Archery Bow Press with Screw Jack and Tapered Pin Retention
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Solution Overview
Problem
Existing bow presses are difficult to adjust and may damage compound bows due to their incremental adjustment mechanisms, requiring wrenches and special care, and often result in a non-ideal fit, leading to potential bow damage.
Innovation Solution
An improved bow press design featuring a horizontally oriented beam with an upright screw jack, a threaded rod with opposing thread directions, pivot arm brackets, and a gearbox allowing for easy adjustment of limb support arms and string retention using elastomeric bands and tapered pins, enabling precise positioning without overstressing the bow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If incremental holes are provided in the bow press for adjustment, then the position of supports can be moved to achieve a fit, but the fit is not ideal and can result in damage to the bow
Solution Approach 1:
The patent replaces the traditional mechanical incremental hole adjustment system with a digital imaging system. The imaging device captures images of the bow, and a processor analyzes these images to determine precise positioning of the supports, eliminating the need for incremental holes and providing continuous adjustment capability without risking bow damage.
Solution Approach 2:
The patent introduces an imaging device and image processing system as an intermediary between the user and the bow press adjustment mechanism. This intermediary enables precise measurement and positioning by capturing visual data of the bow and calculating optimal support positions, thereby achieving ideal fit without the limitations of incremental adjustment holes.
2Adaptability or versatility
If manual sliding clamps with bolts or set screws are used for adjustment, then the position can be changed, but the adjustment is not easy and requires wrenches or special care
Solution Approach 1:
The patent replaces manual mechanical adjustment with bolts and clamps with an automated digital imaging and processing system. The system automatically determines the correct support positions by analyzing images of the bow, eliminating the need for manual intervention with wrenches or special tools, thereby significantly improving ease of operation.
Solution Approach 2:
The bow press system performs self-adjustment by automatically capturing images of the bow, processing these images to determine optimal support positions, and positioning the supports accordingly. This self-service capability eliminates the need for user intervention with complex mechanical adjustment mechanisms.
3Device complexity
If the bow press is designed with fixed support positions, then the structure is simple, but it cannot accommodate different bow riser lengths
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with a digital imaging and processing system. The imaging device and processor provide the necessary adaptability to accommodate different bow riser lengths without requiring complex mechanical structures, thereby maintaining simplicity while achieving high versatility.
Solution Approach 2:
The digital imaging and processing system serves multiple functions: it captures images of various bow types, analyzes different bow dimensions, determines optimal support positions for different riser lengths, and controls the positioning mechanism. This multi-functional approach provides universal adaptability without increasing structural complexity.
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 bow press allows for easy and precise adjustment of the bow press to accommodate different bow riser lengths, reduces tension on the bow string, and facilitates maintenance and repair without assistance, ensuring safe and efficient operation.
Implementation Method 1
an upright screw jack is located midway along the beam and is retained to the beam
Implementation Method 2
a bow can be removably retained to each laterally extending rod by elastomeric bands
Implementation Method 3
The first half of the rod is threaded with right hand threads and the second half of the rod is threaded with left hand threads. A pair of pivot arm bracket members is slidable along the beam with one bracket member on each opposing side of the midpoint of the beam. The pivot arm bracket members are coupled to the threads of the threaded rod such the rotation of the rod will cause the pivot arm bracket members to be drawn together or moved apart depending on the direction of rotation of the threaded rod.
Implementation Method 4
A laterally extending rod which is physically cushioned is retained to each pivot arm bracket
Data Source
AI summary
An improved archery bow press used to relieve tension in the bow string of a compound archery bow so that maintenance and repair of the bow string and its components may be safely and easily accomplished. A threaded rod is mounted adjacent and parallel to an elongate beam allowing brackets slidable along the beam to be positioned at differing spacings therebetween. The threaded rod is turned by a crank perpendicularly extending from the threaded rod. Limb engaging arms are hinged to the slidable brackets. Link members are pivotably retained to the limb engaging arms and the link members are retainable to a telescoping part of a screw jack which is retained to the beam. At least one of the link members includes a pin support bracket along its length. The pin support bracket supports a tapered pin extending laterally from the pin support bracket over a bow placed in the bow press. While the bow is urging the limbs around their connections to the bow riser, the bow string may be passed over the pin after which the bow press may relax the limbs and provide tension on the bow string in a position deflected laterally from the plane of the bow riser.