US4373310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Staircase handrail construction
Assignee: Individual
•
Filing: 1980-04-14
•
Granted: 1983-02-15
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Expires: 2000-04-14
Abstract
Abstract A handrail support assembly has a tee member fitting into a support baluster above each tread of a spiral staircase. The upper cross member of the tee member fits into channels formed under the handrail. The channels are formed by return bending the sides of the rail. The tee member will support and position a spiral rail while being rotatable somewhat in the channels of the rail so that a predrilled nonprecision hole in the lower portion of the tee member may be aligned with a hole in the baluster for attachment with a screw. Precision components are avoided.
Inventors
- 👤 Robert Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
179 words
A handrail assembly for use with a staircase having treads, said assembly comprising: a continuous rail having a top and a pair of return bent and downwardly depending flanges, said flanges forming a pair of facing channels between the side walls along the length of said rail, each flange having a free edge positioned underneath the top, said free edges being spaced apart from each other and forming a slot therebetween; a tee member having a lower portion and an upper pin secured transversely across the upper end of the lower portion, said pin insertable into said pair of channels through said slot, said pin having a length substantially the same as the spacing between the side walls so that, with said pin positioned transversely across said rail and within said channels, the ends of the pin frictionally engage said side walls, an elongated post having one end secured to and extending upwardly from at least one of said treads; and means for fixedly securing the lower portion of said tee member to the other end of said post.
Claim 2
Dependent Claim
179 words
A handrail assembly for use with a staircase having treads, said assembly comprising: a continuous rail having a top and a pair of return bent and downwardly depending flanges, said flanges forming a pair of facing channels between the side walls along the length of said rail, each flange having a free edge positioned underneath the top, said free edges being spaced apart from each other and forming a slot therebetween; a tee member having a lower portion and an upper pin secured transversely across the upper end of the lower portion, said pin insertable into said pair of channels through said slot, said pin having a length substantially the same as the spacing between the side walls so that, with said pin positioned transversely across said rail and within said channels, the ends of the pin frictionally engage said side walls, an elongated post having one end secured to and extending upwardly from at least one of said treads; and means for fixedly securing the lower portion of said tee member to the other end of said post.
Claim 3
Dependent Claim
26 words
The invention as defined in claim 1 wherein the lower portion of said tee member and said other end of said post are telescopically secured together.
Claim 4
Dependent Claim
29 words
The invention as defined in claim 1 wherein said other end of said post is tubular and slidably receives the lower portion of said tee member within its interior.
Claim 5
Dependent Claim
19 words
The invention as defined in claim 3 wherein said post and said lower portion are cylindrical in cross section.
Claim 6
Dependent Claim
26 words
The invention as defined in claim 1 wherein said securing means comprises a screw threadably secured through registering holes in said lower portion and said post.
Claim 7
Dependent Claim
15 words
The invention as defined in claim 1 wherein said rail is of a single-piece construction.
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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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |