DAVID KEITH SHENK
Pilots in Longmont, CO
License number
Colorado A1727073
Issued Date
Feb 2017
Expiration Date
Feb 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
PO Box 191, Longmont, CO 80544
Professional information
Crane Claw Tilt Sensing And Recovery
US Patent:
5358219, Oct 25, 1994
Filed:
Dec 20, 1991
Appl. No.:
7/812184
Inventors:
David K. Shenk - Niwot CO
Anthony R. Fabrello - Loveland CO
Anthony R. Fabrello - Loveland CO
International Classification:
B66C 1306, B66D 156, A63H 1712
US Classification:
254269
Abstract:
A crane claw tilt switch in addition to a cable tension switch is used to prevent a crane claw from becoming entangled in its suspending cable. When the claw lands on the floor or some other object, it either comes to rest or starts to tilt. If it comes to rest, further lowering creates cable slack, operating the tension switch. If it starts to tilt, the tilt switch operates before the claw tilts enough to allow an arm of the claw to catch on the cable. In response to the operation of either switch, a system processor commands the claw to automatically raise, ensuring that it does not become entangled in its cable.