Lock centers and keys for padlocks

Details Lock centers and keys for padlocks Lock centers and keys for padlocks

1983-08-16

1987-04-21

Wolfe, Robert L.

Locks

Portable

Padlocks

70358, 70367, 70371, 70404, 70409, 70DIG57, E05B 6722

Patent

active

046586067

ABSTRACT:
A new lock center combined with a cylindrical barrel for use in a padlock. The padlock is provided with a key having a plurality of arc-shaped teeth which can engage a corresponding number and shape of slots in the lock center. Two resiliently retained pins located in aligned vertical pin holes in the barrel and lock center prevent relative rotation of the lock center and barrel. However, by inserting and rotating the key in the lock center, the arc-shaped teeth of the key engage the pins and align the line of contact between the two pins with the line of contact between the lock center and the cylindrical barrel, thereby permitting the lock center to rotate relative to the barrel. Upon rotation of the lock center, the thinner shoulder of the upper part of the lock center is rotated between two steel balls, which then can roll out of contact with the lock shackle toward the thinner shoulder and permit the shackle to be open by spring pressure.

REFERENCES:
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patent: 3855824 (1974-12-01), Falk
patent: 4321811 (1982-03-01), Ziegler
patent: 4341102 (1982-07-01), Ku et al.
patent: 4351171 (1982-09-01), Tsui
patent: 4407147 (1983-10-01), Larson
patent: 4445347 (1984-05-01), Tseng

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