US 2003/0111117 A1 · Valve arrangement including release valve · patentgrep

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Abstract

A valve arrangement including a release valve. The valve arrangement controls a cylinder assembly including a first port and a second port, and a cylinder slideably housing a piston for movement between an extended position and a retracted position. The valve arrangement includes a valve assembly in fluid communication with the source of fluid pressure and with the first port and the second port to control fluid flow between the source and the first port and second port, and a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port. The release valve is movable between a closed position and an open position. Fluid flows from both the first port and the second port simultaneously when the release valve member is in the open position.

Claims61

Dependent claims

A valve arrangement comprising:

a valve assembly in fluid communication with a source of fluid pressure and with a first port and a second port to control fluid flow between the source of fluid pressure and the first port and between the source of fluid pressure and the second port, fluid flow being prevented between the first port and the second port;
and
a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port.

A valve arrangement comprising:

a valve assembly in fluid communication with a source of fluid pressure and with a first port and a second port to control fluid flow between the source of fluid pressure and the first port and between the source of fluid pressure and the second port;
and
a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port, the release valve preventing fluid flow between the first port and the second port.

A valve arrangement comprising:

a valve assembly having a valve body including a valve bore in fluid communication with a source of fluid pressure and a the first port and a second port, the valve assembly controlling fluid flow between the source of fluid pressure and the first port and between the source of fluid pressure and the second port;
and
a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port, the release valve including
a release valve body including a release valve bore in fluid communication with the valve bore, the release valve body further including a release valve seat and a secondary release valve seat between the first port and the second port,
a release valve member movable between a closed position, in which the release valve member engages the release valve seat to prevent fluid flow through the release valve bore, and an open position, in which fluid flows from at least one of the first port and the second port, through the valve bore and through the release valve bore, and
a secondary release valve member movable between a closed position, in which the secondary release valve member engages the secondary release valve seat to prevent fluid flow between the first port and the second port, and an open position.

3 more elements

A valve arrangement comprising:

a valve assembly in fluid communication with a source of fluid pressure and with a first port and a second port to control fluid flow between the source of fluid pressure and the first port and between the source of fluid pressure and the second port;
and
a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port, the release valve including
a release valve body including a release valve bore in fluid communication with the first port and with the second port, the release valve body further including a release valve seat and a secondary release valve seat between the first port and the release valve bore,
a release valve member movable between a closed position, in which the release valve member engages the release valve seat to prevent fluid flow through the release valve bore, and an open position, and
a secondary release valve member movable between a closed position, in which the secondary release valve member engages the secondary release valve seat to prevent fluid flow between the first port and the release valve bore, and an open position, in which, when the release valve member is in the open position, fluid flows from the first port and through the release valve bore.

3 more elements

A valve arrangement comprising:

a valve assembly in fluid communication with a source of fluid pressure and with a first port and a second port to control fluid flow between the source of fluid pressure and the first port and between the source of fluid pressure and the second port, the valve assembly including
a first valve having a first valve body including a first valve bore in fluid communication with the source of fluid pressure and the first port, and
a second valve having a second valve body including a second valve bore in fluid communication with the source of fluid pressure and the second port;
and
a release valve fluidly connected to the first port and to the second port, the release valve being operable to control flow of fluid from the first port and from the second port, the release valve preventing flow between the first valve bore and the second valve bore, the release valve including
a release valve body including a release valve bore in fluid communication with the first valve bore and with the second valve bore, the release valve body further including a release valve seat and a secondary release valve seat between the first valve bore and the second valve bore,
a release valve member movable between a closed position, in which the release valve member engages the release valve seat to prevent fluid flow through the release valve bore, and an open position, and
a secondary release valve member movable between a closed position, in which the secondary release valve member engages the secondary release valve seat to prevent fluid flow between the first valve bore and the second valve bore, and an open position, in which, when the release valve member is in the open position, fluid flows from at least one of the first port, through the first valve bore, and the second port, through the second valve bore, and through the release valve bore.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/199,487Filed 19 Jul 2002
Priority: 13 Dec 1999
Published: 19 Jun 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F15B 11/0413
For controlling the speed: in one direction only, with no control in the reverse direction, e.g. check valve in parallel with a throttle valve
F15B 11/044
For controlling the speed: by means in the return line
F15B 13/01
Details of servomotor systems ; Valves for servomotor systems: locking-valves or other detent i.e. load-holding devices
F15B 2211/30515
Non-return valves, i.e. check valves: load holding valves

Family

Application09/460,443Division · filed 13 Dec 1999
Application10/199,487Division · filed 19 Jul 2002
US 6,477,937 B1Related patent
US 6,997,210 B2Related patent
US 2003/0111117 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

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