Precision Pruner with Segmented Notches for Deep Branch Cutting

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Solution Overview

Problem

Existing pruning tools are inadequate for selectively cutting small branches and vines deep within a bush or shrub, as they either cut too much of the bush or are unsuitable for precision work due to large cutting edges or are ineffective for supple vines.

Innovation Solution

A precision pruner with an elongated tool portion, notches, and a moveable cutter sub-assembly that allows for single-handed operation, enabling precise cutting of small branches and vines by aligning cutting edges with notches and using a sliding cutter mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If shaping pruners with long blades are used to cut small branches deep within a bush, then the exterior can be shaped easily, but the tool cuts too much of the bush and cannot perform precision work

Engineering Contradiction:

Improveease of shaping exteriorVSAvoidprecision cutting

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The tool portion is segmented into multiple notches along its length, with corresponding cutters that can be selectively positioned. This allows the user to engage only the specific cutter needed for the target branch, enabling precision work deep within the bush without cutting surrounding foliage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different notches and cutters are positioned at specific locations along the tool portion to match the depth and position of branches within the bush. This local customization allows precise cutting at various depths without affecting other areas of the plant.

Inventive Principle:

Principle #3Local quality

2Strength

If branch pruners with C-shaped cutters are used to cut thick branches, then leverage is provided for thicker stems, but small supple vines cannot be cut effectively as they bend or smash rather than being cut

Engineering Contradiction:

Improvecutting leverage for thick branchesVSAvoidprecision cutting of small vines

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The cutter geometry is changed from C-shaped to straight-edged blades that can precisely slice through small supple vines. The notches are sized to accommodate thin vines while the cutting edges provide sufficient leverage for thicker branches, adapting the cutting parameters to match the branch size.

Inventive Principle:

Principle #35Parameter changes

3Length of moving object

If ordinary pruning tools with long handles are used to reach deep inside a bush, then the tool can access internal branches, but two hands are required for operation reducing maneuverability

Engineering Contradiction:

Improvereach depth into bushVSAvoidsingle-handed operation

Core Design Contradiction:

Length of moving objectVSEase of operation

Solution Approach 1:

The handle and tool portion are merged into a single integrated structure rather than separate components. This consolidation reduces the overall length while maintaining the reach capability, and allows the tool to be operated with one hand while the other hand can manipulate branches and leaves for better access.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11212965B1Tool for deep selective pruning of branches and vines

Publication Date: 2022.01.04 HAMES LESTER DUANE

AI summary

A precision pruner for selectively cutting twigs, branches, stalks and vines deep within a bush or shrub has an elongated tool portion with at least one notch. A first handle is stationarily disposed on the tool portion and a cutter portion is slidably disposed on the tool portion. A cutting edge is aligned with notch(es) in a normal position, and a second handle is pivotally disposed on the first handle portion such that squeezing the first and second handles together slides the cutter portion relative to the tool portion out of the normal position so that the cutting edge(s) and the notch(es) are moved towards each other, thereby cutting any material received within the notch(es).