Plant husbandry
Patent
1994-01-10
1995-11-28
Kannan, Philip C.
Plant husbandry
49 49, E05D 1552
Patent
active
054696607
ABSTRACT:
This is a device which will be part of a railroad highway crossing gate system to prevent gate-arms from being knocked out of their support members by contact with vehicles either by accident or on purpose. The device will allow the gate-arm to be pushed out of position with the traffic flow and return to its normal position when released by the vehicle in contact.
REFERENCES:
patent: 1271877 (1918-07-01), Farman
patent: 1665157 (1928-04-01), Dahnke
patent: 1812559 (1931-06-01), Sampson
patent: 2657486 (1953-11-01), Sweetser
patent: 4897960 (1990-02-01), Barviner et al.
Favre Donavan Lee
Kannan Philip C.
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