We present the first results of a radial-velocity survey of cool Ap and Am stars .
HD 8441 is not only a double system with P = 106.357 days , but is a triple one , the third companion having an orbital period larger than 5000 days .
Improved orbital elements are given for the classical Ap star HD 137909 = \beta CrB by combining our radial velocities with published ones .
We yield new orbital elements of the two Am , SB2 binaries HD 43478 and HD 96391 .
Good estimates of the individual masses of the components of HD 43478 can be given thanks to the eclipses of this system , for which an approximate photometric solution is also proposed .