|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||406/143; 406/144; 406/153|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 10 인용 특허 : 0|
A venturi section positioned in the flow path of pressurized air through a rock dust hopper includes an opening connected to a conduit extending to the axis of the venturi section. Concentric conduits within the venturi section direct the stream of pressurized air directly into intersecting relation with the conduit. The flow of pressurized air immediately below the conduit creates a reduced pressure to induce a continuous flow of rock dust through the venturi section opening and into mixture with the air stream which carries the entrained rock dust from...
1. Rock duster apparatus comprising, a support frame having an upper surface, a hopper for storing rock dust positioned on said support frame upper surface, said hopper having an inlet opening and an outlet opening, said inlet and outlet openings being oppositely positioned, means for supplying a preselected flow of pressurized air to said hopper, control means for controlling the means for supplying a preselected flow of air, conduit means extending from said control means through said hopper inlet opening for directing pressurized air from said...