US3619089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure device
Assignee: Automatic Radio Manufacturing Co Inc
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Filing: 1970-03-13
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Granted: 1971-11-09
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Expires: 1990-03-13
Abstract
Abstract A fluid-pressure device, operated as a pump, motor, or the like, and including cooperating inner and outer gear portions which are angularly movable in relation to one another, is caused to make tight line-contact sealing for entrapped fluid, by way of a plurality of pressure-actuated sealing rollers which exhibit only low levels of friction confined to limited sealing intervals during rotational cycles. In a fluid pump construction, based in part upon a known design in which the inner and outer gear portions have different numbers of teeth and in which the resulting tooth contacts function to prevent fluid leakage between spaced teeth, the outwardly projecting teeth of the inner gear portion are formed by cylindrical rollers radially pressurized into tight rolling line contact with surfaces of the surrounding internally toothed gear portion at selected intervals as the result of commutator-type valving of the fluid-pressures developed by the pump. Manufacturing tolerances are relatively noncritical, because of the dynamic operations of the roller teeth, and the outer gear portion, rollers, and pressure-applying inner gear support structure for the rollers, all possess axial symmetries which enable them to be manufactured conveniently and economically by separations from elongated extrusions, and the like.
Inventors
- 👤 Michel A Pierrat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:33
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/08; F01C1/00; F01C1/08; F01C1/10; F01C1/113; F01C20/00; F01C20/24; F01C20/26; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/102
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
Apparatus of the type comprising a pair of cooperating rotor structures having external and internal lobes, respectively, one of said structures being mated eccentrically within and having one less lobe than the other, the lobes of said one of said structures being formed by rollers rotatably mounted on said one of said structures at angularly displaced positions and each disposed in substantially line-contact engaging relationship with lobe surfaces of the other of said structures, and means responsive to fluid pressures applying pressure to at least certain ones of said rollers at positions substantially opposite the positions of engagements thereof with said lobe surfaces of said other of said structures, whereby said rollers are pressurized into firm line-contAct rolling engagements with said lobe surfaces of said other of said structures.
Claim 2
Dependent Claim
129 words
Apparatus of the type comprising a pair of cooperating rotor structures having external and internal lobes, respectively, one of said structures being mated eccentrically within and having one less lobe than the other, the lobes of said one of said structures being formed by rollers rotatably mounted on said one of said structures at angularly displaced positions and each disposed in substantially line-contact engaging relationship with lobe surfaces of the other of said structures, and means responsive to fluid pressures applying pressure to at least certain ones of said rollers at positions substantially opposite the positions of engagements thereof with said lobe surfaces of said other of said structures, whereby said rollers are pressurized into firm line-contAct rolling engagements with said lobe surfaces of said other of said structures.
Claim 3
Dependent Claim
159 words
Fluid-pressure apparatus comprising a fluid-tight housing having a fluid inlet and outlet, a pair of cooperating rotor structures within said housing having external and internal lobes, respectively, one of said rotor structures being mated eccentrically within and having one less lobe than the other, the lobes of said one of said structures being formed by rollers rotatably mounted on said one of said structures at angularly displaced positions and each disposed in substantially line-contact engaging relationship with lobe surfaces of the other of said structures, port means connecting said inlet and outlet with spaces between said mated structures at different spaced angular positions, and means responsive to fluid pressures applying pressures to at least certain ones of said rollers at positions substantially opposite the positions of engagements thereof with said lobe surfaces of said other of said structures, whereby said rollers are pressurized into firm line-contact rolling engagement with said lobe surfaces to effect tight sealing of said spaces.
Claim 4
Dependent Claim
159 words
Fluid-pressure apparatus comprising a fluid-tight housing having a fluid inlet and outlet, a pair of cooperating rotor structures within said housing having external and internal lobes, respectively, one of said rotor structures being mated eccentrically within and having one less lobe than the other, the lobes of said one of said structures being formed by rollers rotatably mounted on said one of said structures at angularly displaced positions and each disposed in substantially line-contact engaging relationship with lobe surfaces of the other of said structures, port means connecting said inlet and outlet with spaces between said mated structures at different spaced angular positions, and means responsive to fluid pressures applying pressures to at least certain ones of said rollers at positions substantially opposite the positions of engagements thereof with said lobe surfaces of said other of said structures, whereby said rollers are pressurized into firm line-contact rolling engagement with said lobe surfaces to effect tight sealing of said spaces.
Claim 5
Dependent Claim
124 words
Fluid-pressure apparatus as set forth in claim 2 wherein said one of said structures includes a core on which said rollers are carried about the outer periphery at angularly spaced positions about an axis of angular movement of said core, and further including a shaft supporting said core for said angular movement, said axis being eccentric in relation to the internal lobes of said other of said structures, and wherein said means applying pressure includes means commutating fluid pressure to said opposite positions of certain ones but less than all of said rollers for each angular orientation of said core, thereby pressurizing certain ones but less than all of said rollers into said engagement at any time during angular movements of said rotor core.
Claim 6
Dependent Claim
28 words
Fluid-pressure apparatus as set forth in claim 3 wherein said commutating means commutates the higher of the fluid pressures from the inlet and outlet to said opposite positions.
Claim 7
Dependent Claim
68 words
Fluid-pressure apparatus as set forth in claim 3 further comprising valve means mounted in said housing in position to conduct flow of the fluid between said inlet and outlet in bypass relation to said spaces, means normally biasing said valve means to an open condition wherein it conducts said flow, and means for closing said valve means to block said flow and render said apparatus operative and sealed.
Claim 8
Dependent Claim
17 words
Fluid-pressure apparatus as set forth in claim 5 wherein said valve means comprises an electrical solenoid-actuated valve.
Claim 9
Dependent Claim
74 words
Fluid-pressure apparatus as set forth in claim 3 further comprising a plurality of piston-seat members fitted in radially slidable and substantially fluidtight relation within an accommodating piston chamber in said core each at a different angular position about said axis, said piston-seat members each having a seat surface mated with one of said rollers in substantially fluidtight relation therewith and permitting rotation of the associated one of said rollers in said seat surface thereof.
Claim 10
Dependent Claim
73 words
Fluid-pressure apparatus as set forth in claim 7 wherein said rollers are substantially cylindrical, wherein said seat surfaces of said piston-seat members are substantially semicylindrical concave surfaces, wherein the lobes of said other of said structures are substantially sinuous and extend substantially parallel with said rollers in direction of said axis, and wherein said rollers, core, piston-seat members and lobes of said other of said structures are of substantially the same axial length.
Claim 11
Dependent Claim
27 words
Fluid-pressure apparatus as set forth in claim 8 wherein said other of said structures is mounted for rotation in said housing in eccentric relation to said axis.
Claim 12
Dependent Claim
84 words
Fluid-pressure apparatus as set forth in claim 7 wherein said commutating means includes at least one commutating port opening in said housing in communication with the higher of the fluid pressures from the Inlet and outlet, said core being disposed to close said commutating port opening except at predetermined positions where openings are disposed in said core to communicate fluid pressure from said port opening to said piston chambers and thereby force said piston members and rollers radially outwardly in relation to said core.
Claim 13
Dependent Claim
29 words
Fluid-pressure apparatus as set forth in claim 10 wherein said core openings are exposed at different angular positions about said core axis at one axial extremity of said core.
Claim 14
Dependent Claim
35 words
Fluid-pressure apparatus as set forth in claim 11 including two spaced commutation port openings in said housing, said commutation port openings and said core openings being substantially the same radial distance from said core axis.
Claim 15
Dependent Claim
138 words
Fluid-pressure apparatus as set forth in claim 12 further comprising substantially planar sealing surfaces at the axial extremities of the assembly of said rollers, core, piston-seat members and said other of said structures, wherein said rollers are substantially cylindrical, wherein said seat surfaces of said piston-seat members are substantially semicylindrical concave surfaces, wherein said lobes of said other of said structures are substantially sinuous and extend substantially parallel with said rollers in direction of said axis, wherein said other of said structures is mounted for rotation in said housing in eccentric relation to said axis, wherein said rollers, core, piston-seat members, and said other of said structures are of substantially the same axial length, and wherein said two commutating port openings are at diametrically opposite positions about said axis and extend through one of said planar sealing surfaces.
Claim 16
Dependent Claim
45 words
Fluid-pressure apparatus as set forth in claim 13 wherein said port means comprise angularly spaced openings through one of said planar sealing surfaces, said angularly spaced port openings being disposed substantially on opposite sides of the angular position of said diametrically opposite commutating port openings.
Claim 17
Dependent Claim
58 words
Fluid-pressure apparatus as set forth in claim 14 wherein one of said planar sealing surfaces appear on one side of an axially movable pressure-applying member, means applying the higher of the fluid pressures from said inlet and outlet to the opposite side of said pressure-applying member and thereby dynamically forcing said one of said surfaces against said assembly.
Claim 18
Dependent Claim
40 words
Fluid-pressure apparatus as set forth in claim 14 further comprising means for rotating said shaft and thereby causing fluid to be pumped from said inlet to said outlet, and wherein said commutating ports are in communication with said outlet port.
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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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |