Throttle controlled transmission lockout

Details Throttle controlled transmission lockout Throttle controlled transmission lockout

1999-09-17

2001-04-24

Bucci, David A. (Department: 3682)

Machine element or mechanism

Control lever and linkage systems

Multiple controlling elements for single controlled element

C074S513000, C477S125000

Reexamination Certificate

active

06220112

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Technical Field
The subject invention relates to an assembly which protect transmissions from damage caused by changing gears when the throttle is out of the idle condition.
2. Description of the Prior Art
As is well known, transmissions can be damaged when shifted between gears while the engine is operating at a high rpm, i.e., the throttle is out of the idle position.
Many assemblies are known to prevent shifting of the transmission when the throttle is out of the idle position. Most of these assemblies are incorporated into the design of the throttle and transmission controls. One such system is shown in U.S. Pat. No. 5,063,817 to Bogert.
A pedal operated by an operator's foot is used to control engine speed on a boat whereas a hand control lever is used to shift the engine. In many instances, the foot throttle control operates independently of the shift control, making it possible to shift into gear at a high engine RPM, thereby causing damage to the engine transmission. There remains a need for a simple assembly which may be added to a wide variety of existing transmissions systems without modification to those systems.
SUMMARY OF THE INVENTION AND ADVANTAGES
An assembly for interconnecting the throttle and transmission whereby the transmission is locked in neutral for shifting from gear to gear unless the throttle is at idle.
The invention, therefore, provides a throttle controlled transmission lockout assembly for preventing shifting of the transmission above idle and comprising a slider member including an attachment for connecting the slider to a transmission control; and locking pin for engaging the slider member; an actuator responsive to the position of the throttle for moving the locking pin into engagement with the slider member. The slider member has first and second ends and a hole therein between the ends for receiving the locking pin when the slider member is in a neutral position coinciding with the neutral position of the transmission. The assembly is characterized by a guide member slidably supporting the slider member for rectilinear movement in response to movement of the transmission control.
Accordingly, the subject invention provides a lockout assembly which mechanically interconnects the foot throttle and the hand shift lever for preventing the operator from shifting into gear when the engine RPM is above idle. The lockout assembly may be used with any hand lever that has adequate space for the cable to be attached to the shift arm.


REFERENCES:
patent: 3741045 (1973-06-01), Kobayashi
patent: 3765261 (1973-10-01), Hobbins
patent: 4114738 (1978-09-01), Brown
patent: 4255984 (1981-03-01), Abels et al.
patent: 4608879 (1986-09-01), Ishida et al.
patent: 4986143 (1991-01-01), Livshits et al.
patent: 5063817 (1991-11-01), Bogert
patent: 5083951 (1992-01-01), Baba
patent: 5129494 (1992-07-01), Rolinski et al.
patent: 5193640 (1993-03-01), Lee
patent: 5309744 (1994-05-01), Kito et al.
patent: 5490585 (1996-02-01), Togano
patent: 5695429 (1997-12-01), Kataumi et al.
patent: 5797295 (1998-08-01), Kataumi et al.

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