Multipurpose Lifting Device with Adjustable Lever Arm
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Solution Overview
Problem
Existing devices for lifting and maneuvering heavy objects like manhole covers and fence posts often require assistance, are unsafe due to lack of leverage, and are not adjustable to user height, leading to potential injuries and inefficiencies.
Innovation Solution
A stand-alone multipurpose device with an elongated vertical support and angled lever arm, featuring adjustable height and length, pivotable attachments, and various working heads, allowing for safe and efficient lifting, pulling, and maneuvering of heavy objects without assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional lifting devices are used, then lifting capability is provided, but assistance is required and safety is compromised
Solution Approach 1:
The device incorporates an adjustable lever arm length mechanism that allows dynamic adaptation to different lifting scenarios. The lever arm can be extended or retracted based on the specific task requirements, enabling a single operator to safely handle various heavy objects by optimizing the mechanical advantage for each situation.
Solution Approach 2:
The device changes the parameter of lever arm length to provide adequate leverage for safe operation. By allowing the lever arm length to be adjusted, the system can provide sufficient mechanical advantage for single-person operation while maintaining safety, resolving the contradiction between ease of operation and reliability.
2Ease of operation
If fixed-length lever arm is used, then device simplicity is maintained, but user comfort and safety are reduced due to inability to adjust to user height
Solution Approach 1:
The lever arm length is made dynamically adjustable rather than fixed, allowing the device to adapt to different user heights and preferences. This dynamic adjustment capability improves user comfort and safety while adding only minimal complexity through a straightforward extension or retraction mechanism.
3Force
If heavy machinery is used for lifting, then lifting capability is achieved, but the task becomes overly complex and less efficient for individual use
Solution Approach 1:
The lifting system is segmented into modular components including an adjustable lever arm, interchangeable working heads, and a compact base structure. This segmentation allows the device to provide sufficient lifting force for heavy objects while maintaining relative simplicity and efficiency for individual operation, avoiding the complexity of heavy machinery.
Solution Approach 2:
The device incorporates multi-functional working heads that can be interchanged based on the specific lifting task. This universality allows a single device to handle various heavy objects effectively, providing adequate lifting force without requiring complex specialized machinery for each application.
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
Enables single-person operation of heavy tasks with reduced risk of injury, providing ample leverage and adjustable settings for user comfort and safety, while maintaining strength and efficiency in lifting and moving heavy loads.
Implementation Method 1
an angled elongated lever arm section comprising quick release attachment means at one end for attaching a working head to the lever arm and a detachable extension arm and handle at the other end distal to the working head for holding by a user and applying a downward force on the lever arm section
Implementation Method 2
the lever arm section is pivotally attached to the vertical section by means of a pivot pin inserted through one of the pivot slots on the U-shaped receiving bearing and a corresponding receiving aperture on the lever arm section
Data Source
AI summary
A stand-alone multipurpose lifting device includes an elongated vertical support section having a planar base section with an upper end including a substantially U-shaped receiving bearing including a plurality of pivot slots on either side of the U-shaped bearing and an angled elongated lever arm section. The lever arm section includes an angle strengthening gusset and a detachable extension arm and handle including a receiving sleeve for fitting over and receiving the end of the lever arm section. A device for cracking a seal formed around a manhole cover includes a horizontal cross bar section including a bottle jack holder recess, a bottle jack retaining means, two opposed leg sections, support struts between the horizontal cross bar and leg sections and a jack cap section including two lifting eyes including a hook and lifting chains for attaching to a manhole lifting arm detachably connected to a manhole cover.