Quick Adjust Knob Mechanism for Rapid Pipe Wrench Jaw Changes
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Solution Overview
Problem
Traditional pipe wrenches require time-consuming and burdensome adjustments when dealing with pipes of significantly different diameters due to the need for large adjustments in the movable jaw.
Innovation Solution
A pipe wrench with a quick adjust knob featuring a housing, floating threads, actuating buttons, and compression springs that allow for rapid jaw adjustments by actuating the floating threads away from the external screw threads using circumferentially spaced ramp surfaces and internal threads on the actuating buttons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional pipe wrench adjustment mechanism is used, then the jaw can be adjusted to fit different pipe diameters, but the adjustment process is time-consuming and burdensome
Solution Approach 1:
The patent introduces a dynamic quick-adjust mechanism that transitions between locked and unlocked states. The movable member can be rapidly moved between jaws by actuating the quick-adjust knob, which temporarily disengages the floating threads from the external screw threads, allowing the jaw to be quickly repositioned and then locked into place. This dynamic state change enables fast adjustments without compromising the stability during operation.
Solution Approach 2:
The floating threads serve as an intermediary element between the external screw threads and the quick-adjust knob. These floating threads can selectively engage with or disengage from the external screw threads, mediating the transition between adjusted and locked states. The spring-biased floating threads provide a reliable intermediary mechanism that enables quick adjustment while maintaining secure engagement during normal operation.
2Adaptability or versatility
If traditional pipe wrench adjustment mechanism is used, then the jaw can be adjusted to fit different pipe diameters, but the adjustment process is burdensome and requires significant effort
Solution Approach 1:
The quick-adjust mechanism reduces operational burden by creating a dynamic system where the movable member can be rapidly repositioned with minimal effort. The spring-biased floating threads automatically engage with the external screw threads, eliminating the need for continuous manual adjustment effort. The user simply needs to actuate the quick-adjust knob to achieve quick repositioning, significantly reducing the physical burden compared to traditional adjustment mechanisms.
Solution Approach 2:
The spring-biased floating threads provide self-service functionality by automatically engaging with the external screw threads when the quick-adjust knob is in the normal position. The spring mechanism ensures that the floating threads self-align and self-engage with the external threads, eliminating the need for precise manual alignment and reducing the operational effort required to maintain the adjustment.
3Reliability
If floating threads are spring biased into engagement with external screw threads, then secure connection is maintained, but the quick adjustment mechanism becomes more complex
Solution Approach 1:
The quick-adjust mechanism is segmented into distinct functional components: the housing, the spring-biased floating threads, the external screw threads, and the actuating mechanism. This segmentation allows each component to perform its specific function independently while working together as a unified system. The floating threads are separated from the external screw threads, allowing for independent design and optimization of each element while maintaining reliable engagement through the spring mechanism.
Solution Approach 2:
The floating threads act as an intermediary element that simplifies the overall mechanism by providing a controlled engagement interface between the quick-adjust knob and the external screw threads. This intermediary component handles the complexity of the spring-biased engagement, allowing the main mechanism to remain relatively simple while ensuring reliable connection through the floating thread's selective engagement capability.
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 quick and precise adjustments of the jaw distance, reducing the time and effort required for accommodating pipes of varying diameters.
Implementation Method 1
a pair of compression springs, each of the springs sandwiched between a corresponding one of the floating threads and the housing to bias the floating thread toward the other floating thread
Implementation Method 2
each of the actuating buttons has a pair of circumferentially spaced ramp surfaces, with one of the ramp surfaces engaged with a corresponding surface on one of the floating threads and the other of the ramp surfaces engaged with another corresponding surface on the other of the floating threads. The ramp and corresponding surfaces cooperate to actuate the floating threads away from each other
Implementation Method 3
each of the actuating buttons includes internal threads for engagement with the external threads on the shank, the internal threads and the floating threads cooperating with the external threads on the shank to adjust the position of the second jaw relative to the first jaw in response to the quick adjust knob being rotated relative to the shank
Data Source
AI summary
A pipe wrench includes the quick adjust knob, a handle, a first jaw carried on the handle, and a hook-shaped movable member mounted on the handle to translate relative to the handle and the first jaw. The quick adjust knob includes a housing, a pair of floating threads, and a pair of actuating buttons configured to actuate the floating threads out of engagement with mating threads on the moveable member to allow the movable member to be quickly adjusted relative to the handle.