Publications by Charles Baur | EPFL Graph Search

Shape memory alloy mechanical actuator with reduced commutation time

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Marjan Ghorbani

Using shape memory alloys (SMAs) as actuators offers several advantages, including high power density, large stroke capabilities, and friction elimination. These attributes make SMAs suitable for actuating flexure-based mechanisms in a wide array of extrem ...

2024

Article of orthopedic footwear

Charles Baur, Julien Favre, Brigitte Jolles-Haeberli, José Luis Rivera Gutiérrez

The present invention relates to an article of orthopedic footwear comprising a sole. The sole comprises an outsole, an insole comprising a support layer for supporting the foot of a user, the support layer possibly comprising a rigid plate and having a lo ...

2024

Fully compliant snap-through bistable gripper mechanism based on a pinned-pinned buckled beam

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette

This paper presents a new planar flexure-based bistable two-jaw parallel gripper mechanism. The bistability of the mechanism is enabled by a pinned-pinned buckled beam suspended onto two cross-spring pivots. External energy is required only during the swit ...

2024

High-precision flexure-based XY-stage with high stiffness and load capacity

Simon Nessim Henein, Charles Baur, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger

Typical flexure-based XY-stages have a serial design, and their layout results in the flexures being loaded in flection in face of heavy payloads or vertical loads. This paper presents a design with zero parasitic shift in which all flexures are loaded in ...

2024

Flexure-based planar xy transition table

Charles Baur, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger

Flexure mechanism (1) comprising:- an end effector (3) arranged to be able to move in a first plane (XY);- an intermediate stage (7) linked to said end effector (3) by means of at least three first beams (5) extending substantially perpendicular to said fi ...

2022

Rectilinear translation four-bar flexure mechanism based on four Remote Center Compliance pivots

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans, Quentin Gubler

This paper presents a novel planar four-bar linkage compliant mechanism (called 4-RCC) based on four flexure-based Remote Center of Compliance (RCC) pivots. With particular configurations and dimensions, the beam shortening of the RCC pivots can compensate ...

euspen2022

Detection mechanism for a medical sensing tool, medical sensing tool

Charles Baur, Loïc Benoît Tissot-Daguette, Hubert Pierre-Marie Benoît Schneegans

A micromachined mechanism (5) for a sensing tool (1), the mechanism comprising a support, a probe, pivotally mounted with respect to the support, a beam (10) connected to the support (8), and the probe, the probe (9) being intended to apply a load (Ftool) ...

2022

A load cell with adjustable stiffness and zero offset tuning dedicated to electrical micro- and nanoprobing

Simon Nessim Henein, Charles Baur, Loïc Benoît Tissot-Daguette, Etienne Frédéric Gabriel Thalmann, Michal Stanislaw Smreczak

The tasks of electrical micro- and nanoprobing require precision that goes beyond human perception and therefore, depend on sensors providing real-time feedback. Efforts towards automation in micro- and nanoprobing and emerging areas such as branched nanow ...

2022

Flexible surgical device with controllable stiffness

Charles Baur, Lennart Rubbert

The invention relates to a surgical device (10), comprising a tubular outer shaft (12,) and an inner element (14) having an elongated shape, the outer shaft comprising a distal (30a) and a proximal (30b) outer hinges, the inner element comprising an inner ...

2022

Active load cell with positive, negative and zero stiffness operating modes for micronewton range contact force monitoring in electrical probing

Simon Nessim Henein, Charles Baur, Hubert Pierre-Marie Benoît Schneegans, Michal Stanislaw Smreczak

This article describes a novel method for applying a contact force in the range of 1 to 100 μN with pointed probe on a microscale sample in order to perform ohmic electrical measurements. The solution is based on the new TIVOT active load cell combining th ...

2022