Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1988-07-05
1990-06-12
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74868, 251 48, B60K 4106
Patent
active
049322826
ABSTRACT:
An inlet port of a manual timing valve is pressurized from a source of regulated line pressure through a manual valve when the vehicle operator selects certain gears manually. Hydraulic flow through this port enters the manual timing valve through an orifice sized to control the flow rate. A first volume of the timing valve increases in size as a first piston moves due to pressure of fluid flowing to the valve through the orifice. Pressure within the first volume is maintained constant while the first volume expands during a first interval, which ends when the first piston reaches the extremity of its motion. Thereafter, pressure entering the valve through the orifice increases abruptly and causes a second piston to move against the force of a spring due to the increased pressure force developed on the second piston after the first volume stops expanding. As the second piston moves the size of a second volume increases during a second interval until the second piston bottoms. When this occurs, the valve opens a connection between the first port and an outlet port through a bypass line in which there is no restriction.
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Braun Leslie A.
Campbell Christopher
Ford Motor Company
Harrington Donald J.
McKenzie Frank G.
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