OPENTECHNICAL PUBLICATION OT-2026-000001675 Umbrella holding device Published: 2026-09-15T19:07:34.127490Z Permanent URL: https://opentechnical.org/p/OT-2026-000001675 Categories: Warehousing & Storage Systems > Racking and Shelving ------------------------------------------------------------------------ ABSTRACT An umbrella holding device for securing an umbrella in a patio hole includes a grip nut with a threaded interior and a shoulder, a base with a threaded grip portion and a patio extension, a removable thread sleeve that slides over the patio extension, and a ferrule. The ferrule is inserted into the grip nut and, when the grip nut engages the base, the ferrule is compressed into the funnel-shaped base interior to grip the umbrella shaft. The removable thread sleeve, made of pliable material, slides over the patio extension and compresses against the patio hole when threaded in, creating a friction hold. Multiple thread sleeves of different dimensions and materials can be provided to accommodate various patio hole sizes and conditions. ------------------------------------------------------------------------ OpenTechnical publication OT-2026-000001675 Published 2026-09-15T19:07:34.127490Z https://opentechnical.org/p/OT-2026-000001675