US4531365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutral start for hydrostatic transmission
Assignee: Deere and Co
•
Filing: 1984-01-31
•
Granted: 1985-07-30
•
Expires: 2004-01-31
Abstract
Abstract A hydrostatic transmission including a pump and motor unit wherein the pump unit is displaceable effectuated by an operative member integral to the pump unit. A neutral start switch communicating with a carrying machine is mounted in the pump unit to contact the operative member in a manner causing the neutral start switch to become operative only when the operative member is assuming a neutral position.
Inventors
- 👤 Lee J. Wanie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:15
CPC Classifications
F; F16; F16D; F16D31/00; F16D31/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
In a radial piston hydrostatic transmission including a pump and motor unit in fluid communication, said pump unit rotor carrying a plurality of radial piston balls, a control ring pivotal mount in a pump housing around said rotor, a member pivotally received in a seat on said control ring, a control shaft rotatably mounted in said pump housing having a transversely extending linking arm slidably received in said member such that rotation off said control shaft causes said control ring to pivot, wherein the improvement comprises means for detecting a neutral location of said control ring and for providing resistance to creep of said control ring in said neutral location, said means including said member having a concavity form on one surface, and a switch having a contact surface matingly sized to said concavity, said contact surface of said switch to be received in said concavity when said control ring occupies said neutral location.
Claim 2
Dependent Claim
154 words
In a radial piston hydrostatic transmission including a pump and motor unit in fluid communication, said pump unit rotor carrying a plurality of radial piston balls, a control ring pivotal mount in a pump housing around said rotor, a member pivotally received in a seat on said control ring, a control shaft rotatably mounted in said pump housing having a transversely extending linking arm slidably received in said member such that rotation off said control shaft causes said control ring to pivot, wherein the improvement comprises means for detecting a neutral location of said control ring and for providing resistance to creep of said control ring in said neutral location, said means including said member having a concavity form on one surface, and a switch having a contact surface matingly sized to said concavity, said contact surface of said switch to be received in said concavity when said control ring occupies said neutral location.
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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |