Wheeled Polyurethane Injection Gun Assembly for Standing Operation
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Solution Overview
Problem
Existing polyurethane injection guns are cumbersome and require users to kneel on the ground for operation, limiting mobility and efficiency in injecting polyurethane foam under concrete.
Innovation Solution
A polyurethane injection gun assembly with a frame, handle, wheels, and a mixing assembly that includes inlets for pressurized air and polyurethane components, featuring a swivel connector with a gear mechanism for easy attachment to concrete, allowing remote control and standing operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing polyurethane injection guns are used, then the injection function is achieved, but the device is cumbersome and requires users to kneel on the ground for operation
Solution Approach 1:
The patent introduces a wheeled base with a horizontal platform, transforming the vertical kneeling operation into a standing operation. The mixer assembly is positioned on the horizontal platform at a height suitable for standing operation, eliminating the need for users to kneel on the ground while maintaining the injection function.
Solution Approach 2:
The device is divided into separate functional modules: a wheeled base for mobility, a horizontal platform for support, and a mixer assembly for injection. This segmentation allows each component to be optimized independently, with the platform providing ergonomic standing height and the mixer maintaining its injection capability.
2Ease of operation
If existing polyurethane injection guns are used, then the injection function is achieved, but mobility is limited
Solution Approach 1:
The patent incorporates a wheeled base that enables the entire mixer assembly to be moved easily across the work area. The wheels transform the static injection gun into a mobile unit, allowing users to transport the device to different locations without disassembly or manual carrying.
3Adaptability or versatility
If a frame with wheels and adjustable handle arms is added, then mobility and ergonomics are improved, but device complexity increases
Solution Approach 1:
The horizontal platform serves multiple functions: it provides a stable base for the mixer assembly, offers ergonomic standing height for operation, and acts as a mounting surface for the adjustable handle arms. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The handle arms are pre-adjusted to appropriate lengths and angles during assembly, allowing users to immediately benefit from ergonomic positioning without requiring complex adjustments during operation. This preliminary configuration simplifies the user interface while maintaining adaptability.
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 efficient and mobile injection of polyurethane foam without the need to kneel, enhancing user comfort and operational efficiency by allowing standing operation and remote control.
Implementation Method 1
The swivel connector includes a second gear that is configured to be rotated via the first gear when the handle is rotated.
Data Source
AI summary
A polyurethane injection gun assembly includes a frame, a handle coupled to the frame, a wheel coupled to the frame, and a mixing assembly coupled to the frame, wherein the mixing assembly includes a mixer manifold, a first inlet for connection to a source of pressurized air, a second inlet for connection to a source of a first polyurethane foam component, and a third inlet for connection to a source of a second polyurethane foam component.