US3712754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dosing device
Assignee: US Philips Corp
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Filing: 1970-12-03
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Granted: 1973-01-23
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Expires: 1990-12-03
Abstract
Abstract A dosing device for the pulse-free and continuous supply of very small quantities of medium per unit of time. A cylindrical rotor which can be coupled to a drive has a rotor capable of rotating with a very small amount of play in a cylinder surrounding it; the rotor or cylinder is provided with one or more shallow pumping grooves, each of which is situated in a plane transverse to the rotor axis. Each of said pumping grooves is interrupted in at least one place on the rotor circumference by a dam, the cylindrical outer surface of which coincides with the cylindrical surface of the rotor cylinder. A medium supply duct terminates on the one side of each dam in the relevant groove, and a medium discharge duct communicates with the relevant groove on the other side.
Inventors
- 👤 G Brouwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:44
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0289; B01L3/0293; F; F04; F04D; F04D5/00; F04D5/001; G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
200 words
A dosing device operable with a source of fluid medium for providing a pulse-free and continuous supply of fluid medium, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a circular discharge groove defining a plane transverse to the rotor axis, a similar circular supply groove axially spaced from said discharge groove, intermediate and axially spaced from each of said discharge and supply grooves, a similar but shallower in depth pumping groove defining an incomplete circle having two ends, an axial supply groove communicating the circular supply groove with one end of said pumping groove, an axial discharge groove communicating said circular discharge groove with the other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the circular supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 2
Dependent Claim
200 words
A dosing device operable with a source of fluid medium for providing a pulse-free and continuous supply of fluid medium, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a circular discharge groove defining a plane transverse to the rotor axis, a similar circular supply groove axially spaced from said discharge groove, intermediate and axially spaced from each of said discharge and supply grooves, a similar but shallower in depth pumping groove defining an incomplete circle having two ends, an axial supply groove communicating the circular supply groove with one end of said pumping groove, an axial discharge groove communicating said circular discharge groove with the other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the circular supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 3
Dependent Claim
189 words
A dosing device operable with a source of fluid for providing a pulse-free and continuous supply of fluid, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal interface except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a continuous main discharge groove circumscribing said interface, a similar main supply groove axially spaced from said main discharge groove, intermediate and axially spaced from each of said main discharge and supply grooves, a non-continuous pumping groove having two ends, an axial supply groove communicating said main supply groove with one end of said pumping groove, an axial discharge groove communicating said main discharge groove with tHe other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the main supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 4
Dependent Claim
189 words
A dosing device operable with a source of fluid for providing a pulse-free and continuous supply of fluid, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal interface except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a continuous main discharge groove circumscribing said interface, a similar main supply groove axially spaced from said main discharge groove, intermediate and axially spaced from each of said main discharge and supply grooves, a non-continuous pumping groove having two ends, an axial supply groove communicating said main supply groove with one end of said pumping groove, an axial discharge groove communicating said main discharge groove with tHe other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the main supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 5
Dependent Claim
189 words
A dosing device operable with a source of fluid for providing a pulse-free and continuous supply of fluid, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal interface except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a continuous main discharge groove circumscribing said interface, a similar main supply groove axially spaced from said main discharge groove, intermediate and axially spaced from each of said main discharge and supply grooves a non-continuous pumping groove having two ends, a secondary supply groove communicating said main supply groove with one end of said pumping groove, a secondary discharge groove communicating said main discharge groove with the other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the main supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 6
Dependent Claim
189 words
A dosing device operable with a source of fluid for providing a pulse-free and continuous supply of fluid, comprising a cylindrical housing, a cylindrical rotor rotatable within the housing, the housing and rotor having respectively inner and outer surfaces that are closely adjacent and form a fluid seal interface except for flow paths between said surfaces, each path being formed as a groove in at least one of said surfaces, said paths including a continuous main discharge groove circumscribing said interface, a similar main supply groove axially spaced from said main discharge groove, intermediate and axially spaced from each of said main discharge and supply grooves a non-continuous pumping groove having two ends, a secondary supply groove communicating said main supply groove with one end of said pumping groove, a secondary discharge groove communicating said main discharge groove with the other end of the pumping groove, the housing having supply and discharge apertures extending through the wall thereof and positioned to communicate respectively with the main supply and discharge grooves, whereby fluid from said source entering said supply aperture is discharged at a selected rate through said discharge aperture.
Claim 7
Dependent Claim
16 words
Apparatus according to claim 1 wherein said grooves are formed only in the rotor outer surface.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 1 wherein said grooves are formed only in the housing inner surface.
Claim 9
Dependent Claim
37 words
Apparatus according to claim 1 wherein each pumping groove is shallow having depth in the radial direction of less than 100 Mu m., and said supply and discharge grooves are comparatively deep relative to said pumping groove.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 1 wherein the portion of said housing and rotor surfaces defining said non-continuous pumping groove comprise at least three equally spaced circular sections.
Claim 11
Dependent Claim
54 words
Apparatus according to claim 1 further comprising a cylindrical outer sleeve having a second discharge aperture extending through a wall thereof, this sleeve circumscribing said housing and positioned such that their discharge apertures correspond, the sleeve being rotatable relative to said housing for varying the alignment of the flow paths of said discharge apertures.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 1 wherein said pumping grooves have depth extending radially of approximately 40 Mu m and said supply and discharges grooves have depth of approximately 0.5 mm.
Claim 13
Dependent Claim
66 words
Apparatus according to claim 2 wherein there is a second separate and similar supply aperture in the housing, and in said rotor, second main and secondary supply ducts, pumping groove, and secondary discharge groove, the latter of which feeds into said main discharge groove with said two main supply grooves being axially remote, whereby equilibrium may be established by equal and opposite forces on said rotor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |