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US 4,518,011 AGranted
Control valve unit for the cylinder of a fluid actuator
OwnerKurt Stollinventor
Life of this patent
Estimating the term…
Abstract
A control valve cartridge which may be seated within the end plate of an actuator cylinder has a number of two way, two position solenoid valves placed in series axially and by way of which the space on each side of the piston may be connected by a respective control valve cartridge with a high pressure source or a low pressure source so as to give a programmable choke function.
Claims17
A valve arrangement for selectively providing fluid communication between a working chamber of a fluid actuated cylinder and a selected one of a pressurized fluid source and a fluid sink, comprising:
- a first valve mechanism which includes a plurality of two-way, two-position electromagnetic first valves which are connected in parallel with each other and which each include and control fluid flow through a respective throttled flow path;
- a second valve mechanism which includes second and third two-way, two-position electromagnetic valves which each have a first port which is in fluid communication through a distributor line with a first port of each said valve of said first valve mechanism and which each have a second port adapted to be connected to a respective one of the fluid source and fluid sink;
- and control circuit means for selectively actuating said valves, said control circuit means actuating only one of said valves of said second valve mechanism at any given time;
- wherein said valves of said first valve mechanism each have a second port adapted to be connected to a port of the fluid actuated cylinder;
- and wherein all of said valves are structurally identical and are parts of a single valve cartridge;
- whereby a piston movably supported in the working chamber of the cylinder moves at a speed which can be regulated by selectively actuating said valves of said first valve mechanism.
3 more elements
A valve cartridge, comprising:
- spaced first and second end members which each have a surface thereon;
- an adapter member disposed between and spaced from said first and second end members and having two surfaces on opposite sides thereof;
- a first valve, a second valve, and a plurality of third valves, each of said first, second and third valves including a valve housing having two surfaces on opposite sides thereof, including first and second connecting channels and a through channel which each extend through said valve housing from one to the other of said surfaces thereon, including a connecting duct extending between and communicating with said first and second connecting channels, including valve means for selectively facilitating and obstructing fluid flow through said connecting duct, and including throttle means for limiting the rate of fluid flow through said connecting duct to a predetermined value when said valve means is permitting fluid flow therethrough, wherein said first valve is disposed between said first end member and said adapter member and said surfaces on said first valve are respectively adjacent said surface on said first end member and one of said surfaces on said adapter member;
- means defining first and second passageways in said first end member which are respectively in fluid communication with said first connecting channel and said through channel in said first valve, wherein said second valve is disposed between said adapter member and said second end member and one of said surfaces on said second valve is adjacent one of said surfaces on said adapter member;
- means defining a first passageway in said adapter member which provides fluid communication between said second connecting channel in said first valve and said first connecting channel in said second valve and defining a second passageway in said adapter member which provides fluid communication between said through channel in said first valve and said second connecting channel in said second valve, wherein said plural third valves are disposed serially between said second valve and said second end member, two outermost said third valves each having one of said surfaces thereon adjacent a respective one of said surface on said second end member and one of said surfaces on said second valve, and the remainder of said surfaces on said third valves each being adjacent a said surface on an adjacent said third valve, said first and second connecting channels in said second valve respectively being aligned with said first and second connecting channels in said third valves, said second connecting channels in said third valves being in fluid communication with each other and said first connecting channels in said third valves being in fluid communication with each other and with said first connecting channel in said second valve;
- means for obstructing fluid communication between said second connecting channels in said second valve and the adjacent third valve;
- and means defining a passageway in said second end member which is in fluid communication with said second connecting channel in the third valve adjacent thereto.
4 more elements
Dependencies are inferred from the claim text.