Dual-Pump Hydraulic Jack Feeding for Low-Effort Lifting
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Solution Overview
Problem
The use of manual hydraulic jacks for lifting heavy loads is inconvenient due to the effort required to operate the lever, which increases with the length of the lever, and can be difficult in small environments, despite offering flexibility without external power sources.
Innovation Solution
A dual pumping subsystem feeding system for hydraulic jacks, comprising an alternating manual pumping subsystem and a second rotating subsystem actuated by an external tool or actuator, with safety and non-return valves, allowing flexible operation and reduced operator effort for handling heavy loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a manual lever pumping system is used to lift heavy loads, then the hydraulic jack can operate without external power sources providing flexibility in remote environments, but the operator effort increases significantly especially when the main hydraulic cylinder must be extended by a significant length
Solution Approach 1:
The patent divides the single pumping function into two distinct pumping subsystems: a first manual lever-operated pumping subsystem and a second rotating subsystem actuated by an external tool. This segmentation allows the system to offer both manual operation flexibility and reduced-effort automated operation, resolving the contradiction between adaptability and ease of operation.
Solution Approach 2:
The feeding system is designed with multi-functionality by incorporating both a manual lever pumping subsystem and a rotating subsystem that can be actuated by external tools such as power drills. This universal design enables the hydraulic jack to be operated in different modes (manual or powered) depending on the application requirements, thereby providing both flexibility and reduced operator effort.
2Ease of operation
If the lever length is increased to reduce operator effort, then the mechanical advantage improves, but the space required for lever actuation increases making it difficult to operate in small environments
Solution Approach 1:
The patent replaces the traditional long manual lever mechanical system with a rotating subsystem that can be actuated by external power tools. This substitution eliminates the need for a long lever arm, significantly reducing the actuation space required while maintaining or improving the ease of operation through reduced operator effort.
3Device complexity
If a single pumping subsystem is used to maintain system simplicity, then the device complexity remains low, but the productivity decreases when handling heavy loads requiring significant cylinder extension
Solution Approach 1:
The patent segments the pumping function into two independent subsystems with different actuation methods (manual lever and rotating). This segmentation enables the system to achieve higher productivity when needed by using the rotating subsystem with external power tools, while the overall device complexity remains manageable due to the modular and independent nature of each subsystem.
Solution Approach 2:
The system incorporates periodic action through the alternating operation of the two pumping subsystems. The first pumping subsystem and second pumping subsystem can operate in alternating sequences or simultaneously, providing periodic fluid delivery that increases productivity while maintaining system simplicity through the use of identical pump mechanisms.
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 dual pumping system enhances operational flexibility and reduces operator effort, enabling easier handling of heavy loads, and allows remote operation of the hydraulic jack, improving safety and usability in confined spaces.
Implementation Method 1
a first pumping subsystem (121; 122; 140; 142; 123) with alternating manual drive, installed on said body (101; 132) and configured to draw the fluid from said body and feed it onto said outlet (150)
Implementation Method 2
a second pumping subsystem (118), distinct and independent of the first pumping subsystem, installed on said body (101; 132), configured to be rotated by a tool, and configured to draw the fluid from said body and feed it onto said outlet (150)
Implementation Method 3
a main hydraulic cylinder (107c) of the hydraulic jack (100)... configured to be actuated by a feeding system in order to allow the axial extension or compression
Data Source
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AI summary
Feeding system for a hydraulic jack, characterized in that it comprises: - a body (101; 132) configured to contain a determined amount of fluid and having an outlet (150) through which, in use, the fluid is fed to a main hydraulic cylinder (107c) of the hydraulic jack (100); - a first pumping subsystem (121; 122; 140; 142; 123) with alternative manual drive, installed on said body (101; 132) and configured to draw the fluid from said body and feed it onto said outlet (150); - a second pumping subsystem (118), distinct and independent of the first pumping subsystem, installed on said body (101; 132), configured to be rotated by a tool, and configured to draw the fluid from said body and feed it onto said outlet (150).