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US 5,465,817 AGranted
Hydraulic brake pump with eccentric cam and reciprocating piston
OwnerRalph P. Muscatellinventor
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OwnerRalph P. Muscatellinventor
Estimating the term…
A hydraulic brake coupled to a rotary shaft including a hydraulic pump connected to the shaft, the pump having a pump inlet, and a pump outlet, a hydraulic loop having an inlet part connected to the pump outlet and an outlet part connected to the pump inlet, a flow control device positioned in the hydraulic loop between the inlet outlet parts for controlling flow of hydraulic fluid in the hydraulic loop, and a brake actuator connected to the flow control device for reducing the flow of hydraulic fluid in response to operation of the brake actuator. There is provided a hydraulic brake wherein the hydraulic pump includes a pump cylinder with a pump piston in the pump cylinder, a one way inlet valve in the pump cylinder fluidly communicating with the hydraulic loop outlet part, a one way outlet valve in the pump cylinder fluidly communicating with the hydraulic inlet part, reciprocating device in operative engagement with the pump piston for reciprocatingly moving the pump piston in the pump cylinder, the reciprocating device coupled to the rotary shaft. The hydraulic brake includes a camshaft, at least one cam on the cam shaft in operative engagement with the pump piston for driving the pump piston into the pump cylinder with each revolution of the camshaft, and hydraulic fluid bias pressure supply device for applying fluid bias pressure to the hydraulic fluid in fluid communication with the hydraulic loop outlet part.
A hydraulic brake coupled to a rotary shaft, comprising a hydraulic piston pump connected to the shaft, the pump having a pump inlet, and pump outlet, a hydraulic loop having an inlet part connected to said pump outlet and an outlet part connected to said pump inlet, flow control means disposed in said hydraulic loop between said inlet part and said outlet part for controlling flow of hydraulic fluid in said hydraulic loop, and a brake actuator connected via brake connecting means to the flow control means for controlling the flow of hydraulic fluid in response to operation of said brake actuator the hydraulic pump including at least one pump cylinder, said pump piston being in said pump cylinder, a one way inlet valve in said pump cylinder fluidly communicating with said hydraulic loop outlet part, a one way outlet valve in said pump cylinder fluidly communicating with said hydraulic loop inlet part, reciprocating means in operative engagement with said pump piston for reciprocatingly moving said pump piston in said pump cylinder, the reciprocating means being coupled to the rotary shaft, the reciprocating means including a camshaft, at least one eccentric cam on said camshaft in operative engagement with said pump piston for reciprocatingly moving said pump piston in said pump cylinder.
A hydraulic brake system comprising a plurality of hydraulic brakes, each coupled to a respective rotary shaft, each hydraulic brake comprising a hydraulic pump connected to the respective shaft, the pump having a pump inlet, and pump outlet, a hydraulic loop having an inlet part connected to said pump outlet and an outlet part connected to said pump inlet, flow control means disposed in each hydraulic loop between said inlet part and said outlet part for controlling flow of hydraulic fluid in said hydraulic loop, and a brake actuator connected via brake connecting means to each flow control means for controlling flow of hydraulic fluid in response to operation of said brake actuator, a flow control cylinder in each flow control means, a flow control piston in each of said flow control cylinders in operative engagement with each flow control means, wherein said brake connecting means include a hydraulic brake master cylinder, a brake master piston slidably disposed in said brake master cylinder in operative engagement with each flow control piston, and a plurality of hydraulic brake lines fluidly connecting said brake master cylinder with a respective flow control cylinder for actuating a respective flow control piston in response to operation of said brake actuator, wherein said plurality of hydraulic brake lines are mutually fluidly communicating via the intermediary of said master cylinder for equalizing fluid pressure in all of said flow control cylinders each of the respective hydraulic pumps being of the type including a hydraulic pump piston, pump cylinder, eccentric cam and camshaft with the hydraulic pump piston being in operative engagement with the camshaft for reciprocatingly moving said pump piston in said pump cylinder.
Dependencies are inferred from the claim text.