Patent ID: 9228755
Filing Date: 2016-01-05
CPC Classification: B01D,F24F

Claim Text:
1. A vent and cover plate assembly for a dust-free workshop floor, comprising a plurality of vents arranged on the dust-free workshop floor and cover plates that are each associated with a corresponding vent, wherein the vents each include a hole and clamping slots arranged at an outer periphery of the hole, and the cover plates each include a cover body and clamping feet arranged at an outer periphery of the cover body, wherein the cover body engages with the hole, and the clamping feet engage with respective clamping slots, wherein a retaining groove is arranged in the middle of the clamping slot and a projection which can fit into the groove is arranged on a mounting surface of the clamping foot, so that the engagement of the retaining groove and the projection during mounting can restrict the circumferential rotation of the cover plate, and wherein the projection has a thickness smaller than the depth of the retaining groove.