Claims
- 1. In a stop device for combination with two parts which consist of a door post and a door mounted on the post to pivot about a pivot axis, the device comprising an arm for mounting on one of said parts to pivot about an axis parallel to said pivot axis and having two opposed edges, a bracket member for fixing to the other of said parts and comprising two parallel branches, two rollers mounted between the parallel branches of the bracket member, one of the rollers being fixed in translation relative to the bracket member and the other roller being movable in translation relative to the bracket member, a rocker, a pin pivotally mounting the rocker between the branches of the bracket member, the movable roller being mounted on the rocker, elastically yieldable means for subjecting the rocker to an elastic torque which creates a pressure of contact between each of the two rollers and the opposed edges of the arm, the arm defining a stop recess for receiving and retaining the fixed roller in the open position of the door: the improvement wherein the branches of the bracket member are part of a U-section centre portion of the bracket member and two large wing portions extend symmetrically from each side of the centre portion in a direction perpendicular to the branches, said pin having two portions extending beyond the branches in the region of the wing portions, said elastically yieldable means comprising two helical windings which form a torsion spring and are respectively mounted on each of said two pin portions and have a first portion which bears against the corresponding wing portion which includes an abutment for said first portion, and a second portion which bears against the rocker, the U-section centre portion comprising a transverse portion which is located adjacent an edge of the wing portions and is substantially perpendicular to the wing portions so that the pivotal arm engaged between the two rollers can move while remaining spaced away from said transverse portion of the U-section centre portion.
- 2. A device as claimed in claim 1, wherein the two helical windings are part of a single torsion spring which comprises a centre stirrup portion which bears against the branches of the rocker and interconnects adjacent ends of the windings.
- 3. A device as claimed in claim 1, wherein said abutment of each wing portion comprises a flange which is substantially at a right angle to the corresponding wing portion.
- 4. A device as claimed in claim 1, 2 or 3, wherein the U-sectioned centre portion of the bracket member comprises a first part adjacent to the transverse portion between the branches of which first part the fixed roller is mounted and a second part which is wider than said first part between the branches of which second part the rocker is pivotally mounted.
- 5. A device as claimed in claim 1, 2 or 3, wherein the stop recess which receives the fixed roller is formed in one of said two opposed edges of the arm and comprises a ramp portion which defines an angular boss and an end side portion constituting a positive abutment for the fixed roller.
- 6. A device as claimed in claim 5, wherein the other of said two edges of the arm has a region having a convex curvature in the region of the boss.
- 7. A device as claimed in claim 6, comprising, connected to said region of convex curvature of the edge, a concave side of an angular boss which forms an elastic abutment for the movable roller when, the door in the open position, the fixed roller is engaged in the stop recess without being in contact with said end side portion.
- 8. A device as claimed in claim 1, 2 or 3, for an arrangement in which the arm is progressively inserted in said other of said parts during the opening of the door, wherein the stop recess is disposed in the vicinity of an end of the arm which is adapted to be pivotally mounted on said one of said parts.
- 9. A device as claimed in claim 8, wherein said one of said parts is the door.
- 10. A device as claimed in claim 1, 2 or 3, for an arrangement in which the arm is drawn out of said other of said parts during the opening of the door, wherein the stop recess is disposed in the vicinity of an end of the arm opposed to the end adapted to be pivotally mounted on said one of said parts.
- 11. A device as claimed in claim 10, wherein said one of said parts is the door.
- 12. A device as claimed in claim 1, 2 or 3, comprising an intermediate stop recess on the arm corresponding to a partly-opened position of the door.
- 13. A device as claimed in claim 1, 2 or 3, wherein each roller comprises two cylindrical rings which are fitted one inside the other, each ring having at one end a planar flange extending radially outwardly of the ring, the flange of the inner ring having such radial dimension that it extends beyond the cylindrical surface of the outer ring so that a sliding contact is provided not only radially between the two rings but also axially between the ring flanges and the lateral surfaces of the pivotal arm.
- 14. A device as claimed in claim 13, wherein the two rings are provided with a coating of a material having a low coefficient of friction.
- 15. A stop device for a pivotal door, comprising an arm adapted to be pivotally mounted, by means of a pin parallel to the pivot pin of the door, on one of two parts consisting of the door and the fixed post on which the door is mounted, said arm having the shape of a strip having opposed edges against which edges are applied two rollers which are mounted between parallel branches of a bracket member which is adapted to be fixed to the other part of said two parts, one of the rollers being fixed and the other roller being movable and subjected to an elastically yieldable torque which creates a pressure of contact between each of the two rollers and the arm, the arm being provided with a stop recess for retaining the fixed roller in the open position of the door, the elastically yieldable torque being produced by a torsion spring comprising a centre stirrup portion interconnecting adjacent ends of two helical windings which are mounted symmetrically on each side of the branches of the bracket member about extensions of a pin which extends through the branches of the bracket member, which branches are part of a U-sectioned centre portion of the bracket member on each side of which centre portion are symmetrically formed two large wing portions which are perpendicular to the branches and have two spaced-apart abutments against which abutments bear ends of the respective windings opposed to the branches, the U having a transverse portion which is roughly perpendicular to the wing portions so that the pivotal arm engaged between the rollers is capable of moving while remaining spaced away from the transverse portion of the U, wherein the movable roller is rotatively mounted on a transverse portion of the centre stirrup portion of the torsion spring so that it is directly subjected to the elastically yieldable torque.
- 16. A device according to claim 15, wherein the distance between the branches of the U-sectioned centre portion of the bracket member is constant.
- 17. A device according to claim 15 or 16, wherein each roller comprises two cylindrical rings which are fitted one inside the other, each ring having at one end a planar flange extending radially outwardly of the ring, the flange of the inner ring having such radial dimension that it extends beyond the cylindrical surface of the outer ring so that a sliding contact is provided not only radially between the two rings but also axially between the ring flanges and the lateral surfaces of the pivotal arm.
- 18. A device according to claim 17, wherein the two rings are provided with a coating of a material having a low coefficient of friction.
Priority Claims (2)
Number |
Date |
Country |
Kind |
78 29777 |
Oct 1978 |
FRX |
|
80 05870 |
Mar 1980 |
FRX |
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DESCRIPTION
This application is a Continuation-In-Part of our application Ser. No. 84,071 of Oct. 12, 1979 now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2693616 |
Cromwell et al. |
Nov 1954 |
|
2787019 |
Galla |
Apr 1957 |
|
3837040 |
Keller et al. |
Sep 1974 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
1584227 |
Aug 1970 |
DEX |
1054608 |
Feb 1954 |
FRX |
1133128 |
Mar 1957 |
FRX |
1505703 |
Mar 1978 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
84071 |
Oct 1979 |
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