Patent US3784336A successfully refreshed from Google Patents.
US3784336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
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Filing: 1971-12-10
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Granted: 1974-01-08
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Expires: 1991-12-10
Abstract
Abstract An orbital or compound displacement fluid motor has an internally lobed stator and an externally lobed rotor-orbitor with one lobe less than the number of lobes on the stator. An output shaft is journalled in the housing coaxially with the stator and a driving connection from the rotor-orbitor is provided by a single, very loose fitting spline drive providing direct driving contact from the rotor-orbitor to the shaft. This avoids the use of the inclined coupling shaft commonly used in orbital motors and provides greater durability at a lower production cost.
Inventors
- 👤 R Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:23
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0057; F04C15/0061; F03; F03C; F03C2/00; F03C2/08; F16; F16H; F16H1/00; F16H1/28; F16H1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A fluid motor of the compound displacement type comprising a body having inlet and outlet cavities, an internally lobed stator, an externally lobed rotor-orbitor engaging the stator to provide a series of expansible chambers, a drive-shaft journalled in the body coaxially with thE base circle of the stator lobes, means including an internal spline in the rotor-orbitor and an external spline on the shaft directly engaging the internal spline for transferring rotation but not orbital motion to the shaft, the splines having equal numbers of teeth with each internal spline tooth having a profile generated by the relative motion of an external spline tooth orbiting about the center of the rotor-orbitor with the eccentricity of orbital motion and means for communicating the flow of fluid between the expansible chambers and the inlet and outlet cavities.
Claim 2
Dependent Claim
135 words
A fluid motor of the compound displacement type comprising a body having inlet and outlet cavities, an internally lobed stator, an externally lobed rotor-orbitor engaging the stator to provide a series of expansible chambers, a drive-shaft journalled in the body coaxially with thE base circle of the stator lobes, means including an internal spline in the rotor-orbitor and an external spline on the shaft directly engaging the internal spline for transferring rotation but not orbital motion to the shaft, the splines having equal numbers of teeth with each internal spline tooth having a profile generated by the relative motion of an external spline tooth orbiting about the center of the rotor-orbitor with the eccentricity of orbital motion and means for communicating the flow of fluid between the expansible chambers and the inlet and outlet cavities.
References Cited (Backward Citations)
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |