Pipe Wrench Adjustable Jaw Alignment and Grip
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pipe wrenches face challenges in accommodating differently sized work pieces due to fixed jaw and hook jaw configurations, which limit their versatility and effectiveness in applying torque to round objects.
Innovation Solution
A pipe wrench design featuring a head with a first and second jaw, where the second jaw has a threaded portion and teeth extending beyond the first jaw, an actuator to move the second jaw relative to the first, and an extension handle, with a biasing mechanism to align the threaded portion, allowing for adjustable grip and leverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the jaw spacing is fixed, then the structural simplicity is maintained, but the adaptability to different pipe sizes is limited
Solution Approach 1:
The hook jaw is made movable relative to the fixed jaw through a threading mechanism. The movable jaw can be adjusted along the handle axis by rotating the actuator, which engages with threads on the movable jaw. This dynamic adjustment capability allows the wrench to adapt to different pipe diameters while maintaining a relatively simple overall structure.
Solution Approach 2:
The wrench head is designed to accommodate multiple jaw configurations (fixed jaw and movable hook jaw) that can handle various pipe sizes. The universal design allows the same wrench head to serve multiple functions across different application scenarios by simply adjusting the movable jaw position.
2Reliability
If the contact region width is increased, then the grip stability is improved, but the leverage length is reduced
Solution Approach 1:
The contact regions on both jaws are designed with teeth that extend beyond the jaw faces in the direction parallel to the side surfaces of the head. This creates a localized extension of the contact area without increasing the overall width of the jaws. The teeth provide enhanced grip stability through increased surface area and mechanical interlocking, while the jaw dimensions and handle length remain optimized for leverage.
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 enhances the wrench's ability to grip and manipulate pipes and fittings of varying sizes by allowing adjustable jaw distance and increased leverage, improving torque application and versatility.
Implementation Method 1
an actuator having threads engaged with the threaded portion of the second jaw such that rotation of the actuator moves the second contact region of the second jaw relative to the first contact region of the first jaw
Implementation Method 2
a biasing mechanism located within the first aperture to align the threaded portion of the second jaw with the central axis of the first aperture
Implementation Method 3
the jaws typically include teeth for improved grip
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
A pipe wrench includes a head having an aperture defining a central axis. The pipe wrench includes a first jaw coupled to the head having a plurality of teeth defining a first contact region, and a second jaw partially extending through the aperture of the head having a threaded portion and a plurality of teeth defining a second contact region. The second contact region extends beyond the first contact region in a direction parallel to side surfaces of the head. The pipe wrench includes a biasing mechanism located within the aperture to align the threaded portion of the second jaw with the central axis of the aperture, and an actuator having threads engaged with the threaded portion of the second jaw such that rotation of the actuator moves the second contact region of the second jaw relative to the first contact region of the first jaw.