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Publication numberUS3703742 A
Publication typeGrant
Publication dateNov 28, 1972
Filing dateOct 5, 1970
Priority dateApr 13, 1970
Publication numberUS 3703742 A, US 3703742A, US-A-3703742, US3703742 A, US3703742A
InventorsMikio Konishi
Original AssigneeNew Lite Ind Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plastic hinge
US 3703742 A
Abstract
This invention relates to a plastic hinge provided with the holes for fixing on the right and left fixed plates at the places asymmetrical to each other respectively, whereby making it possible to firmly fix the hinge again by means of using the right and left fixed plates conversely to each other in case of strain being caused.
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Description  (OCR text may contain errors)

United States Patent Konishi PLASTIC HINGE [72] Inventor: Mikio Konishi, l-ligashiyamaku,

Japan [73] Assignee: New Lite Industry Company Limited, Higashiyama, Ku, Kyoto, Japan [22] Filed: Oct. 5, 1970 [21] Appl. No.: 78,063

[30] Foreign Application Priority Data Apr. 13, 1970 Japan ..45/35656 [52] US. Cl....(. 145/128, l6/l37 51 Int. Cl. ..E05d 9/00 [58] FieldofSearch ..l6/l28,l37,135

[56] References Cited UNITED STATES PATENTS 2.571 533 10 1951 v u, ..l6/l37 51 Nov. 28, 1972 2,790,198 4/1957 Schoen et al. 16/169 1,097,458 5/1914 McKinney l6/ 1 28 3,526,922 9/ 1 970 Kellems 1 6/1 28 2,762,076 9/ 1956 Kiba 16/ l 28 Primary Examiner-Bobby R. Gay Assistant Examiner-Doris L. Troutman Attorney-lowly, Rinehart, Markva and Smith [57] ABSTRACT This invention relates to a plastic hinge provided with the holes for fixing on the right and left fixed plates at the places asymmetrical to each other respectively, whereby making it possible to firmly fix the hinge again by means of using the right and left fixed plates conversely to each other in case of strain being caused.

6 Claim, 3 Drawing Figures PATENTED 28 I973 V 3.703.742

FIG.1

INVENTOR MIKIO korvlsm ATTORNEY PLASTIC HINGE This invention relates to the construction of tough plastic hinge.

The object of this invention is to provide the hinge far excellent in strength, lower in price, light in weight and free in coloring as compared with metallic hing es by means of making use of plastics as the material.

Almost all of the conventional hinges are made of metal. All of these metallic hinges have such defects as being high in price, heavy in weight and less beauty in coloring, while steel hinges might gather rust in case of having been used for a long time. There are various kinds of plastic hinges, about which studies have recently. been made with a view to improving the unfavorable points referred to above. Almost all of these plastic hinges, however, are inferior in terms of strength to the conventional metallic hinges.

The present invention consists of a certain novel features making a plastic hinge superior to metallic hinges.

In the accompanying drawing;

FIG. 1 is a planview showingvthe state in which the hinge covered by the present invention is opened.

FIG. 2 is a perspect view of the hinge according to the present invention.

FIG. 3 is a sectional view on the line lII-lll of FIG.

For a better understanding of the present invention, reference is made to the accompanying drawing showing a plastic hinge provided with the thick'convex portions; for examples 9 and 10, at each center of which the holes for fixing l4 and are drilled, on one of the fixed plates corresponding to the knuckles 2 and 4 of the otherfixed plates; and with the concave portions 9 and 10', into which the convex portions 9, 10 are fitted at the places on the other of the fixed plates corresponding to the said convex portions. In the drawing, 6, 7, and 8 are the convex portions provided at the places opposing respectively to the knuckles l, 3 and 5; ll, 12 and 13 are the holes for fixing drilled at each center of convex portions 6, '7 and 8; and 6, 7 and 8' are the concave portions, into which the convex portions 6, 7 and 8 are fitted. The arrow marks A, B, C, D, E in FIG. 1 show the direction of each force applied on a plastic hinge when it is fixed to a door and a frame pole adjacent to the door. When a plastic hinge is fixed to a door and a frame pole, a resultant force of B, D and E is applied on the upper plate in FIG. 1, while a resultant force of A and C is applied on the lower plate as the force corresponding,in parallel, to the resultant force of B, D and E. These forces are all applied on the places opposite to the knuckles of one of the fixed plates. Consequently, the present invention has thick portions, i.e., convex portions, on which forces are applied most, with the holes for fixing being provided on each center. The places on the other of the fixed plates corresponding to the convex portions form the concave portions, into which the said convex portions are fitted.

As mentioned above, the present invention has the holes for fixing, which are drilled at the places most effective, and moreover being thick convex portions, on which the holes for fixing are drilled, are far thick in thickness as compared with the corresponding portions of metallic hinge, whereby making it possible to completely prevent the damage by the pressure of screws.

Conventionally, the hinge is fixed to a door and a frame pole with screws passing through the holes for fixing. With the lapse of long time after fixing the hinge to a door and a frame pole, the woodportion rotted or the screw holes came to too large resulting in giving rise to strain to the portions, where the hinge is fixed, in

many cases.

However, the hinge of the present invention is provided with the holes for fixing on the right and left fixed plates at the places asymmetrical each other respectively. In case of strain being caused, it is possible to fix again the hinge firmly by means of using the right and left fixed plates conversely each other.

Polycarbonate resin, ABS resin, Polyacetal resin, etc. are strong in strength and tenacity as they resins to be used for the manufacture of this hinge. These resins are most suitable as the raw materials for plastic hinges. It stands to reason that the special characteristics of risins, such as low-price, toughness and light weight, are made the best use of in such plastic hinges. And further, as a matter of course, such plastic hinges are superior in terms of color to the conventional metallic hinges. x

The result of pressure test on the hinge covered by the present invention shows the strength of 850 kgs about three times as strong as the brass hinge which is 300 kgs in pressure resisting strength, while the result of tension test shows the strength of 190 kgs about two times as strong as the brass hinge which is kgs in tensile strength.

What is claimed is:

l. A hinge composed of a rigidnon-metallic material comprising a. a pair of hinge plates, each plate including a generally fiat surface and a plurality of knuckles spaced along one edge thereof, said knuckles being spaced such that with said one edge of each of the pair of plates arranged adjacent each other the knuckles on one plate mesh with and alternate with the knuckles on the other plate, each knuckle including an opening therein positioned such that the openings are in alignment, and

. a pintle passing through said opening such that one plate may be pivoted with respect to the other,

c. the flat surface of each'of said plates including a plurality of embossments and a plurality of recesses, each embossment being located on a portion of said surface extending between the parts of said one edge not having said knuckles and the opposite edge thereof to strengthen said plate at the points of greatest strain during use, and each recess being located in a portion of said surface extending between the parts of said one edge having knuckles and the opposite edge thereof where said plate receives less strain during use, the size and arrangement of said recesses on each plate complementing the corresponding embossments on the other plate,

. whereby portions of each of said plates in alignment with each of said knuckles are thinner than corresponding portions of each of said plates in alignment with the edge between said knuckles, and when said plates are pivoted such that said surfaces of the plates are in contiguous relationship the embossments of each of said plates will be received in the recesses of the other plate and the overall thickness of said hinge will not be substantially greater than the combined thicknesses of the two plates.

2. A hinge as defined in claim 2 wherein the embossments of said plates include holes for receiving screws for mounting said hinge.

3. A hinge composed of a rigid, non-metallic material comprising a. a pair of hinge plates, each plate including a generally flat surface and a plurality of knuckles spaced along one edge thereof, said knuckles being spaced such that with said one edge of each of the pair of plates arranged adjacent each other arranged to complement the corresponding embossments on the other plate and when said plates are pivoted into surface-to-surface relationship, each embossment and recess combination having a thickness which is less than the thickness of the plate in which the recess is formed,

d. the embossments on each plate being positioned on that portion of the surface which extends away from and between the knuckles of the plate whereby the embossments on each plate provide reinforcement to the hinge plates at the points of greatest strain during use without increasing the combined thickness of the pair of hinge plates.

4. A hinge assembly as defined in claim 3 wherein all embossments have equal thickness and all recesses have equal depth.

5. A hinge assembly as defined in claim 3 wherein the thickness of the embossments in each plate is no greater than one-half of the thickness of the other plate.

6. A hinge as defined in claim 3 wherein the embossments of said plates include holes for receiving screws for mounting said hinge.

the knuckles on one plate mesh with and alternate with the knuckles on the other plate, each knuckle including an opening therein positioned such that the openings are in alignment,

b. a hinge pin, said pin passing through said openings such that one plate may be pivoted with respect to the other,

0. the flat surfaces of each of said plates including a plurality of embossments and a plurality of

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1097458 *Aug 26, 1911May 19, 1914James P MckinneyHinge.
US2571633 *Aug 30, 1946Oct 16, 1951Vogel EdwardDoor hinge
US2762076 *Apr 4, 1955Sep 11, 1956Continental Plastics CorpPlastic hinge construction for molded plastic receptacles
US2790198 *Mar 17, 1953Apr 30, 1957Schoen KurtDoor and window hinge
US3526922 *May 10, 1968Sep 8, 1970Acme General CorpEdge mounted nonmortised hinge
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4064595 *Sep 7, 1976Dec 27, 1977The Knapheide Manufacturing Co.Metal door and hinge construction
US4403357 *Nov 18, 1980Sep 13, 1983Inpaver AgReclining furniture
US4490884 *Jun 30, 1983Jan 1, 1985Southco, Inc.Adjustable friction hinge
US4545090 *Sep 24, 1984Oct 8, 1985Redmond Daniel RGlass filled plastic hinge
US4630333 *Dec 16, 1985Dec 23, 1986Southco, Inc.Adjustable friction hinge
US4651382 *Mar 27, 1986Mar 24, 1987Krolick Robert SSolvent-bondable plastic parts with capillary-action blocking moat to confine solvent flow
US4845809 *Mar 21, 1988Jul 11, 1989Pillifant Jr AlbertLeaf spring biased position retentive hinge assembly
US5145101 *Jun 5, 1991Sep 8, 1992Pace IncorporatedTweezer handpiece for installation and removal of electronic components with respect to a substrate and tips and tool for use therewith
US5246157 *Jun 22, 1992Sep 21, 1993Pace, IncorporatedTool for use with tweezer handpiece for installation and removal of electronic components with respect to a substrate
US5355559 *Apr 26, 1993Oct 18, 1994Amerock CorporationHinge for inset doors
US5394913 *Oct 10, 1991Mar 7, 1995Samsonite CorporationHinge for personal leather goods
US5455987 *Apr 4, 1994Oct 10, 1995Svehaug; Oswald C.One-piece hinge
US5472271 *Jun 2, 1994Dec 5, 1995Newell Operating CompanyHinge for inset doors
US5522117 *Nov 2, 1994Jun 4, 1996Clinch River CorporationMoisture proof hinge
US6058566 *Aug 6, 1998May 9, 2000Miner Enterprises, Inc.Breakaway composite hinge structure
US7621022Feb 8, 2006Nov 24, 2009Whirlpool CorporationPlastic top hinge for refrigerator
US8678453 *Mar 23, 2012Mar 25, 2014Newcal LlcPortable door propping apparatus and methods
US20120248797 *Mar 23, 2012Oct 4, 2012Caliguri Nicholas PPortable door propping apparatus and methods
DE4013622A1 *Apr 27, 1990Oct 31, 1990Clip Lok International LtdHinged joint for flat panels - is made from two channel sections connected by flexible strip
Classifications
U.S. Classification16/385, 16/388, 16/DIG.290
International ClassificationE05D5/04
Cooperative ClassificationY10S16/29, E05D5/04
European ClassificationE05D5/04