Patent US4961230A successfully refreshed from Google Patents.
Patent US3694113A successfully refreshed from Google Patents.
US3694113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-unit rotary mechanism
Assignee: John Deere Technologies International Inc
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Filing: 1971-01-12
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Granted: 1972-09-26
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Expires: 1991-01-12
Abstract
Abstract A rotary mechanism of the trochoidal type, having a plurality of operating cavities and a one-piece crankshaft bearing a plurality of eccentric portions, one for the rotor in each operating cavity. The intermediate wall between adjacent operating cavities of such a mechanism has an aperture through which an eccentric may be passed for assembly of the mechanism, and a simple and inexpensive split bearing member assembled around the journal of the shaft in the aperture of the intermediate wall, which is then shrunk into fit to hold and support the bearing member.
Inventors
- 👤 Charles Jones
- 👤 Murray Berkowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:21
CPC Classifications
F; F04; F04C; F04C11/00; F04C11/001; F01; F01C; F01C21/00; F01C21/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
405 words
A multi-unit rotary mechanism comprising in combination at least two axially aligned rotary units having a common one-piece rotatable shaft, each rotary unit having a peripheral housing coaxial with the shaft, an intermediate wall between adjacent units and connected with the adjacent peripheral housings, and an end wall at each end of the rotary mechanism connected with the adjacent peripheral housing thereby defining an operating cavity for each unit, the one-piece shaft passing through each of the intermediate walls and the end walls, the shaft having formed thereon a plurality of axially spaced eccentric portions with one such eccentric portion in each operating cavity and a rotor mounted on each eccentric portion, each rotor having an internaL gear thereon, a plurality of fixed gears disposed about the shaft with one fixed gear for each internal gear and in meshing engagement therewith, each fixed gear having an inner diameter less than the diameter of the eccentric portions, the intermediate wall having an axial bore therethrough of larger diameter than the eccentric portions, and a bearing assembly disposed within the bore and surrounding the journal of the shaft between eccentric portions, the bearing assembly comprising: a. a sleeve bearing split into a plurality of partial cylindrical portions surrounding the journal of the shaft between two eccentric portions and having an inner diameter suitable to provide a bearing surface for the shaft journal; b. a generally cylindrical bearing support member split axially into a plurality of partial cylindrical portions surrounding the sleeve bearing and having its inner diameter in frictional engagement with the outer diameter of the sleeve bearing; c. a spacer member split axially into a plurality of arcuate portions surrounding the bearing support and having its inner diameter in frictional engagement with the outer diameter of the bearing support and its outer diameter in frictional engagement with the inner diameter of the bore through the intermediate wall; d. each of the arcuate spacer portions comprising a flexible ligament partially surrounding the bearing support and having its inner diameter in frictional engagement with the outer diameter of the bearing support and having on its outer diameter a plurality of circumferentially disposed radially extending pressure transmitting members in frictional engagement with the inner diameter of the bore through the intermediate wall; e. the composite outer diameter of the bearing assembly being greater than the diameter of the bore through the intermediate wall and being in interference fit therewith.
Claim 2
Dependent Claim
405 words
A multi-unit rotary mechanism comprising in combination at least two axially aligned rotary units having a common one-piece rotatable shaft, each rotary unit having a peripheral housing coaxial with the shaft, an intermediate wall between adjacent units and connected with the adjacent peripheral housings, and an end wall at each end of the rotary mechanism connected with the adjacent peripheral housing thereby defining an operating cavity for each unit, the one-piece shaft passing through each of the intermediate walls and the end walls, the shaft having formed thereon a plurality of axially spaced eccentric portions with one such eccentric portion in each operating cavity and a rotor mounted on each eccentric portion, each rotor having an internaL gear thereon, a plurality of fixed gears disposed about the shaft with one fixed gear for each internal gear and in meshing engagement therewith, each fixed gear having an inner diameter less than the diameter of the eccentric portions, the intermediate wall having an axial bore therethrough of larger diameter than the eccentric portions, and a bearing assembly disposed within the bore and surrounding the journal of the shaft between eccentric portions, the bearing assembly comprising: a. a sleeve bearing split into a plurality of partial cylindrical portions surrounding the journal of the shaft between two eccentric portions and having an inner diameter suitable to provide a bearing surface for the shaft journal; b. a generally cylindrical bearing support member split axially into a plurality of partial cylindrical portions surrounding the sleeve bearing and having its inner diameter in frictional engagement with the outer diameter of the sleeve bearing; c. a spacer member split axially into a plurality of arcuate portions surrounding the bearing support and having its inner diameter in frictional engagement with the outer diameter of the bearing support and its outer diameter in frictional engagement with the inner diameter of the bore through the intermediate wall; d. each of the arcuate spacer portions comprising a flexible ligament partially surrounding the bearing support and having its inner diameter in frictional engagement with the outer diameter of the bearing support and having on its outer diameter a plurality of circumferentially disposed radially extending pressure transmitting members in frictional engagement with the inner diameter of the bore through the intermediate wall; e. the composite outer diameter of the bearing assembly being greater than the diameter of the bore through the intermediate wall and being in interference fit therewith.
Claim 3
Dependent Claim
35 words
The combination recited in claim 1, wherein the outer diameter of the spacer is provided with radially extending spline-like projections integral with the ligament and separated by slots to reduce the rigidity of the spacer.
Claim 4
Dependent Claim
149 words
The combination recited in claim 1, wherein one end of the bearing support member bears a fixed gear in meshing engagement with the internal gear of a rotor, and the bearing assembly is provided with means restraining it from axial and angular movement within the intermediate wall bore, the restraining means comprising: a. at one end of the bearing assembly the spacer member having a shoulder seated axially against the intermediate wall and the bearing support member having a shoulder seated axially against the spacer, b. at the opposite end of the bearing assembly the intermediate wall, the spacer member, and the bearing support being each provided with at least one keyway, the keyway of each member being mutually aligned with the keyways of the other members, and c. a key positioned in and mutually engaging such keyways to angularly position the gear borne by the bearing support member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |