Thumb Grip Extension for Motorcycle Throttle Screw

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Solution Overview

Problem

Existing throttle control devices for motorcycles lack an efficient and compact thumb grip extension mechanism that allows easy access and adjustment of the throttle screw without increasing the outer dimensions of the throttle screw.

Innovation Solution

A thumb grip extension device with a disc-shaped base and angularly spaced detent structures, which are resiliently movable to fit onto the throttle screw head, providing a handle for leverage and maintaining the throttle in a desired position without protruding beyond the screw's dimensions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a lever is provided for attaching to an existing throttle screw to act as an extension, then the operator can more easily access and adjust the throttle screw, but the lever requires an attachment screw to secure it and tends to protrude outside the outer dimensions of the throttle screw

Engineering Contradiction:

Improveaccess and adjustment of throttle screwVSAvoidattachment screw requirement

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The detent structures are resiliently movable and automatically engage with the throttle screw head without requiring separate attachment screws. The device secures itself to the throttle screw through the resilient detent structures that snap into place, eliminating the need for additional fastening components.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The thumb grip extension device is designed with an outer dimension that closely matches the throttle screw head, allowing it to nest tightly against the existing screw. The detent structures fit within the contours of the throttle screw head, minimizing protrusion and creating a compact integrated appearance.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If a lever is provided for attaching to an existing throttle screw to act as an extension, then the operator can more easily access and adjust the throttle screw, but the lever tends to protrude outside the outer dimensions of the throttle screw

Engineering Contradiction:

Improveaccess and adjustment of throttle screwVSAvoidouter dimension of throttle screw

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The device features a handle that protrudes radially outwardly from one of the detent structures, providing localized leverage where needed for operation. The base and detent structures maintain a compact profile that matches the throttle screw head dimensions, concentrating the operational functionality in a specific location rather than uniformly increasing size.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The handle protrudes radially outwardly from the detent structures, utilizing the radial dimension for leverage while keeping the axial and diametral dimensions of the base compact. This dimensional arrangement allows operational leverage without substantially increasing the overall envelope of the throttle screw assembly.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If detent structures are made resiliently movable, then the device can be easily installed and retained on the throttle screw, but the structure becomes more complex

Engineering Contradiction:

Improveinstallation and retention of deviceVSAvoidresilient detent structure

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The base, detent structures, and handle are all formed together as a single molded unit, integrating multiple functional elements into one component. This merging simplifies manufacturing and assembly while the resilient detent structures provide easy installation through a snap-fit mechanism onto the throttle screw head.

Inventive Principle:

Principle #5Merging (Combining)

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 easy installation and retention on the throttle screw, allowing partial rotation to switch between free and set throttle positions, improving operational ease without increasing the device's outer dimensions.

Implementation Method 1

The detent structures are resiliently movable outwardly relative to each other to allow the device to be installed and retained on the head of the throttle screw

Methodology Applied

Scientific EffectResilient movement: Elasticity

Data Source

PatentUS7806023B2Thumb grip extension device for motorcycle throttle screw

Publication Date: 2010.10.05 BOBROW BROS

AI summary

A throttle control assembly includes a throttle screw for retaining a hand grip throttle control in a desired position, and a thumb grip extension device removably attached to the head of the throttle screw to facilitate turning the screw. The thumb grip extension device includes a disc-shaped base, a plurality of detent structures extending above an upper surface of the base, and a handle protruding radially outwardly from one of the detent structures. The detent structures each have a convex outer surface with a curvature that generally corresponds to the outer periphery of the base, a convex inner surface, and a detention ridge protruding from and extending across the convex inner surface at a location spaced from the upper surface of the base. The detent structures are resiliently movable outwardly relative to each other to allow the device to be installed and retained on the head of the throttle screw.