Hydraulic main valve and auxiliary valve

• US 8,905,077 B2
• Filed: 06/23/2010
• Issued: 12/09/2014
• Est. Priority Date: 06/24/2009
• Status: Active Grant

• Current Assignee: Nordhydraulic AB (HYDAC International GmbH)
• Original Assignee: Nordhydraulic AB (HYDAC International GmbH)
• Inventors: Lundgren, Bertil
• Primary Examiner(s): Hepperle, Stephen M
• Assistant Examiner(s): MACKAY-SMITH, SETH WENTWORTH
• Application Number:
  US13/378,399
• Publication Number:
  US 20120125459A1
• Time in Patent Office: 1,630 Days
• Field of Search: 137/884, 137/561.A, 137/561.R
• US Class Current: 137/625.2
• CPC Class Codes: E02F 3/96 with arrangements for alternate or simultaneous use of different digging elements E02F3/7604, E02F3/769, E02F3/78 take precedence; quick-acting devices to connect tools to arms or booms E02F3/3609, for arms to tractors or the like E02F3/627
• CPC Class Codes: E02F 9/2267 Valves or distributors position of valves arrangements on upper-structures E02F9/0875
• CPC Class Codes: F15B 13/0825 the modular elements being mounted on a common member, e.g. on a rail
• CPC Class Codes: F15B 13/0871 Channels for fluid
• CPC Class Codes: F15B 13/0896 using different types or sizes of valves
• CPC Class Codes: F16L 41/12 using attaching means embracing the pipe
• CPC Class Codes: Y10T 137/85938 Non-valved flow dividers
• CPC Class Codes: Y10T 137/85978 With pump
• CPC Class Codes: Y10T 137/86574 Supply and exhaust

Abstract

The present invention relates to a hydraulic auxiliary valve device (1) adapted to be connected to a hydraulic main valve (20) on a work vehicle, which work vehicle comprises a hydraulic system comprising a pump and a tank, the auxiliary valve device (1) comprises: —a first motor port connection (4A) and a second motor port connection (4B) arranged to be connected to a first motor port and a second motor port, respectively, on a double acting hydraulic motor, in particular a double acting hydraulic cylinder, —a pump lead-through (2), which connects the pump input port connection (2A) of the auxiliary valve device (1) to the pump connection output port (2B); —a tank lead-through (3), which connects the tank input port connection (3A) of the auxiliary valve device (1) to the tank connection output port (3B); and —a control valve (IA) provided with two open positions, which control valve (1A) in the first open position connects the pump input port connection (2A) to the first motor port connection (4A) and the tank input port connection (3A) to the second motor port connection (4B), and in the second open position connects the pump input port connection (2A) to the second motor port connection (4B) and the tank input port connection (3A) to the first motor port connection (4A).

Claims

1. Hydraulic auxiliary valve device connectable to a hydraulic main valve on a work vehicle, which work vehicle comprises a hydraulic system including a pump and a tank, the auxiliary valve device comprising:

a first motor port connection and a second motor port connection arranged to be connected to a first motor port and a second motor port, respectively, on a double acting hydraulic motor, in particular a double acting hydraulic cylinder,

an inlet connection connectable to a hydraulic system on the work vehicle, which inlet connection comprises a pump input port connectable to the pump of the hydraulic system, and a tank input port connection connectable to the tank of the hydraulic system;

an outlet connection connectable to the main valve, which outlet connection comprises a pump connection output port connectable to a pump input port on the main valve, and a tank connection output port, connectable to a tank input port on the main valve;

a pump lead-through, in the form of a length of tubing, having two opposed ends which connects the pump input port connection of the auxiliary valve device to the pump connection output port;

a tank lead-through, in the form of a length of tubing, having two opposed ends which connects the tank input port connection of the auxiliary valve device to the tank connection output port;

a control valve provided with two open positions, which control valve in the first open position connects the pump input port connection to the first motor port connection and the tank input port connection to the second motor port connection, and in the second open position connects the pump input port connection to the second motor port connection and the tank input port connection to the first motor port connection;

the pump and tank lead-through lengths of tubing, between the opposed ends, and including openings connectable to the control valve to connect the pump input port connection and the tank input port connection to the motor port connections of the auxiliary valve device, and

wherein the lengths of tubing are detachable with respect to a main part of the auxiliary valve device.

2. Hydraulic auxiliary valve device according to claim 1, wherein each length of tubing comprises a shoulder, which is adapted to bear against a corresponding shoulder on said main part when connected correctly.