A method produces piston-type accumulators, including an accumulator housing and a separating piston, which can be displaced in a longitudinal direction inside the accumulator housing and separates two working spaces located in the housing. Particular embodiments of the present invention have the flexibility to connect with various shaped bird cages. The at least one rear leg is pivotable to stow the seat assembly in the tub. The control circuit is retained in the first and second idle state, without switching to the second and first idle state between execution of successive column selective update commands and all column update commands respectively.