Joints and connections – Miter joint – Connector bridges inner or outer periphery
Reexamination Certificate
1998-06-10
2001-07-10
Kim, Harry C. (Department: 3629)
Joints and connections
Miter joint
Connector bridges inner or outer periphery
C403S087000, C256S065080
Reexamination Certificate
active
06257799
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The invention relates to a joining device for a handrail comprising at least two connectors, each one insertable onto the end of a segment of the handrail. These connectors cooperate with each other through contact surfaces and are made integral through connecting means capable of authorizing their rotation at the level of these contact surfaces.
This invention relates to the field of manufacturing of handrails for stairs or for any other kind of parapets.
(2) Description of the Prior Art
Stairs are in the form of one or several flights along which runs a handrail. By grasping this handrail, the person who uses stairs is assisted while going upstairs. The handrail provides a surface on which one can lean while going downstairs.
Such a handrail is generally subdivided into as many segments as there are flights. These segments are usually in the shape of tubular elements that are united to each other so as to bring about the continuity of handrail.
From EP-0,688,920 there is already known a joining device for creating the continuity between two tubular segments of a handrail. This joining device includes two connectors in the shape of two half spheres made integral with each other through connecting means allowing them to pivot with respect to each other. This creates a certain angle between the two segments of the handrail.
These two half spheres are kept into contact through their flat contact surface and are provided with integrated or inserted fitting means which allow them to be inserted onto or into the ends of tubular segments forming handrail. After adjusting the angular position of these fitting means, they are fixed to the ends of tubular segments of the handrail by means of a screw passing through the wall of bushing such a joining device interposed between two handrail segments has certain drawbacks.
Thus, this device adopts the shape of sphere the diameter of which is substantially large: than that of tubular segments of the handrail. This results into this handrail having a protrusion which not only hinders the advancing of the user's hand on this handrail, but is of aesthetically unpleasing appearance.
It should also be observed that the connecting means between the two half spheres allow a free rotation of these half spheres with respect to each other. Though such a rotation facilitates the mounting and positioning of the handrail, it also results in a certain lack of rigidity and stability.
In addition, the connection between the joining device and the handrail segments occurs through fitting means which can have protruding parts that are likely to cause injuries. This is also the case when this connection has to be fixed at an angle by using parts which are likely to protrude out of their receiving holes and which may have sharp angles and/or sharp segments.
There is also known a joining device for a handrail that is in the shape of two substantially cylindrical connectors connected each to a handrail segment. Each connector has a longitudinal axis and includes a contact surface oriented at 45°. This surface is provided with a perpendicular bore receiving a stud capable of ensuring the connection between both connectors of the joining device.
Each connector is provided along the longitudinal axis with a through bore into which a fixing organ of a handrail segment is screwed. This hole is also receives a tightening screw capable of co-operating with stud to immobilize this the stud with respect to its connector.
This tightening screw is located at the rear of fixing organ and is accessible only prior to the positioning or upon the withdrawal of this fixing organ. This results in the positioning or angular adjustment of a connector with respect to the other one being possible only prior to the mounting of the handrail segment or by proceeding to the withdrawal of same.
It should also be observed that the contact surface of each connector is bordered, over half its periphery, by a rim that substantially limits the rotation and the angular positioning of a connector. Therefore, when an angle has to be defined between two handrail segments, there should either be used an intermediate part interposed between the two connectors of the connecting rod.
SUMMARY OF THE INVENTION
This invention solves the above-mentioned drawbacks through a joining device of a particularly simple design and an easy implementation.
For this purpose, the invention relates to a joining device for a handrail comprising at least two connectors, each one being aimed at being insertable onto the end of a segment of the handrail. These connectors are cylindrically shaped and cooperate with each other through contact surfaces extending in a plane oriented at 45° with respect to the longitudinal axis of these connectors. These connectors are made integral through connecting means capable of authorizing their rotation at the level of these contact surfaces, these contact surfaces being defined so as to have a substantially circular shape the center of which is located on the axis of the rotation of the connecting means. The connecting means are defined by a screw substantially forming the axis of rotation of the two connectors. This connecting means in addition forms means for immobilizing these connectors in rotation and are capable of being accessible through an opening ending at the outer periphery of one of these connectors.
The advantages resulting from this invention allows the joining between two handrail segments of stairs through cylindrical connectors capable of adopting a rotary notion with respect to each other. The cross-section of these connectors can be chosen so that it is substantially identical to that of the generally tubular segments of the handrail.
Thus, this invention will be particularly applicable to a handrail comprised of tubular profiles with a substantially cylindrical cross-section. This handrail can then have an invariable cross-section over its entire length allowing the user to advance along same without being hindered by any protrusion it should in addition be observed that the absence of this protrusion confers to the handrail a continuity that advantageously contributes to its aesthetically pleasing appearance.
The particularly artful design of these connectors eliminates any sharp angle, on the one hand, between connectors and, on the other hand, between these connectors and the segments of the handrail.
In addition, the connecting means between two connectors also form means for immobilizing the connectors in rotation with respect to each other. Because of such connecting means, it is then possible to confer a determined angle to two successive handrail segments and to angularly fix the handrail segments in this position by immobilizing the connectors in rotation with respect to each other. This results in a substantial increase in rigidity and stability of the handrail.
The invention will be better understood when reading the following description with reference to the attached drawing.
REFERENCES:
patent: 307627 (1884-11-01), Brightman
patent: 695022 (1902-03-01), Albertson
patent: 1123839 (1915-01-01), Bridges
patent: 2255262 (1941-09-01), MacFadden
patent: 2630114 (1953-03-01), Hart
patent: 2630342 (1953-03-01), Gilmont
patent: 2816769 (1957-12-01), Noble
patent: 2854261 (1958-09-01), Spaide
patent: 2999671 (1961-09-01), Blayden
patent: 3233871 (1966-02-01), Schroer
patent: 3767236 (1973-10-01), Horgan, Jr.
patent: 4332499 (1982-06-01), Stucheli
patent: 4603526 (1986-08-01), Bollman
patent: 4662139 (1987-05-01), Bollman
patent: 4737047 (1988-04-01), Oshita
patent: 4767232 (1988-08-01), Francis
patent: 4854549 (1989-08-01), Roberts et al.
patent: 5071281 (1991-12-01), Murphy et al.
patent: 5275444 (1994-01-01), Wythoff
patent: 5437433 (1995-08-01), Rezek
patent: 5577714 (1996-11-01), Venegas, Jr.
patent: 5584469 (1996-12-01), Goodwin
patent: 5641236 (1997-06-01), Hornung et al.
patent: 5647681 (1997-07-01), Chen
patent: 429642 (1926-06-01), None
patent: 2345764 (1974-06-01), None
patent: 3123550 (1
Au Creuset de la Thierache, Societe Anonyme
Harrison & Egbert
Kim Harry C.
LandOfFree
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