Hydraulic vane pump
A type of positive displacement pump
You will get positive and non positive displacement pump video
https://www.youtube.com/edit?o=U&video_id=_RyMYW0agMs&ar=1580304049016
You will get hydraulic gear pump video by click on
https://www.youtube.com/edit?o=U&video_id=cY_1Zt9SVts&ar=1580304048058
