Deceleration and pressure sensitive proportioning valve

Claim 2

In an incompressible fluid proportioning valve assembly for a vehicle having an inlet communicating with a fluid pressure source and an outlet communicating with a brake assembly, an incompressible fluid pressure responsive assembly cooperating with the inlet and the outlet to vary fluid communication therebetween in response to pressurized fluid communicated to the inlet, and an inertia sensing mass responsive to deceleration of the vehicle and cooperating with the incompressible fluid pressure responsive assembly to assist in the variation of fluid communication between the inlet and outlet, the improvement comprising a channel communicating with the pressure responsive assembly and a fluid reservoir, and valve means disposed in said channel and engaged by said inertia sensing mass, the inertia sensing mass being responsive to deceleration of the vehicle to effect operation of said valve means to prevent fluid communication with the reservoir through the channel and thereby cooperate with the pressure responsive assembly in the variance of fluid communicated to said outlet.

Claim 3

The proportioning valve assembly in accordance with claim 1, wherein said inertia sensing mass comprises an annular object and said valve means comprises a tilt valve, so that deceleration of the vehicle causes said annular object to move away from said tilt valve and permit closure thereof.

Claim 4

The proportioning valve assembly in accordance with claim 1, further comprising a master cylinder body, the proportioning valve assembly being disposed within said body.

Claim 5

In a proportioning valve assembly for a vehicle having an inlet communicating with a fluid pressure source and an outlet communicating with a brake assembly, a pressure responsive assembly cooperating with the inlet and the outlet to vary fluid communication therebetween in response to pressurized fluid communicated to the inlet, and an inertia-sensing mass responsive to deceleration of the vehicle and cooperating with the pressure responsive assembly to assist in the variation of fluid communication between the inlet and outlet, the improvement comprising a channel communicating with the pressure responsive assembly and a fluid reservoir, valve means disposed in said channel and engaged by said inertia-sensing mass, the inertia-sensing mass being responsive to deceleration of the vehicle to effect operation of said valve means to prevent fluid communication with the reservior through the channel and thereby cooperate with the pressure responsive assembly in the variance of fluid communicated to said outlet, the pressure responsive assembly including in a bore of the assembly a differential piston, a second piston located for movement relative to the differential piston and having an interior cavity, and poppet valve means disposed within the interior cavity.

Claim 6

In a proportioning valve assembly for a vehicle having an inlet communicating with a fluid pressure source and an outlet communicating with a brake assembly, a pressure responsive assembly cooperating with the inlet and the outlet to vary fluid communication therebetween in response to pressurized fluid communicated to the inlet, and an inertia-sensing mass responsive to deceleration of the vehicle and cooperating with the pressure responsive assembly to assist in the variation of fluid communication between the inlet and outlet, the improvement comprising a channel communicating with the pressure responsive assembly and a fluid reservoir, valve means disposed in said channel and engaged by said inertia-sensing mass, the inertia-sensing mass being responsive to deceleration of the vehicle to effect operation of said valve means to prevent fluid communication with the reservior through the channel and thereby cooperate with the pressure responsive assembly in the variance of fluid communicated to said outlet, the pressure responsive assembly including in a bore of the assembly a differential piston, a second piston located for movement relative to the differential piston and having an interior cavity, and poppet valve means disposed within the interior cavity.

Claim 7

The proportioning valve assembly in accordance with claim 1, wherein said inertia sensing mass comprises an annular object.

Claim 8

The proportioning valve assembly in accordance with claim 5, wherein said valve means comprises a spring that biases seat closure means toward a valve seat in said channel and against a pin engaging said annular object.

Claim 9

The proportioning valve assembly in accordance with claim 5, wherein said valve means comprises a buoyant object separated from a valve seat in said channel by a pin engaging said annular object.

Claim 10

The proportioning valve assembly in accordance with claim 4, wherein said second piston extends into said channel and is responsive to operation of said valve means.

Claim 11

The proportioning valve assembly in accordance with claim 4, further comprising a tube seat housing containing said pistons and poppet valve means, to provide a removable cartridge assembly.

Claim 12

The proportioning valve assembly in accordance with claim 4, wherein the differential and second pistons are disposed opposite one another with the poppet valve means extending from said second piston toward said differential piston.

Claim 13

The proportioning valve assembly in accordance with claim 4, wherein the second piston is disposed within an opening in said differential piston and the poppet valve means extends from said opening toward said outlet.

Claim 14

The proportioning valve assembly in accordance with claim 4, further comprising a spring biasing said poppet valve means toward said outlet, resilient means acting on said second piston, and spring means biasing said differential piston toward an end of said bore.

Claim 15

The proportioning valve assembly in accordance with claim 12, wherein said resilient means biases said second piston away from said channel.

Claim 16

The proportioning valve assembly in accordance with claim 8, wherein the second piston sealingly encloses said channel and is biased away from said channel by resilient means.

Claim 17

The proportioning valve assembly in accordance with claim 13, further comprising an intermediate member disposed between said spring means and differential piston, the intermediate member having a hole communicating with said interior cavity.

Claim 18

The proportioning valve assembly in accordance with claim 4, wherein said inertia-sensing mass comprises an annular object and said valve means comprises a tilt valve, so that deceleration of the vehicle causes said annular object to move away from said tilt valve and permit closure thereof.

Claim 19

The proportioning valve assembly in accordance with claim 4, further comprising a master cylinder body, the proportioning valve assembly being disposed within said body.

Claim 20

The proportioning valve assembly in accordance with claim 4, wherein said inertia-sensing mass comprises an annular object.

Claim 21

The proportioning valve assembly in accordance with claim 18, wherein said valve means comprises a spring that biases seat closure means toward a valve seat in said channel and against a pin engaging said annular object.

Claim 22

The proportioning valve assembly in accordance with claim 18, wherein said valve means comprises a buoyant object separated from a valve seat in said channel by a pin engaging said annular object.

Claim 23

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a differential piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, a second piston disposed within said housing and movable relative to said differential piston, said second piston having an interior cavity, poppet valve means disposed within the interior cavity of said second piston and extendable therefrom, channel means for connecting the inside of said housing with a fluid reservoir, second valve means disposed in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object being responsive to deceleration of the vehicle to permit said second valve means to close to prevent fluid communication with said reservoir and thereby cooperate in reducing the pressure at said outlet.

Claim 24

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a differential piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, a second piston disposed within said housing and movable relative to said differential piston, said second piston having an interior cavity, poppet valve means disposed within the interior cavity of said second piston and extendable therefrom, channel means for connecting the inside of said housing with a fluid reservoir, second valve means disposed in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object being responsive to deceleration of the vehicle to permit said second valve means to close to prevent fluid communication with said reservoir and thereby cooperate in reducing the pressure at said outlet.

Claim 25

The pressure reducing valve assembly in accordance with claim 21, wherein said housing comprises a master cylinder housing.

Claim 26

The pressure reducing valve assembly in accordance with claim 21, wherein the inertia sensitive object is disposed within said reservoir and deceleration causes said object to move away from said second valve means.

Claim 27

The pressure reducing valve assembly in accordance with claim 21, wherein said second valve means comprises a tilt valve biased in an open position by said inertia sensitive object when said vehicle is not decelerating.

Claim 28

The pressure reducing valve assembly in accordance with claim 21, wherein said valve assembly is responsive to unloaded and loaded conditions of said vehicle by means of said second valve means and inertia sensitive object.

Claim 29

The pressure reducing valve assembly in accordance with claim 21, wherein said second valve means comprises a spring that biases seat closure means toward a valve seat in said channel means and against a pin engaging said object.

Claim 30

The pressure reducing valve assembly in accordance with claim 21, wherein said second valve means comprises a buoyant object separated from a valve seat in said channel means by a pin engaging said object.

Claim 31

The pressure reducing valve assembly in accordance with claim 21, wherein said second piston extends into said channel means and is responsive to operation of said second valve means.

Claim 32

The pressure reducing valve assembly in accordance with claim 21, further comprising a tube seat housing containing said pistons and poppet valve means, to provide a removable cartridge assembly.

Claim 33

The pressure reducing valve assembly in accordance with claim 21, wherein the differential and second pistons are disposed opposite one another with the poppet valve means extending from said second piston toward said differential piston.

Claim 34

The pressure reducing valve assembly in accordance with claim 21, wherein the second piston is disposed within an opening in said differential piston and the poppet valve means extends from said opening toward said outlet.

Claim 35

The pressure reducing valve assembly in accordance with claim 21, further comprising a spring biasing said poppet valve means toward said outlet, resilient means acting on said second piston, and spring means biasing said differential piston toward an end of said housing.

Claim 36

The pressure reducing valve assembly in accordance with claim 32, wherein said resilient means biases said second piston away from said channel means.

Claim 37

The pressure reducing valve assembly in accordance with claim 28, wherein the second piston sealingly encloses said channel means and is biased away from said channel means by resilient means.

Claim 38

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a first piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, spring means biasing said first piston toward an end of said housing, a second piston disposed within said housing and movable relative to said first piston, said second piston having an interior cavity, resilient means acting on said second piston, poppet valve means disposed within the interior cavity of said second piston and extendable therefrom, a spring biasing said poppet valve means toward said outlet, channel means for connecting the inside of said housing with a fluid reservoir, second valve means disposed in said channel and including a spring that biases seat closure means toward a valve seat in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object disposed within said reservoir and decelertion causing said object to move away from said second valve means which closes to prevent fluid communication with said reservoir and thereby cooperate in reducing pressure at said outlet, the valve assembly being responsive to unloaded and loaded conditions of said vehicle by means of said second valve means and inertia sensitive object.

Claim 39

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a first piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, spring means biasing said first piston toward an end of said housing, a second piston disposed within said housing and movable relative to said first piston, said second piston having an interior cavity, resilient means acting on said second piston, poppet valve means disposed within the interior cavity of said second piston and extendable therefrom, a spring biasing said poppet valve means toward said outlet, channel means for connecting the inside of said housing with a fluid reservoir, second valve means disposed in said channel and including a spring that biases seat closure means toward a valve seat in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object disposed within said reservoir and decelertion causing said object to move away from said second valve means which closes to prevent fluid communication with said reservoir and thereby cooperate in reducing pressure at said outlet, the valve assembly being responsive to unloaded and loaded conditions of said vehicle by means of said second valve means and inertia sensitive object.

Claim 40

In a proportioning valve assembly for a vehicle having an inlet communicating with a fluid pressure source and an outlet communicating with a brake assembly, a pressure responsive assembly cooperating with the inlet and the outlet to vary fluid communication therebetween in response to pressurized fluid communicated to the inlet, and an inertia-sensing mass responsive to deceleration of the vehicle and cooperating with the pressure responsive assembly to assist in the variation of fluid communication between the inlet and outlet, the improvement comprising a channel communicating with the pressure responsive assembly and a fluid-containing chamber, valve means disposed in said channel and engaged by said inertia-sensing mass, the inertia-sensing mass being responsive to deceleration of the vehicle to effect operation of said valve means to prevent fluid communication with the fluid-containing chamber through the channel and thereby cooperate with the pressure responsive assembly in the variance of fluid communicated to said outlet, the pressure responsive assembly including in a bore of the assembly a differential piston, a second piston located for movement relative to the differential piston, and poppet valve means disposed for movement relative to the differential piston.

Claim 41

In a proportioning valve assembly for a vehicle having an inlet communicating with a fluid pressure source and an outlet communicating with a brake assembly, a pressure responsive assembly cooperating with the inlet and the outlet to vary fluid communication therebetween in response to pressurized fluid communicated to the inlet, and an inertia-sensing mass responsive to deceleration of the vehicle and cooperating with the pressure responsive assembly to assist in the variation of fluid communication between the inlet and outlet, the improvement comprising a channel communicating with the pressure responsive assembly and a fluid-containing chamber, valve means disposed in said channel and engaged by said inertia-sensing mass, the inertia-sensing mass being responsive to deceleration of the vehicle to effect operation of said valve means to prevent fluid communication with the fluid-containing chamber through the channel and thereby cooperate with the pressure responsive assembly in the variance of fluid communicated to said outlet, the pressure responsive assembly including in a bore of the assembly a differential piston, a second piston located for movement relative to the differential piston, and poppet valve means disposed for movement relative to the differential piston.

Claim 42

The proportioning valve assembly in accordance with claim 36, wherein said inertia-sensing mass comprises an annular object and said valve means comprises a tilt valve, so that deceleration of the vehicle causes said annular object to move away from said tilt valve and permit closure thereof.

Claim 43

The proportioning valve assembly in accordance with claim 36, further comprising a master cylinder body, the proportioning valve assembly being disposed within said body.

Claim 44

The proportioning valve assembly in accordance with claim 36, wherein said inertia-sensing mass comprises an annular object.

Claim 45

The proportioning valve assembly in accordance with claim 39, wherein said valve means comprises a spring that biases seat closure means toward a valve seat in said channel and against a pin engaging said annular object.

Claim 46

The proportioning valve assembly in accordance with claim 39, wherein said valve means comprises a buoyant object separated from a valve seat in said channel by a pin engaging said annular object.

Claim 47

The proportioning valve assembly in accordance with claim 36, wherein said second piston extends into said channel and is responsive to operation of said valve means.

Claim 48

The proportioning valve assembly in accordance with claim 42, wherein the second piston sealingly encloses said channel and is biased away from said channel by resilient means.

Claim 49

The proportioning valve assembly in accordance with claim 36, further comprising a tube seat housing containing said pistons and poppet valve means, to provide a removable cartridge assembly.

Claim 50

The proportioning valve assembly in accordance with claim 36, wherein the differential and second pistons are disposed opposite one another with the poppet valve means extending from said second piston toward said differential piston.

Claim 51

The proportioning valve assembly in accordance with claim 36, wherein the second piston is disposed within an opening in said differential piston and the poppet valve means extends toward said outlet.

Claim 52

The proportioning valve assembly in accordance with claim 36, further comprising a spring biasing said poppet valve means toward said outlet, resilient means acting on said second piston, and spring means biasing said differential piston toward an end of said bore.

Claim 53

The proportioning valve assembly in accordance with claim 46, wherein said resilient means biases said second piston away from said channel.

Claim 54

The proportioning valve assembly in accordance with claim 48, wherein the second piston has an interior cavity with the poppet valve means disposed therein.

Claim 55

The proportioning valve assembly in accordance with claim 48, further comprising an intermediate member disposed between said spring means and differential piston, the intermediate member having a hole communicating with said interior cavity.

Claim 56

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a differential piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, a second piston disposed within said housing and movable relative to said differential piston, poppet valve means disposed in the housing for movement relative to the differential piston, channel means for connecting the inside of said housing with a fluid-containing chamber, second valve means disposed in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object being responsive to deceleration of the vehicle to permit said second valve means to close to prevent fluid communication with said fluid-containing chamber and thereby cooperate in reducing the pressure at said outlet.

Claim 57

A pressure reducing valve assembly for a vehicle braking system, comprising a housing having an inlet and an outlet, a differential piston in said housing and subject to inlet and outlet pressures so that the valve assembly provides a pressure at said outlet reduced from the pressure at said inlet, a second piston disposed within said housing and movable relative to said differential piston, poppet valve means disposed in the housing for movement relative to the differential piston, channel means for connecting the inside of said housing with a fluid-containing chamber, second valve means disposed in said channel means, and an inertia sensitive object engaging said second valve means, the inertia sensitive object being responsive to deceleration of the vehicle to permit said second valve means to close to prevent fluid communication with said fluid-containing chamber and thereby cooperate in reducing the pressure at said outlet.

Claim 58

The pressure reducing valve assembly in accordance with claim 51, wherein said housing comprises a master cylinder housing.

Claim 59

The pressure reducing valve assembly in accordance with claim 51, wherein the inertia sensitive object is disposed within said fluid-containing chamber and deceleration causes said object to move away from said second valve means.

Claim 60

The pressure reducing valve assembly in accordance with claim 51, wherein said second valve means comprises a tilt valve biased in an open position by said inertia sensitive object when said vehicle is not decelerating.

Claim 61

The pressure reducing valve assembly in accordance with claim 51, wherein said valve assembly is responsive to unloaded and loaded conditions of said vehicle by means of said second valve means and inertia sensitive object.

Claim 62

The pressure reducing valve assembly in accordance with claim 51, wherein said second valve means comprises a spring that biases seat closure means toward a valve seat in said channel means and against a pin engaging said object.

Claim 63

The pressure reducing valve assembly in accordance with claim 51, wherein said second valve means comprises a buoyant object separated from a valve seat in said channel means by a pin engaging said object.

Claim 64

The pressure reducing valve assembly in accordance with claim 51, wherein said second piston extends into said channel means and is responsive to operation of said second valve means.

Claim 65

The pressure reducing valve assembly in accordance with claim 58, wherein the second piston sealingly encloses said channel means and is biased away from said channel means by resilient means.

Claim 66

The pressure reducing valve assembly in accordance with claim 51, further comprising a tube seat housing containing said pistons and poppet valve means, to provide a removable cartridge assembly.

Claim 67

The pressure reducing valve assembly in accordance with claim 51, wherein the differential and second pistons are disposed opposite one another with the poppet valve means extending from said second piston toward said differential piston.

Claim 68

The prssure reducing valve assembly in accordance with claim 51, wherein the second piston is disposed within an opening in said differential piston and the poppet valve means extends toward said outlet.

Claim 69

The pressure reducing valve assembly in accordance with claim 51, further comprising a spring biasing said poppet valve means toward said outlet, resilient means acting on said second piston, and spring means biasing said differential piston toward an end of said housing.

Claim 70

The pressure reducing valve assembly in accordance with claim 63, wherein said resilient means biases said second piston away from said channel means.

Claim 71

The pressure reducing valve assembly in accordance with claim 51, wherein said second piston includes an interior cavity and said poppet valve means is disposed within the interior cavity of said second piston and extendible therefrom.