Arcuate Nosing and Drip Cap Assembly with Interlocking Hooks

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Solution Overview

Problem

The existing methods for joining arcuate clad window and door frames lack an efficient interface structure, leading to alignment issues, increased maintenance, and susceptibility to water penetration, particularly due to the reliance on screws for alignment and securement, which also compromise aesthetics and incur labor costs.

Innovation Solution

The development of an arcuate nosing assembly where the nosing and drip cap are secured together using inter-engaging hooks and stud receptacles, allowing for self-alignment and permanent locking through bending, eliminating the need for external screws in exposed areas and reducing water ingress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If screws are used to attach drip cap to nosing, then securement is achieved, but alignment precision deteriorates and aesthetic appearance worsens

Engineering Contradiction:

ImprovesecurementVSAvoidalignment precision

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The nosing and drip cap are pre-formed with complementary arcuate configurations during manufacturing. The drip cap is pre-shaped to match the arcuate profile of the nosing, so that when assembled, they naturally align without requiring screws for positioning. This preliminary preparation of geometric compatibility eliminates alignment issues during installation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention removes screws entirely from the attachment system between drip cap and nosing. By extracting the screw fastening mechanism and replacing it with a friction-based friction-fit interface, the solution eliminates the aesthetic drawback of exposed screws while maintaining securement through surface friction and geometric interlocking.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If conventional assembly methods are used, then installation is possible, but water penetration increases

Engineering Contradiction:

ImproveinstallationVSAvoidwater penetration

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A flexible membrane or gasket is introduced between the drip cap and nosing interface. This flexible element conform s to the arcuate surfaces and creates a weather-tight seal that prevents water penetration while accommodating the curved geometry of the assembly. The flexible film fills micro-gaps and ensures continuous contact across the interface.

Inventive Principle:

Principle #30Flexible shells and thin films

3Shape

If arcuate nosing is bent from straight extrusions, then arcuate configuration is achieved, but manufacturing precision deteriorates

Engineering Contradiction:

Improvearcuate configurationVSAvoidconfiguration precision

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

4Strength

If multiple screws are used for attachment, then securement is improved, but device complexity increases

Engineering Contradiction:

ImprovesecurementVSAvoidassembly complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The friction-fit interface enables self-alignment and self-securement of the drip cap to the nosing. The complementary arcuate geometries automatically guide proper positioning during assembly, and the friction between contacting surfaces provides inherent securement without requiring external fasteners or complex alignment procedures.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8528281B2Window and door assembly structures

Publication Date: 2013.09.10 BAY IND INC

AI summary

A nosing and drip cap are mounted to each other by elements of the nosing and drip cap. A hook receptacle and/or a stud receptacle extend the length of the nosing. A cooperating hook and/or stud extend from the drip cap. The drip cap is secured to the nosing by engaging the hook in the hook receptacle and/or the stud in the stud receptacle, in a loose engagement combination. While nosing and drip cap are engaged, the assembly can be secured together by (i) installing fasteners spaced along the length of the assembly or, where hook and hook receptacle are used, (ii) bending the assembly into an arcuate configuration, with the inner flange of the nosing to the inside of the bend. While being bent, the hook and hook receptacle create a tightened locking-type engagement between themselves. Either way, the nosing and the drip cap are substantially permanently locked together.