Apparatus for moving toll bars or the like
US4232484A · kind A · utility
5Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1978 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Dec 20, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F13/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The toll bar of a tollgate is pivotable between horizontal and vertical positions by a reversible electric motor through the medium of a swingable crank gear. A frame for the motor and crank gear is turnable on the shaft for the toll bar and causes a switch to open the motor circuit when the bar encounters excessive resistance to movement toward its horizontal position. The bar is detachably coupled to a holder and causes a switch to actuate an alarm device when it is detached from the holder in response to engagement by a vehicle which passes the tollgate while the bar is away from the vertical position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.