US3066348A - Door closer - Google Patents

Description

Dec. 4, 1962 F. J. J. TRAPMAN 3,066,348

DooR CLOSER Filed March 18, 1960 2 Sheets-Sheet l I l I' 24 4" /7 ,'II:` f ll"`` l I l l I l f g l l g l,l Z7 ,f fl, l, g l l l l' L Z @MMM/M,

Dec. 4, 1962 F. J. J. TRAPMAN DOOR CLOSER 2 Sheets-Sheet Filed March 18, 1960 W m AU/J n .y .JI-.lil UmuD l d] y 9 www J -,L; s 6 w w 4 JJ VA E n 2 rm @W Q m W Unite gates 3,666,348 Patented Dec. 4, 1962 dice 3,656,343 DGR CLGSER Franciscus J. J. Trapman, isaae da Ccstralaan 38, Bussum, Netherlands Filed Mar. 18, 1960, Ser. No. 15,854 2 Claims. CL 16-57) The invention relates to .a door closer consisting of a U-shaped frame and a lever both manufactured in thin stamped metalsheet and rotatably mounted with respect to each other and provided with a buffer which on one side is pivoted to the frame and on the other side to the lever, whereas at the end of the lever a rubber roller is pivoted in a bearing.

Door closers of this kind have generally well satisfied in practice. However they have the disadvantage that as the shafts are bearing in the relatively thin sheet iron of the frame and the lever, the holes after a short use show a great play so that the frame and the lever must be renewed and thus the whole door closer must be replaced by a new one. Therefore the known door closers are not economical.

It is the main object of the present invention to abolish this disadvantage by fixing all rotating shafts or bearings with respect to the frame and the lever so that these members which are submitted to wear can easily and at low cost be replaced by new spares.

Beside the cited advantage the invention offers still The roller of the door closer is proinvention will appear from the following description in which on the basis of the drawings a form of embodiment of the door closer according to the invention will be explained; in the drawings are:

FIG. 1 a side View of the complete door closer;

FIG. 2 a cross-section along the line II-II of FIG. 1;

FIG. 3 a side view of the upper rotary shaft of the buffer;

FIG. 4 a side view of the lever;

FIG. 5 a side view of the frame;

FIG. 6 a side view of the screw for fixing one bearing of the lever to the frame;

FIG. 7 a front View of a bronze ring for one bearing of the lever in the frame;

FIG. 8 a side view of the ring of FIG. 7;

FIG. 9 a side View of the hollow shaft fitting in the ring of FIG. 7;

FIG. l0 an end view of the shaft for the rubber roller;

FIG. 11 a side view of the shaft of FIG. 10;

FIG. l2 a side view of nut for the shaft of FIGS. and 11;

FIG. 13 a front view of the roller; and

FIG. 14 a side view of the roller.

parts of the buffer 27 the spring loaded piston and the inner end of its piston-rod are not shown, for these parts do not belong to the present invention.

door closer according to the invention all bearings or rotating shafts in which the rotation-angle is large are fixed with respect to the frame or the lever so that the wear in these parts is completely abolished.

FIG. 5 shows a side view of the frame 1, the bores 4 are destined for the connecting screws on the doorpost. Bore Z is destined for a tap of the lower bearing of buffer 27. The rotation angle being small no special measures are necessary for those bearings.

The most important bearings are the bearings 3 of the lever 5 in the frame 1 (see FIGS. 1, 2, 4, 6, 7, 8, and 9). In the opening 7 of the lever 5 the ring 19 consisting of sintered bronze powder is placed. The flange 18 of the ring lies between an inner face of the frame 1 and an outer face of the lever 5, and with the cam 20 of ring 19 fitting in the slot 7 of lever 5 to fix the ring to the lever for rotation therewith. Through the center opening of the ring 19 (see FIGS. 7 Aand 9) the hollow shaft 21 is passed which at the inner side rests with a collar against the ring 19. On the other side the shaft 21 is provided with two flat parts 22 with which the shaft 21 rests against the flat sides 3 of the hole 3. The shaft 21 is provided with a threaded bore 23 through which the screw 24 is passed which is fixed by means of a washer on the screw 24. Thus in practice the bronze ring 19 is fixed in the lever 5 to turn on the shaft 21, which is fixed in one side of the frame 1. When these bearings are worn out only the rings 19 and the shafts 21 have to be renewed.

The shaft 17 for the upper bearing of the piston rod is provided at one side with flattened parts 17' fitting in of the lever 5 (see FIG. 4); through these flattened parts a bore has been provided for the passing of a split pin 26 (see FIG. 1). As in this manner the shaft 17 is fixed with regard to the lever 5 no wear can occur in the lever on this place.

The rubber roller 9 with its mounting parts are shown in FIGS. l, 4, 10, 11, 12, 13, and 14. The rubber roller central sleeve 11 turning on the the lever 5 in the At one side the shaft 12 is provided with a smaller side of the lever of the rubber roller 9 and the hole 6 with the flattening 6 the position of this shaft is lixed by the said lever having a hole and a slot therein for receiving said flanged ring, a cam on said ring .adapted to be received in the slot in the lever, the flange of the ring being disposed between one leg of the U-shaped frame and the lever, a shaft having a threaded bore adapted for reception in said flanged ring, said shaft having flattened l? 2. A door closer as dened in claim 1, wherein the roller is provided Awith a shaft having a at side and being threaded at one end and provided with a thickened head at its opposite end, and wherein the lever is provided with a Ihole having a at side, the hole receiving the shaft with the at side of the latter in cooperating engagement with 'the flat side of the hole, whereby to resist rotation of the shaft with respect to the lever, and a nut turned on to the threaded portion of said shaft to secure the latter'to said lever.

UNITED STATES PATENTS Stuart June 28, 1887 Lernp July l0, 1906 Huber Nov. 20, 1923 Hoen Jan. 15, 1929 Shonnard May 7, 1929 Woernle Dec. 26, 1939 Trapman Apr. 4, 1950

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