Patent US4146212A successfully refreshed from Google Patents.
US4146212A
Expired / Lapsed
US
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Metal railing
Assignee: Individual
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Filing: 1977-06-06
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Granted: 1979-03-27
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Expires: 1997-06-06
Abstract
Abstract A metal railing comprises railing sections. Each railing section has an upper hollow handrail, and a lower hollow girder. A center post joins the handrail and the lower girder, and a plurality of filler posts extend between and into the upper handrail and lower girder on each side of the center post. The filler posts are interconnected within the upper handrail and the lower girder by long pins. The railing sections are movably connected to coupling posts or end posts. A cable extends through the upper handrail and is clamped at the coupler posts and at the end posts.
Inventors
- 👤 Willi Lermer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:24
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E01; E01D; E01D19/00; E01D19/10; E01D19/103; E01F; E01F15/00; E01F15/02; E01F15/025; E04F11/1836; E04F2011/1868; E04F2011/1882
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
249 words
A heavy duty metal railing including at least one railing section comprising a hollow upper rail having a lower inner wall, cable means received in said hollow upper rail, at least one hollow lower girder spaced from said upper rail and having an upper inner wall, a center post extending between said upper rail and lower girder, and a plurality of filler bars spaced on each side of said center post, said filler bars having upper ends extending into said upper rail and lower ends extending into said lower girder, a first elongated pin means extending longitudinally in said upper rail and through each end of each filler bar as well as in contact with said lower inner wall of said upper rail of a railing section, a second elongated pin means extending longitudinally in said lower girder and through each lower end of each filler bar as well as in contact with said upper inner wall of said lower girder of a railing section, said first and second pin means interconnecting all the filler bars on the respective side of the center post by a wedging action against the respective inner wall defining a clamping surface to thereby provide a chain formation, in which said filler bars are positively connected to each other through said pin means in a force transmitting manner and whereby said upper rail and said lower girder are also integrated into said chain formation and coupled to each other in a force transmitting manner.
Claim 2
Dependent Claim
249 words
A heavy duty metal railing including at least one railing section comprising a hollow upper rail having a lower inner wall, cable means received in said hollow upper rail, at least one hollow lower girder spaced from said upper rail and having an upper inner wall, a center post extending between said upper rail and lower girder, and a plurality of filler bars spaced on each side of said center post, said filler bars having upper ends extending into said upper rail and lower ends extending into said lower girder, a first elongated pin means extending longitudinally in said upper rail and through each end of each filler bar as well as in contact with said lower inner wall of said upper rail of a railing section, a second elongated pin means extending longitudinally in said lower girder and through each lower end of each filler bar as well as in contact with said upper inner wall of said lower girder of a railing section, said first and second pin means interconnecting all the filler bars on the respective side of the center post by a wedging action against the respective inner wall defining a clamping surface to thereby provide a chain formation, in which said filler bars are positively connected to each other through said pin means in a force transmitting manner and whereby said upper rail and said lower girder are also integrated into said chain formation and coupled to each other in a force transmitting manner.
Claim 3
Dependent Claim
41 words
The metal railing of claim 1, in which said filler bars have corss-sectional dimensions such that tensile forces therein effect an elongation of said filler bars prior to bending of the respective clamping surfaces of said upper rail and lower girder.
Claim 4
Dependent Claim
46 words
The metal railing of claim 1, further comprising a post coupled to an end of said railing section and defining a joint at said upper rail, and further comprising a cable extending through said upper rail, and clamping means at said joint for clamping said cable.
Claim 5
Dependent Claim
26 words
The metal railing of claim 3, wherein said clamping means is adjustable, whereby said cable may slip under tensile loads exceeding a given, adjustable clamping force.
Claim 6
Dependent Claim
93 words
The metal railing of claim 1, wherein a cable extends through said upper rail, said cable extending along the side of said filler bars, and further comprising additional filler bars at the ends of said section away from said center post, said additional filler bars being connected to said first mentioned filler bars by said pen means, the upper ends of said additional filler bars being spaced from said upper inner wall surfaces of said upper rail, whereby said cable may extend between said additional filler bars and said upper inner wall surface.
Claim 7
Dependent Claim
60 words
The metal railing of claim 1, further comprising an end post coupled to one end of said railing section, said end post having a solid rectangular vertical element, said cable being deflected 90° from said upper rail to extend vertically along said end post, and clamping means arranged on said end post for clamping said cable against said end post.
Claim 8
Dependent Claim
27 words
The metal railing of claim 1, further comprising a protective means at least partially surrounding said cable, said protective means comprising an integral part of said handrail.
Claim 9
Dependent Claim
16 words
The metal railing of claim 1, wherein said upper rail comprises a closed metal tubular section.
Claim 10
Dependent Claim
25 words
The metal railing of claim 1, wherein said upper rail comprises separate upper and lower portions and means operatively interconnecting said upper and lower portions.
Claim 11
Dependent Claim
104 words
The metal railing of claim 9, wherein said upper rail portion has a stop shoulder for engaging said lower rail portion, said lower rail portion having a central groove, and further comprising a clamping element having outer grooves with support flanks and a central tongue extending into said central groove of said lower rail portion, said support flanks of said outer grooves of said clamping element being staggered in the longitudinal rail direction, said central tongue extending between said supporting flanks, said interconnectng means including bolt means for securing said lower portion to said clamping element for clamping said upper and lower portions together.
Claim 12
Dependent Claim
23 words
The metal railing of claim 10, wherein said clamping element comprises a clamping plate extending obliquely to the longitudinal direction of said railing.
Claim 13
Dependent Claim
16 words
The metal railing of claim 10, wherein said bolt means extend through the lower rail portion.
References Cited (Backward Citations)
US2576527A
Cited
US2557002A
Cited
US2576055A
Cited
US2808233A
Cited
US2869829A
Cited
US3313527A
Cited
US3921960A
Cited
US3733055A
Cited
US3962774A
Cited
DE2606428A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |