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US4419029A Expired / Lapsed US ⏱️ 0.0 years remaining

Threaded fastener

Assignee: Individual
•
Filing: 1982-03-22
•
Granted: 1983-12-06
•
Expires: 2002-03-22
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Abstract

Abstract A threaded fastener having a self tool movable from an operable position to an out-of-the-way position which includes a threaded shaft, a laterally expanded head having a cavity beneath it surrounding the shaft, holes in either side of the expanded head, a D-ring having its opposite ends in the holes through the sides of the head, and an elastomeric ring such as an O-ring surrounding the threaded shaft and extending partly into the cavity so that when the threaded fastener is screwed into a threaded opening to receive it the O-ring is forced into the cavity when the fastener is tightened providing enough friction to hold the D-ring in its out-of-the-way position. If the object being held with the threaded fastener has a circular cavity having a diameter greater than the diameter of the D-ring, the D-ring, in its out-of-the-way position, will also lie in that recess where it will not interfere with the use of the object being held with the threaded fastener.

Inventors

  • 👤 Michael Wenzel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 07:28
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/16; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/71; Y10T403/7123; Y10T403/75

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 70 words
A threaded fastener comprising a threaded shaft, a laterally expanded head connected to one end of the shaft with said head having a ring-shaped cavity surrounding the threaded shaft and two diametrically opposed openings through the side of said head and into said cavity, a D-ring having opposed ends loosely fitting in said opposed openings, and an elastomeric ring surrounding the threaded shaft and lying partly within said ring-shaped cavity.
Claim 2
Dependent Claim 70 words
A threaded fastener comprising a threaded shaft, a laterally expanded head connected to one end of the shaft with said head having a ring-shaped cavity surrounding the threaded shaft and two diametrically opposed openings through the side of said head and into said cavity, a D-ring having opposed ends loosely fitting in said opposed openings, and an elastomeric ring surrounding the threaded shaft and lying partly within said ring-shaped cavity.
Claim 3
Dependent Claim 12 words
The fastener of claim 1 wherein said elastomeric ring is an O-ring.
Claim 4
Dependent Claim 11 words
The fastener of claim 1 wherein said expanded head is cylindrical.
Claim 5
Dependent Claim 18 words
The fastener of claim 1 wherein said expanded head is provided with a slot to receive a screwdriver.
Claim 6
Independent Claim 130 words
A device comprising two pieces adapted to be held together with a threaded fastener, including a first piece having threaded means to engage the threaded fastener and a second piece having a hole through which the threaded fastener extends, said device including a threaded fastener comprising a threaded shaft, a laterally expanded head connected to one end of the shaft, said head having a ring-shaped cavity surrounding the threaded shaft and two diametrically opposed openings through the side of said head and into said cavity, a D-ring having opposing ends loosely fitted in said opposed openings, an elastomeric ring surrounding the threaded shaft partly within said ring-shaped cavity, a recess in said first piece having a diameter greater than the diameter of said D-ring and deeper than said ring-shaped cavity.
Claim 7
Independent Claim 130 words
A device comprising two pieces adapted to be held together with a threaded fastener, including a first piece having threaded means to engage the threaded fastener and a second piece having a hole through which the threaded fastener extends, said device including a threaded fastener comprising a threaded shaft, a laterally expanded head connected to one end of the shaft, said head having a ring-shaped cavity surrounding the threaded shaft and two diametrically opposed openings through the side of said head and into said cavity, a D-ring having opposing ends loosely fitted in said opposed openings, an elastomeric ring surrounding the threaded shaft partly within said ring-shaped cavity, a recess in said first piece having a diameter greater than the diameter of said D-ring and deeper than said ring-shaped cavity.

References Cited (Backward Citations)

US2102964A Cited
US2798404A Cited
US2752814A Cited
SU573622A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-12-05 1987-06-06 1987-12-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-12-05 1991-06-06 1991-12-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-12-05 1995-06-06 1995-12-06 $7700.00 Window Closed / Lapsed

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