Closure fasteners – Bolts – Sliding
Patent
1973-12-03
1976-02-17
Wolfe, Robert L.
Closure fasteners
Bolts
Sliding
292155, E05C 104
Patent
active
039388379
ABSTRACT:
A safety lock for enclosures having a first lock portion attached to the first of two members to be locked together. This lock portion includes a bolt rotatable for accomplishing a locking function. The bolt has a head of non-conventional shape. A second lock portion is attached to the other of the members to be locked together and is engageable by the bolt. The first lock portion includes a protective wall peripherally surrounding the bolt head and open at its outer end. The surrounding wall defines a socket which is at least as deep as the thickness of the bolt head to prevent side engagement of the bolt head and which is of greater diameter than the bolt head to permit removal of the bolt by a special wrench inserted through the open end of the protective wall. The second lock portion in one embodiment includes a pin having a radial notch intermediate its ends engageable by the bolt to provide a more positive lock. Also, in some embodiments, the pin projects beyond the first lock portion and receives a padlock or the end of the pin may project into a socket member to conceal the end thereof. A further locking feature may employ a spring acting on one of the lock portions with a force great enough to prevent children from opening the lock even though other fastening means of the lock are released.
REFERENCES:
patent: 524146 (1894-08-01), Hottes
patent: 3083046 (1963-03-01), Eberly
patent: 3791683 (1974-02-01), Bright
Eckelman Eugene M.
Wolfe Robert L.
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