Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1986-02-03
1988-08-09
Wilson, Neill
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411187, 411310, 411437, 411908, 411544, F16B 1304, F16B 3716
Patent
active
047624507
ABSTRACT:
A molded plastic one-piece hollow expansion nut comprises an outwardly expandable shank which is insertable through a panel hole and a head at one end of the shank for engaging the panel surface. A screw-receiving bore extends axially through the nut and receives the threaded shank of a screw whose screw head bears against the nut head. The portion of the bore along which shank wall expansion occurs is cylindrical and of slightly larger diameter than the screw thread. The inmost end of the bore is of oblong cross-section and its minor axis is shorter than the diameter of the screw thread. A single screw-engaging thread in the cylindrical bore initially holds and guides the screw. The shank walls opposite the ends of the minor axis have oblique screw-thread receiving slots therethrough which define very sturdy damage resistant nut threads which engage the screw thread. Rotational insertion of the screw draws the insertion end of the nut shank toward the nut head and effects shank expansion to thereby secure the nut in the panel hole. In some embodiments, interengageable components on the nut and on the screw interengage to prevent further screw rotation after the nut reaches fully expanded condition. In some embodiments, ratchet teeth on the screw thread and nut slots engage to prevent screw removal.
REFERENCES:
patent: Re27678 (1973-06-01), Orlomoski
patent: 986510 (1911-03-01), Scott
patent: 1872166 (1932-08-01), Muhlig
patent: 2148977 (1939-02-01), Buck
patent: 2389278 (1945-11-01), Simmons
patent: 2409352 (1946-10-01), Gill
patent: 2461397 (1949-02-01), Ross
patent: 2484644 (1949-10-01), Poupitch
patent: 2487296 (1949-11-01), Bergstrom
patent: 2562032 (1951-07-01), Gutensohn
patent: 2670021 (1954-02-01), Torresen
patent: 2762252 (1956-09-01), Karitzky
patent: 2833326 (1958-05-01), Knohl
patent: 3174387 (1965-03-01), Fischer
patent: 3255797 (1966-06-01), Attwood
patent: 3365999 (1968-01-01), Perlin
patent: 3385156 (1968-05-01), Polos
patent: 3438417 (1969-04-01), Albris
patent: 3937122 (1976-02-01), Riedel
patent: 4571136 (1986-02-01), Peek
Bart Joseph
Schwind Richard J.
Wollar Burnell
Kirby Thomas F.
Nilles James E.
Phillips Plastics Corp.
Wilson Neill
LandOfFree
Damage resistant plastic expansion nut and screw therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Damage resistant plastic expansion nut and screw therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damage resistant plastic expansion nut and screw therefor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-915822