초록 ▼

A safety hole cover particularly useful in providing temporary protection for drilled and augured holes has a flange portion which is placed on the ground surrounding the hole. This flange portion has a circular opening through it; and the diameter of this opening is at least as great as the diamete

A safety hole cover particularly useful in providing temporary protection for drilled and augured holes has a flange portion which is placed on the ground surrounding the hole. This flange portion has a circular opening through it; and the diameter of this opening is at least as great as the diameter of the largest hole to be covered by the hole cover. A domed housing fits over the opening in the flange, and telescoping cylindrical sections are located within the housing. The external diameters of the telescoping cylindrical sections are selected to correspond to the internal diameters of different holes with which the device is to be used. The lowermost (and smallest) cylindrical section has retractable fingers or spikes in it for extension outwardly from the side of the section to engage the side walls of a hole when the device is in place over the hole. The housing provides a visible indication of the presence of the device; and by locking the device in place, removal by vandals is inhibited. The cylindrical sections also protect the integrity of the hole by reducing the potential for collapse of the hole.

대표청구항 ▼

[ What is claimed is:] [1.] A safety hole cover including in combination:a flange member having upper and lower sides for placement over a hole, said flange member having an opening therethrough;a housing secured to said flange member and extending over and covering the opening in said flange member

[ What is claimed is:] [1.] A safety hole cover including in combination:a flange member having upper and lower sides for placement over a hole, said flange member having an opening therethrough;a housing secured to said flange member and extending over and covering the opening in said flange member;a first sleeve with upper and lower ends slidably retained in the opening in said flange member for movement from a storage position in said housing to a use position extending downwardly below the lower side of said flange member through the opening in said flange member into the hole to be covered; andmovable engagement fingers adjacent the lower end of said sleeve for movement from a retracted position within said sleeve to an extended position to engage side walls of the hole when said safety hole cover is in place over the hole.