Patent US4793198A successfully refreshed from Google Patents.
US4793198A
Expired / Lapsed
US
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Fluid flow motion reduction system
Assignee: Raytheon Co
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Filing: 1987-05-29
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Granted: 1988-12-27
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Expires: 2007-05-29
Abstract
Abstract A fluid flow motion reduction apparatus capable of a very small and reduced movement in one and two dimensions. The motion reduction apparatus applies the principles of Couette flow to a set of stacked plates, the plates being separated from one another by a Newtonian fluid. In the preferred embodiment, a top plate moves causing the fluid upon which it resides to flow. This fluid presses against an interleaved driven plate, which imparts a force on a lower fluid of greater viscosity than the top plate fluid. The resulting linear displacement of the driven plate is substantially reduced when compared to the distance traversed by the top plate, thus resulting in substantial motion reduction. An alternative embodiment discloses a joystick-driven, two dimensional motion reduction apparatus having a joystick with a double ball bearing assembly at one end seated in a conical aperture of the top plate. This embodiment is capable of both X and Y axis motion. The double ball bearing assembly is seated in a ball socket formed by the plates and may be locked into place by an adjustable screw.
Inventors
- 👤 Jon H. Myer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:47
CPC Classifications
G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04703; G05G2009/04707; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992; Y10T74/20; Y10T74/20012; Y10T74/20201
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A fluid flow motion reduction apparatus, comprising: at least three plates including a top movable plate, a bottom stationary plate, and an interleaved driven plate positioned between the top plate and the bottom plate; a first fluid positioned between said top movable plate and said interleaved driven plate; a second fluid positioned between said interleaved driven plate and said bottom plate, said second fluid being of a higher viscosity than said first fluid; and means for separating said plates in a substantially frictionless manner; whereby, when a lateral displacement is imparted on said top movable plate, the interleaved driven plate moves a smaller lateral distance compared to the movement of said top plate.
Claim 2
Dependent Claim
113 words
A fluid flow motion reduction apparatus, comprising: at least three plates including a top movable plate, a bottom stationary plate, and an interleaved driven plate positioned between the top plate and the bottom plate; a first fluid positioned between said top movable plate and said interleaved driven plate; a second fluid positioned between said interleaved driven plate and said bottom plate, said second fluid being of a higher viscosity than said first fluid; and means for separating said plates in a substantially frictionless manner; whereby, when a lateral displacement is imparted on said top movable plate, the interleaved driven plate moves a smaller lateral distance compared to the movement of said top plate.
Claim 3
Dependent Claim
22 words
The fluid flow motion reduction apparatus of claim 1, wherein said means for separating said plates are a plurality of steel balls.
Claim 4
Dependent Claim
25 words
The fluid flow motion reduction apparatus of claim 1, wherein said plates and said first and second fluids are collectively contained in a fluid-sealed housing.
Claim 5
Dependent Claim
100 words
A fluid flow motion reduction apparatus as in claim 1, which includes: a joystick having a double bearing assembly at one end; said top movable plate defining a conically formed aperture for receiving a bearing of said double bearing assembly; an additional plate and an additional fluid layer, said additional fluid layer being of the same viscosity as the first fluid, said additional plate positioned above said top movable plate; said additional plate forming a socket for receiving said joystick; and, an adjustable screw for locking another bearing of said double bearing assembly into said fluid flow motion reduction apparatus.
Claim 6
Dependent Claim
145 words
A fluid flow motion reduction apparatus, comprising: at least three parallel flat plates, including a movable top plate, an interleaved driven plate, and a stationary bottom plate; a first fluid positioned and contained between said movable top plate and said interleaved driven plate; a second fluid positioned and contained between said interleaved driven plate and said stationary bottom plate, said first and second fluids having equal viscosity; and means for positioning said plates along an axis orthogonal to their respective planes, such that the distance between said top plate and said driven plate is substantially greater than the distance between said driven plate and said bottom plate, so that when a lateral force is imparted to said top plate, the driven plate is linearly displaced by a substantially smaller displacement than the linear displacement of said top plate, thereby producing a reduction of lateral displacement.
Claim 7
Dependent Claim
145 words
A fluid flow motion reduction apparatus, comprising: at least three parallel flat plates, including a movable top plate, an interleaved driven plate, and a stationary bottom plate; a first fluid positioned and contained between said movable top plate and said interleaved driven plate; a second fluid positioned and contained between said interleaved driven plate and said stationary bottom plate, said first and second fluids having equal viscosity; and means for positioning said plates along an axis orthogonal to their respective planes, such that the distance between said top plate and said driven plate is substantially greater than the distance between said driven plate and said bottom plate, so that when a lateral force is imparted to said top plate, the driven plate is linearly displaced by a substantially smaller displacement than the linear displacement of said top plate, thereby producing a reduction of lateral displacement.
Claim 8
Dependent Claim
43 words
The fluid flow reduction apparatus of claim 5, wherein the means for positioning the plates along an axis orthogonal to their respective planes is a housing which encases the plates and the fluids so as to contain the apparatus in an enclosed structure.
Claim 9
Dependent Claim
188 words
A fluid flow motion reduction apparatus, comprising: a bidirectional movable assembly, including: at least two flat plates disposed along a central axis orthogonal to their respective parallel planes, said plates including a top movable driving plate and an interleaved driven plate, each of said plates having a central aperture along said axis; a first Newtonian fluid positioned between said driving plate and said driven plate; a second Newtonian fluid of a higher viscosity than said first fluid, positioned on the underside of said driven plate; and, a joystick passing through said central apertures of the driving and driven plate, said joystick having a ball joint bearing assembly at its lower end; said ball joint bearing assembly mounted within a socket, said socket being formed with a lower stationary housing; wherein, said bidirectionary movable assembly is seated within said housing so that as the joystick is moved, the bearing assembly moves within the socket and the driving and driven plates are caused to move relative to one another so that the driven plate exhibits substantial but proportional reduced displacement when compared to the distance traversed by said driving plate.
Claim 10
Dependent Claim
188 words
A fluid flow motion reduction apparatus, comprising: a bidirectional movable assembly, including: at least two flat plates disposed along a central axis orthogonal to their respective parallel planes, said plates including a top movable driving plate and an interleaved driven plate, each of said plates having a central aperture along said axis; a first Newtonian fluid positioned between said driving plate and said driven plate; a second Newtonian fluid of a higher viscosity than said first fluid, positioned on the underside of said driven plate; and, a joystick passing through said central apertures of the driving and driven plate, said joystick having a ball joint bearing assembly at its lower end; said ball joint bearing assembly mounted within a socket, said socket being formed with a lower stationary housing; wherein, said bidirectionary movable assembly is seated within said housing so that as the joystick is moved, the bearing assembly moves within the socket and the driving and driven plates are caused to move relative to one another so that the driven plate exhibits substantial but proportional reduced displacement when compared to the distance traversed by said driving plate.
Claim 11
Dependent Claim
58 words
The fluid flow reduction apparatus of claim 7, further including: a dual sphere bearing assembly comprising at least a lower contact sphere attached to said joystick and separated from a higher contact sphere by a short portion of the lower part of the joystick so that the driven plate may be moved along at least two different dimensions.
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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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |