Traversing hoists – Having means facilitating assembly or disassembly – Of traversing hoist from support
Patent
1984-06-15
1986-10-07
Blix, Trygve M.
Traversing hoists
Having means facilitating assembly or disassembly
Of traversing hoist from support
212180, 212183, B66C 2342
Patent
active
046154507
ABSTRACT:
A pickup truck derrick assembly includes a base frame, a derrick A-frame pivotally mounted on the base frame, a derrick frame erection subassembly, a frame support and locking subassembly and a cable compensation system. The frame erection subassembly includes an elongated track. A roller or carriage subassembly rides on the track and engages the A-frame. Movement of the carriage along the track raises and lowers the A-frame. The A-frame is held in an erected position by support braces pivotally connected at one end to the base frame. Each brace slidably engages a sleeve mounted on the A-frame. A locking mechanism automatically secures the braces to the sleeves when the A-frame is erected. A pulley and cable arrangement including a compensation pulley on a support arm fixed to the A-frame compensates for hoist cable slackening when the A-frame is pivoted to its storage position.
REFERENCES:
patent: 1349635 (1920-08-01), Strauss
patent: 1658873 (1928-02-01), Younkman et al.
patent: 2327461 (1943-08-01), Rowe
patent: 2364851 (1944-12-01), Johansen
patent: 2610743 (1952-09-01), English et al.
patent: 2615538 (1952-10-01), Pelaez
patent: 2616666 (1952-11-01), Honey
patent: 2682957 (1954-07-01), Holmes
patent: 2687809 (1954-08-01), Balogh
patent: 2887191 (1959-05-01), Lovell
patent: 3015374 (1962-01-01), Carbert et al.
patent: 3059781 (1962-10-01), Bender et al.
patent: 3273722 (1966-09-01), Priest et al.
patent: 3276610 (1966-10-01), Thatcher
patent: 3794192 (1974-02-01), Monson
patent: 3797672 (1974-03-01), Vermette
patent: 4068762 (1978-01-01), Kennard, Jr. et al.
Kennard James C.
Kennard, Jr. Dwight C.
Blix Trygve M.
Brahan Thomas J.
LandOfFree
Portable and collapsible derrick structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable and collapsible derrick structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable and collapsible derrick structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-639237