Adjustable Oil Filter Tool With Locking Jaws
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Solution Overview
Problem
Existing tools for handling screw-on oil filter cartridges in internal combustion engines are cumbersome, requiring both hands to operate and often fall off due to weak biasing, making them difficult to use in cramped engine bays and poorly lit spaces.
Innovation Solution
A tool with automatically locking gripping jaws that can be opened wide enough to accommodate various sizes, allowing single-handed operation and a robust biasing mechanism to securely hold the cartridge, featuring a compact detent arrangement for locking and a separate release actuator that engages parallel to the longitudinal axis for ergonomic operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a weaker return spring is used to enable two-handed separation of the jaws in tight spaces, then the ease of operation is improved, but the reliability deteriorates because the tool is more likely to fall off the oil filter cartridge
Solution Approach 1:
The tool separates the biasing function into two distinct components: a strong main return spring (16) for reliable jaw closure and a weaker secondary spring (16b) for controlled jaw separation. This segmentation allows each spring to be optimized for its specific function, resolving the contradiction between ease of operation and tool retention.
Solution Approach 2:
A detent mechanism (40, 42) acts as an intermediary between the operator's manual separation force and the main return spring. The detent allows controlled jaw separation by overcoming a small resistance, making it easy to open the jaws, while the main return spring remains intact to provide strong closure force for reliable retention during rotation.
2Adaptability or versatility
If the gripping jaws are designed to be manually pulled apart by the operator, then the adaptability is improved for different oil filter sizes, but the device complexity increases due to the need for manual operation in cramped spaces
Solution Approach 1:
The tool incorporates an automatic detent mechanism that self-activates when the oil filter cartridge is inserted between the jaws. The cartridge body itself triggers the detent release, causing the jaws to automatically close around the filter without requiring manual intervention. This reduces operational complexity while maintaining adaptability to different filter sizes.
3Reliability
If the gripping jaws are locked in a fixed position, then the reliability of grip is improved, but the adaptability to accommodate oil filter cartridges of all conventional sizes deteriorates
Solution Approach 1:
The tool uses a dynamic detent mechanism (40, 42) that can transition between locked and unlocked states. During normal operation, the detent maintains a locked state providing reliable grip stability. When the release actuator is activated, the detent transitions to an unlocked state, allowing the jaws to be repositioned for different filter sizes, thus achieving both reliability and adaptability.
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 secure and efficient handling of oil filter cartridges in tight spaces with one hand, reducing the likelihood of the tool falling off and allowing for easy reconfiguration between screwing and unscrewing operations.
Implementation Method 1
a biasing means (16) arranged to bias the gripping jaws (12a, 12b) towards each other
Implementation Method 2
a locking mechanism (40, 42) configured to lock the gripping jaws (12a, 12b) at a pre-determined distance away from each other
Data Source
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AI summary
A tool (10) for rotating a screw-on oil filter cartridge, the tool comprising a driving member (28, 28b); gripping jaws (12a, 12b) movable in relation to each other for gripping an oil filter cartridge; a guide arrangement (13, 14a, 14b) for guiding the gripping jaws; means (16a, 16b) for biasing the gripping jaws towards each other; and a driving mechanism (28, 28c, 24, 22a, 22b, 20a, 20b, 21 a, 21 b) coupled to the driving (28b) member and gripping jaws (12a, 12b) for converting rotation into movement of the gripping jaws towards each other, into engagement with an oil filter cartridge and applying either screwing or unscrewing torque thereto. The tool comprises: a locking mechanism (30, 32, 28, 24) for releasably locking the gripping jaws (12a, 12b) at a pre-determined distance from each other; and a release actuator (28a) for unlocking the locking mechanism and releasing of the gripping jaws.