Self-monitored fluid pressure booster system

Claim 2

A self-monitored fluid pressure booster device comprising: a. a body having a bore connectable to a fluid pressure operated mechanism and inlet port means and outlet port means connected to the bore; b. a shiftable sliding means in the bore having means to control fluid flow to and from said outlet and inlet port means in response to pressure in the fluid operated mechanism; c. pressure converter means associated with said sliding means to convert a high volume low pressure fluid flow into a low volume high pressure flow; d. said sliding means being mounted to shift from a first position in which the fluid control means directs the fluid flow from the inlet port into the mechanism to a second position in which the fluid control means directs the fluid flow from the inlet port through the pressure converter means to the mechanism and the outlet port means.

Claim 3

The device of claim 1 including means to return the sliding means from said second position to said first position.

Claim 4

The device of claim 2 in which the pressure converter means has a fluid passage therethrough to interconnect the return means with the area of boosted pressure.

Claim 5

The device of claim 2 in which the return means is biased to operate in response to a change in pressure in the fluid operated mechanism.

Claim 6

The device of claim 2 in which the return means is a spring and dashpot means cooperating with one end of the sliding means.

Claim 7

The device of claim 1 in which the pressure converter means is a turbine type pump and motor.

Claim 8

The device of claim 1 in which the pressure converter means is a volumetric type pump and motor.

Claim 9

The device of claim 7 in which the volumetric pump and motor are a gear pump and motor.

Claim 10

A self-monitored fluid pressure booster device comprising: a. a body having a bore with connection means at one end for connection to a fluid pressure operated mechanism, inlet port means and outlet port means in the body axially spaced along and communicating with the bore; b. a shiftable sliding means in the bore having pressure converter means mounted therein, the pressure converter means having a motor and pump, the sliding means having an outlet passage from the motor, a discharge passage communicating the pump to said connection means and an inlet passage connected to the motor and the pump; c. said sliding means being mounted for axial shifting along the bore from a first inactive position in which the inlet port means is connected for fluid to flow directly to the mechanism and the outlet passages are blocked to a second active position in which the inlet port means is aligned with the inlet passage and the outlet port means is aligned with the outlet passage so that fluid pressure in the inlet port means will cause fluid to flow through the inlet passage to both the motor and the pump, the motor driving the pump to create a zone of boosted pressure in the discharge passage, the shifting of the sliding means being a response to the pressure in said zone.

Claim 11

A self-monitored fluid pressure booster device comprising: a. a body having a bore with connection means at one end for connection to a fluid pressure operated mechanism, inlet port means and outlet port means in the body axially spaced along and communicating with the bore; b. a shiftable sliding means in the bore having pressure converter means mounted therein, the pressure converter means having a motor and pump, the sliding means having an outlet passage from the motor, a discharge passage communicating the pump to said connection means and an inlet passage connected to the motor and the pump; c. said sliding means being mounted for axial shifting along the bore from a first inactive position in which the inlet port means is connected for fluid to flow directly to the mechanism and the outlet passages are blocked to a second active position in which the inlet port means is aligned with the inlet passage and the outlet port means is aligned with the outlet passage so that fluid pressure in the inlet port means will cause fluid to flow through the inlet passage to both the motor and the pump, the motor driving the pump to create a zone of boosted pressure in the discharge passage, the shifting of the sliding means being a response to the pressure in said zone.

Claim 12

The device of claim 9 including means to return the sliding means from said second position to said first position.

Claim 13

The device of claim 10 in which the pressure converter means has a fluid passage therethrough to interconnect the return means with the area of boosted pressure.

Claim 14

The device of claim 10 in which the return means is biased to operate in response to a change in pressure in the fluid operated mechanism.

Claim 15

The device of claim 10 in which the return means is a spring and dashpot means cooperating with one end of the sliding means.

Claim 16

The device of claim 9 in which the pressure converter means is a turbine type pump and motor.

Claim 17

The device of claim 9 in which the pressure cOnverter means is a volumetric type pump and motor.

Claim 18

The device of claim 15 in which the volumetric type pump and motor is a gear pump and motor.

Claim 19

A self-monitored fluid pressure booster device comprising: a. a body having a circular bore with one end being open to present connection means to attach the body to a fluid pressure operated mechanism, an inlet port and an outlet port in the body axially spaced along and communicating with the bore; b. a cylindrical sliding means in the bore mounted for axial shifting, a pressure converter in the sliding means having a fluid operated motor directly connected to a fluid pump, an outlet passage from the motor, a discharge passage from the pump to the area of the connection means and an inlet passage connected to both the motor and the pump; c. a first shoulder on the sliding means adjacent the inlet passage and a second shoulder on the sliding means adjacent the outlet passage; d. the inlet and outlet ports in the body being positioned in relation to said shoulders so that in a first axially shifted position the first shoulder permits passage of fluid directly from the inlet port to the area of the connection means and the second shoulder blocks off the outlet passage and in a second axially shifted position the first shoulder blocks off direct fluid flow from the inlet port to the area of the connection means, directing the fluid flow from the inlet port to the inlet passage of the sliding means and the second shoulder is positioned to permit fluid flow from the outlet passage of the sliding means to the outlet port of the body; e. a cylindrical extension from the sliding means on the end opposite the pump, said extension being of smaller diameter than said first shoulder; f. a cylindrical cavity in the body positioned to receive said extension therein; g. sealing means between said extension and said cavity to define a dashpot to dampen the shifting of the sliding means; h. biasing means in said dashpot tending to return the sliding means to said first position upon a decrease in pressure in the area of said connection means.

Claim 20

A self-monitored fluid pressure booster device comprising: a. a body having a circular bore with one end being open to present connection means to attach the body to a fluid pressure operated mechanism, an inlet port and an outlet port in the body axially spaced along and communicating with the bore; b. a cylindrical sliding means in the bore mounted for axial shifting, a pressure converter in the sliding means having a fluid operated motor directly connected to a fluid pump, an outlet passage from the motor, a discharge passage from the pump to the area of the connection means and an inlet passage connected to both the motor and the pump; c. a first shoulder on the sliding means adjacent the inlet passage and a second shoulder on the sliding means adjacent the outlet passage; d. the inlet and outlet ports in the body being positioned in relation to said shoulders so that in a first axially shifted position the first shoulder permits passage of fluid directly from the inlet port to the area of the connection means and the second shoulder blocks off the outlet passage and in a second axially shifted position the first shoulder blocks off direct fluid flow from the inlet port to the area of the connection means, directing the fluid flow from the inlet port to the inlet passage of the sliding means and the second shoulder is positioned to permit fluid flow from the outlet passage of the sliding means to the outlet port of the body; e. a cylindrical extension from the sliding means on the end opposite the pump, said extension being of smaller diameter than said first shoulder; f. a cylindrical cavity in the body positioned to receive said extension therein; g. sealing means between said extension and said cavity to define a dashpot to dampen the shifting of the sliding means; h. biasing means in said dashpot tending to return the sliding means to said first position upon a decrease in pressure in the area of said connection means.

Claim 21

The device of claim 17 in which the pressure converter means is a turbine type pump and motor.

Claim 22

The device of claim 17 in which the pressure converter means is a volumetric type pump and motor.

Claim 23

The device of claim 19 in which the volumetric type pump and motor is a gear pump and motor.

Claim 24

The device of claim 1 in which the pressure converter means is located within said shiftable sliding means.