Joseph J Reilly

US Patent:

8104511, Jan 31, 2012

Filed:

Aug 26, 2008

Appl. No.:

12/229741

Inventors:

Joseph Patrick Reilly - Lincolnshire IL, US

Assignee:

Parker Hannifin Corporation - Cleveland OH

International Classification:

F16K 31/06

US Classification:

13762565, 13762567, 13762568

Abstract:

A sequential stepped directional control valve accepts pressurized hydraulic fluid from a pressure port, and directs that pressurized fluid to a first stage port, or to both a first stage port and a second stage port. In the neutral position, the valve blocks the flow of pressurized hydraulic fluid into the valve. In the first stage position, pressurized hydraulic fluid flows into the valve and is directed by the valve to the first stage port, however, the fluid flow to the second stage port is blocked. In the second stage position, pressurized hydraulic fluid flows into the valve and is directed to both the first and second stage ports. When the valve transitions from the first stage position to the second stage position, the valve does not cycle through a neutral position, and the flow of pressurized hydraulic fluid to the first stage port is uninterrupted.

US Patent:

8272402, Sep 25, 2012

Filed:

Dec 27, 2011

Appl. No.:

13/374407

Inventors:

Joseph Patrick Reilly - Lincolnshire IL, US

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F16K 31/06

US Classification:

13762565, 13762567, 13762568, 25112915

Abstract:

A sequential stepped directional control valve accepts pressurized hydraulic fluid from a pressure port, and directs that pressurized fluid to a first stage port, or to both a first stage port and a second stage port. In the neutral position, the valve blocks the flow of pressurized hydraulic fluid into the valve. In the first stage position, pressurized hydraulic fluid flows into the valve and is directed by the valve to the first stage port, however, the pressurized fluid flow to the second stage port is blocked. In the second stage position, pressurized hydraulic fluid flows into the valve and is directed to both the first and second stage ports. When the valve transitions from the first stage position to the second stage position, the valve does not cycle through a neutral position, and the flow of pressurized hydraulic fluid to the first stage port is uninterrupted.