  A generalization of the parton-like formula is used for the first time to
find the differential distributions in the inclusive semileptonic weak decays
of the B meson. The main features of this new approach are the treatment of the
b-quark as an on-mass-shell particle and the inclusion of the effects arising
from the b-quark transverse motion in the B-meson. Using the b-quark
light-front (LF) distribution function related to the equal time momentum wave
function taken from the ACM model we compute the electron energy spectra and
the total semileptonic widths of the B meson. We find an impressive agreement
between the electron energy spectra calculated in the LF approach and the ones
obtained in the ACM model, provided the b quark mass is identified with the
average of the floating b quark mass in the ACM model. In spite of the
simplicity of the model we obtain a fair good description of the CLEO data for
V_{cb}=0.042.
