Closure fasteners – Ball
Reexamination Certificate
1999-09-02
2001-05-22
Luu, Teri Pham (Department: 3627)
Closure fasteners
Ball
C292S336300
Reexamination Certificate
active
06234547
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to door latches and more particularly pertains to a new multifunction door knob assembly for allowing for a door to be opened easily without being forced to turn a door knob.
2. Description of the Prior Art
The use of door latches is known in the prior art. More specifically, door latches heretofore devised and utilized are known to consist basically of familiar, expected and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which have been developed for the fulfillment of countless objectives and requirements.
Known prior art door latches include U.S. Pat. No. 4,629,228 to Marko et al.; U.S. Pat. No. 4,986,583 to Campbell et al.; U.S. Pat. No. Des. 249,120 to Jerila; U.S. Pat. No. 4,007,954 to Erickson; U.S. Pat. No. 3,975,933 to Bako; and U.S. Pat. No. 4,003,593 to Wilzig et al.
While these devices fulfill their respective, particular objectives and requirements, the aforementioned patents do not disclose a new multifunction door knob assembly. The inventive device includes an engagement mechanism is disposed within the side opening of the door. The engagement mechanism includes a cylindrical casing having open opposed ends. One of the opposed ends has a ball bearing slidably disposed therein. The ball bearing engages a door casing in a closed orientation. Opposed from the ball bearing in the opposed open end of the casing is a pressure block. The pressure block is slidably disposed within the casing. The pressure block has a pair of tabs disposed thereon to preclude disengagement from the casing. A spring is disposed between interior ends of the ball bearing and the pressure block. A swing arm is disposed within the side opening of the door inwardly of the engagement mechanism. The swing arm has an outer portion and an inner portion. An inner end of the inner portion is pivotally coupled within the side opening of the door. An outer end of the outer portion has a roller ball disposed therein within a U-shaped housing. The roller ball selectively engages an inner end of the pressure block. The inner portion is freely rotatable with respect to the outer portion. The inner portion has a coil spring coupled thereto to facilitate retractable rotation of the inner portion. The inner portion has a cord wrappedly coupled thereto.
In these respects, the multifunction door knob assembly according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in so doing provides an apparatus primarily developed for the purpose of allowing for a door to be opened easily without being forced to turn a door knob.
SUMMARY OF THE INVENTION
In view of the foregoing disadvantages inherent in the known types of door latches now present in the prior art, the present invention provides a new multifunction door knob assembly construction wherein the same can be utilized for allowing for a door to be opened easily without being forced to turn a door knob.
The general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new multifunction door knob assembly apparatus and method which has many of the advantages of the door latches mentioned heretofore and many novel features that result in a new multifunction door knob assembly which is not anticipated, rendered obvious, suggested, or even implied by any of the prior art door latches, either alone or in any combination thereof.
To attain this, the present invention generally comprises a door having a side opening extending within a side edge thereof. The door has openings through front and rear surfaces thereof in communication with the side opening. An engagement mechanism is disposed within the side opening of the door. The engagement mechanism includes a cylindrical casing having open opposed ends. One of the opposed ends has a ball bearing slidably disposed therein. The ball bearing engages a door casing in a closed orientation. Opposed from the ball bearing in the opposed open end of the casing is a pressure block. The pressure block is slidably disposed within the casing. The pressure block has a pair of tabs disposed thereon to preclude disengagement from the casing. A spring is disposed between interior ends of the ball bearing and the pressure block. A swing arm is disposed within the side opening of the door inwardly of the engagement mechanism. The swing arm has an outer portion and an inner portion- An inner end of the inner portion is pivotally coupled within the side opening of the door. An outer end of the outer portion has a roller ball disposed therein within a U-shaped housing. The roller ball selectively engages an inner end of the pressure block. The inner portion is freely rotatable with respect to the outer portion. The inner portion has a coil spring coupled thereto to facilitate retractable rotation of the inner portion. The inner portion has a cord wrappedly coupled thereto. A first door knob is slidably received within the opening in the front surface of the door. The first door knob has an interior arm portion disposed within the side opening of the door. The interior arm portion is positioned for selectively moving the swing arm forwardly when the first door knob is pushed inwardly with respect to the opening in the front surface of the door. A second door knob is removably positioned within the opening in the rear surface of the door. The second door knob is secured to a free end of the cord whereby outward pulling of the second door knob will pull the swing arm towards the opening in the rear surface of the door whereby releasing the second door knob will cause the coil spring to wind the cord around the spring arm and return the second door knob within the opening in the rear surface of the door. The second door knob has a stop block extending inwardly therefrom to limit movement of the swing arm.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
Further, the purpose of the foregoing abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientists, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application. The abstract is neither intended to define the invention of the application, which is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
It is therefore an object of the present invention to provide a new multifunction door knob assembly apparatus and method which has
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