Cutting Deck Discharge Chute and Blocking Plate for Edge Mowing

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Solution Overview

Problem

Lawn mowers often have discharge chutes that interfere with mowing close to edges or through narrow openings, and there is a need to block the discharge of clippings into certain areas.

Innovation Solution

A movable discharge chute and blocking plate system that allows the chute to switch between operative and inoperative positions, with the blocking plate corresponding to the chute's movement to open or close the discharge outlet.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the discharge chute is extended laterally to direct clippings effectively, then debris management is improved, but the mower's ability to mow close to edges and pass through narrow openings is worsened

Engineering Contradiction:

Improvedebris management efficiencyVSAvoidmaneuverability near edges and through gates

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The discharge chute is made movable rather than fixed, allowing it to be repositioned between an extended position for effective debris management and a retracted position for improved maneuverability. The chute can be rotated or pivoted to change its orientation relative to the mower body, enabling the operator to adapt the chute position to different mowing conditions and obstacles.

Inventive Principle:

Principle #15Dynamics

2Productivity

If the discharge chute is positioned to direct clippings away from the mower, then debris management is improved, but the ability to block discharge into flower beds or sensitive areas is worsened

Engineering Contradiction:

Improvedebris management efficiencyVSAvoidability to block discharge in specific areas

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The discharge chute incorporates a blocking plate that can be moved to obstruct the discharge outlet, allowing the operator to redirect clippings away from sensitive areas such as flower beds. The blocking plate can be positioned to completely block the discharge or partially redirect the flow, providing versatile control over debris disposal locations.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The discharge control system is divided into separate functional components: the discharge chute for directing debris and the blocking plate for obstructing the outlet. This segmentation allows each component to be independently controlled and positioned to achieve different discharge patterns and blockage configurations as needed.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If a movable discharge chute system is implemented, then adaptability and maneuverability are improved, but device complexity is worsened

Engineering Contradiction:

Improvechute repositioning capabilityVSAvoidmechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blocking plate mechanism is integrated with the discharge chute assembly, combining two functions (chute positioning and discharge blocking) into a single unified mechanism. This merging reduces the number of separate components and simplifies the overall structure while maintaining the desired adaptability and control capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250261586A1Lawn mower and cutting deck with discharge chute control system

Publication Date: 2025.08.21 THE TORO COMPANY

AI summary

A lawn mower having a cutting deck with a chute control system having a moveable discharge chute. The discharge chute is adapted to move from an operative position to an inoperative position, whereby such movement results in corresponding movement of a blocking plate used to selectively block a discharge outlet of the cutting deck from an open position to a closed position, respectively.