Patent ID: 7868565

Claim:
A method of selectively utilizing a set of linear actuator motors for an application, the method comprising: providing a plurality of linear actuator motors including at least a first linear actuator motor, a second linear actuator motor, and an Nth linear actuator motor, where N is an integer greater than 2, the plurality of linear actuator motors numbered from 1 to N including a box shaped housing with respective lengths numbered from 1 to M between a first end-plate and a second end-plate and respective hollow shafts numbered from 1 to M associated with respective power ratings, where M is an integer equal to or less than N, each of the respective hollow shafts numbered from 1 to M including an extended portion out of either the first end-plate or the second end-plate and configured to receive a nut, the nut including a tube part integrally connected with a flat-end part, the tube part being configured to fit inside each hollow shaft for holding a linear actuator, the flat-end part being exposed and attached with a sleeve surrounding the extended portion, the nut being configured to be able to mate in a common manner to any of the plurality of linear actuator motors; testing the first linear actuator motor including the nut for the application; determining whether the first linear actuator motor with a first power rating is suitable for the application; detaching the nut from the first linear actuator motor if the first power rating is not suitable for the application; reattaching the nut with a second linear actuator motor; and testing the second linear actuator motor for the application.