公开(公告)号：US3470420A

公开(公告)日：1969-09-30

申请号：US3470420D

申请日：1967-06-01

Applicant: SMITH CORP A O

Inventor： MARKS LAWRENCE P

IPC: H05K7/14 ,  H02B1/04 ,  H02B9/00

CPC classification number: H05K7/1425

公开(公告)号：US3580187A

公开(公告)日：1971-05-25

申请号：US3580187D

申请日：1968-07-02

Applicant: SMITH CORP A O

Inventor： MARKS LAWRENCE P

IPC: B61D45/00 ,  B60P7/08

CPC classification number: B61D45/002

Abstract: The present disclosure relates to tiedown means. A stack of vehicle frames are mounted on a bed. A box beam is disposed over the frames or integrated into the bed. A pair of parallel torsion shafts having a high spring rate are mounted in the box beam. The first shaft is fixed at one end to the beam end wall and protrudes from the opposite wall. A crank is secured to the free end of the first bar and disposed between a pair of stop elements on the end wall. The shaft is prestressed to engage the one stop with a selected stored energy with the holding rotation of the arm increasing the stress. The second shaft is similarly constructed, but oppositely disposed to dispose the crank to the opposite end of the assembly. Suitable straps or chains are interconnected to the cranks to clamp the load to the bed. A one-way locking means selectively limits the movement of the crank to prevent pivoting and increasing the shaft stress after the initial setting.