US 5,134,757 AGranted

Quick release fastener

OwnerCharles R. Johnsoninventor

Life of this patent

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Abstract

A fastener having five parts. A flexible material such as canvas is apertured at a point of connection and a first washer having a boss axially receives the apertures so that the material overlies the washer. The material is held in sandwiched relation between the first washer and a second washer, both of which having gripping surfaces that engage the material. The washers are pressed downwardly by a knob. The knob has a depending central post that releasably engages a lock member that is in turn releasably engaged by a base member that is secured to a support surface. The lock member has a boss part with an annular step that supports the first washer. A pair of flanges extend from a bottom end of the lock member and are engaged by overhanging walls formed in the base member when the knob is turned. The flanges are arcuate so that they resist flattening when the knob is pressed downwardly, and the resistance pushes the washer members upwardly against the downward pushing of the knob, thereby tightly squeezing the material captured between the washer members.

Claims12

Dependent claims

A quick release fastener, comprising:

a base member having a flat bottom wall adapted to be secured to a support surface;
said base member including upstanding side walls mounted about the periphery of said flat bottom wall and further including radially inwardly extending overhanging walls;
a lock member adapted to releasably engaged said base member;
said lock member including an upstanding central boss and a pair of flange members that extend laterally in opposite directions from a bottom end of said boss;
said boss having a central bore formed therein and having internal teeth members formed in said central bore;
a first centrally apertured washer member adapted to circumscribe and to at least partially overlie said lock member;
a second centrally apertured washer member adapted to overlie said first washer member;
and
a knob adapted to releasably engage said lock member and to overlie at least a part of said first and second washer members;
whereby said lock member is engaged to said base member, and item of sheet material to be secured is placed into sandwiched relation between said first and second washer members and said knob is engaged to said lock member to thereby drive said first and second washer members toward one another and hence to tightly secure said sheet material between said first and second washer members.

7 more elements

A fastener for releasably securing a flexible material to a preselected surface, comprising:

a base member having a flat bottom wall, side walls mounted about the periphery thereof and projecting upwardly therefrom, and radially inwardly directed overhanging walls formed at the uppermost free ends of said side walls;
a lock member having a boss part and a pair of flange members that extend laterally in opposite directions from a lower end of said boss part, said flange members being captured beneath said overhanging walls when the fastener is assembled;
a step formed in said boss part, about mid-height thereof, said step dividing said boss part into an upper part having a first diameter and a second part having a second diameter, said first diameter being less than said second diameter;
a first washer having a central aperture of sufficient diameter to axially receive said upper part of said boss part;
said first washer having a boss;
a second washer having a central aperture of sufficient diameter to axially receive said boss of said first washer;
a hand-rotatable knob member having a head and a post that depends from the head;
said boss of said lock member having a central bore formed therein and a plurality of internal teeth members being formed in said central bore;
said post having external teeth formed therein along its extent so that when said post is inserted into said bore, said internal and external teeth compressively engage one another;
said first and second washers having gripping means formed on confronting surfaces thereof so that a flexible material sandwiches therebetween is gripped by said gripping means.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/735,561Filed 25 Jul 1991
Granted: 4 Aug 1992
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

A44B 99/005
Subject matter not provided for in other groups of this subclass: turn-button fasteners
Y10S 24/53
Including receiving member having cavity and mating member having insertable projection guided to interlock thereby: projection or cavity rotates…
Y10T 24/4501
With third detached member completing interlock [e.g., hook type]: quick connect or release [e.g., spring and detent]
Y10T 24/4588
Including member having distinct formations and mating member selectively interlocking therewith: means for mounting projection or cavity portion