- AN OVAL GEAR SET FOR USE IN A FLOW METER A HAND-HELD FLOW METERING DEVICE AND A METHOD FOR PRODUCING INVOLUTE GEAR TEETH

摘要

flow meter 28 for the oval gear set 46, and all equal to each other includes first and second gear at an angle (46A, 46B) is engaged with the first and second gear disposed to engage in the distance CD between center fixed (46A, 46B). The oval gear 46 of each gear set comprises a hub and a plurality of gear teeth (95). The hub is the center of the hub (100A, 100B) extending out of the oval body having a major axis and a minor axis through (99A, 99B), and surrounding a major axis and a minor axis comprises a root profile wall RP (root profile wall). The plurality of gear teeth (95) is laid out from the root profile wall RP. Each of said gear teeth (95) includes a pair of contact surfaces having a circular profile in the swirl cuff (IC1, IC2).