Patent US5079884A successfully refreshed from Google Patents.
US5079884A
Expired / Lapsed
US
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Extendible interconnected Z-studs
Assignee: National Gypsum Co
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Filing: 1990-06-04
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Granted: 1992-01-14
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Expires: 2010-06-04
Abstract
Abstract An extendible stud, consisting of two substantially identical Z-studs each of which has opposed flanges of substantially different widths and inwardly turned lips at the flange outer edges, and each Z-stud having a central raised ridge in its web, raised in a direction toward the wider flange, which two Z-studs are interconnected by the narrow flange of each being held within the channel formed by the wider flange of the other Z-stud along with its associated lip and web. Also the method of interconnecting two Z-studs and the method of erecting hollow partitions with the extendible stud.
Inventors
- 👤 Robert J. Menchetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:43
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/30; E04C3/32; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854; E04B2/7881
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 words
A sheet metal Z-stud, adapted for interconnecting with a like Z-stud to form an extendible stud, said Z-stud comprising an elongate central web, an elongate relatively wide flange extending at an angle from one elongate edge of said web, an elongate relatively narrow flange extending at an equal angle from an opposite elongate edge of said web and extending in an opposite direction from said web, an elongate narrow lip extending inwardly at an angle from an outer edge on at least the wider of said flange, said lip forming a narrow-mouthed channel with said respective flanges and said web, and an elongate central raised ridge extending outwardly from said web, toward said relatively wide flange.
Claim 2
Dependent Claim
116 words
A sheet metal Z-stud, adapted for interconnecting with a like Z-stud to form an extendible stud, said Z-stud comprising an elongate central web, an elongate relatively wide flange extending at an angle from one elongate edge of said web, an elongate relatively narrow flange extending at an equal angle from an opposite elongate edge of said web and extending in an opposite direction from said web, an elongate narrow lip extending inwardly at an angle from an outer edge on at least the wider of said flange, said lip forming a narrow-mouthed channel with said respective flanges and said web, and an elongate central raised ridge extending outwardly from said web, toward said relatively wide flange.
Claim 3
Dependent Claim
34 words
A sheet metal Z-stud as defined in claim 1 wherein said relatively wide flange is wider than said relatively narrow flange by a distance equal to about twice the height of said raised ridge.
Claim 4
Dependent Claim
35 words
A sheet metal Z-stud as defined in claim 1 wherein said narrow-mouthed channel is formed as a result of the total of the two angles at each edge of said flange being less than 180°.
Claim 5
Dependent Claim
22 words
A sheet metal Z-stud as defined in claim 1 wherein said web forms an angle of about 60° with each said flange.
Claim 6
Dependent Claim
26 words
A sheet metal Z-stud as defined in claim 1 wherein said flanges each have narrow lips which make an angle of about 85° with said flanges.
Claim 7
Dependent Claim
24 words
A sheet metal Z-stud as defined in claim 1 wherein said central raised ridge is about 1/2 inch wide and about 1/8 inch high.
Claim 8
Dependent Claim
22 words
A sheet metal Z-stud as defined in claim 1 wherein said Z-stud is formed of galvanized steel of about 0.02 inch thickness.
Claim 9
Dependent Claim
47 words
An extendible stud consisting essentially of two Z-studs, each said Z-stud having the structure of claim 1, said Z-studs being interconnected with said narrow flange of each said Z-stud being disposed in said narrow-mouthed channel formed by said wide flange of the other of said two Z-studs.
Claim 10
Dependent Claim
36 words
An extendible stud as defined in claim 8 wherein said raised ridge on each said Z-stud protrudes from said Z-stud web towards said other Z-stud raised ridge and said raised ribs are disposed abutting one another.
Claim 11
Dependent Claim
16 words
An extendible stud as defined in claim 8 wherein said two Z-studs are of equal length.
Claim 12
Dependent Claim
39 words
An extendible Z-stud as defined in claim 8 wherein said relatively wide flanges are wider than said relatively narrow flanges by a distance equal to about the sum of the heights of said raised ridges of said two Z-studs.
Claim 13
Dependent Claim
68 words
A hollow partition comprising a floor track, a plurality of extendible studs as defined in claim 8, and a plurality of wallboards affixed to said flanges of said extendible studs, said extendible studs having one of said two Z-studs extending vertically downward and engaging said floor track and another of said two Z-studs extending vertically upward and engaging means for holding said extendible stud in a vertical position.
Claim 14
Dependent Claim
34 words
A hollow partition as defined in claim 12 wherein said web of each of said Z-studs in each of said extendible studs forms an angle of substantially less than 90° with said Z-stud flanges.
Claim 15
Dependent Claim
44 words
A hollow partition as defined in claim 12 wherein said wallboards are affixed to said flanges by screws and wherein at least one of said screws, at each extendible stud, is screwed through an overlapping portion of the two Z-studs of said extendible stud.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |