US3842877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick fastening screw device
Assignee: Individual
•
Filing: 1972-06-05
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Granted: 1974-10-22
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Expires: 1992-06-05
Abstract
Abstract A quick fastening device including a screw having an elongated shank with threaded sectors alternating with flat or chord surfaces; and also including a corresponding female member having a hole with threaded sectors alternated with unthreaded sectors wherein the threads have been omitted. To quickly attach the screw to the female member, the screw is inserted into the hole to a depth sufficient to bring portions of the threads of the shank and female member in positions for engagement; and then, the screw is given a partial turn to cause the threads to engage and become secured to each other. The external threads of the screw, and the internal threads of the hole terminate in beveled surfaces such that the threads will be self-aligning when the screw is secured by a partial turn. The hole of the female member may be oval or otherwise distorted from a true circle whereby the screw will bind or clamp in the secured position when given the partial turn; and one of the members may be resilient to enable it to frictionally grip the other and to return to its original condition upon removal of the other from engagement therewith.
Inventors
- 👤 A Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:30
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/08; F16B37/0807; F16B37/085; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
306 words
A combination of a screw member and a female member having a bore for receiving said screw member; said screw member comprising a shank having a duality of threaded sectors and a duality of flat surfaces extending longitudinally of said shank and being chords which cut off cylindrical portions of said shank between said threaded sectors; said bore having a duality of threaded sectors with internal threads complementary to and engageable by the threads of said shank, and a corresponding duality of unthreaded sectors interposed between and alternating with said threaded sectors, said unthreaded sectors extending longitudinally of said bore; said bore of the female member having a long diameter and a short diameter to form an oval in cross section, said unthreaded sectors extending longitudinally along said bore at the long diameter thereof, and said threaded sectors being positioned along the short diameter of said bore, the shank of said screw being insertable into said bore with the threaded sectors of said screw being aligned transversely with the long diameter of said bore and without engagement between the threads of the shank and threads of the bore, the transverse length of the shank being greater than the shorter diameter of the bore to the extent that rotation of the shank in the bore will be limited when the threaded portions of the members are engaged with each other; said threaded sectors of the female member being of greater arcuate width than the threaded sectors of the shank and being spaced from each other circumferentially sufficient to permit the threaded portions of the same member to pass longitudinally therebetween; said threaded portions of both members have threads with their transverse ends beveled along the upper and lower surfaces of each thread, the upper and lower bevels formed thereby meeting at a radially extending relatively sharp edge.
Claim 2
Dependent Claim
306 words
A combination of a screw member and a female member having a bore for receiving said screw member; said screw member comprising a shank having a duality of threaded sectors and a duality of flat surfaces extending longitudinally of said shank and being chords which cut off cylindrical portions of said shank between said threaded sectors; said bore having a duality of threaded sectors with internal threads complementary to and engageable by the threads of said shank, and a corresponding duality of unthreaded sectors interposed between and alternating with said threaded sectors, said unthreaded sectors extending longitudinally of said bore; said bore of the female member having a long diameter and a short diameter to form an oval in cross section, said unthreaded sectors extending longitudinally along said bore at the long diameter thereof, and said threaded sectors being positioned along the short diameter of said bore, the shank of said screw being insertable into said bore with the threaded sectors of said screw being aligned transversely with the long diameter of said bore and without engagement between the threads of the shank and threads of the bore, the transverse length of the shank being greater than the shorter diameter of the bore to the extent that rotation of the shank in the bore will be limited when the threaded portions of the members are engaged with each other; said threaded sectors of the female member being of greater arcuate width than the threaded sectors of the shank and being spaced from each other circumferentially sufficient to permit the threaded portions of the same member to pass longitudinally therebetween; said threaded portions of both members have threads with their transverse ends beveled along the upper and lower surfaces of each thread, the upper and lower bevels formed thereby meeting at a radially extending relatively sharp edge.
Claim 3
Dependent Claim
77 words
The combination of a screw member and a female member in accordance with claim 1 wherein the threads of said screw member are resilient and the diameter of the cylinder defined by the threaded sectors thereof is slightly greater than the short diameter of said bore defined by the threaded sectors thereof such that a resilient binding action will occur when the threads of one member are moved into engagement with the threads of the other member.
Claim 4
Dependent Claim
66 words
The combination of a screw member and a female member in accordance with claim 1 wherein the diameter of the cylinder defined by the screw member is greater than the short diameter of said bore defined by the threaded sectors thereof such that rotation of the screw member in the bore will be prevented when the threaded portions of the members are in substantial longitudinal alignment.
Claim 5
Dependent Claim
310 words
A combination of a screw member and a female member having a bore for receiving said screw member; said screw member comprising a shank having a plurality of threaded sectors and a plurality of flat surfaces extending longitudinally of said shank and being chords which cut off cylindrical portions of said shank between said threaded sectors; said bore having a plurality of threaded sectors with internal threads compLementary to and engageable by the threads of said shank, and a corresponding plurality of unthreaded sectors interposed between and alternating with said threaded sectors, said unthreaded sectors extending longitudinally of said bore and extending radially at least to the major diameter of said internal threads; the threads of at least the screw member being resilient and the diameter of the cylinder defined by the threaded sectors of the screw member being slightly greater than the diameter of the cylinder defined by the threaded sectors of the female member such that a resilient binding action will occur when the threads of one member are moved into engagement with the threads of the other member; the shank of said screw member being operable to be inserted into said bore to a depth wherein said members are in transverse alignment whereupon said screw member may be turned to cause the threaded sectors of the shank to engage the threaded sectors of the bore to secure the members to each other; said threaded sectors of the female member being of a greater arcuate width than the threaded sectors of the shank and being spaced from each other circumferentially sufficient to permit the threaded portions of the same member to pass longitudinally therebetween; said threaded portions of both members have threads with their transverse ends beveled along the upper and lower surfaces of each thread, the upper and lower bevels formed thereby meeting at a sharp edge.
Claim 6
Dependent Claim
310 words
A combination of a screw member and a female member having a bore for receiving said screw member; said screw member comprising a shank having a plurality of threaded sectors and a plurality of flat surfaces extending longitudinally of said shank and being chords which cut off cylindrical portions of said shank between said threaded sectors; said bore having a plurality of threaded sectors with internal threads compLementary to and engageable by the threads of said shank, and a corresponding plurality of unthreaded sectors interposed between and alternating with said threaded sectors, said unthreaded sectors extending longitudinally of said bore and extending radially at least to the major diameter of said internal threads; the threads of at least the screw member being resilient and the diameter of the cylinder defined by the threaded sectors of the screw member being slightly greater than the diameter of the cylinder defined by the threaded sectors of the female member such that a resilient binding action will occur when the threads of one member are moved into engagement with the threads of the other member; the shank of said screw member being operable to be inserted into said bore to a depth wherein said members are in transverse alignment whereupon said screw member may be turned to cause the threaded sectors of the shank to engage the threaded sectors of the bore to secure the members to each other; said threaded sectors of the female member being of a greater arcuate width than the threaded sectors of the shank and being spaced from each other circumferentially sufficient to permit the threaded portions of the same member to pass longitudinally therebetween; said threaded portions of both members have threads with their transverse ends beveled along the upper and lower surfaces of each thread, the upper and lower bevels formed thereby meeting at a sharp edge.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |