Portless type master cylinder device with intake valve and flow resisting means between pressure chamber and reservoir chamber

Patent · Tue Jun 28 00:00:00 EDT 1988

OSTI ID:7047611

Nomura, Y; Sakamoto, S

A portless type master cylinder device is described for optionally transferring a hydraulic liquid between a reservoir for the hydraulic fluid and a hydraulic actuator, comprising: a piston body formed with a cylinder bore; a piston member slidably fitted in the cylinder bore so as to define a pressure chamber on a first axial side thereof and a reservoir connection chamber on a second axial side thereof opposite to the first axial side and to be axially moveable away from a determinate initial axial position thereof in a first direction oriented from the reservoir connection chamber toward the pressure chamber and back to the initial axial position in a second direction opposite to the first direction, and reservoir connection chamber being constantly in free communication with the reservoir; a stop means for restraining the piston member from moving beyond the initial axial position in the second direction; and an intake valve incorporated in the piston member and adapted to be actuated by the stop means when and only when the piston member is within a close vicinity of the initial axial position so as to open a substantially throttled passage communicating the pressure chamber with the reservoir connection chamber, the passage being so throttled as to dynamically hold a normal actuating pressure for the hydraulic actuator in the pressure chamber.

• Assignee: Toyota Jidosha Kabushiki Kaisha
• Patent Number(s): US 4753075
• OSTI ID: 7047611
• Resource Relation: Patent File Date: Filed date 15 Oct 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
CYLINDERS
ACCUMULATORS
ACTUATORS
HYDRAULIC EQUIPMENT
HYDRAULIC FLUIDS
PISTONS
PRESSURE CONTROL
VALVES
CONTAINERS
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUIDS
HEAT ENGINES
TANKS
WORKING FLUIDS
330100* - Internal Combustion Engines