학술논문
Beach umbrella with built-in hole digger
Document Type
Patent
Author
Source
Subject
Language
Abstract
A beach umbrella with a built-in sand hole digging apparatus. The digging apparatus includes a tube and a piston. The tube includes an interior sidewall forming a hollow core. The tube further includes a top end forming a top opening and a bottom end forming a bottom opening. The piston includes an elongated rod. The elongated rod includes a top end protruding from the top opening of the tube. A head is attached to the bottom end of the piston. The head is disposed within the hollow core of the tube and is slidably engaged with the sidewall.