Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
U S EXPANSION BOLT CO Inc
Original Assignee
U S EXPANSION BOLT CO Inc
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Filing date
Publication date
Application filed by U S EXPANSION BOLT CO IncfiledCriticalU S EXPANSION BOLT CO Inc
Priority to ES336761ApriorityCriticalpatent/ES336761A1/en
Publication of ES336761A1publicationCriticalpatent/ES336761A1/en
Improvements in the construction of expandable fasteners, of the type comprising an expandable insert of anchoring type and an expander for housing therein, characterized in that said insert is constituted of a hollow body provided with a head at one of its ends and a pair, of extremities at the opposite end; and in that said expander is constituted by a screw-threaded nail, provided with a head with a groove in the free end thereof and a tapered tip in the opposite end, the screw threads of the expander being impossible to be reamed or broadened, because they have a peripheral widening, which diverges as the screw penetrates inside the insert. (Machine-translation by Google Translate, not legally binding)
ES336761A1967-02-131967-02-13Improvements in the construction of expansible braces. (Machine-translation by Google Translate, not legally binding)
ExpiredES336761A1
(en)