Brake system for automatic transmission
Patent 4930373 Issued on June 5, 1990. Estimated Expiration Date: 
October 17, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 17, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2513192 2901888 2966888 3353637 3540558 Speed change control system for an automatic transmission Hydraulic servo device with built-in accumulator Three-position working cylinder having dual concentric pistons Patent #: 4773300 InventorsAssigneeApplicationNo. 258770 filed on 10/17/1988US Classes:475/128, Valving controls shift timing92/52, Cylinder or sleeve forms working member92/62, First working member moves second coaxial working member through separating abutment surfaces188/77R, Strap475/146, Fluid motor structure475/148, With one-way device475/285Including one-way clutch or brakeExaminersPrimary: Herrmann, Allan D.Assistant: Campbell, Christopher Attorney, Agent or FirmForeign Patent References
International ClassesF16H 003/44F16D 051/00 F01B 007/20 F01B 007/00 Foreign Application Priority Data1987-12-04 JPAbstractHerein disclosed is a brake system for use with an automatic transmission for braking a rotatable member such as a brake drum, which is accommodated in a casing and connected to the sun gear or the like of a planetary gear mechanism, by bringing a brake band having two ends into contact with the outer circumference with the rotatable member. The brake system comprises: a cylinder tube so held in a predetermined position in the casing as to move forward and backward in the tangential direction of the rotatable member; a piston fitted in the cylinder tube; a piston rod united with the piston and projecting from the cylinder tube such that it is connected to one end of the brake band; an anchor rod so held in a predetermined position in the casing as to move forward and backward in the tangential direction of the rotatable member and conneced to the other end of the brake band; a connecting member for connecting the cylinder tube and the anchor rod so tha they may move together forward and backward; and a valve mechanism disposed in the cylinder tube and adapted to be opened, when the cylinder tube is moved by a force received in a predetermined direction from the brake band through the piston rod to either apply a fluid pressure in a direction to reduce the fastening force by the brake band or release the fluid pressure.Field of SearchStrapWrap band type Cylinder or sleeve forms working member MUTUALLY RELATIVELY MOVABLE CYLINDER OR SLEEVE, MEMBER SEALINGLY SLIDABLE THEREIN AND OUTER CYLINDER THEREFOR First working member moves second coaxial working member through separating abutment surfaces With separate biasing means for a working member | |
