Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
201 words
An automatic powder feeding apparatus including a sensor nozzle for blowing a carrier fluid into an inlet of a detector tubular passageway having an inlet and an outlet, means for detecting a pressure difference between an inlet side pressure detecting port provided upstream of the outlet of said sensor nozzle and an outlet side pressure detecting port provided at the outlet of said detector tubular passageway, means for shunting a part of said carrier fluid to said inlet side pressure detecting port and regulating a pressure at the outlet of the detector tubular passageway, means for regulating a pressure at the inlet of the detector tubular passageway, said means for regulating a pressure at the outlet of the detector tubular passageway being an injector connected via a valve to said outlet of the detector tubular passageway, and an automatic control valve having said pressure difference applied as its input and a flow rate of a driving fluid of said injector issued as its control output and including means for presetting a set value corresponding to said pressure difference; characterized in that said automatic control valve and said output side pressure detecting port are connected to each other via a three-way valve.
Claim 2
Dependent Claim
201 words
An automatic powder feeding apparatus including a sensor nozzle for blowing a carrier fluid into an inlet of a detector tubular passageway having an inlet and an outlet, means for detecting a pressure difference between an inlet side pressure detecting port provided upstream of the outlet of said sensor nozzle and an outlet side pressure detecting port provided at the outlet of said detector tubular passageway, means for shunting a part of said carrier fluid to said inlet side pressure detecting port and regulating a pressure at the outlet of the detector tubular passageway, means for regulating a pressure at the inlet of the detector tubular passageway, said means for regulating a pressure at the outlet of the detector tubular passageway being an injector connected via a valve to said outlet of the detector tubular passageway, and an automatic control valve having said pressure difference applied as its input and a flow rate of a driving fluid of said injector issued as its control output and including means for presetting a set value corresponding to said pressure difference; characterized in that said automatic control valve and said output side pressure detecting port are connected to each other via a three-way valve.
Claim 3
Dependent Claim
38 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that the three-way valve connected to the automatic control valve and the outlet side pressure detecting port has the other connecting port communicated with the atmosphere.
Claim 4
Dependent Claim
41 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that the three-way valve connected to the automatic control valve and the outlet side pressure detecting port has the other connecting port communicated via a valve with the atmosphere.
Claim 5
Dependent Claim
33 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that the inlet side pressure detecting port and the just behind of flow rate measuring means are communicated with each other.
Claim 6
Dependent Claim
62 words
An automatic powder feeding apparatus as claimed in Claim 1 or 4, characterized in that said apparatus comprises means for regulating a pressure at the outlet of the detector tubular passageway in which the inlet side pressure detecting port and flow rate measuring means are communicated with each other and/or means for regulating a pressure at the inlet of'the detector tubular passageway.
Claim 7
Dependent Claim
38 words
An automatic powder feeding apparatus as claimed in Claim 5, characterized in that the means for regulating a pressure at the outlet of the detector tubular passageway is an injector consisting of a throat and a driving nozzle.
Claim 8
Dependent Claim
37 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that means for introducing powder is a tubular passageway in a powder tube that is nearly vertical and has an inlet at its lower portion.
Claim 9
Dependent Claim
38 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that means for introducing powder is a short pipe communicated with a powder layer that is nearly vertical and has an outlet at its upper portion.
Claim 10
Dependent Claim
45 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that means for introducing powder is a powder feeding side tube having a powder pressure preventing member right above the inlet of the detector tubular passageway and communicated sideways with a powder layer.
Claim 11
Dependent Claim
39 words
An automatic powder feeding apparatus as claimed in Claim 1, characterized in that means for introducing powder is a short pipe opening at the below of the inlet of the detector tubular passageway and communicated with a powder layer.