US3608938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking railing construction
Assignee: CRANEVEYOR CORP A CA CORP
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Filing: 1969-09-18
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Granted: 1971-09-28
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Expires: 1989-09-18
Abstract
Abstract An interlocking construction for metal railings is described which provides a rigid and tamperproof railing construction and yet which is quickly assemblable. The interlocking construction includes a wedge-and-hanger assembly for rigidly securing locking bars for an upper rail to railing posts. A connector is also provided for securing a bottom rail to the posts by a wedge arrangement which assures tight securance of the bottom rail to the posts. Bars are arranged vertically between the upper and lower rails and are secured thereto by locking studs which rely upon a friction fit to assure tight securance of the bars.
Inventors
- 👤 Robert H Murdock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:14
CPC Classifications
F; F16; F16B; F16B3/00; F16B7/00; F16B7/04; F16B7/044; F16B7/0446; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876; Y10T29/49945; Y10T403/00; Y10T403/49; Y10T403/4958; Y10T403/4966
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
258 words
An interlocking construction for connecting a first member having a preferred hollow open end to a second member having an aperture adapted to register with said hollow open end, comprising a pair of locking studs each of which includes a head portion and a pin portion, a first exterior surface portion of each of said pins having a configuration mating with a corresponding portion of the interior surface of the hollow end portion of said first member, each of said surface portions of each of said pins being complementary to a different portion of the interior surface of said hollow end portion than the other, each of said pins having a face adapted to be opposed to a like face of the other pin when said pins are inserted through the aperture in said second member and said exterior surface portions of the pins are in mating relation to said interior surface of said hollow end portions, said face of each of said pins having projections which in a first axial positioning of said studs with said pin faces in opposed substantially contacting relationship interfit with one another to permit said studs to be inserted through said second member aperture and into said first member hollow end portion, and which in a second axial positioning of said studs abut one another forcing said studs apart and said exterior surface portions of said pins into tight frictional engagement with the complementary interior surface of said hollow end and with the portions of said second member defining the aperture therein.
Claim 2
Dependent Claim
258 words
An interlocking construction for connecting a first member having a preferred hollow open end to a second member having an aperture adapted to register with said hollow open end, comprising a pair of locking studs each of which includes a head portion and a pin portion, a first exterior surface portion of each of said pins having a configuration mating with a corresponding portion of the interior surface of the hollow end portion of said first member, each of said surface portions of each of said pins being complementary to a different portion of the interior surface of said hollow end portion than the other, each of said pins having a face adapted to be opposed to a like face of the other pin when said pins are inserted through the aperture in said second member and said exterior surface portions of the pins are in mating relation to said interior surface of said hollow end portions, said face of each of said pins having projections which in a first axial positioning of said studs with said pin faces in opposed substantially contacting relationship interfit with one another to permit said studs to be inserted through said second member aperture and into said first member hollow end portion, and which in a second axial positioning of said studs abut one another forcing said studs apart and said exterior surface portions of said pins into tight frictional engagement with the complementary interior surface of said hollow end and with the portions of said second member defining the aperture therein.
Claim 3
Dependent Claim
29 words
A construction as defined in claim 1, in which said aperture has a configuration mating with and complementary to said first exterior surface portions of said pair of pins.
Claim 4
Dependent Claim
54 words
A construction as defined in claim 1, in which a first projection on each face is positioned adjacent said second member aperture and another projection on each stud is positioned in spaced relationship to said first projection and within said first member hollow end portion when said studs are in said second axial positioning.
Claim 5
Dependent Claim
23 words
A construction as set fOrth in claim 1, in which said first member is of hollow tubular configuration defining said hollow open end.
Claim 6
Dependent Claim
20 words
A construction as set forth in claim 1, in which said hollow open end has an internal polygonal cross section.
Claim 7
Dependent Claim
18 words
A construction as set forth in claim 5, in which said polygonal cross section constitutes a substantial square.
Claim 8
Dependent Claim
29 words
A construction as set forth in claim 5, in which said faces form an acute angle with at least some of the interior surface of said hollow end portions.
Claim 9
Dependent Claim
34 words
A construction as set forth in claim 1, in which said hollow end portion is of generally square cross-sectional configuration and each of said pin portions has a cross-sectional form of a right triangle.
Claim 10
Dependent Claim
37 words
A construction as set forth in claim 1, in which the width of said pin measured from the face thereof to the outermost surface thereof has a lesser dimension at a medial portion than at the ends.
References Cited (Backward Citations)
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |