Patent US4289303A successfully refreshed from Google Patents.
US4289303A
Expired / Lapsed
US
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Hand-rail element for staircase
Assignee: Individual
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Filing: 1979-07-12
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Granted: 1981-09-15
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Expires: 1999-07-12
Abstract
Abstract A hand-rail element has a metal pipe core, which is easily bent, and a soft plastic foam surrounding the pipe and having an outer surface contoured to simulate leather graining or the like. Several elements can be joined end-to-end by means of threaded nipples, and a hand-rail support is also disclosed, which permits assembly of these parts by a worker who need only use a portable power drill for on-site installation.
Inventors
- 👤 Wilfried Hamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:41
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/1802; E04F11/1808
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
A hand-rail assembly for a staircase comprising a plurality of hand-rail elements, each element having a soft metal core of tubular shape with a thin side wall thickness such that the metal core is easily bent by hand, each element having a pliable foamed polyurethane covering surrounding said tubular core and having a thickness at least approximately equal to the diameter of said core, a plurality of nipples connecting said hand-rail elements end-to-end, each nipple having opposed male threaded portions threadably received in the adjacent end portions of two end-to-end hand-rail elements, each nipple having a flange, and each pliable covering having one end recessed to receive said flange.
Claim 2
Dependent Claim
109 words
A hand-rail assembly for a staircase comprising a plurality of hand-rail elements, each element having a soft metal core of tubular shape with a thin side wall thickness such that the metal core is easily bent by hand, each element having a pliable foamed polyurethane covering surrounding said tubular core and having a thickness at least approximately equal to the diameter of said core, a plurality of nipples connecting said hand-rail elements end-to-end, each nipple having opposed male threaded portions threadably received in the adjacent end portions of two end-to-end hand-rail elements, each nipple having a flange, and each pliable covering having one end recessed to receive said flange.
Claim 3
Dependent Claim
70 words
The hand-rail assembly of claim 1 further characterized by support means for said connected elements, said support means including support brackets each of which brackets has an upstanding post portion defining a saddle at its upper end for receiving said hand-rail elements, and an elongated screw extending lengthwise through said post portion and through a radial opening in one of said elements to be threadably received in said metal core.
Claim 4
Dependent Claim
21 words
The hand-rail assembly of claim 2 wherein the outer surface of said polyurethane covering is provided with a grained leather-like exterior.
References Cited (Backward Citations)
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US95614A
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US337100A
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US2869829A
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |