US3693478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission having a converter clutch and a control
Assignee: Motors Liquidation Co
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Filing: 1971-01-06
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Granted: 1972-09-26
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Expires: 1991-01-06
Abstract
Abstract A transmission and control having a limited slip clutch located between the impeller and turbine members of the torque converter to improve transmission efficiency and reduce heat losses. A valve member responsive to turbine speed is incorporated in the control for controlling the engagement force on the clutch thereby controlling the amount of slip between the torque converter impeller and turbine members. A control valve is also included to prevent engagement of the clutch except when the high gear ratio is established in the transmission.
Inventors
- 👤 John D Malloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:57
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/14; F16H61/141; F16H61/142; F16H45/00; F16H45/02; F16H2045/0273; F16H2045/0294
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A transmission and control comprising torque converter means having an input member and an output member; clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to and from said clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque converter means for controlling the engagement pressure and slipping condition of said clutch means in proportion to the speed of said one member of said torque converter means.
Claim 2
Dependent Claim
125 words
A transmission and control comprising torque converter means having an input member and an output member; clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to and from said clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque converter means for controlling the engagement pressure and slipping condition of said clutch means in proportion to the speed of said one member of said torque converter means.
Claim 3
Dependent Claim
144 words
A transmission and control comprising torque converter means having an impeller member and a turbine member; clutch means having a hub portion drivingly connected with said turbine member and a clutch plate secured to said hub portion being selectively engageable at various slipping conditions with said impeller member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to and from said torque converter means and said clutch means, and centrifugal valve means disposed in said hub portion in fluid communication with said torque converter means responsive to the speed of said turbine member for controlling the engagement pressure and slipping condition of said clutch plate in proportion to the speed of said turbine member.
Claim 4
Dependent Claim
144 words
A transmission and control comprising torque converter means having an impeller member and a turbine member; clutch means having a hub portion drivingly connected with said turbine member and a clutch plate secured to said hub portion being selectively engageable at various slipping conditions with said impeller member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to and from said torque converter means and said clutch means, and centrifugal valve means disposed in said hub portion in fluid communication with said torque converter means responsive to the speed of said turbine member for controlling the engagement pressure and slipping condition of said clutch plate in proportion to the speed of said turbine member.
Claim 5
Dependent Claim
151 words
A transmission and control comprising torque converter means having an impeller and a turbine; clutch means having a clutch plate drivingly connected with said turbine and being selectively engageable at various slipping conditions with said impeller; said clutch plate having a forward face and a rearward face and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to the rearward face of said clutch plate for engaging said clutch means and to the forward face clutch plate for disengaging said clutch means, and centrifugal valve means responsive to the speed of said turbine for controlling the pressure of the fluid directed to said rearward face to control the slipping condition of said clutch means in proportion to the speed of said turbine.
Claim 6
Dependent Claim
151 words
A transmission and control comprising torque converter means having an impeller and a turbine; clutch means having a clutch plate drivingly connected with said turbine and being selectively engageable at various slipping conditions with said impeller; said clutch plate having a forward face and a rearward face and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, clutch control valve means for controlling the flow of fluid to the rearward face of said clutch plate for engaging said clutch means and to the forward face clutch plate for disengaging said clutch means, and centrifugal valve means responsive to the speed of said turbine for controlling the pressure of the fluid directed to said rearward face to control the slipping condition of said clutch means in proportion to the speed of said turbine.
Claim 7
Dependent Claim
174 words
A transmission and control comprising torque converter means having an input member and an output member; clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, solenoid valve means in fluid communication with said source; switch means controlled by vehicle speed and transmission drive ratio for controlling said solenoid valve means, clutch control valve means in fluid communication with said source and said solenoid valve means and being responsive to said solenoid valve means for controlling the flow of fluid to and from said torque converter means and said clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque converter means for controlling the engagement pressure and slipping condition of said clutch means in proportion to the speed of said one member of said torque converter means.
Claim 8
Dependent Claim
174 words
A transmission and control comprising torque converter means having an input member and an output member; clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; and control means for controlling the engagement of said clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, solenoid valve means in fluid communication with said source; switch means controlled by vehicle speed and transmission drive ratio for controlling said solenoid valve means, clutch control valve means in fluid communication with said source and said solenoid valve means and being responsive to said solenoid valve means for controlling the flow of fluid to and from said torque converter means and said clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque converter means for controlling the engagement pressure and slipping condition of said clutch means in proportion to the speed of said one member of said torque converter means.
Claim 9
Dependent Claim
240 words
A transmission and control comprising torque converter means having an input member and an output member; converter clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; planetary gearing means having a transmission output, a low gear ratio and a higher gear ratio and high clutch means for establishing the high gear ratio; and control means for controlling the engagement of said converter clutch means and said high clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, governer means for providing a pressure proportional to the speed of said transmission output, load means for providing a pressure proportional to the transmission load, solenoid valve means in fluid communication with said source, three switch means controlled by said governor means, said high clutch means, and said load means respectfully for controlling said solenoid valve means, clutch control valve means in fluid communication with said source and said solenoid valve means and being responsive to said solenoid valve means for controlling the flow of fluid to and from said torque converter means and said converter clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque means for controlling the engagement pressure and slipping condition of said converter clutch meanS in proportion to the speed of said one member of said torque converter means.
Claim 10
Dependent Claim
240 words
A transmission and control comprising torque converter means having an input member and an output member; converter clutch means drivingly connected with said output member and being selectively engageable at various slipping conditions with said input member; planetary gearing means having a transmission output, a low gear ratio and a higher gear ratio and high clutch means for establishing the high gear ratio; and control means for controlling the engagement of said converter clutch means and said high clutch means including a source of fluid pressure in fluid communication with said torque converter means and said clutch means, governer means for providing a pressure proportional to the speed of said transmission output, load means for providing a pressure proportional to the transmission load, solenoid valve means in fluid communication with said source, three switch means controlled by said governor means, said high clutch means, and said load means respectfully for controlling said solenoid valve means, clutch control valve means in fluid communication with said source and said solenoid valve means and being responsive to said solenoid valve means for controlling the flow of fluid to and from said torque converter means and said converter clutch means, and centrifugal valve means responsive to the speed of one of said members of said torque means for controlling the engagement pressure and slipping condition of said converter clutch meanS in proportion to the speed of said one member of said torque converter means.
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 |