Sanofi

Timothy Robin Quigg

Stefan Blancke

Mark Digby Teucher

Stephen Francis Gilmore

James Robert Coop

James Anthony West

Daniel David Higgins

Ralph Donald Quentin Collings

Jack Carroll

Sophie Louise Sladen

Laura Stein

A drive mechanism for a drug delivery device with a reduced operating loudness includes a dose selector, a housing, and a ratchet with a gear element comprising a plurality of gear teeth connected with the dose selector and a pawl element rotationally constrained to the housing comprising at least one pawl tooth. The at least one pawl tooth engages with the gear teeth and is located opposite to the gear teeth. One of the gear element and the pawl element moves forth and back relative to the other element of the gear and pawl elements along a first direction for de-engagement and re-engagement of the opposite gear teeth and at least one pawl tooth when the gear element rotates relative to the housing during dose setting using the dose selector. The pawl element and/or gear element comprises a noise reduction characteristic at a surface which dampens the noise produced.

Drive mechanism with noise reduction

Growing community of inventors

Bristol, United Kingdom

Timothy Robin Quigg