公开(公告)号：US4089084A

公开(公告)日：1978-05-16

申请号：US806518

申请日：1977-06-14

Applicant: Daniel M. Droz

Inventor： Daniel M. Droz

IPC: A47C4/32 ,  E05D11/06 ,  E06C1/18 ,  E06C7/50 ,  E05D9/00 ,  E05D11/10 ,  E05D15/00

CPC classification number: E06C1/39 ,  A47C4/32 ,  E05D11/06 ,  E06C1/18 ,  E06C7/50 ,  E05Y2900/60 ,  Y10T16/544 ,  Y10T403/32581

Abstract: An internal hinge for use with first and second members such as the front and back legs of ladders in which there is a generally tubular means having a first portion adapted to be inserted into an aperture in the first member and a second portion adapted to be inserted into a second aperture in the second member. The apertures are aligned and adjacent one another and in the first portion there are two peripheral slots opposite one another through which a rigid pin passes, the ends of the pin being fastened to the first member. The second portion has two aligned transverse apertures through which a second pin is passed from outside the second member. Other embodiments include detented slot means for allowing selected angular positions of the legs, non-round tubular means, three-pin versions allowing two members to pivot with respect to a third, etc. Other embodiments include plant stands, easels, saw-horses, collapsible tables and collapsible seats.

Abstract translation: 用于与第一和第二构件（例如梯子的前腿和后腿）一起使用的内部铰链，其中具有大致管状装置，其具有适于插入第一构件中的孔中的第一部分和适于插入的第二部分 进入第二构件中的第二孔。 孔彼此对准并相邻，并且在第一部分中存在两个彼此相对的周向槽，刚性销通过该两个周向槽，销的端部紧固到第一构件。 第二部分具有两个对准的横向孔，第二销从第二构件的外部通过。 其他实施例包括用于允许腿的选定角位置，非圆形管状装置，允许两个构件相对于第三个构件枢转的三销形式的限位槽装置。其他实施例包括植物架，画架，锯马， 可折叠桌子和可折叠座椅。