Apparatus for compacting or consolidating a freshly surface strip
US3964834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1975 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Jan 27, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/282
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for effecting passes of a self-propelled compacting machine following a spreading machine after the latter has laid a strip of surfacing composition. A guide vehicle is hitched to the spreading machine and is towed therewith, and has a guide member which may either have the contour of a closed geometrical figure such as a circle or be simply a pivot. The compacting machine turns about the guide vehicle along an epicycloidal path of travel. A sensing device on the compacting machine which may be a feeler or a flexible member is responsive to the variations of the radial distance between the compacting machine and guide member. The sensing device operates a limit switch when the variations exceed a predetermined amount which in turn controls an electrically operable hydraulic valve which communicates with a double-action cylinder and piston unit controlling in turn the direction of the front wheel of the compacting machine for increasing or decreasing the turning radius thereof. The compacting machine is thus entirely automatic and needs no driver when in operation. Such a compacting machine is also provided with a conventional steering wheel and can be used independently o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.