公开(公告)号：US5150742A

公开(公告)日：1992-09-29

申请号：US707908

申请日：1991-05-30

Applicant: Toshiaki Motohashi ,  Yooichi Harada ,  Tsuyoshi Yanagihara

Inventor： Toshiaki Motohashi ,  Yooichi Harada ,  Tsuyoshi Yanagihara

IPC: B67D7/54 ,  B67D7/04 ,  B67D7/76 ,  F04C18/18 ,  F04C23/02 ,  F04D25/04 ,  G01F3/10

CPC classification number: B67D7/0482 ,  G01F3/10

Abstract: A device for recovering vapor in a vehicle fuel tank has a hydraulic motor arranged in the way of a liquid duct for feeding volatile liquid from a fuel reservoir tank to a gun nozzle mounted at the free end of the liquid duct, and a pneumatic pump arranged in the way of a vapor duct for feeding the vapor in the vehicle fuel tank through the gun nozzle to the fuel reservoir tank. The hydraulic motor and the pneumatic pump have a pair of meshing rotors, respectively. One pair of rotors are of substantially same configuration and size with those of the other pair of rotors. The rotors of the pneumatic pump are driven by the hydraulic motor rotors through multiplying gearings.