Patent Application
20100146734
This invention relates to a unique hinge structure, wherein certain components are subject to frictional engagement that provides for stabilization of the door at the position it is moved to, between either an opened condition, or a closed condition, or partially thereby, so as to hold the door at a stationary position once fully or partially opened.
As has long been known in the art, doors or other hinged structures, or swinging objects, that are required or desired to remain in a fully or partially opened position, often tend to swing to either a fully opened position, or fully closed position, or at an undesirable intermediate position, either because of the gravitationally induced movement caused by the out-of-plumb alignment, vibration, or atmospheric pressure, or even temperature differentials. Or, anything as simple as a stiff breeze can push a door from its opened condition, into either closure or impact against another object, when blown open under such conditions. In the prior art, various types of external wedges or braces have been utilized to hold the swinging object, or door, in a desired position. Such wedges or braces are just inconvenient to use and are potentially dangerous as a tripping hazard, particularly for the elderly homeowner. Other devices usually attached to the door or other swinging object, and which incorporate means to lock the swinging object into position, have been applied. These types of devices require attachment to both the swinging object and to the fixed frame of some type, as well as a locking or fixing means that must be engaged to restrain the object and release it to free or reposition the swinging object, or the door. Examples of such applications include, but are not limited to, a hinged door or other swinging object such as residential or commercial wall doors, cabinet doors, doors or other swinging means as on vehicles such as trucks, aircraft, watercraft, and the like.
This invention provides a simple, new, useful and unique solution to the problems that are described above.
Other prior art patents that have shown structures having some relationship to the subject matter of this invention can be seen in the following patents.
The patent to Nunes, U.S. Pat. No. 4,078,276, is upon a Hinged Pin, wherein its cylindrical sleeve is formed of two sections that mate in a taper so that the sleeve can be disassembled and removed as required.
The patent to Steuer, U.S. Pat. No. 4,179,844, shows another form of hinge that is made up of various extruded components. It does incorporate the use of a wire-form spring.
The patent to Maggart, U.S. Pat. No. 4,438,597, shows an Adjustable Hinge Mount. This is simply a mount for supporting a door frame hinge.
The patent to Shank, U.S. Pat. No. 4,738,002, shows another Hinge Mounted Doorcheck. The purpose of this door check is to limit the amount of the door opening past a predetermined arcuate amount.
The patent to Hoffman, U.S. Pat. No. 4,761,853, shows a Self-Closing Hinge Structure. The purpose of this geared hinge, which includes resilient material within its structure, is to compress that material when the hinge members are moved, and to urge the door into a self-closing action through the hinge.
The patent to Keller, U.S. Pat. No. 4,949,427, shows a Hinge With Integral Detent And Stop. The hinge includes a spring, which acts in conjunction with an arcuate portion of the spring, to function as a stop which prevents further opening rotation of the hinge, during movement of the door.
The patent to Chavez, U.S. Pat. No. 5,033,161, discloses a Door Hinge with Knuckle Cylinder Having a Major Beveled Portion. The purpose of this beveling, upon the upper hinged cylinder, is to provide clearance for access of a tool when the hinge pin is to be removed.
The patent to Doring, U.S. Pat. No. 5,419,640, shows an Adjustable Support for Journals and Hinge Pins, Especially for Use with Doors and Gates. Its structure includes an eccentrically positioned receiving bore, for the hinge pin, and a cooperating set screw, which is used for adjustment in the hinge pins location within the hinge journals.
U.S. Pat. No. 5,642,910, to Betherum, is upon a Multi-Position Door Hinge Lock. The purpose of this hinge lock is to be used for holding the door either in an opened or closed position, relative to its doorway. Apparently, it includes a sleeve-like lock, with slots, that fit over the hinge, to hold the hinge parts together, or separated.
The patent to Green et al, U.S. Pat. No. 5,755,011, shows another Adjustable Hinge. This adjustable hinge features a vertical adjustment mechanism for selective movement of the first hinge member relative to the second hinge member.
Finally, the patent to Baer, U.S. Pat. No. 6,073,310, shows a Torque Resistant Hinge Bearing. This mechanism shows what appears to be an interengaged gear component associated with each hinge part that apparently resists rotation, when the hinge part is arranged in a particular location.
The current invention, to the contrary, for what is shown in the prior art, provides means for using frictional engagement, whether it be by surface friction, or spring pressure, to function as a door stop, at any particular location upon its opening, to hold the door at a fixed position, and resist further opening or closing, once adjusted.
The purpose of this invention is to hold a hinged door in any desired position between fully open and fully closed in resistance to unwanted forces. This invention accomplishes this by creating bi-directional swing-resistant friction between the opposing knuckles of both section of a door or hinge. The bi-directional swing-resistant friction is created by applying and maintaining a tensile force in a specially designed hinged pin such as to squeeze the knuckles of opposing halves tightly together thus creating a bi-directional swing-resistant frictional torque. The pin tension is adjusted such that the magnitude of the swing resistant frictional torque will allow the door to be intentionally and easily moved to any position between fully open and fully closed, but will not allow the door to be moved by unwanted forces, such as wind or weight unbalance caused by out-out-plumb installation or building settling. Thus, the invention compensates automatically for knuckle-face wear that would relieve the interknuckular forces (and swing-resistant friction) and allow the door to swing more freely than desired.
Thus, the concept of this invention is to provide sufficient frictional force between select knuckles of the hinge plates, that holds the door into a set position, and fixes it at that location, but yet can be moved through manual force to other settings, as desired.
This invention relates to multiple configurations of hinge components and devices that restrain a door or similar hinged swinging appliance from an autonomously swinging away from an initially set fully or partially open position, in which it has been placed. The desired result is to accomplish that objective by means of easily installed and unique, adjunct hinge components. No modification is required to the door, the jams or the door frame, for installation of this operative hinge.
This is related primarily to various means for causing the door or other hinge, or swinging object to remain in the last partially open position to which it was placed. In its primary implementation, the invention consists of multiple ways of applying friction to the hinge or hinges of a swinging object, such as a door, in such a manner as to inhibit or prevent undesired swinging, but simultaneously to allow the object door to be positioned infinitely and easily to any desired point between fully opened and fully closed by application of a small, easily applied rotational force.
There are two fundamental means, linear friction and radial friction, by which this invention creates the optimal amount of hinge friction and resistance to swinging. A third method consists of a combination of the two fundamental methods and may be employed if a greater amount of stabilizing friction is required, as with heavier swinging objects, or if other destabilizing actions are present.
In one embodiment, spring pressure is applied to the pin of the hinge, thereby forcing the knuckles of the hinge into closer contact, for generation of friction, to thereby hold the door in position, once it is fully or partially opened.
A second structure, and method for achieving the results of this invention, includes the use of a frictional pin, which is spring bias of integral structure, which when slid through the hinge knuckles, will hold the hinge components at their adjusted position, and the door or other closure object to which the hinge is attached, so as to prevent further opening, or closing, of the structure once it has been adjusted.
Other variations upon these types of frictional generating pressures for holding the hinge components at select positions are considered within the linear friction and radial friction concepts that compose the subject matter of this invention.
It is, therefore, the principal object of this invention to provide a hinge structure that can maintain a door at a partially or fully opened condition, at the desire of the occupant.
Another object of this invention is to utilize linear generated friction upon the hinge components to adjust and hold a door at a select opened position.
Another object of this invention is to utilize radial friction, through the structure of the hinge pin, to hold a door or other structure at an adjusted position.
A further object of this invention is to provide a modified pin assembly for a door hinge that holds the door in a desired position, from fully closed to fully open, and anywhere in between, and thus dampens the swing of the door in either direction, and controls the door swing inertia.
A further object of this invention is to replace the standard pin of one hinge of a hinged swinging object with a uniquely designed pin assembly.
Yet another object of this invention is to provide a unique pin assembly for controlling autonomous door movement, whereby it may be set at installation, and require no further adjustment.
Still another object of this invention is to provide a custom pin for a standard hinge, and which functions to control movement of the door away from any position to which it has been placed.
Still another object of this invention is to provide a replacement pin for a hinge that is virtually unnoticeable.
Another object of this invention is to provide a unique pin assembly for a standard hinged door that eliminates the need for unsightly wall and door mounted stops.
Yet another object of this invention is to provide a unique pin assembly for a standard hinged door that avoids excessive swings, as from the force of wind, children hitting against the door, and therefore allows the door to be selected for a particular position, and to remain in that set location.
Still another object of this invention is to prevent a door from undertaking unwanted swings due to imbalance or other effects.
These and other objects may become more apparent to those skilled in the art upon review of this summary of the invention as provided herein, and upon undertaking a study of the description of its preferred embodiments, in view of the drawings.
In referring to the drawings,
As can be seen from the figures previously described, there are various modifications to a hinge structure that can generate either linear friction or radial friction for holding the hinge components at an adjusted position, as when a door is partially opened, fully opened, or even to be held in closure.
The first method, referred to as the linear compression method, is implemented by applying a linear force by means of compression on a unique pin assembly, to cause an opposing force that will squeeze the hinge knuckles together, thus creating a rotation-resisting frictional force between the adjacent knuckle faces that is directly proportional to the applied compressive force and the coefficients of friction of the opposing knuckle material surfaces. A smaller component of motion-resisting force is also created by friction between the pin head and opposing knuckle surface at one end of the tensioned pin and a similar motion-resisting force at the opposite end of the pin.
The modified embodiment of the linear compression method is illustrated by
Another method is the same as the first method, except with a spring or springs 12 clamped between the end hinge knuckle face and the tension-producing nut 13 such that the spring, or springs, is compressed to maintain an essentially constant interknuckular force, and therefore, achieves essentially constant swing-resistant friction in the event of wear of the adjacent knuckle faces. This embodiment is shown by
Another method, referred to as the radial compression method, is implemented by replacing a standard hinge pin with a hollow cylindrical spring pin 14 having a longitudinal slot 15 that extends the full length of the pin such that the circumference of the pin forms somewhat less than a full cylinder. The outside diameter of said hollow, slotted cylindrical spring pin is, in its free state, somewhat larger than the outside diameter of the hinge pin that is replaced by the slotted pin and is also an appropriate amount larger than the inside diameter of the hinge knuckles.
The hollow, cylindrical, longitudinally-slotted spring pin, when inserted into the inside diameters of the hinge knuckles, tends to expand outwardly, thus creating a radially outward compressive force that is counteracted by an equal and opposite radially inward force from the inside diameter of the hinge knuckles. The two opposing radial forces cooperate to create a motion-resistant frictional force that is directly proportional to the product of the radial force and the coefficients of friction of the pin and knuckle materials and the effective radius at which the friction force acts. The radial forces create sufficient friction to restrain and prevent unwanted swinging of the hinged object, but at the same time, allow the hinged object to be readily positioned at any point between fully open and fully closed. The embodiment of this concept is illustrated by
Another embodiment, referred to as tensioned force, the hollow-slotted spring pin employs a hollow, slotted cylindrical pin 16 as used in the second embodiment except the pin is somewhat longer than the combined length of the hinge knuckles and each end of the pin is threaded as at 17 and 18, for a length sufficient to accommodate a matching threaded member of the threaded nuts 19 and 20. After the hollow, slotted cylindrical spring pin has been inserted into the hinge knuckles the proper distance, a standard threaded nut or similar fastener is threaded onto each extended end of the slotted spring pin and tightened to exert an adjustable friction force between the nut and opposing knuckle faces. Further tightening of the end nut will cause a modification of the outwardly radial force exerted by the hollow, slotted pin in accordance with Hook's Law that recognizes the linear relationship between stress and strain in the elastic regime. With this method, the radial contact force between the slotted pin and the inside surfaces of the hinge knuckles is initially greater than the optimum amount, thus creating swing-resistant friction somewhat greater than might be desired. This condition is compensated by progressive tightening of either of the two threaded fasteners at the ends of the slotted pin by causing the pin length to increase according to Hook's Law and the diameter to decrease according to Poisson's ratio. Tightening one or the other of one of the end nuts allows creation of an optimum ratio of radial-to-linear friction forces within and between the hinge knuckle which produces an optimum resistance to swinging of the hinged object.
This invention recognizes that, as the radial friction is decreased, the inter-knuckle force and friction is simultaneously increased. The net affect is to modulate the sensitivity of adjustment and compensate for inter-knuckle wear, thus maintaining a nearly-constant frictional resistance to unwanted swinging of a door or other hinged object.
This embodiment allows optimum adjustment of the motion-resistant force while allowing easy positioning anywhere within the normal arc of the swinging object. This embodiment is shown by
The further embodiment is created by any outwardly-expanding spiral spring 21 in cooperation with an optional pin positioned linearly thru the center of the spiral spring. The pin may have a head or nut on one end and a thread with nut and optional springs as previously described on the opposite end. The expanding spiral spring creates a constant outward force against the inside of the hinge knuckle thus creating a fixed spring-knuckle, with swing-resistant friction. Such friction, combined with the adjustable inter-knuckle friction created by pin tension, by the means previously described, is able to create sufficient swing-resistance to be especially applicable to heavier doors and other swinging objects. This embodiment is shown by
Another embodiment consists of a pin 22 of somewhat smaller diameter than the hinge knuckle bores. Said pin to have a head 23 or nut on one end and the opposite end threaded with a nut 24 and optional springs 25 as previously described. A series of rings 26 with inside diameter to slip easily over the pin and with an outside diameter to slip easily into the hinge knuckle bore. Such rings, of which there may be any number, may be of any effective cross-sectional shape and are stacked around the hinge pin such that the length of the stack is slightly greater than the length of the hinge. Alternatively, the ring stack may be shorter than the length of the hinge, as shown in
The hinge assembly as previously described in
The constant-force springs are designed to have a force versus compression characteristic similar to that shown in
As described earlier, the bi-directional door-swing resistance depends upon the interknuckular friction that is created between the knuckle faces of the opposing hinge halves. The interknuckular friction versus torque relationship can be expressed as:
T=μ×r×Fs
The coefficient of friction, μ, is a function of the knuckle material and surface finish, and independent of direction of rotation. The effective radius, r, depends on knuckle size and both r and μ are essentially constant for any hinge. Therefore, if the spring force remains constant, pin tension and interknuckular friction must remain constant resulting in constant bi-directional door-swing resistance.
The relationship among the factors that effect the swing-resistant torque are shown, schematically, in
Individual springs are designed to have force versus compression as shown by
When the calibration nut 3 is tightened, there may be a tendency for the pin to rotate and inhibit tightening of the nut. That tendency may be offset by applying an offsetting torque to the head of the pin by a wrench or other means. More convenient methods of offsetting the calibration torques are included in the shape of the pin. The first method is to provide a low-angle taper or radius just under the pin head such that, as the calibration nut is tightened, the taper or radius is wedged into the inside diameter of the adjacent hinge knuckle resulting in a frictional torque to offset the torque applied by the calibration nut. See
Variations or modifications to the subject matter of this invention may occur to those skilled in the art upon review of the development as disclosed herein. Such variations, if within the spirit of this development, are intended to be encompassed within the scope of the claims to this invention.
This non provisional patent application claims priority to the provisional patent application having Ser. No. 61/201,924, which was filed Dec. 16, 2008.
| Number | Date | Country | |
|---|---|---|---|
| 61201924 | Dec 2008 | US |
