Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A vehicle braking system including a pneumatic booster which includes a shell casing (1), a flexible diaphragm (5), a power piston (4) connected to the diaphragm to define a constant pressure chamber (A) and a variable pressure chamber (B) in the shell casing, an input shaft (33), a valve mechanism (35-37) provided in the power piston and associated with the input shaft to control the pressure in the variable pressure chamber, an output shaft (22) receiving the output force from the power piston, and a reaction mechanism (21) for transmitting reaction force of the output shaft to the input shaft, characterised in that the booster further comprises a control chamber (11), and a control piston (13) partitioning the interior of the control chamber into a second constant pressure chamber (c) and a second variable pressure chamber (D), said control piston being associated with the input shaft such that the control piston applies a force on the input shaft in the brake applying direction when the control piston is displaced by receiving the differential pressure between two second chambers (C, D).
Claim 2
Dependent Claim
180 words
A vehicle braking system including a pneumatic booster which includes a shell casing (1), a flexible diaphragm (5), a power piston (4) connected to the diaphragm to define a constant pressure chamber (A) and a variable pressure chamber (B) in the shell casing, an input shaft (33), a valve mechanism (35-37) provided in the power piston and associated with the input shaft to control the pressure in the variable pressure chamber, an output shaft (22) receiving the output force from the power piston, and a reaction mechanism (21) for transmitting reaction force of the output shaft to the input shaft, characterised in that the booster further comprises a control chamber (11), and a control piston (13) partitioning the interior of the control chamber into a second constant pressure chamber (c) and a second variable pressure chamber (D), said control piston being associated with the input shaft such that the control piston applies a force on the input shaft in the brake applying direction when the control piston is displaced by receiving the differential pressure between two second chambers (C, D).
Claim 3
Dependent Claim
41 words
A vehicle braking system according to claim 1, characterised in that the control chamber (11) is formed in the power piston (4), and a second flexible diaphragm (12) cooperates with the control piston to partition the interior of the control chamber.
Claim 4
Dependent Claim
29 words
A vehicle braking system according to claim 1, characterised in that a control device (53, 65) is provided to control the pressure in the second variable pressure chamber (D).
Claim 5
Dependent Claim
24 words
A vehicle braking system according to claim 3, characterised in that a manually operable switch is provided to control the control device (53, 65).
Claim 6
Dependent Claim
51 words
A vehicle braking system according to claim 3, characterised in that the control device (53, 65) receives signals representing operating condition of vehicle such as vehicle speed signal E, gas pedal actuating signal F, hand brake operating signal G, vehicle weight signal H, seat belt fitting signal J and the like.