Unhingeable and concealed hinge for switching boxes
Patent 4873745 Issued on October 17, 1989. Estimated Expiration Date: 
January 11, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 11, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 437492 2131802 2778053 2913200 3021555 3406995 Tapered screw fastening means for bushings, sleeves and bearings Patent #: 4372703 InventorApplicationNo. 142376 filed on 01/11/1988US Classes:16/258, Having discrete latch and spring to slide or pivot latch16/259, Discrete retaining means for pivotal contacting surfaces16/261, Having movable or removable connector16/264, Screw-threaded connector16/379, Pintle or pivot concealed in hinged member403/362, Including set screw403/378Transverse pinExaminersPrimary: Godici, Nicholas P.Assistant: Andes, William Scott Attorney, Agent or FirmForeign Patent References
International ClassE05D 007/10Foreign Application Priority Data1987-01-09 DEAbstractA concealed hinge for switching boxes which is unhingeable, the hinge having a first and second hinge part. The first hinge part having a bearing eye attached to an inside of a door leaf. The second hinge part surrounds the first hinge part in the shape of a U and is connectable to a vertical frame member of the box. The second hinge part has two bearing eyes on ends of a U-shaped member. The hinge parts are connected by a bearing bolt arrangement.Other References
Field of SearchResiliently biased retaining meansHaving discrete latch and spring to slide or pivot latch Discrete retaining means for pivotal contacting surfaces Separation of pivotal contacting surfaces Having movable or removable connector Screw-threaded connector Pintle or pivot concealed in hinged member Including means to retain pintle in hinge (e.g., tamper proof, nonrising pintle, etc,) Threaded or slotted pintle or knuckle Transversely sliding pin Including set screw Transverse pin | |
