US5046879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforated connecting disk for scaffolding elements
Assignee: Individual
•
Filing: 1990-03-26
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Granted: 1991-09-10
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Expires: 2010-03-26
Abstract
Abstract A scaffolding arrangement including a perforated disk having a central bore for accommodating an upright scaffolding element. The perforated conencting disk includes a plurality of alternately arranged large and small wedge accommodating holes, with the small wedge accommodating holes having a wedge contact surface forming a continuous curve which is symmetrical with respect to a radius which passes through a middle of the wedge contact surface of the respective small wedge holes.
Inventors
- 👤 Ruth Langer nee Layher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:27
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/30; E04G7/32; E04G7/302; E04G7/306; E04G7/307; Y; Y10; Y10T; Y10T403/00; Y10T403/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A perforated disk for accommodating connecting devices for scaffolding elements comprising a plurality of first hole means for accommodating fastening wedges, and a plurality of second hole means smaller than said first hole means for accommodating fastening wedges, said plurality of second hole means each including a substantially flat wedge contact surface provided at an outer circumference thereof and adapted to be disposed in a vertical direction in an installation position of the perforated disk, wherein a contour of each of the plurality of small hole means, with the exception of the wedge contact surface, is formed as a continuous curve symmetrical with respect to a radius passing through a mid point of the wedge contact surface.
Claim 2
Dependent Claim
117 words
A perforated disk for accommodating connecting devices for scaffolding elements comprising a plurality of first hole means for accommodating fastening wedges, and a plurality of second hole means smaller than said first hole means for accommodating fastening wedges, said plurality of second hole means each including a substantially flat wedge contact surface provided at an outer circumference thereof and adapted to be disposed in a vertical direction in an installation position of the perforated disk, wherein a contour of each of the plurality of small hole means, with the exception of the wedge contact surface, is formed as a continuous curve symmetrical with respect to a radius passing through a mid point of the wedge contact surface.
Claim 3
Dependent Claim
31 words
A perforated disk according to claim 1, wherein said contact surface has a circumferential width wider than a thickness of the wedge only by an amount of play required for installation.
Claim 4
Dependent Claim
26 words
A perforated disk according to claim 2, wherein each of said plurality of second hole means has a substantially oval shape markedly tapering at one end.
Claim 5
Dependent Claim
54 words
A perforated disk according to claim 2, wherein each of said small hole means has an inner area opposite said contact surface of a substantially cylindrical cross section and continuous transition areas on respective sides of said inner area to side areas extending from said inner area to respective ends of the contact surface.
Claim 6
Dependent Claim
26 words
A perforated disk according to claim 4, wherein said side areas are each of a larger radius than a radius of the cylindrical cross-sectional inner area.
Claim 7
Dependent Claim
48 words
A perforated disk according to claim 1, wherein each of the plurality of small hole means has an approximately pear-shape, with an inner area which is substantially cylindrical and adjacent a center of the perforated disk, said area making a continuous transition to side areas with larger radii.
Claim 8
Dependent Claim
30 words
A perforated disk according to claim 6, wherein the perforated disk is adapted to be fastened on vertical scaffolding elements including upright elements, bracing elements, intermediate parts, and special parts.
Claim 9
Dependent Claim
18 words
A perforated disk according to claim 7, wherein the wedges include wedge-shaped tapering connecting heads with push-through wedges.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |