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Патент USA US2411635

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Nov. 26, 1946.
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F_ PFENT
SPRING DOOR CLOSER
- Filed Feb. 24, 1945
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2,411,635
Patented Nov. 26, 1946
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2,411,635
= _UNITEDSTATES PATENT OFFICE
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Frank Pfent, st. Cla/ir, Mich.
Application February 24, 1945, Serial No. 579,616
12 claims. (c1. 11i-so)v
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and projects upwardly from said head to form
a slide bearing for the upper end portion of an
ticularly those of the type adapted to close a
inclined rod I8 and to further form an upper
door by expansion- of a spring compressed by the
seat for a’spring I9 coiled on said rod. The work
door, in opening.
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arm of Vthe bell crank is terminally formed with
, Objects of the invention are to provide in a
an upwardly open socket 20 in which is set the
simple manner for regulating the spring stress;
reduced and rounded lower end ofthe rod I8. A
to compensate for the y variation in the force
nut 2l threaded on said rod adjacent to its re
exerted by the spring as itt-expands; to adapt the
duced lower end supports a washer 2;2 providing
door- closer by an adjustment to certain different
types of'doors; and to obtain a smooth action by 10 a lowerseat for the spring IS, adjustment of said
nut regulating compression of the spring. A
adapting the spring-compressing element of the
> This invention relates to door closers and par
wire link 23 forms a swinging connection from
the upper end of the arm 5 to a keeper 24 swiveled
actuator to swivelly respond to opening and clos
ing of the door.
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on the door, said keeper having a flange 25
by theconstruction hereinafter described and 15 notched to accommodate the link and the latter
being formed with a terminal head 26 seating
illustrated in the accompanying drawing, where
upwardly against the flange 25. This permits of
These and various other objects are attained
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a quick and easy connection of the device to or
Fig. >1 is a fragmentary interior View of a
screen door in closed position showing my closer
applied and sectionally showing a portion of the
door frame which mounts the closer.
- Fig. 2 is a vertical sectional view of the same
taken on the line 2-2 of Fig. 1, additionally
showing' in dash lines the position of the closer
when the door is opened.
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- f Referring now more particularly to these views
and first describing the construction shown in
Figs. 1 and 2, the reference character I desig
nates a screen door hinged at 2>to the jamb
a door frame. Mymechanism for closing
door comprises a bell crank fulcrumed at 4
having a long power arm 5 and a short work
its disconnection from a door.
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In use of the described construction, the link
23, when _the door is closed, inclines acutely to
the .arm 5' in extending downwardlyv therefrom,
theincluded angle being preferably about twenty
five degrees.. >Opening actuation of the door pro
25 gressivelyincreases this angle which becomes
aboutninety degrees 'when the door is fully open,
as per dash line showing in Fig. 2. Hence the
power arm of the bell' crank is swung down as the
door opens and the work arm is raised, compress
3 of
said 30 ing the spring and sliding the rod >I8 upwardly
through'the top of the frame I'I.f Upon release
and
of the door, expansion of the spring returns the
arm
bell crank> toits normal position, and the door
6, respectively normally extending upwardly from
is closed by the wire link. The expansive effort
the fulcrum and from the latter toward the door.
The fulcrum-'forming bolt 4 is carried by‘a head 35 of the spring Ais gradually applied so that the
door closes at av moderate speed and does not
1 formed on the upper end of a pin 8, said head
slam. It will be noted that >the leverage Yaiîorded
being downwardly slotted at 9 to accommodate
the spring by the work arm is. a maximum'when
the arms 5 -and 6 yat their juncture. The pin 8
lthe door isclosed-"and diminishes progressively
is `swiveled in a bearing VII) ñxed on a shank II
projecting into theY doorway from the jamb 3 and 40 as the door is opened. This tends toward deriva
tion of a' uniform force from the spring since its
clamped by a set screw I2 in a bracket I3 secured
degree of compression increases in proportion to
by screws I4 to said jamb. Í The shank II isof
opening of the door. Swiveling of the `pin 8 in
a length to afford some adjustment (preferably '
the bearing -I 0 adapts the bell crank and frame I‘I
about an inch) in and outoi the bracket and
in many installations a hole I5 willobe drilled in 45 to readily adjusi-l themselves to various vpositions
of the door and assures a free and noiseless action
the jamb to accommodate an excess length of
of the device.
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saidshank. Underlying the bearing I0 is the
. Adjustability of the shank’I I in the bearing I0
head of a‘bolt I6 screwed upwardly into said bear
is useful in adapting the device to doors of vdif
ing and providing alsupport for the lower end of
the pin 8, said end being convexly rounded to 50 ferent thickness. Whena door has swung slight
lyr beyond itsopen position, the wire link 23 as
minimize friction. The bolt IB is so adjusted
sumes
a limiting position flat against the door.
as to hold -the head 1 slightly spaced above the
As applied to a thickmdoor,-thewire’tends to reach
bearing I0. An elongated open frame I'I, pref
this position sooner than in the case of a thin
erably of an inverted U-shape, straddles the
head 'I and is clamped to the latter by the bolt 4 55 one, and this tendency may be overcome by ad
¿2,411,635
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justing the shank I I outwardly in the bracket
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8. In a door closer, the combination with a
frame member and a door member hinged to said
frame member, of a bracket fixed on one of said
members, a bearing carried by said bracket es
tablishing a swivel axis, a pin swiveled in said
bearing, a support fixed on said pin exteriorly of
said bearing, an adjusting screw set into said
What I claim is:
1. In a door closer, the combination with a
frame member and a door member hinged to said
frame member, of a bracket ñxed on one of said
members, a support swivelly carried by said brack
et to turn about an axis substantially parallel to
bearing and terminally engaging said pin to hold
the hinge axis, a lever pivoted on said support to
said support clear of the bearing, a lever pivoted
rock about an axis substantially transverse to 10 on said support to rock about an axis substan
that of the support, said lever forming a work
tially transverse to that of the support, said lever
arm and a relatively long power arm, a swinging `
connection extending from the power arm to the
other of said members for rocking the lever as the
door member is opened, and a spring carried by
said bracket and compressed against said work
arm to resist swinging of the lever incident to
opening of the door member.
2. A door closer as set forth in claim l, said
power arm extending in approximate parallelism
to the hinge axis in the closed position of the door
member.
3. In a door closer as set forth in claim 1, a
bracket anchoring said swinging connection to the
member to which said connection extends said
bracket being swiveled to accommodate itself to
forming a work arm and a relatively long power
arm, a swinging connection extending from the
power arm to the other of said members for rock
ing the lever as the door member is opened, and
_ a spring carried by said bracket and compressed
against said work arm to resist swinging of the
lever incident to opening of the door member.
9. In a door closer, the combination with a
frame member and a door member hinged to said
frame member, of a `bracket fixed on one of said
members, a support swivelly carried by said
bracket, a lever pivoted on said support to rock
about an axis substantially transverse to that of
the support, said lever forming a work arm and a
relatively long power arm, a swinging connection
extending from the power arm to the other of
said connection.
4. In a door closer as set forth in claim 1, a
said members for rocking the lever as the door
is opened, a coiled spring having one end acting
bearing wherein said support is swiveled, and
means for mounting the bearing on said bracket 30 upon the work arm to resist swinging of the lever
at a selective distance from the bracket.
incident to opening of the door, and an abutment
for the other end of said spring ñxed upon the
5. In a door closer, the combination with a
swiveled support,
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frame member and a door member hinged to said
frame member, of a bracket ñxed on one of said
10. In a door closer, the combination with a
members, a bearing carried by said bracket es 35 frame member and a door member` hinged to said
tablishing a swivel axis substantially parallel to
frame member, of a bracket ñxed on one of said
members, a support swivelly carried by said
the hinge axis of the door member, a pin swiveled
bracket, an elongated open frame of an approxi
in said bearing, a support iìxed on said pin ex
mate U shape having its corresponding ends fixed
teriorly of said bearing, an adjusting screw set
into said bearing and terminally engaging said pin 40 on said support, said frame projecting from the
to hold said support clear of the bearing, a lever
support along the extended swivel axis of the sup
pivoted on said support to rock about an axis sub
stantially transverse to that of the support, said
lever forming a Work arm and a relatively long
power arm, a swinging connection extending from
the power arm to the other of said members for
rocking the lever as the door member is opened,
and a spring carried by said bracket and com~
pressed against said work arm to resist swinging
of the lever incident to opening of the door mem
ber,
6. In a door closer, the combination with a
frame member and a door member hinged to said
frame member, o_f a bracket ñxed on one of said
members, a support swivelly carried by said brack~
et to turn about an axis substantially parallel to
port, a lever pivoted on the support to rock about
an axis substantially transverse to said swivel
axis, said lever forming a work arm and a'rela
" tively long power arm„a connection from the other
of said members to the power _arm of saidrlever
for rocking the lever as the door is opened, and
a coiled spring compressed between the work arm
and the yoke end of said frame to resist swinging
of the lever incident to opening of the door mem
ber.
11. In a door closer as set forth in claim 10, a
rod pivotally engaging said work arm and slid
able in the yoke end of the U-shaped frame to
position said spring,
12. In a door closer, the combination with a.
frame member and a door member hinged to the
the hinge axis, a lever pivoted on said support to
rock about an axis substantially transverse to
frame member, of a bracket ñxed on said frame
that of the support, said lever forming a work arm
member and having a portion adjustable to and
and a relatively long power arm, a swinging con 60 from the frame member, a support swivelly car
nection extending from the power arm to the
ried by the adjustable portion of said bracket, a
other of said members for rocking the lever as
lever pivoted on the support to'rock about an axis
the door is opened, a coiled spring having one end
substantially transverse to the swivel axis of the
acting upon the work arm to resist swinging of the
support, said lever comprising a power arm and a
lever incident to opening of the door, and an abut
work arm, a connection from the doormember to
ment for the other end of said spring ñxed upon
said power arm for rocking the lever as the door
the swiveled support.
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member is opened, and a spring carried by the
V'7. In a door closer as set forth in claim 6, a rod
swiveled support and lcompressed against said
extended through the coiled spring and slidable
work arm to resist swinging of the lever incident
in said abutment, said rod having an extremity 70 to opening of the door member.
seated against the work arm and an abutment
carried by said rodY and transmitting the thrust
of the spring to the work arm.
FRANK PFENT.
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