US4454779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive for a variable-stroke swash plate mechanism
Assignee: US Philips Corp
•
Filing: 1979-04-16
•
Granted: 1984-06-19
•
Expires: 1999-04-16
Abstract
Abstract A drive for a variable-stroke swash plate machine, comprising a rotatably journalled shaft and a swash plate mounted so that the plate cannot rotate with respect to the shaft during operation. The plate is journalled on the shaft so that it is rotatable about an axis of rotation which intersects the shaft axis at an acute angle. A first conical gear on the plate engages a second conical gear on a sleeve arranged coaxially around the shaft. Control means rotate the sleeve and second conical gear with respect to the shaft.
Inventors
- 👤 Jan Vos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:16
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/10; F01B3/101; F01B3/102; F16; F16B; F16B37/00; F16B37/04; F16B37/041; F16B37/043; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
207 words
A drive for a variable-stroke swash plate mechanism comprising a rotatably journalled shaft and a plate mounted on the shaft such that the plate cannot rotate with respect to the shaft during steady state operation, the plate being adjustable with respect to the shaft so that the angle between the plate and the shaft can be varied, characterized in that the plate is journalled on the shaft so that it is rotatable about an axis of plate rotation which intersects the shaft axis at an acute angle, the plate comprises a first conical gear ring defining a conical surface through the pitch circle of the teeth, the cone axis being coaxial with said axis of plate rotation and the cone apex being located at the point where the axis of plate rotation intersects the shaft axis, and the drive further comprises a sleeve arranged coaxially around the shaft and having a second conical gear meshing with said first conical gear, a conical surface through the pitch circle of the teeth of said second gear having the same apex location as the conical surface defined by the first gear ring, and control means for locking or relatively rotating the sleeve and second gear with respect to the shaft.
Claim 2
Dependent Claim
207 words
A drive for a variable-stroke swash plate mechanism comprising a rotatably journalled shaft and a plate mounted on the shaft such that the plate cannot rotate with respect to the shaft during steady state operation, the plate being adjustable with respect to the shaft so that the angle between the plate and the shaft can be varied, characterized in that the plate is journalled on the shaft so that it is rotatable about an axis of plate rotation which intersects the shaft axis at an acute angle, the plate comprises a first conical gear ring defining a conical surface through the pitch circle of the teeth, the cone axis being coaxial with said axis of plate rotation and the cone apex being located at the point where the axis of plate rotation intersects the shaft axis, and the drive further comprises a sleeve arranged coaxially around the shaft and having a second conical gear meshing with said first conical gear, a conical surface through the pitch circle of the teeth of said second gear having the same apex location as the conical surface defined by the first gear ring, and control means for locking or relatively rotating the sleeve and second gear with respect to the shaft.
Claim 3
Dependent Claim
32 words
A drive as claimed in claim 1, characterized in that the conical surface defined by the second gear has a smaller apex angle than the conical surface defined by the first gear.
Claim 4
Dependent Claim
38 words
A drive as claimed in claim 1, characterized in that the conical surface defined by the second gear has an apex angle facing the other side of the shaft from the conical surface defined by the first gear.
Claim 5
Dependent Claim
72 words
A drive as claimed in claim 1, 2 or 3, characterized in that said control means comprises at least two vanes connected to the sleeve and extending in the axial direction of the sleeve, and a part fixed to the shaft, enveloping said vanes in a sealing manner, and having at least two fixed vanes extending toward said sleeve, and liquid inlet and outlet duct openings communicating with spaces between said vanes.
Claim 6
Dependent Claim
64 words
A drive as claimed in claim 1, 2 or 3, characterized in that the drive further comprises a sun gear fixed to the sleeve, an internal gear wheel arranged for rotation about the shaft axis, at least one planet gear journalled to the shaft and meshing both with the sun gear and the internal gear, and an output shaft connected to the internal gear.
Claim 7
Dependent Claim
25 words
A drive as claimed in claim 1, 2 or 3, characterized in that the sleeve is further connected to the shaft by an energy buffer.
Claim 8
Dependent Claim
17 words
A drive as claimed in claim 6, characterized in that the energy buffer is a torsion bar.
References Cited (Backward Citations)
US925148A
Cited
US1394811A
Cited
US1945391A
Cited
US2465638A
Cited
US3511102A
Cited
US4030404A
Cited
US4168632A
Cited
US4235116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |