English to French Tech/Engineering Patents

Dans la description d'une brosse à dents, je rencontre souvent cette formulation "while (...) it is contemplated", par ex. :

While the above-described shaft arrangement is preferred, it is contemplated that other shaft arrangements can be used with the present invention.
(...)
While it is desirable to locate the to second bristle holder directly adjacent the first bristle holder, it is contemplated that a gap may be provided between the first and second bristle holders.

Comment l'adaptez-vous en FR ? Merci.