The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2009
Filed:
May. 11, 2007
Julian P. Trangsrud, Northfield, MN (US);
Julian P. Trangsrud, Northfield, MN (US);
Other;
Abstract
A pullbox assembly for use in wiring having an upwardly tapered cylindrical main body having a larger diameter base than top for preventing upward movement of the pullbox when installed in the ground due to frost or soil conditions. The taper of the pullbox allows fill to be placed all around the pullbox easily. The pullbox may have a base with apertures, or a ledge at the base's rim, for allowing fill to exit when lifting the pullbox to a desired height in a hole. The fill exiting the base of the pullbox forms a smooth, even base for the pullbox when the pullbox is rotated in the hole. The apertures in the base also act as drainholes for letting water in and out and preventing groundwater from lifting the pullbox after installation. A strong lightweight plastic cover can be used to cover the pullbox for street traffic use.