US Patent 8631767 Livestock grooming

An apparatus and associated method for a livestock grooming device having a first canister containing a first blower that selectively imparts an airflow through an outlet of the first canister, and further having a second canister containing a second blower that selectively imparts another airflow through an outlet of the second canister. A manifold fluidly connects both outlets to a manifold outlet. A backflow preventer device between the second blower and the manifold outlet selectively prevents the airflow from the first canister from entering the outlet of the second canister.