U.S. patent number 3,881,221 [Application Number 05/432,945] was granted by the patent office on 1975-05-06 for invisible hinge.
This patent grant is currently assigned to SOS Consolidated, Inc.. Invention is credited to Harold F. Schmidt.
United States Patent |
3,881,221 |
Schmidt |
May 6, 1975 |
Invisible hinge
Abstract
An Improved Invisible Hinge construction of the type in which
the hinge bodies are recessed into the surfaces of the relatively
immovable parts. The improvement comprises utilization of dense
plastic material having excellent wear and friction-reducing
characteristics in the laminated connectors or the hinge blocks in
a manner to maintain the cantilever strength of the hinge while
improving the wear life and action. This includes incorporating a
similar material in the slide pins which transfix the laminant
connectors.
Inventors: |
Schmidt; Harold F. (Warren,
MI) |
Assignee: |
SOS Consolidated, Inc.
(Birmingham, MI)
|
Family
ID: |
23718205 |
Appl.
No.: |
05/432,945 |
Filed: |
January 14, 1974 |
Current U.S.
Class: |
16/366;
16/DIG.27; 16/360; 16/372; 16/273; 16/361; 16/385 |
Current CPC
Class: |
E05D
3/186 (20130101); Y10T 16/537 (20150115); Y10T
16/5448 (20150115); Y10T 16/5445 (20150115); Y10T
16/548 (20150115); Y10T 16/555 (20150115); Y10T
16/547 (20150115); Y10S 16/27 (20130101) |
Current International
Class: |
E05D
3/06 (20060101); E05D 3/00 (20060101); E05d
003/06 () |
Field of
Search: |
;16/163,164,128
;117/161P,132CF ;252/12,12.2 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
IMB Technical Disclosure Bulletin "Coated Moving Parts and
Installation Method," Vol. 9, No. 7, Dec. 1966, R. J.
Pencsac..
|
Primary Examiner: Gilliam; Paul R.
Assistant Examiner: Troutman; Doris L.
Attorney, Agent or Firm: Barnes, Kisselle, Raisch &
Choate
Claims
I claim:
1. In an invisible hinge construction of the type including a pair
of hinge blocks each to be recessed into relatively movable parts,
each block having a first pivot pin adjacent a face surface
parallel to the axis of hinging and each having a recess forming a
slide portion, a plurality of interdigitally disposed contiguous
sets of slide plates, each set composed of a plurality of plates
and each set having one end transfixed by a pivot pin in one of
said blocks and the other end transfixed by a slide pin parallel to
said pivot pin, and a portion intermediate the ends transfixed by a
second pivot pin parallel to said other pins and independent of
said blocks, that improvement in metal hinge blocks which comprises
a slide plate formed of dense, friction-reducing plastic at each
end of each set of a plurality of metal slide plates, said end
slide plates having a thickness approximately one-half of the metal
plates whereby the two end plates take up space equivalent to one
metal plate, the plastic slide plates being in sliding contact
during motion of the hinge with other plastic slide plates of the
contiguous sets in the hinge and with metal of the recesses in said
hinge blocks.
2. An invisible hinge as defined in claim 1 in which each slide pin
is surrounded with a bushing of dense plastic which moves in
sliding contact with slide surfaces in said hinge blocks, certain
of said bushings bearing against unsupported ends of said plastic
slide plates to maintain assembly position.
Description
This invention relates to Improvements in an Invisible Hinge.
The invisible hinge has been widely used throughout the world for
many years. A basic design is illustrated in U.S. Pat. No.
1,984,092, issued Dec. 11, 1934 to Joseph Soss.
It is an object of the present invention to improve the basic
design by providing structural elements which improve the
load-carrying characteristics while also improving the action of
the hinge.
It is a further object of the invention to improve the design
without basic changes in the dimensions or dies which are already
existing and available in standard practice. Thus, the mechanical
or architectural specifications and standards which have been
longstanding in the industry need not be changed to accommodate the
new design.
The invisible hinge construction has long used a plurality of
laminate links connecting the portions of the hinge which are
recessed in the abutting surfaces (when closed) of the jamb and
door edge. The present invention contemplates providing split
laminate sections formed of a durable dense plastic having bearing
and wear characteristics, these being placed on the opposite sides
of individual laminate stacks to maintain the dimensions of each
stack while improving its wear characteristics and reducing the
need for lubrication and improving the "action" of the hinge. In
addition, bearing sleeves are provided in contact with the outside
laminates and around the transfixing slide pins to increase the
friction-reducing surfaces and further improve the action without
reducing the resistance to cantilever load.
Other objects and features of the invention relating to the
principles of operation and details of construction will be
apparent in the following description and claims wherein is set
forth the best mode presently contemplated for the practice of the
invention.
DRAWINGS accompany the disclosure and the various views thereof may
be described as:
FIG. 1, a view of the inside of a hinge in closed position;
FIG. 2, a view of the outside or back of the hinge in closed
position;
FIG. 3, an end view of the closed hinge;
FIG. 4, an inside view of the hinge in open position;
FIG. 5, a sectional view of the hinge taken on line 5--5 of FIG. 1;
and
FIG. 6, a sectional view of the hinge in open position.
Referring to the drawings, in FIG. 1 the face of the hinge is shown
in the closed position having right and left block body portions 10
and 12. These portions are completely recessed into a door jamb and
the edge of a door respectively so that the hinge is invisible from
the outside when the door is closed. The rear face of the hinge is
shown in FIG. 2. The body portions 10 and 12 have extensions 14-16
and 18-20 respectively, which are provided with screw holes 22 to
secure the hinges in the recessed parts. An end view of the hinge
is shown in FIG. 3.
The blocks or body portions 10 and 12 are each provided with facing
recesses which receive sets of laminated plates to provide the
hinging function. These plates are interdigitally arranged so that
one end of each is pivoted on a first pivot pin located adjacent
the inner face of the hinge blocks. With reference to the drawings,
these first pivot pins are shown in section in FIG. 6. Two sets of
plates designated generally at 30 and 32 are pivoted at one end on
the pin 34 which is introduced through a hole 36. The other sets of
plates 40 and 42 are pivoted on block 12 by a pin 44 introduced
through hole 46. The other ends of these sets of plates are
transfixed by a slide pin shown respectively at 48 and 50 and
intermediate portions of the plate sets are transfixed by a riveted
pin 52 centrally of the assembly. Sectional views 5 and 6 show the
parts in closed and open positions.
The die cast blocks 10 and 12 are provided with slide recesses 60
and 62 respectively open to the inner face which receive the ends
of the slide plate sets which are transfixed by the pins 50 and 48.
Intermediate the top and bottom of these recesses is a stationary
slide bar 64 and on the top and bottom walls of these recesses are
slotted grooves 66 and 68 which serve as locators and guides for
the respective ends of slide pins 48 and 50. Small pockets 70
provide clearance for the rivet heads of rivet pin 52.
In previous hinge constructions, the plate sets 30-32 and 40-42
have been constructed of an equal number of similarly dimensioned
plates which support the cantilever load of a hinged door. Over a
long period of use, the top and bottom plates have a tendency to
wear into the body sections due to the difference in hardness
between the steel links and the zinc alloy body sections. In the
present construction, the plate sets are formed of three equally
dimensioned stamped-out metal plates 72 capped on the top and
bottom by plates 74 of half-thickness to make a total dimension of
four plates. These capping plates are preferably formed of a
durable dense plastic material having a good friction reducing,
non-scratch surface such as Nylon reinforced with molybdenum
disulphide. This material has a good resistance to water, oil and
solvents, and a compressive strength of about 13,000 p.s.i. It can
be stamped into shapes identical with the case-hardened metal
plates 72 and the shaped plates assembled with the metal plates
into the composite and interdigitally arranged plate sets. This
places the plastic material in face-to-face contact between the
plate sets and also in face contact with the top and bottom
surfaces of the block recesses.
The action of the hinge is greatly improved also by the use of
plastic bushings of the same Nylon material around slide pins 48
and 50. As shown in FIG. 4, the top and bottom ends of the slide
pins are inserted respectively in collars or bushings 80 and 82
which slide in the slots 66 and 68. In addition, a slide block 84
surrounds a central portion of pins 48 and 50 having a flat surface
in contact with stationary slide bars 64.
Thus, the metal-to-metal contact has been practically eliminated
and yet, due to the hardness of the plastic material and the manner
in which it has been inserted, the supporting characteristics of
the hinge have not been impaired. The action of the hinging motion
is smooth and resistance to motion has been reduced, as well as the
need for lubrication. In addition, this has been accomplished
without the need for any changes in the outside dimensions of the
hinge so that longstanding architectural specifications need not be
altered. Another important characteristic lies in the fact that the
strength of the hinges has been maintained even though the plastic
may not have the resistance to bending found in the steel
links.
* * * * *