Retractable Pull Handle for Wheeled Pressure Washer Storage
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Solution Overview
Problem
Electric-powered pressure washers are cumbersome to move due to the need for repeated lifting and carrying, and wheeled models often require disassembly for shipping and storage, with handles that can impede compact storage and are prone to damage from obstructions.
Innovation Solution
A wheeled pressure washer design featuring a pre-assembled pull handle that can be selectively extended for rolling and retracted for compact storage, with a stationary lifting handle and protective fenders to prevent wheel damage, allowing for easier handling and reduced assembly requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wheeled pressure washer is designed with an upstanding pull handle for easy rolling, then ease of operation is improved, but device complexity increases due to disassembly requirements for shipping and storage
Solution Approach 1:
The pull handle is designed to be selectively positionable between an extended position for rolling and a retracted position for storage. This dynamic configuration allows the handle to adapt its length based on operational needs, providing ease of rolling when extended and compact storage when retracted, thereby resolving the contradiction between ease of operation and device complexity
Solution Approach 2:
The pull handle can be positioned within a recess in the housing when retracted, effectively nesting the handle within the housing structure. This nesting approach eliminates the need for separate storage space and simplifies the overall device configuration during shipping and storage, addressing the device complexity issue while maintaining operational ease
2Ease of operation
If a wheeled pressure washer is designed with an upstanding pull handle for easy rolling, then ease of operation is improved, but loss of time occurs due to disassembly and assembly by customer
Solution Approach 1:
The pressure washer is shipped with the pull handle pre-assembled in a retracted position within the housing. This preliminary assembly action eliminates the need for customer assembly, saving time while still allowing the handle to be extended to the operational position when needed, thus resolving the contradiction between ease of operation and assembly time
3Volume of moving object
If a wheeled pressure washer is designed for compact storage with handle retracted, then volume is reduced, but reliability decreases due to handle exposure to liquids and contaminants
Solution Approach 1:
The pull handle is positioned within a recess in the housing when retracted, effectively nesting it within the protected housing structure. This nesting provides physical protection from liquids and contaminants while maintaining compact storage volume, thereby resolving the contradiction between storage compactness and handle reliability
Solution Approach 2:
A removable cap or cover can be placed over the pull handle when stored to provide additional protective enclosure. This flexible protective element shields the handle from environmental contaminants during storage and transport, maintaining reliability while preserving compact storage capabilities
4Ease of operation
If wheels are exposed for easy rolling, then ease of operation is improved, but object-affected harmful factors increase due to wheel damage from obstructions
Solution Approach 1:
Protective fenders are positioned around the wheels to provide beforehand protection from obstructions and damage. These fenders act as a first line of defense, absorbing or deflecting impacts before they reach the wheels, thereby maintaining ease of rolling while reducing the harmful factors affecting wheel integrity
Data Source
AI summary
A pressure washer is provided including a housing. A pump is contained within the housing for pressurizing fluid received through a water inlet port and for pumping the pressurized fluid through an outlet port. An application wand is connected to the water outlet for outputting a pressurized stream of fluid. At least one wheel is supported on the housing so as to enable rolling movement of the housing. A first handle is arranged on the housing for movement between a retracted position in which a gripping portion of the handle is arranged relatively closer to the housing and an extended position in which the gripping portion of the handle is arranged relatively further away from the housing.