You don't need to indicate the model, just the motor.
2. Need to choose a certain type of water pump, but there is a mistake in selection, which makes the patent infeasible and the buyer unable to put into production. What should I do?
This problem is less likely to happen in practice, because in practice, you transfer or license this patent to the other party. Generally speaking, the transferee or licensee needs you to give specific guidance to the production line or provide relevant parameters necessary for production (which will be indicated in the signing of the transfer or license contract).
If this happens, you can only do technical guidance.
3. Can the manufacturer put into production according to your patent specification, or do you need to make your own production process, type selection and standard parts before you can put them into practical application?
In the application process, as long as it is a complete technical scheme, the utility model patent can be authorized. So if your technology involves complex mechanical structure, you need to guide the production line or provide relevant parameters necessary for production, so that the other party can implement it as soon as possible.
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