Movable or removable closures – With traffic director or controller; e.g. – one-way
Patent
1974-09-19
1976-07-13
Kannan, Philip C.
Movable or removable closures
With traffic director or controller; e.g., one-way
E01F 1300
Patent
active
039685969
ABSTRACT:
A vehicle barrier of the type which will temporarily prevent an unauthorized vehicle from entering a given parking space or from passing through the entrance to any given area. An upright support is situated beside the path along which a vehicle will normally travel, and an elongated barrier arm has a blocking position extending laterally from the upright support across the path which otherwise would be travelled by the vehicle so as to prevent the latter from travelling along this path. A connecting structure connects the barrier arm to the upright support for swinging movement about a substantially horizontal axis between the blocking position extending across the above path and a substantially vertical non-blocking position extending along the upright support, with the horizontal axis around which the arm turns being situated at the region of a lower end thereof when the arm extends vertically in its non-blocking position, this arm swinging down from its non-blocking to its blocking position and up from its blocking to its non-blocking position while turning around the above axis.
REFERENCES:
patent: 2015607 (1935-09-01), Shinn
patent: 2874819 (1959-02-01), Nutter
patent: 3484992 (1969-12-01), Blumenthal
patent: 3691685 (1972-09-01), Danin
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