US2939208A

US2939208A - Apparatus for producing a collar or coupling for a tube

Info

Publication number: US2939208A
Application number: US716189A
Authority: US
Inventors: Voorhorst Derk Jan
Original assignee: W J STOKVIS KONINK FABRIEK VAN
Current assignee: W J STOKVIS KONINK FABRIEK VAN; W J Stokvis' Koninklijke Fabriek Van Metaalwerken N V
Priority date: 1957-01-28
Filing date: 1958-02-19
Publication date: 1960-06-07
Anticipated expiration: 1977-06-07

Description

June 7, 1960 n. J. VOORHORST 2,939,208

APPARATUS FOR PRODUCING A COLLAR OR COUPLING FOR A TUBE Original Filed Jan. 28, 1957 2 Sheets-Sheet 1 INVENTOR ATTORNEYS June 7, 1960 D. J. VOORHORST 2,9

APPARATUS FOR PRODUCING A COLLAR OR COUPLING FOR A TUBE Original Filed Jan. 28, 1957 2 Sheets-Sheet 2 INV ENT OR fieni' Jazz l borfiansi' BY 2%;M

ATTORNEYS United States Patent APPARATUS FOR PRODUCING A COLLAR OR COUPLING FOR A TUBE Derk Jan Voorhorst, Arnhem, Netherlands, assignor to W. J. Stokvis Koninklijke Fabriek Van Metaalwerken N.V., Arnhem, Netherlands, a company of the Netherlands Original application Jan. 28, '1957, Ser. No. 636,714. Divided and this application Feb. 19, 1958, Ser. No.

2 Claims. (Cl. 29-235) This invention relates to a tube formed with a collar and, more particularly, to an apparatus for use in the production of the tube collar.

This application is a division of my copending application, Serial No. 636,714, filed January 28, 1957, for Tube and Method and Apparatus for Producing Tube.

Tubes having collars provided as a result of a deformation of the tubes through the medium of internal rings, particularly when simple and capable of being readily formed, satisfy a long felt need. It is an object of the present invention to provide such a tube and especially to provide an apparatus capable of use in the formation of the tube. The invention contemplates the formation of a tube of plastic, rubber or other readily deformable elastic material with a collar which may serve as an abutment for a swivel member such as, for example, a section of a connector.

More specifically, this invention has as an object to provide an apparatus which will permit the formation of a tube with a collar by the use of a ring inserted within the tube, the ring being formed of a material which is harder and less elastic than the material of the tube. A metal ring may be employed. The ring, according to the present invention, has an external diameter which is larger than the internal diameter of the tube and it is maintained in position by the resiliency of the tube.

Since the collar formed on the tube in accordance with this invention results from locally expanding the tube by the insertion of the ring, and since the tube is deformable so that a localized collar will exist on the tube, the collar is capable of use as an abutment or coupling for a swivel or other sleeve member.

When the tube formed in accordance with this invention is to be used in a manner in which pressure will be exerted against the collar, such as when a swivel member is tightened, it is important that the ring be formed of a material of such hardness and strength that it will not compress into the interior of the tube and thereby lose its effectiveness.

In accordance with the preferred form of the invention, the ring is provided with an internal diameter which is substantially equal to the internal diameter of the tube so that the collar will exist externally of the tube and yet the ring itself will provide little or no resistance to the passage of liquids through the tube and thereby will cause no appreciable turbulent fiow and resulting objectionable nolse.

It is possible when the ring is applied within a tube of sufficient elasticity for the ring to be inserted straight into the tube. However, it is the purpose of the present invention to provide an apparatus for making a collar on a tube of plastic, rubber or other readily deformable material by inserting the ring within the tube in a sloping position and subsequently tilting the same until the ring is on a plane practically perpendicular to the axis of the tube and the tube is deformed with an external collar.

Other objects and advantages will become apparent from the following detailed description of the drawings and from the discussion of the manner in which the apparatus can be used in the application of the ring in the formation of the collar on the tube.

In the drawings: 7

Figure 1 illustrates a side elevation of one form of the device made in accordance with the present invention for positioning the ring in the tube.

Figure 2 is a sectional view of the preferred ring formed in accordance with this invention, the ring being adapted to be inserted by the device of Figure 1.

Figure 3 is an enlarged view in side elevation of the head section of the device shown in Figure 1 illustrating in dotted lines the manner in which the ring is placed in position before insertion into the tube.

Figure 4 is an end view of the head section shown in Figure 3.

Figure 5 is a section through the tube into which the head section of the device, with the ring mounted thereon, is inserted in the initial position for the positioning of the ring within the tube.

Figure 6 is a view similar to Figure 5 in which the device has been manipulated to a position wherein the ring is in its final position within the tube.

Figure 7 is a view similar to Figure 6 with the device being tilted for removal from the tube with the ring being retained in its final position.

Figure 8 is a side elevation similar to Figure 1 showing a simplified form of the device, and

Figure 9 is a sectional view, similar to Figure 5, showing the head section of the device of Figure 8, with the ring mounted thereon, in the initial position for inserting the ring in the tube.

Now, in referring to the drawings in detail, reference is made to Figure 1 which illustrates the apparatus or device for the placement of the ring in position. In this figure the device is shown as being formed with the handle 1 and the head section 2, which head section is of generally cylindrical form and preferably should be of a diameter substantially equal to the internal diameter of the tube in which the ring is to be positioned.

Extending forwardly of the head 2 is a rim or finger 3, which is relatively short in the axial direction and which is shaped so as to be slightly conical. The diameter of the finger is such that a small shoulder 4 is formed by the end of the head 2 which it extends beyond the diameter of the finger 3, which shoulder provides an abutting edge for the ring which may be mounted upon the finger.

Extending outwardly from the lower portion of the face of the finger, as illustrated in the drawings, is a stud 5 which has its lower edge onthe same plane as the adjacent portion of the head which forms the shoulder 4. By arranging stud 5 so that it does not project beyond the circumference of the cylindrical head 2 it does not interfere with the positioning of the ring, although, of course, since in the positioning of the ring within the deformable and resilient tube a long stud could be accommodated, the measurement of the stud is not critical.

In the form illustrated in Figures 1, 3 and 4, the head 2 of the device is recessed at 6 and a notch 7 is formed in this recessed section of the head. However, the notch may be form d so as to occupy substantially the entire recessed section, as shown in Figures 8 and 9. The purpose of the formation of the head as thus described will be explained hereafter.

Although the ring to be applied in position within the tube for the formation of the collar thereon may be of modified construction, the preferred form of ring made in accordance with this invention is designated in the drawings with the numeral 8 It will be seen that the preferred ring 8 is rounded on its external surface'a'nd that the interior surface thereof is made cylindrical.

In Figure 3 the head of the device 2 is illustrated with connection with a tube 9 in Figures 5, 6 and 7.

the ring of the form shown portion arranged between the shoulder 4 and the stud 5 in a position capable of being moved as illustrated by the arrow A until the ring abuts the shoulder4 along its entireedge. 1 b The stud 5 is in line with the notch 7 and the stud is restricted in Width for ease of placement of the ring, the stud 5 being required only for the purpose of holding the ring 8 at one side. in its position upon the head at the time that the ring is being placed within the tube; I The manner in which the device of Figure 1 is to be utilized in the positioning of the ring 8 is illustrated in Ring 8 is applied to the device in the manner shown in Figure 3 and then the device with the ring thereon is inserted into the tube 9 in the manner illustrated in Figure 5. The device is inserted into the tube as far as is permitted by the, surface 11 defining one wall ofthe notchl. Limiting surface 11 abuts against the terminal edge 16 ofithe tube 9. As the apparatus is pivoted upwardly in the direction of arrow B in Figure 5, the ring is driven with force into the material from which tube 9 is formed until the ring is perpendicular to the axis of the tube. As the device ,is moved to place the ring 8 in its operative posiiton within the tube 9 it moves about a fulcrum point 12, as illustrated in Figure 5. Point 12 forms the center'of the curve of the surface 11 of notch 7.- It will be clear from the function of the apparatus as thus described that as it is moved in the direction of the arrow B the cylindrical surface of the head 2 moves until it contacts the inner wall of the tube 9 as shown in Figure 6. a

, 'During the movement of the device to the position of Figure 6, the materialofwhich the tube 9 is made is expandedby the ring 8 and a uniform collar 13 is caused to exist on the tube. In order to remove the apparatus from the tube as thus formed with its collar, it is only necessary that the apparatus be moved in accordance with arrowC as illustrated in Figure 7, whereby stud 5 is elevated above the ring and the upper cylindrical por-' tion of the head is removed from contact with the interior of the tube. The apparatus may then be readily withdrawn. v. 7

From the above it will be clear that the formation or the collar 13 upon the tube 9 by the insertion of the ring 8 in accordance with the present invention is very simple and accurate and may be performed very rapidly.

in Figure 2 having its lower a position corresponding to the Figure 6 position; thereafter the device may be withdrawn in the same manner as described above with reference to Figure 7.

Since the tube of the present invention is to be formed with a collar as a result of the deforming of the tube by the driving or forcing ofthe ring into position, it is necessary'that'the material. from which the'tube isconstructed be such that it is elastic andcapable of being deformed and it should have sufiicient resiliency to allow the ring to be held. firmly in its operative position.

T he invention contemplates the use of the tube formed of plastic, rubber or other deformable elastic materials. It may, if desired, be formed of polyethylene or 'nylon. It will also be clear. that the material of -ring 8 must necessarily be harder and'less elastic than the material of the tube, since the ring is utilized to deform the tube and must resist collapsing intothe interior of the tube, particularly under exterior, pressure. Thus, a ring of metal may be employed. i

As has been indicated above, the ring may be inserted into its position within the tube by means'of the novel apparatus constructed in accordance with the present invention. r

Various modifications may be made without departing from the spirit of this invention.

What is claimed is: a I g 1. An apparatus for use in inserting a relatively hard ring within a tube for the formation of an external collar thereon by deformation of the wall of the tube, compris- Furthermore, the apparatus for use with the ring when ,used in theproduction of the tube with a collar in accordance with this invention is inexpensive and assures accuracy.

The position of the ring 8 on the finger 3 (Figure 3),

:theinsertion of the apparatus into the tube 9 (Figure 5),

the swiveling'motion. of the apparatus into the position according to Figure 6, the swiveling motion of the apparatus in thereverse direction and its withdrawal from the tube is a substantially continuous operation requiring very little time and no skill.

The position in which the ring is placed within the tube, and the distance that collar 13 is to be from the recessed portion-6,'then the head of the apparatus may be inserted into the tube until the deepest point 16 of the recess abuts against the terminal edge of the tube. Then, from the position shown "in Figure 9, the device may be pivoted upwardly in the direction of arrow B to ing a handle and a head forwardly of the handle, a finger extending forwardly of the head, said head having a cylindrical pontion with a forward wall projecting beyond the circumference of the finger thereby to form a stop against which a ring may rest when being inserted in a tube, said head having a recess formed therein rearward of said finger so that said finger'can be inserted laterally into a tube having an internal diameter substantially the same as the diameter of the head so that the ring is in an angular position relative to the end of said tube, whereby the ring is positioned by inserting the apparatus laterally into the tube and is then urged into its final position by the upward pivotal movement of the apparatus.

2. An apparatus for use in inserting a relatively hard ring within a tube for the formation of an external collar thereon by deformation of the wall of the tube, comprising a handle and a head forwardly of ,the handle, a finger extending forwardly of the head, said head having a cylindrical portion with a forward wall projecting beyond on-a'center substantially at the line of intersection of the first mentioned wall of the notch with the cylindrical surface of the head, whereby the ring is positioned by inserting th apparatus into the tube" at an inclination and is then, urged into its finalposition by the movement of the apparatus about said center point, the ring being then guided into its ultimateposition by the curvature of said second wall of the notch without displacement.

References Cited in the file of this patent UNITED STATES PATENTS 2,276,303 Herrig ..l r Mar. 17, 1942 2,775,025: Williams Dec. 25, 1956 FOREIGN PATENTS 7 354,046 France July 17, 1905