초록 ▼

A parking brake and transmission interlock system including a transmission control element (30) movable between at least two opposed drive positions and an intermediate neutral position, a parking brake control element (14-22) movable between engaged and disengaged positions, a stop (36) having two

A parking brake and transmission interlock system including a transmission control element (30) movable between at least two opposed drive positions and an intermediate neutral position, a parking brake control element (14-22) movable between engaged and disengaged positions, a stop (36) having two stop surfaces (38,40) connected to the transmission control element (30), to be movable therewith between the drive and neutral positions, a pair of movably mounted abutments (52,56) each confronting a respective one of the stop surfaces (38,40) and engageable therewith, a spring (58) biasing each of the abutments (52,56) toward its associated stop surface (38,40) to engage the same and urge the stop (36) toward the neutral position, and a fluid motor (64) responsive to the positioning of the brake control element (14-22) in the disengaged position for moving the abutments (52,56) away from the associated stop surfaces (38,40) so that the transmission control element (30) may be freely moved between the drive and neutral positions.

대표청구항 ▼

A parking brake and transmission interlock system comprising: a transmission control element (30) movable in a path between at least two opposed drive positions and an intermediate neutral position; a parking brake control system including a fluid motor (16) having an output element movable between

A parking brake and transmission interlock system comprising: a transmission control element (30) movable in a path between at least two opposed drive positions and an intermediate neutral position; a parking brake control system including a fluid motor (16) having an output element movable between engaged and disengaged positions; a stop collar (36) rigidly mounted on said transmission control element (30) and having opposed stop surfaces (38,40); a pair of bellcranks (46,48) each pivotally mounted intermediate their ends and having first arms (50,54) continuously located in the path of movement of said stop collar (36) and facing a corresponding one of said stop surfaces (38,40) and second arms (60,62) in substantial abutment with said fluid motor output element (68); and a tension spring (58) interconnecting said first arms (50,54) to bias the same against said stop surfaces (38,40) to urge said stop collar (36) and said transmission control element (30) to said neutral position; said fluid motor output element (68), when in said disengaged position, driving said bellcranks (46, 48) against the bias of said spring (58) to positions wherein said first legs (50,54) are spaced to allow said collar (36) to move freely between said drive and neutral positions, and when in said engaged position, allowing said spring (58) to engage said first legs (50,54) with said stop surfaces (38,40).