GEAR FEED PUMP Russian patent published in 2006 - IPC F04C2/08 

FIELD: mechanical engineering; pumps.

SUBSTANCE: proposed pump has housing 10, 12 with working chamber which accommodates pair of meshed gears 16, 18 set into rotation and delivering handled medium from suction space 44 connected with service reservoir into delivery space 46 along delivery channels 48 formed by spaces between side surfaces of gears 16, 18 and walls of pump working chamber around the gears. Drive shaft 30 is provided which is connected through coupling member 40 arranged in its mounting space 41 in housing 10, 12 with one of gears 16 with geometric closing to provided transmission of rotation to gear. Space 41 accommodating coupling member communicates with delivery space 46 through connecting channel 54, 56 provided with delivery valve 60 which opens said connecting channel only after pressure rise in delivery space 46 to preset value of opening pressure of delivery valve.

EFFECT: reduced wear of coupling member.

6 cl, 3 dwg