Gate opening device

Details Gate opening device Gate opening device

1989-03-30

1991-09-24

Kannan, Philip C.

Movable or removable closures

Mounted for multidirectional or oblique movement

One direction imparts gravitational bias to swinging...

49245, 49280, E05F 104

Patent

active

050503448

ABSTRACT:
An automatic gate opening device is provided which simultaneously lifts and opens the gate. A drive mechanism forces the gate upward, while a roller bearing following a helical slot in a tube causes rotation of the gate. Hinges are provided which allow simultaneous rotational and linear displacement of the gate.

REFERENCES:
patent: 587847 (1897-08-01), Morris
patent: 989878 (1911-04-01), Sandborg
patent: 1609369 (1926-12-01), Laird
patent: 3820282 (1974-06-01), Kornylak
patent: 3888045 (1975-06-01), Piegza

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