Highway marking sphere dispensing apparatus
US7654770B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Aug 21, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C23/166
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A marking sphere dispensing apparatus for dispensing fluid-assisted marking spheres into pavement marking materials applied to a surface has a frame defining a marking sphere receptacle, a valve seat defining an opening between the marking sphere receptacle and an expulsion duct. A plunger is disposed coaxially to the longitudinal axis of the dispensing apparatus and defines an internal fluid passage for providing pressurized fluid. The plunger is moveable in a longitudinal direction within the marking sphere dispensing frame between a first position at which a plunger head of the plunger is seated against the valve seat to close the opening, and a second position at which the plunger head is axially offset from the valve seat to define a marking sphere inlet gap across the opening. A method for applying marking spheres uses the marking sphere dispensing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.