Hydraulic Arrangement for Safer Float Position Control
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Summary
Problems
Current hydraulic arrangements with float positions are costly and prone to operator errors due to the need for additional valves and complex valve relationships to manage pressure and prevent unintended lowering of booms or levers, especially when leaks occur.
Innovation solutions
A hydraulic arrangement with a controller having a fourth switch position that connects the second supply pipe directly to the reservoir, eliminating the need for a second on/off valve and simplifying valve relationships, while an on/off valve automatically opens in the float position to ensure control pressure is maintained.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If additional on/off valves and hydraulic pipes are added to enable float position with load holding, then safety and load holding capability are improved, but device complexity and cost increase
Why choose this principle:
The patent combines the float position control and load holding functions into a single integrated valve arrangement. The first and second on/off valves work together with the hydraulic pipe connecting both chambers to enable float position, while the automatic shut-off valve provides load holding capability. This merging eliminates the need for separate, complex valve relationships while maintaining safety and functionality.
Principle concept:
If additional on/off valves and hydraulic pipes are added to enable float position with load holding, then safety and load holding capability are improved, but device complexity and cost increase
Why choose this principle:
The hydraulic pipe serving as the connection between first and second chambers performs multiple functions: it enables float position by allowing pressure equalization, facilitates load holding through coordinated valve operation, and eliminates the need for additional dedicated hydraulic lines. This multi-functionality reduces overall system complexity while maintaining reliability.
Application Domain
Data Source
AI summary:
A hydraulic arrangement with a controller having a fourth switch position that connects the second supply pipe directly to the reservoir, eliminating the need for a second on/off valve and simplifying valve relationships, while an on/off valve automatically opens in the float position to ensure control pressure is maintained.
Abstract
A hydraulic arrangement for implementing a float position is provided. The arrangement includes: a hydraulic cylinder having a first chamber and a second chamber, a first supply pipe connected to the first chamber and a second supply pipe connected to the second chamber; a volumetric control valve assembly located within a hydraulic pipe and arranged between the first and second chamber; a hydraulic fluid feeder in fluid communication with a hydraulic reservoir; and a controller having a raise position, a lower position, a neutral position, and a float position to control the hydraulic cylinder. The second supply pipe is fluidly connected to the hydraulic reservoir and the first and second supply pipes are substantially prevented from being fluidly connected to the hydraulic fluid feeder when the controller is in the float position.