Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Reexamination Certificate
1999-10-29
2001-05-08
Marmor, Charles A (Department: 3681)
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
C074S473320
Reexamination Certificate
active
06227067
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to controls for X-Y shifters and, in particular, to controls for X-Y shifters utilizing independent and occasionally simultaneous control of the motors used to control the X—X and Y—Y shift positions.
2. Description of the Prior Art
Change-gear transmissions and so-called X-Y shifting devices therefor are well known in the prior art. Briefly, X-Y shifters are devices which control the X—X (or selection directional) and the Y—Y (or engage
ot-engaged directional) position of a shift member, such as a shift finger or the like. Typically, two separate fluid or electric motors are used to control the X—X and Y—Y positions.
The X-Y shifters are mounted to the transmission and are manually controlled as “shift-by-wire” slave devices or are under the control of a system controller of a fully or partially automated transmission system.
X-Y shifters may be seen by reference to U.S. Pat. Nos. 4,621,328; 4,784,007; 4,796,485; 4,817,468; 4,821,590 and 4,873,590, the disclosures of which are incorporated herein by reference.
The current X-Y shifters use discreet, single-action controls which limit positioning of the shift member to only one axis at a time and require delays for coast-down, stopping and centering functions. This may result in shifts which are more time-consuming than desirable.
SUMMARY OF THE INVENTION
In accordance with the present invention, the drawbacks of the prior art are minimized or overcome by the provision of a control for an X-Y shifter which will allow quicker completion of shifts.
The foregoing is accomplished by providing independent controls for each of the X-Y shifter motors, which allows initiation of a required X—X movement as the Y—Y position comes within a given range of its target position and allows initiation of a required Y—Y movement as the X—X position is sensed as coming within a given range of its target position.
Accordingly, it is an object of the present invention to provide an improved X-Y shifter controller allowing quicker shift response.
This and other objects and advantages of the present invention will become apparent from a reading of the following description of the preferred embodiment taken in connection with the attached drawings.
REFERENCES:
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patent: 4718307 (1988-01-01), Yabe et al.
patent: 4784007 (1988-11-01), Ishida et al.
patent: 4796485 (1989-01-01), Ebina
patent: 4817468 (1989-04-01), Leigh-Monstevens
patent: 4821590 (1989-04-01), Tury et al.
patent: 4873881 (1989-10-01), Edelen et al.
patent: 5035113 (1991-07-01), Simonyi et al.
patent: 5243871 (1993-09-01), Weiten
patent: 6145398 (2000-11-01), Bansbach et al.
Oliver Kurt H.
Steeby Jon A.
Eaton Corporation
Gordon Howard D.
Marmor Charles A
Rodriguez Saul
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