US4044556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic torque converter with a lock-up clutch
Assignee: Toyota Motor Corp
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Filing: 1976-05-05
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Granted: 1977-08-30
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Expires: 1996-05-05
Abstract
Abstract A hydraulic torque converter with a lock-up clutch wherein the cross section of a torus formed by an impeller, turbine and a stator is determined to satisfy that the ratio of its axial length L to its radial height H (L/H) is 0.64-0.80, the ratio of its inner diameter D i to its outer diameter D o (D i /D o ) is 0.40-0.33 and the ratio of an annular flow passage area a at the exit of the impeller to a circular area A defined by the torus outer diameter (a/A) is 0.18-0.23.
Inventors
- 👤 Koujirou Kuramochi
- 👤 Kiyoshi Ohnuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:06
CPC Classifications
F; F16; F16H; F16H41/00; F16H41/24; F16H41/26; F16H45/00; F16H45/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A hydraulic torque converter comprising an input member including an impeller, an output member including a turbine, a reaction member including a stator, and a lock-up clutch adapted to mechanically connect said input member with said output member, wherein the improvement comprises that a torus formed by said impeller, said turbine and said stator is so dimensioned that a ratio of its axial length L to its radial height H (L/H) is substantially from 0.64 to 0.80, the ratio of its inner diameter D i to its diameter D o (D i /D o ) is substantially from 0.40 to 0.33, and the ratio of an annular flow passage area a at the exit of the impeller to a circular area A defined by the torus outer diameter is substantially from 0.18 to 0.23.
Claim 2
Dependent Claim
134 words
A hydraulic torque converter comprising an input member including an impeller, an output member including a turbine, a reaction member including a stator, and a lock-up clutch adapted to mechanically connect said input member with said output member, wherein the improvement comprises that a torus formed by said impeller, said turbine and said stator is so dimensioned that a ratio of its axial length L to its radial height H (L/H) is substantially from 0.64 to 0.80, the ratio of its inner diameter D i to its diameter D o (D i /D o ) is substantially from 0.40 to 0.33, and the ratio of an annular flow passage area a at the exit of the impeller to a circular area A defined by the torus outer diameter is substantially from 0.18 to 0.23.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |