Pneumatic Motor with Radial-Plane Pistons for Interference-Free Rotation
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Solution Overview
Problem
Current pneumatic motors face issues such as interference due to pistons in the same plane requiring thrust washers and retainers, galling and seizing from unitary valve bushings, heat buildup and air loss from multi-component cylinder covers, and lack of a controller for regulating air speed and data reading.
Innovation Solution
The design features pistons in different radial planes, a modular valve bushing with a collar to prevent galling, a unitary cylinder cap to reduce air leakage, and a controller for regulating air pressure and speed, using materials like Torlon™ and Teflon™ to mitigate seizing and improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pistons are aligned in the same plane, then the structure is simpler, but thrust washers and retainers are required to prevent interference
Solution Approach 1:
The patent transitions from a planar piston arrangement to a three-dimensional stacked arrangement where pistons are positioned in different radial planes. This dimensional change eliminates the need for thrust washers and retainers while preventing piston interference during rotation, as each piston operates in its own plane without interfering with others.
2Device complexity
If unitary valve bushings are used, then the structure is simpler, but galling and seizing occur due to particle entry
Solution Approach 1:
The patent divides the unitary valve bushing into separate modular components: an upper valve bushing, a lower valve bushing, and an intermediary component. This segmentation allows each component to be optimized independently, with the intermediary component specifically designed to prevent particle entry and galling while maintaining the overall structural integrity of the valve assembly.
3Ease of manufacture
If multi-component cylinder covers are used, then assembly is easier, but heat buildup and air loss occur reducing efficiency
Solution Approach 1:
The patent merges multiple cylinder cover components into a single unitary cylinder cap structure. This consolidation eliminates the gaps and interfaces between multi-component assemblies, thereby preventing heat buildup and air loss while maintaining ease of manufacture through integrated design. The unitary structure ensures better sealing and thermal management.
4Device complexity
If no controller is installed, then the device is simpler, but air speed and motor speed cannot be regulated
Solution Approach 1:
The patent incorporates a controller that monitors motor parameters such as speed and air supply, using feedback mechanisms to regulate performance. The controller receives data from sensors and adjusts air flow and motor operation accordingly, enabling precise control of air speed and motor speed while maintaining optimal efficiency under varying load conditions.
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
The design reduces air consumption by 30-40%, minimizes heat buildup, and maintains performance with reduced air leakage and improved control, while maintaining torque and speed regulation.
Implementation Method 1
a modular valve bushing to fit over said axle for allowing communication of air to/from the pneumatic motor, depending on the rotational location of said axle in relation to said modular valve bushing
Implementation Method 2
at least two pistons, each piston attached to the axle by a connecting rod, each piston and respective connecting rod being radially aligned, in respect of the axle and in one alternative, in a distinct radial plane from each other
Implementation Method 3
wherein when one connecting rod and piston are in power stroke, the other connecting rod and piston are in exhaust stroke
Implementation Method 4
a unitary cylinder cap to reduce air leakage
Implementation Method 5
a controller for regulating air pressure and air flow, motor speed and torque
Data Source
AI summary
A pneumatic motor for rotating an axle including: a. a housing including: b. an air intake port; c. an air exhaust port; d. at least two cylinders; each cylinder being positioned radially from the axle; e. at least two air channels in communication with each cylinder; f. at least two pistons, each piston attached to the axle by a connecting rod, each piston and respective connecting rod being radially aligned, each piston to be received in one of said at least two cylinders; each connecting rod being attached centrally offset in relation to a central axis of the axle; wherein when one connecting rod and piston are in power stroke, the other connecting rod and piston are in exhaust stroke.