Claims
- 1. A door closer comprising:
- a housing;
- a cam device for converting between rotary motion and axial motion during an opening and closing of a door;
- said cam device being disposed at least partially within said housing;
- an energy storage device for storing energy during an opening of a door for subsequently closing a door;
- said energy storage device being functionally connected to said cam device to act on said cam device to urge a door to a closed position;
- a piston;
- said piston being disposed in said housing and being moveable by said cam device;
- said piston being disposed in contact with said energy storage device;
- said piston comprising an inner part and an outer part;
- said inner part of said piston being connected to said cam device;
- said inner part of said piston being disposed within said outer part of said piston;
- said outer part of said piston being frictionally and interlockingly connected to said inner part of said piston;
- a pin;
- said pin being disposed within said outer part of said piston;
- said pin being disposed to connect said inner part of said piston to said cam device;
- said piston being disposed to divide said housing into first and second chamber portions;
- each of said first and second chamber portions containing damping medium;
- said door closer comprising a flow path fluidly connecting said first and second chamber portions to one another;
- said outer part of said piston comprising a portion;
- said portion of said outer part being disposed to surround said inner part of said piston;
- said portion of said outer part comprising a surface disposed to face said inner part of said piston;
- said surface of said portion comprising a region disposed to define a groove extending about said inner part of said piston;
- said region of said surface being disposed to define at least a portion of a ring-shaped channel extending about said inner part of said piston; and
- said ring-shaped channel being a portion of said flow path.
- 2. The door closer according to claim 1, wherein:
- said ring-shaped channel represents a first channel;
- said housing has a longitudinal axis;
- said housing has a first end and an axially opposite second end;
- said second end of said housing is disposed adjacent to said cam device;
- said first chamber portion of said housing is disposed between said first end of said housing and said piston;
- said piston is movable towards said first end of said housing during an opening movement of a door;
- said flow path comprises a second channel;
- said second channel is disposed in said outer part of said piston to fluidly connect said ring-shaped channel and said first chamber portion to one another;
- said door closer comprises a valve disposed within said second channel of said flow path; and
- said valve is disposed to substantially open said second channel of said flow path during an opening of a door and to substantially close said second channel of said flow path during a closing of a door.
- 3. The door closer according to claim 2, wherein:
- said inner part of said piston comprises a first surface disposed to face said outer part and substantially parallel to the longitudinal axis;
- said first surface is disposed adjacent to said cam device;
- said first surface of said inner part extends around the longitudinal axis;
- said inner part of said piston comprises a second surface disposed to face said outer part and substantially parallel with the longitudinal axis;
- said second surface is disposed adjacent to said first chamber portion;
- said second surface of said inner part extends around the longitudinal axis;
- said inner part of said piston comprises a third surface facing said outer part and extending between said first and second surfaces of said inner part;
- said third surface of said inner part is disposed at a substantial angle with respect to the longitudinal axis;
- said ring-shaped channel comprises an edge;
- said third surface is disposed to define said edge of said ring-shaped channel upon said outer part of said piston being connected to said inner part of said piston;
- said flow path comprises a third channel; and
- said third channel of said flow path is disposed to fluidly connect said ring-shaped channel and said second chamber portion of said housing to one another.
- 4. The door closer according to claim 3, wherein:
- said inner part of said piston comprises a tubular extension;
- said second surface of said inner part of said piston is disposed on said tubular extension;
- said tubular extension extends a substantial distance from said third surface of said inner part towards said first end of said housing;
- said tubular extension is disposed substantially parallel to the longitudinal axis;
- said tubular extension comprises a first internal bore disposed substantially concentrically about the longitudinal axis;
- said tubular extension defines said first internal bore;
- said outer part of said piston comprises a tubular portion disposed between said tubular extension of said inner part and said first end of said housing;
- said tubular portion of said outer part comprises a second internal bore disposed substantially concentrically about the longitudinal axis;
- said tubular portion of said outer part defines said second internal bore;
- said door closer comprises a connecting body disposed in said housing;
- said connecting body is substantially cylinder-shaped;
- said connecting body is disposed substantially concentrically about the longitudinal axis;
- said connecting body comprises a first end portion and an axially opposite second end portion;
- said first end portion of said connecting body is disposed to extend through said tubular portion of said outer part; and
- said first end portion of said connecting body is disposed to threadingly engage with said internal bore of said tubular extension to substantially rigidly connect said inner and outer parts of said piston to one another.
- 5. The door closer according to claim 4, wherein:
- said cam device comprises a shaft;
- said shaft has an axis of rotation defined substantially perpendicular to the longitudinal axis of said housing;
- said shaft is disposed and configured to rotate in a first direction during an opening movement of a door;
- said shaft is disposed and configured to rotate in a second direction during a closing movement of a door;
- said cam device comprises a plate;
- said plate is disposed within said housing;
- said plate is attached to said shaft to rotate with said shaft;
- said cam device comprises a first roller and a second roller;
- said first roller and said second roller are movable together in a first direction substantially parallel with the longitudinal axis of said housing;
- said first roller and said second roller are movable together in a second direction substantially parallel with the longitudinal axis of said housing;
- each of said first and second rollers are disposed in camming contact with said plate to operatively convert between rotary displacement of said plate and axial displacement of said first and second rollers;
- each of said first and second rollers are operatively connected to said pin; and
- said energy storage device comprises at least one spring disposed in said housing.
- 6. A door closer comprising:
- a housing;
- said housing having a longitudinal axis;
- a cam device for converting between rotary motion and axial motion during an opening and closing of a door;
- said cam device being disposed at least partially within said housing;
- an energy storage device for storing energy during an opening of a door for subsequently closing a door;
- said energy storage device being functionally connected to said cam device to act on said cam device to urge a door to a closed position;
- a piston;
- said piston being disposed in said housing and being moveable by said cam device;
- said piston being disposed to contact said energy storage device;
- said piston comprising an inner part and an outer part;
- said inner part of said piston being connected to said cam device;
- said inner part of said piston being disposed within said outer part of said piston;
- said outer part of said piston being frictionally and interlockingly connected to said inner part of said piston;
- a pin;
- said pin being disposed within said outer part of said piston;
- said pin being disposed to connect said inner part of said piston to said cam device;
- said piston being disposed to divide said housing into first and second chamber portions;
- each of said first and second chamber portions containing damping medium;
- said door closer comprising a flow path fluidly connecting said first and second chamber portions to one another;
- said inner part of said piston comprising a portion;
- said portion of said inner part being disposed adjacent to said pin;
- said flow path comprising a ring-shaped channel;
- said ring-shaped channel being disposed within said portion of said inner part of said piston;
- said ring-shaped channel extends around the longitudinal axis of said housing;
- said ring-shaped channel represents a first channel;
- said flow path comprising a second channel;
- said second channel being disposed within said inner part of said piston; and
- said second channel being disposed to fluidly connect said ring-shaped channel with said second chamber portion of said housing.
- 7. The door closer according to claim 6, wherein:
- said outer part of said piston comprises an annular portion having an inner periphery;
- said annular portion of said outer part comprises a groove disposed on said inner periphery of said annular portion;
- said groove is disposed adjacent to said cam device;
- said groove extends around the longitudinal axis of said housing;
- said door closer comprises a ring-shaped member; and
- said ring-shaped member is at least partially disposed within said groove to prevent relative axial movement between said inner and outer parts of said piston.
- 8. The door closer according to claim 7, wherein:
- said housing has a first end and an axially opposite second end;
- said second end of said housing is disposed adjacent to said cam device;
- said outer part of said piston comprises a tubular portion;
- said tubular portion of said outer part is disposed between said inner part of said piston and said first end of said housing;
- said tubular portion of said outer part is disposed to define an internal bore substantially concentric with the longitudinal axis;
- said door closer comprises a connecting body disposed in said housing adjacent to said first end of said housing; and
- at least a portion of said connecting body is disposed to threadingly engage with said internal bore of said tubular portion of said outer part to substantially rigidly connect said inner and outer piston parts to one another.
- 9. The door closer according to claim 8, wherein:
- said door closer comprises a valve disposed within said flow path;
- said valve is disposed to open said flow path during an opening of a door and to close said flow path during a closing of a door;
- said cam device comprises a shaft;
- said shaft has an axis of rotation defined substantially perpendicular to the longitudinal axis of said housing;
- said shaft is disposed and configured to rotate in a first direction during an opening movement of a door;
- said shaft is disposed and configured to rotate in a second direction during a closing movement of a door;
- said cam device comprises a plate;
- said plate is disposed within said housing;
- said plate is attached to said shaft to rotate with said shaft;
- said cam device comprises a first roller and a second roller;
- said first roller and said second roller are movable together in a first direction substantially parallel with the longitudinal axis of said housing;
- said first roller and said second roller are movable together in a second direction substantially parallel with the longitudinal axis of said housing;
- each of said first and second rollers are disposed in camming contact with said plate to operatively convert between rotary displacement of said plate and axial displacement of said first and second rollers;
- each of said first and second rollers are operatively connected to said pin; and
- said energy storage device comprises at least one spring disposed in said housing.
- 10. A door closer comprising:
- a housing;
- said housing having a longitudinal axis;
- cam means for converting between rotary motion and axial motion during an opening and closing of a door;
- said cam means being disposed at least partially within said housing;
- energy storage means for storing energy during an opening of a door for subsequently closing a door;
- said energy storage means being functionally connected to said cam means to act on said cam means to urge a door to a closed position;
- a piston;
- said piston being disposed in said housing and being displaceable by said cam means;
- said piston being disposed to contact said energy storage means;
- said piston comprising an inner part and an outer part;
- said inner part of said piston being connected to said cam means;
- said inner part of said piston being disposed within said outer part of said piston;
- said outer part of said piston being frictionally and interlockingly connected to said inner part of said piston;
- said door closer comprising a member;
- said member being disposed within said outer part of said piston;
- said member being disposed to pin said inner part of said piston to said cam means to transfer axial motion of said cam means to said piston;
- said outer part of said piston comprising a portion;
- said portion of said outer part comprising an annular groove extending around the longitudinal axis of said housing;
- said groove being disposed adjacent to said member;
- said door closer comprising a ring-shaped member; and
- said ring-shaped member being disposed within said groove to prevent relative axial movement between said inner and outer parts of said piston.
- 11. The door closer according to claim 10, wherein:
- said housing has a first end and an axially opposite second end;
- said second end of said housing is disposed adjacent to said cam means;
- said outer part of said piston comprises a tubular portion;
- said tubular portion of said outer part is disposed between said inner part of said piston and said first end of said housing;
- said tubular portion of said outer part is disposed to define an internal bore substantially concentric with the longitudinal axis;
- said door closer comprises a connecting body disposed in said housing adjacent to said first end of said housing; and
- at least a portion of said body is disposed to threadingly engage with said internal bore of said tubular portion of said outer part to substantially rigidly connect said inner and outer piston parts to one another.
- 12. The door closer according to claim 11, wherein:
- said piston is disposed to divide said housing into first and second chamber portions;
- said first chamber portion is disposed adjacent to said first end of said housing;
- each of said first and second chamber portions contains damping medium;
- said door closer comprises a flow path fluidly connecting said first and second chamber portions to one another;
- said inner part of said piston comprises a portion;
- said portion of said inner part of said piston is disposed adjacent to said pin;
- said flow path comprises a ring-shaped channel;
- said ring-shaped channel is disposed within said portion of said inner part of said piston;
- said ring-shaped channel extends around the longitudinal axis of said housing;
- said ring-shaped channel represents a first channel;
- said flow path comprises a second channel;
- said second channel is disposed within said outer part of said piston; and
- said second channel is disposed to fluidly connect said ring-shaped channel with said first chamber portion of said housing.
- 13. The door closer according to claim 12, wherein:
- said door closer comprises a valve disposed within said second channel;
- said valve is disposed to open said flow path during an opening of a door and to close said flow path during a closing of a door;
- said cam means comprises a shaft;
- said shaft has an axis of rotation defined substantially perpendicular to the longitudinal axis of said housing;
- said shaft is disposed and configured to rotate in a first direction during an opening movement of a door;
- said shaft is disposed and configured to rotate in a second direction during a closing movement of a door;
- said cam means comprises a plate;
- said plate is disposed within said housing;
- said plate is attached to said shaft to rotate with said shaft;
- said cam means comprises a first roller and a second roller;
- said first roller and said second roller are movable together in a first direction substantially parallel with the longitudinal axis of said housing;
- said first roller and said second roller are movable together in a second direction substantially parallel with the longitudinal axis of said housing;
- each of said first and second rollers are disposed in camming contact with said plate to operatively convert between rotary displacement of said plate and axial displacement of said first and second rollers;
- each of said first and second rollers are operatively connected to said member; and
- said energy storage means comprises at least one spring disposed in said housing.
Priority Claims (1)
Number |
Date |
Country |
Kind |
195 06 355.4 |
Feb 1995 |
DEX |
|
CONTINUING APPLICATION DATA
This application is a Continuation-in-Part of International Patent Application No. PCT/DE96/00095 filed on Jan. 24, 1996, which claims priority from Federal Republic of Germany Patent Application No. 195 06 355.4, filed on Feb. 23, 1995. Internation Patent Application No. PCT/DE96/00095 was pending as of the filing date of this application and designated the United States of America as a designated state.
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