US5098239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover cap for a hexagonal recess
Assignee: Individual
•
Filing: 1991-07-02
•
Granted: 1992-03-24
•
Expires: 2011-07-02
Abstract
Abstract A cover cap for a hexagonal recess in a screw head with an annular wall engaging in the recess. On the outer side an axial rib is provided, with the diametrical clearance between the outer edge of this rib and the diametrically opposed convex surface line of the outer side of the annular wall being greater than the flank clearance between opposing flank walls of the hexagonal recess.
Inventors
- 👤 Horst Thiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:23
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/14; F16B23/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A cover cap for a hexagonal recess in a screw head, said cover cap comprising: an annular wall capable of engaging said hexagonal recess, said annular wall having an outer side with an axial rib being provided on said outer side with a diametrical clearance between an outside edge of said axial rib and a diametrically opposed convex surface line of said outer side of said annular wall being greater than the flank clearance between opposed flank walls of said hexagonal recess, said outer side of said annular wall further including two additional ribs being located symmetrically to a diameter line passing through said axial rib with one of said two additional ribs being located on each side of the diameter line at an angular distance of 30° at the circumference relative to the diameter line.
Claim 2
Dependent Claim
136 words
A cover cap for a hexagonal recess in a screw head, said cover cap comprising: an annular wall capable of engaging said hexagonal recess, said annular wall having an outer side with an axial rib being provided on said outer side with a diametrical clearance between an outside edge of said axial rib and a diametrically opposed convex surface line of said outer side of said annular wall being greater than the flank clearance between opposed flank walls of said hexagonal recess, said outer side of said annular wall further including two additional ribs being located symmetrically to a diameter line passing through said axial rib with one of said two additional ribs being located on each side of the diameter line at an angular distance of 30° at the circumference relative to the diameter line.
Claim 3
Dependent Claim
31 words
The cover cap for a hexagonal recess according to claim 1, said axial rib has a diametrical clearance which is approximately 5% greater than the flank clearance of said hexagonal recess.
Claim 4
Dependent Claim
37 words
The cover cap for a hexagonal recess according to claim 1, wherein said two additional ribs have a diametrical clearance from their diametrically opposed convex surface line which corresponds to the flank clearance of said hexagonal recess.
Claim 5
Dependent Claim
38 words
The cover cap for a hexagonal recess according to claim 1, wherein said two additional ribs have a diametrical clearance from their diametrically opposed convex surface line which is less than the flank clearance of said hexagonal recess.
Claim 6
Dependent Claim
30 words
The cover cap for a hexagonal recess according to claim 1, wherein said annular wall has an external diameter which is smaller than the flank clearance of said hexagonal recess.
Claim 7
Dependent Claim
30 words
The cover cap for a hexagonal recess according to claim 1, said cover cap further including a head wall having a slot for a tool for turning said cover cap.
References Cited (Backward Citations)
US2551834A
Cited
GB678839A
Cited
GB916161A
Cited
GB920221A
Cited
GB925314A
Cited
DE2461138A1
Cited
GB2203510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |