Patent US3678733A successfully refreshed from Google Patents.
US3678733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic viscometer
Assignee: Bendix Corp
•
Filing: 1970-09-24
•
Granted: 1972-07-25
•
Expires: 1990-09-24
Abstract
Abstract A fluidic viscometer is disclosed herein which includes a proportional fluidic amplifier and associated circuit means operative to provide an output pressure signal related to the viscosity of the fluid passing through the fluidic device. Fluidic from a pressure source enters a pressure port in the device and also, after passage through a laminar resistor, a control port whence it interacts with the pressure port stream. The pressure recovered from the combined stream is then related to the supply pressure or control pressure to indicate the viscosity of the fluid.
Inventors
- 👤 Albert Blatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:50
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2273
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A viscometer comprising in combination: a pressure source of fluid the viscosity of which fluid is to be determined; a fluidic proportional amplifier means having an input nozzle, a fluid interaction region, at least one control port, and at least one output port; means interconnecting said source with said nozzle; further means interconnecting said source with said at least one control port whereby said source provides a first fluid stream entering said interaction region from said nozzle and a second fluid stream entering said interaction region from said control port and proportionally diverting the flow of said first fluid stream; fluid laminar resistance means within said further means operative to alter flow through said control port in response to fluid viscosity changes; means connected to said at least one output port operative to determine output pressure; and means responsive to a function of said output pressure and said source pressure for indicating the viscosity of said fluid.
Claim 2
Dependent Claim
157 words
A viscometer comprising in combination: a pressure source of fluid the viscosity of which fluid is to be determined; a fluidic proportional amplifier means having an input nozzle, a fluid interaction region, at least one control port, and at least one output port; means interconnecting said source with said nozzle; further means interconnecting said source with said at least one control port whereby said source provides a first fluid stream entering said interaction region from said nozzle and a second fluid stream entering said interaction region from said control port and proportionally diverting the flow of said first fluid stream; fluid laminar resistance means within said further means operative to alter flow through said control port in response to fluid viscosity changes; means connected to said at least one output port operative to determine output pressure; and means responsive to a function of said output pressure and said source pressure for indicating the viscosity of said fluid.
Claim 3
Dependent Claim
75 words
The device as claimed in claim 1 wherein: said amplifier means include a pair of output ports and the second fluid stream is operative to vary the proportional distribution of the combine first and second fluid stream between said pair of output ports; and said means responsive to a function of said output pressure and said source pressure include differential pressure determining means operative to indicate the pressure differential between said pair of output ports.
Claim 4
Dependent Claim
24 words
The device as claimed in claim 2 wherein the second of said pair of output ports is a vent port communicating to the ambient.
Claim 5
Dependent Claim
28 words
The device as claimed in claim 3 wherein the firSt of said pair of output ports has a diameter no greater than one-half of the input nozzle diameter.
Claim 6
Dependent Claim
20 words
The device as claimed in claim 1 wherein said input nozzle and said at least one output port are coaxial.
References Cited (Backward Citations)
US3568693A
Cited
US3505855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |