Pull-type booster for vehicle

A pull-type booster for a vehicle comprising:

• (A) a main body having an internal space;
• (B) a movable body including a head portion and a cylindrical portion formed integrally with said head portion, said head portion being arranged in said internal space and partitioning said internal space into a lower pressure chamber at one side and a control chamber at another side, and said cylindrical portion projecting from said main body at said other side;
• (C) a through hole formed in said movable body;
• (D) a pull input means extending across said low pressure chamber and projecting through a seal means from said main body at said one side;
• (E) a plunger means arranged slidably in said through hole and combined with a head portion of said pull input means;
• (F) a valve means arranged in said through hole and operated by said plunger means for generating a pressure difference between said lower pressure chamber and said control chamber and moving said movable body in the direction of said lower pressure chamber;
• (G) a power transmission means arranged in an opening end portion of said through hole and engaged with said plunger means, said power transmission means includes a block fitted to said cylindrical portion of the movalbe body wherein a cylindrical support member is fixed to said block and a flexible boot covering said cylindrical portion of the movable body is anchored to said cylindrical support member at an end portion;
• (H) a pull ouput means engaged with said power transmission means and projecting outwards from said cylindrical portion of the movable body.

A pull-type booster for a vehicle comprising:

• (A) a main body having an internal space;
• (B) a movable body including a head portion and a cylindrical portion formed integrally with said head portion, being arranged in said internal space and partitioning said internal space into a lower pressure chamber at one side and a control chamber at another side;
• (C) a through hole formed in said movable body;
• (D) a pull input means extending across said low pressure chamber and projecting through a seal means from said main body at said one side;
• (E) a plunger means arranged slidably in said through hole and combined with a head portion of said pull input means;
• (F) a valve means arranged in said through hole and operated by said plunger means for generating a pressure difference between said lower pressure chamber and said control chamber and moving said movable body in the direction of said lower pressure chamber;
• (G) a power transmission means arranged in an opening end portion of said through hole and engaged with said plunger means;
• (H) a pull output means engaged with said power transmission means and projecting outwards from said cylindrical portion of the movable body;
• and
• (I) a thread formed in the circumference of said pull input means or pull output means, wherein an adjusting screw member is screwed to said thread and a wire connecting member, for fixing a wire, is engaged with said adjusting screw member.

A pull-type booster for a vehicle comprising:

• (A) a main body having an internal space;
• (B) a movable body including a head portion and a cylindrical portion formed integrally with said head portion, said head portion being arranged in said internal space with a lower pressure chamber at one side and a control chamber at another side, said said cylindrical portion projecting from said main body at said other side;
• (C) a through hole formed in said movable body;
• (D) a pull input means exending across said low pressure chamber and projecting through a seal means from said main body at said one side;
• (E) a plunger means arranged slidably in said through hole and combined with a head portion of said pull input means;
• (F) a valve means arranged in said through hole and operated by said plunger means for operating a pressure difference between said lower pressure chamber and said control chamber and moving said movable body in the direction of said lower pressure chamber;
• (G) a power transmission means arranged in an opening end portion of said through hole and engaged with said plunger means;
• (H) a pull output means engaged with said power transmission means and projecting outwards from said cylindrical portion of the movable body;
• and
• (I) a wire connected to said pull input means or said pull output means, and a generally U-shaped support member, for supporting a wire guide means of said wire, is fixed to said main body.