Handheld Controller Input Choke for Fluid Hoist Control
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Solution Overview
Problem
Fluid-operated hoists with long control fluid lines experience control delays and imprecise control due to the large internal volume of the fluid lines, leading to unfavorable control characteristics that can vary significantly between identical hoists and user applications.
Innovation Solution
A handheld controller with an input choke in the control fluid inlet allows for adjustable flow rates and control characteristics, enabling precise control of fluid-operated hoists by compensating for manufacturing tolerances and optimizing control behavior based on user and application-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If long fluid lines are used to connect the handheld controller to the hoist, then the controller can be operated from a greater distance, but control delay occurs due to the large internal volume of the fluid lines
Solution Approach 1:
The patent applies parameter changes by introducing an adjustable flow rate control mechanism that modifies the flow characteristics of the control fluid. By adjusting the flow rate parameters, the system optimizes the balance between operating distance and control responsiveness, allowing operators to use longer fluid lines while maintaining acceptable control delay through increased fluid flow velocity.
2Ease of manufacture
If identical hoists are manufactured with standard tolerances, then manufacturing cost is reduced, but control behavior varies between individual hoists making precise control difficult
Solution Approach 1:
The patent implements self-service by providing an adjustable flow rate control mechanism on each handheld controller that allows users to self-calibrate and optimize control characteristics for their specific hoist unit. This eliminates the need for precision manufacturing across all units, as each operator can adapt the control fluid flow rate to compensate for manufacturing variations, achieving consistent control behavior without increased manufacturing complexity.
3Speed
If the control fluid flow rate is increased to reduce control delay, then control responsiveness improves, but control precision may be compromised due to turbulent flow
Solution Approach 1:
The patent applies dynamics by making the flow rate adjustable rather than fixed, allowing the system to adapt flow characteristics based on operational requirements. The adjustable flow rate control enables operators to optimize between responsiveness and precision dynamically - using higher flow rates when quick response is needed and lower flow rates when precision control is the priority, thus resolving the trade-off between these two opposing requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The handheld controller with an input choke provides enhanced precision and adaptability in controlling fluid-operated hoists, ensuring consistent and comfortable operation across varying user and installation conditions.
Implementation Method 1
an input choke is arranged in at least one control fluid inlet in order to be able to adjust or set the flow rate or the volume flow to the control valve
Data Source
AI summary
The invention relates to a handheld controller for the indirect control of a fluid-operated hoist with at least one control fluid inlet and at least one control fluid outlet, a control valve arranged between the control fluid inlet and the control fluid outlet and a control element for actuating the control valve by a user. In order to provide a handheld controller for indirect control of a fluid-operated hoist and a fluid-operated hoist which have a particularly precise control characteristic adapted to the respective user and the respective usage situation and are thus perceived as particularly pleasant in use, it is provided that an input choke is arranged in at least one control fluid inlet in order to adjust the flow rate or the volume flow to the control valve and/or the control characteristic of the handheld controller.