Title: Quick-acting expansible fastener

Abstract: A fastening device of synthetic resin includes a male member and a female member. The device is capable of fastening objects by simply axially forcing the male member into the female member whereby external threads of the male member threadably engage with internal threads of the female member. In order to unfasten the device, the male member is rotated in an appropriate direction whereby the male member threadably disengages with the female member causing the male member to axially disengage with the female member.

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Inventors: Mizusawa, Akira (Fujisawa, JP)
Notoya, Yoshiaki (Zushi, JP)

Application Number: 06/165401
Filing Date: 1980-07-02
Publication_date: 1983-01-11
Assignee: NIFCO INC (JP)

Primary Class(es): 411/80.200 411/437
Other Classes: F16B13/12; F16B5/02; F16B13/00; F16B13/06
US Patent Ref:

2393606	January, 1946	Brush	411/57	Tapped fastener
3182544	May, 1965	Rapata	411/49	Tuning core grommet
3345899	October, 1967	Fiddler	411/437	Synthetic resin fasteners
3613497	October, 1971	Heldermann	411/60	EXPANSION ANCHOR
3918130	November, 1975	Poe	411/41	Initially one piece removable fastener
3937122	February, 1976	Riedel	411/34	Expanding masonry attachment plug

Other Refs:
Primary Examiner: Britts, Ramon S.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack

Claims: