US4952092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular railing system
Assignee: STANDARD STEEL SECTIONS Inc
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Filing: 1989-04-21
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Granted: 1990-08-28
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Expires: 2009-04-21
Abstract
Abstract A railing system is composed of vertically aligned metal tubes and cross-members which are metal tube rails. The posts are formed with round protruding bosses whose outer diameter (OD) is the same as the outer diameter of the posts. The rails also have the same outer diameter. The bosses and rail ends are brought into roundness, so that they match in a smooth circumferential seam, by round plugs forced into the bosses and rail ends. The post-rail joints may be welded in a circumferential weld; but preferably the posts and rails are joined by bolts connected to the plugs.
Inventors
- 👤 John E. Ballerstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:33
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/18; E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1817; F16B7/04; F16B7/044; F16B7/0446; F16B7/0453; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/345; Y10T403/349; Y10T403/55; Y10T403/557
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A metal tube railing system comprising: (a) a plurality of vertically aligned metal tubular posts each post having an outer diameter and at least one circular annular boss, said boss being formed from said post and being integral therewith and having a flat annular end lip with an outer diameter; (b) a plurality of first tubular metal side rails extending between said posts with each rail having opposite ends, the outer diameter of each of said rails at said rail ends being the same as said outer diameter of said annular end lip of said boss and both ends of each rail having a flat annular edge; (c) a first round metal plug means within each said boss, a second round metal plug means within each said side rail, said first and second metal plug means forcing the respective tubular rail ends and bosses into being more perfectly than without said plug means; (d) joining means to join said side rail flat annular edges and said boss flat annular lips to thereby form circular joints.
Claim 2
Dependent Claim
175 words
A metal tube railing system comprising: (a) a plurality of vertically aligned metal tubular posts each post having an outer diameter and at least one circular annular boss, said boss being formed from said post and being integral therewith and having a flat annular end lip with an outer diameter; (b) a plurality of first tubular metal side rails extending between said posts with each rail having opposite ends, the outer diameter of each of said rails at said rail ends being the same as said outer diameter of said annular end lip of said boss and both ends of each rail having a flat annular edge; (c) a first round metal plug means within each said boss, a second round metal plug means within each said side rail, said first and second metal plug means forcing the respective tubular rail ends and bosses into being more perfectly than without said plug means; (d) joining means to join said side rail flat annular edges and said boss flat annular lips to thereby form circular joints.
Claim 3
Dependent Claim
16 words
A railing system as in claim 1 wherein said side rails are perpendicular to said posts.
Claim 4
Dependent Claim
21 words
A railing system as in claim 1 wherein said side rails are at an angle of about 35° to said posts.
Claim 5
Dependent Claim
66 words
A railing system as in claim 1 wherein at least of said posts has another circular annular boss opposite and aligned with said at least one circular annular boss second side rail is joined to said another circular annular boss; and third metal round plug means is within said second side rail, said third plug means having a screw-threaded hole which is screwed onto said bolt.
Claim 6
Dependent Claim
25 words
A railing system as in claim 1 wherein the outer diameter of the rail ends is the same as the outer diameter of the posts.
Claim 7
Dependent Claim
16 words
A railing system as in claim 1 wherein said joining means comprises a circular ring-like weld.
Claim 8
Dependent Claim
34 words
A railing system as in claim 1 wherein said joining means comprises a bolt connected to each of said first plug means and a screw-threaded hole capturing said bolt in said second plug means.
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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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |