the motor has threads similar to a screw and it rotates as the motor spins. There is then a nut with internal mating threads that is constrained such that it cannot rotate but only translate along the spinning screw shaft. The nut then forces a lever arm that is pinned at one end to pivot and push against the firing elements to fire the device. The second idea, Figure 3, is a lead screw design such that a nut with internal threads is engaged with a screw with external threads. The nut is constrained to only rotate via engagement with the motor. When the nut rotates, the screw which is constrained to not rotate will translate forward pushing the firing elements. The third idea, Figure 4, is a worm gear mechanism wherei...