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Publication numberUS897825 A
Publication typeGrant
Publication dateSep 1, 1908
Filing dateFeb 3, 1908
Priority dateFeb 3, 1908
Publication numberUS 897825 A, US 897825A, US-A-897825, US897825 A, US897825A
InventorsMichael J Flynn
Original AssigneeEdward W Mccarty, Michael J Flynn
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door-check.
US 897825 A
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Description  (OCR text may contain errors)

' 11m PATENTED SEPT. 1, 1908.

M. J. mmm. DOOR CHECK APPLIOATON FILED .TUNE Z4, 1906. BENBWED FEB. 3, 1908.

.t 'le manner indicated in Fig. 2.

UNTTED s TATEs PATENT oral.'

MICHAEL J. FLYNN, or New YORK, N. Y., AssIeNoR 'O F .ONE-HALF To EDWARD w. MCcAnTY, or BROOKLYN, NEW YORK.

DOOR-CHECK.

Specicaton of Letters Patent.

Patented sept. 1, 190e.

. Application tiled June' 24, 1905, .Serial No. 266,737. B enewei February 8, 1908. .Serial No. 414,059.

To all whom may concern."

Be it known that I, MicnAEn J FLYNN, a citizen of the United States, residing at the city of New York, in the 4borough-of Brooklyn and State of New York, have invented certain new and useful lm )rovements in Door-Checks, of which the fol owing is a full, clear, and exact description.

My inventio11,relates to door checks, and has articular reference to the provision of a checljr which is concealed within the door frame or jamb.

A further ob'ect of the invention is to provide a check wliich allows the door to swing freely during its inward movement, exerting a temporary check for a short distanceonly, as the door approaches its closed relation.

In the drawings, Figure l is a sectional view showing the door partly closed Fig. v2 is a similar view showing the door in its l'ully closed relation.

v. In carr ing o'ut my invention 1l make use of Aa tubu ar casing inset into the door j'amh, and having aflexible connection rod attached to the door, 'and -spring pressed inwardly within said casing. I also attach a checking cylinder tothe inner end of said connection 'rod which impedes its movement as theldoor approaches lts closed relation. For this purpose the connection rod is resilient in the direction ol' its length, and capable of transmitting the compression stresses incident to said checking action. I V

.Referring tothe drawings, 1 denotes the door hinged to thejamb 2, at the point 3, and having an anchorage 4 therein, with a tubular extension 5. 'lhc anchorage has a llange (i by which it is secured in place. i

A7 denotes a socket contained within the, anchorage and -secured in place by a pin 1() having a milled head 1.1, and passed through an opening 9, and the walls of said tube 5.

12 denotes thc connor-,tion rod conveniently formed of resilient steel wire cable, having a ball 13 contained within a rounded part 14 of the socket 7. 'lh'c connection rod extends into the tubular casing 16 within a recess 15'in the door jamb, and is guided to move centrally thereof by antil'riction rollers 17 and 172. v The headv 21 of the checking c linder is soldered to the connection rod in 19 designates a line spiral spring upon the connection rod 12, which prevents the strands from spreading in use. At the inner end ol' the cylinder is arranged a head 22 against whicha powerful returning spring 2() bears, so as to nnpel the cylinder and the connection rod 12 1n a direction to close the door.

24 designates a -iston rod passed through the head 22, Whiclll has a gland or stulii'ng box 25 in order to make a water tight joint.

26 indicates an enlargement on the piston .rod against which presses the spring 27 tendring to press the piston rod outward.

28 designates the piston which is not tight upon the piston rod, but loosely surrounds a redua-ed portion' 3() thereof, and is capable of longitudinal movement until it abuts against the shoulder 29. The relation is such that when the motion of the piston rod impels the iiston against the shoulder 2S), a water tight Joint is formed, but under other conditions the lluid is able to pass freely through the loose connection between the piston and piston rod.

Au additional feature. of the invention re,- latcs to the bore ol' the checking cylinder,

ton at one end, as shown at 3d, but is considerably enlarged at its other end, as indicated -at 32. '.lhc` piston is lillcd with glycerin or other viscous fluid through a duct 33, having a screw 34, bywhich it is closed.

35 indicates a hole through the outcr casing, by which the screw is removed.

' The operation is as follows: 'lhe door being open in the relation shown in Fig. 1, theI connection rod 12 is withdrawn outward so that the checking cylinder occu )ies a position near the open end of the tu )e or casing 16. In this relation the pistoni rod 24 is fully projected 4from the checking cylinder, but it is not long enough to reach the inner wall of the tubular casing under thesecircumstanccs. I influence of thr'monnxection rod ilnpelled by the spring 20, the piston rod eventually abuts against the inner. -wal l ol thetubulaal1 casing so that the momentum of the-door is checked,

cumstances, the 'door slowly approaches its latching position, and when the piston passes beyond the closely litting bore 3l the i'rce movement isresul'ned so that the door latches freely. When the door is opened, the `piston no longer lits closely against the As the door closesunder the ,I

".lhis occurs when the door' is a few inches' irom latclung posit1on.` .Under these cir` ywhich is oi' a diameter to closely lit the pisiston rod. W at I claim, is 41. In a door check, a tubular casing adapt- V fed to be 'inset'.into the door j amb, a checking receive ,said ball, a

fss

cylinder contained therein, a closing spring for im elling-Said checking cylinder inward,

a4 ,resiient connection rod secured to the checking cylinder and havinga ball at'its free end, and an anchorage adapted to be secured to the door and having a socket to Aloosely receive said ball.

2. In a door check, a casing adapted to be inset into the door jamb, a checking cylinder contained therein, a closing spring for impelling said checking cylinder inward, a resilient rod secured to the cylinder and having a hall thereon, an anchorage adapted to be secured to the door and adapted to loosely iston rod projecting from said checking cy inderand arranged to impinge against the inner wall of said casing as the checking cylinder movesinward, and means whereby'said piston rod accelerates the checking action for only a portion of its movement into the checking cylinder.

3. In a door check, a casing adapted to be inset into'the door jamb, a checking cylinder contained therein, a closing spring for impelling said checking cylinder inward, a piston rod projecting from the inner end of said checking cylinder, and having a reduced portion within the cylinder,l a piston surroundling said reduced portion, and 'adapted to have a limited'longitudinal movement upon said piston rod, said checking cylinder havr 'ing a bore closely fitting saidpiston at one 40 end -and an enlarged bore at the other, a spring for`impelling said piston rod outward from the checking cylinder, a connection rod secured to said cylinder, and an anchorage adapted to receive said connection rod.

"4. lIn a door check, a casing adapted to be inset into the door jamb, a checking cylinder contained therein, a closing spring for iinpelling said checking cylinder inward, a piston rod projecting from said cylinder and arranged to exert a resistance for a portion of its inward movement therein, a steel wire connection rod secured to said cylinder, and

means upon the door for removably receiving said connection rod.

5. In a door check',l a caslng adapted to be 4inset into the door amb, a checking cylinder contained therein, a closing spring for impelling said checking cylinder inward, a piston rod projecting from said cylinder and arranged to exert a resistance for a portion of its movement into thecylinder, a steel wire connection rod secured to said cyllnder, av

ball on said connection rod, and an anchorage upon the door arranged to removably receive said ball.

6. In a door cheeka casing 'adapted to be f inset into the `door j amb, a checking cylinder contained therein, a closing spring for impelling said checking cylinder inward, a piston rod projecting from said cylinder, va resilient steel wire cable connection rod secured to said cylinder and projecting outwardly through the open end of said casing, antifriction rollers engaging said connection rod, and an anchorage upon the door arranged to removably receive said connection rod.

In witness whereof, I subscribe my signature, in the presence of two witnesses.

\ MICHAEL J. FIJYNN,

Witnesses;

WM. AM. S'rooigarnon, FRANK S. Onnn.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3531820 *Nov 7, 1967Oct 6, 1970Koivusalo Mauno KaleviAction mechanism for door closer
US5016317 *May 14, 1990May 21, 1991Hung Sheng HuLightly-operating automatic door closer with double cylinders
US5170530 *Oct 11, 1990Dec 15, 1992Reilor LimitedDoor closer
Classifications
Cooperative ClassificationE05F3/108