Freight accommodation on freight carrier – Particular article accommodation – Grouped
Patent
1994-09-13
1996-10-22
Merritt, Karen
Freight accommodation on freight carrier
Particular article accommodation
Grouped
410 37, 410 81, 411 4, 403 2, B60P 712
Patent
active
055670962
ABSTRACT:
Embodiments of a log bunk shear-pin system are shown and described, each embodiment including a shear-pin that engages a log bunk and prevents the bunk from swiveling when the truck is being loaded or unloaded, but that releases the bunk when the shear-pin is mistakenly left engaged during travel. The shear-pin shears, or otherwise comes apart, when the power of the log load or the turning tractor forces the bunk to swivel relative to the tractor or trailer. The preferred shear-pin comprises a shoulder pin and a pin cap connected with a threaded insert. When the forces of a swiveling bunk push on the pin cap and the shoulder pin sideways in opposite directions, the insert breaks. A new insert may then be easily installed into the undamaged pin cap and shoulder pin. Thus, the shear-pin prevents damage to the bunk-ears and only allows damage of an inexpensive and replaceable portion of the shear-pin.
REFERENCES:
patent: 1799628 (1931-04-01), Knowles
patent: 1915009 (1933-06-01), Bassetti
patent: 4078636 (1978-03-01), Yamanaka
patent: 4193730 (1980-03-01), Nordin
patent: 4269426 (1981-05-01), Bhushan
patent: 4894043 (1990-01-01), Nixon, Jr.
patent: 5199149 (1933-04-01), Matsuura
patent: 5292215 (1994-03-01), Roberts
Gordon Stephen
Merritt Karen
Pedersen Barbara S.
Pedersen Ken J.
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