Shaped seal for sealing a power-operated closing device
View Patent ↗The invention relates to a shaped seal for sealing a power-operated closing device comprising a jam-protection zone, which has at least two electrically conductive areas, situated at a distance from each other. According to the invention, to save space and reduce weight and cost, the carrier is used as a metallic conductor for the conductive area so as to reduce volume resistance. Alternatively or in addition thereto, a frame can be used to which the shaped seal can be fixed.
1. A shaped seal for a powered closing device comprising:
a clamping portion including a metallic carrier surrounding a recess in the clamping portion;
an anti-trap guard portion including first and second electrically conductive portions separated by a space;
the anti-trap guard portion being deformable for moving the first and second electrically conductive portions into contact with each other through the space, resulting in a switching action affecting operation of the powered closing device;
a metallic conductor in electrical contact with the first electrically conductive portion for reducing volume resistivity of the first electrically conductive portion; and
the metallic carrier being in electrical contact with the second electrically conductive portion for reducing volume resistivity of the second electrically conductive portion.
2. The shaped seal of claim 1 in which the metallic carrier is at least partially embedded within the second electrically conductive portion.
3. The shaped seal of claim 2 in which the second electrically conductive portion within which the metallic carrier is embedded extends within the clamping portion.
4. The shaped seal of claim 2 in which the metallic conductor is at least partially embedded within the first electrically conductive portion.
5. The shaped seal of claim 1 in which the metallic carrier is at least partially embedded within both the anti-trap guard portion and the clamping portion.
6. The shaped seal of claim 5 in which the metallic carrier has a U-shaped cross section surrounding the recess in the clamping portion.
7. The shaped seal of claim 1 in which a nonconductive cover at least partially surrounds the anti-trap guard portion.
8. The shaped seal of claim 7 in which the first and second electrically conductive portions, the metallic conductor, and the metallic carrier are surrounded by nonconductive material.
9. The shaped seal of claim 1 in which the shaped seal is formed from a base material and the first and second electrically conductive portions are made by adding an electrically conductive material to the base material.
10. The shaped seal of claim 1 further comprising a sealing portion within which the anti-trap guard portion, the sealing portion being deformable for moving the first and second electrically conductive portions into contact with each other through the space within the hollow chamber.
11. A shaped seal for a powered closing device mountable on an electrically conductive flange or frame comprising:
a clamping portion including a carrier shaped as a clasp surrounding a recess in the clamping portion for securing the shaped seal to the electrically conductive flange or frame;
an anti-trap guard portion including first and second electrically conductive portions separated by a space;
the anti-trap guard portion being deformable for moving the first and second electrically conductive portions into contact with each other through the space, resulting in a switching action affecting operation of the powered closing device;
a metallic conductor in electrical contact with the first electrically conductive portion for reducing volume resistivity of the first electrically conductive portion; and
a part of the second electrically conductive portion extending within the clamping portion for electrically contacting the conductive flange or frame to reduce volume resistivity within the second electrically conductive portion.
12. The shaped seal of claim 11 in which the clamping portion includes protuberances projecting into the recess for contacting the conductive flange or frame and in which the protuberances are at least partially formed by the part of the second electrically conductive portion that extends within the clamping portion.
13. The shaped seal of claim 11 in which the carrier is formed by a non-electrically conducting material.
14. The shaped seal of claim 13 in which the carrier includes recesses that are filled by the second electrically conductive portion.
15. The shaped seal of claim 11 in which the shaped seal is formed from a base material and the first and second electrically conductive portions are made by adding an electrically conductive material to the base material.