Telescoping Lawnmower Handle With Constant Velocity Joint

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Solution Overview

Problem

Conventional lawnmowers are prone to tipping over on hillsides, posing safety risks, and emit significant noise and combustion waste, lacking maneuverability and emission-free operation.

Innovation Solution

A lightweight, zero-emission lawnmower with a handle connected via a constant velocity joint for improved stability on inclines, powered by a hydraulic motor and solar energy, featuring a single cylindrical handle for adjustable length and a spherical roller for support, allowing operation without internal combustion engines and external power sources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional lawnmower is used on hillsides, then it can perform cutting function, but it is prone to turning over and causing catastrophic injuries

Engineering Contradiction:

ImprovesafetyVSAvoidtipping hazard

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a telescoping handle that allows the operator to adjust their position vertically and horizontally relative to the mower deck. By extending the handle, the operator can maintain a safer distance from the cutting area while improving balance and control on inclined surfaces, effectively adding dimensional adjustment capability to prevent tipping hazards

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If a conventional lawnmower is used, then it can cut grass, but it is very noisy and emits significant combustion waste products

Engineering Contradiction:

Improvecutting capabilityVSAvoidnoise and emissions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the internal combustion engine with an electric motor powered by a battery system. This substitution eliminates combustion-related noise and emissions while maintaining the cutting capability through electrically driven blades, directly addressing the harmful factors generated by conventional mowers

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If a conventional lawnmower is used, then it can operate, but it requires internal combustion engines and external power supplies

Engineering Contradiction:

Improveoperational independenceVSAvoidpower system dependency

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent implements a self-contained battery-powered electric system that provides operational independence. The mower carries its own power source (battery) and generates electricity through regenerative braking during operation, eliminating dependency on external power supplies or complex combustion engine systems while maintaining cutting functionality

Inventive Principle:

Principle #25Self-service

4Reliability

If a lawnmower with telescoping handle is used, then user safety is enhanced, but the handle structure becomes more complex

Engineering Contradiction:

ImprovesafetyVSAvoidhandle structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The telescoping handle is divided into multiple telescopic sections that can extend and retract independently. This segmentation allows the handle to achieve variable length functionality for safety and ergonomics while keeping each individual section structurally simple and manageable, reducing overall structural complexity

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS9179597B1Lawnmower with telescoping handle

Publication Date: 2015.11.10 KASPAR ADRIENNE B

AI summary

A lawnmower with a plurality of motorized cutting blades may be configured to include a constant velocity joint to connect the telescoping handle of the lawnmower to the lawnmower body. The constant velocity joint may allow the lawnmower body to move in vertical or horizontal directions while the handle remains upright.