Door closer, particularly for glass doors

• US 8,677,560 B2
• Filed: 04/18/2013
• Issued: 03/25/2014
• Est. Priority Date: 09/06/2010
• Status: Active Grant

• Current Assignee: In & Tec S.R.L.
• Original Assignee: In & Tec S.R.L.
• Inventors: Bacchetti, Luciano
• Primary Examiner(s): MAH, CHUCK Y
• Application Number:
  US13/865,397
• Publication Number:
  US 20130227814A1
• Time in Patent Office: 341 Days
• Field of Search: 16/50, 16/54, 16/68, 16/58, 16/71, 16/78, 16/80, 16/49, 16/51, 163/18, 163/19, 162/80, 162/81, 163/10, 163/16, 163/17, 163/78, 162/52, 493/39, 493/34, 493/40, 493/23, 493/24, 493/44, 491/37, 491/38
• US Class Current: 16/51
• CPC Class Codes: E05D 5/0246 for attachment to glass panels
• CPC Class Codes: E05D 7/081 the pivot axis of the wing being situated near one edge of the wing, especially at the top and bottom, e.g. trunnions
• CPC Class Codes: E05F 3/04 with liquid piston brakes rotary type E05F3/14
• CPC Class Codes: E05F 3/104 with cam-and-slide transmission between driving shaft and piston within the closer housing
• CPC Class Codes: E05F 3/12 Special devices controlling the circulation of the liquid, e.g. valve arrangement E05F3/223 takes precedence; valves per se F16K
• CPC Class Codes: E05F 3/20 in hinges
• CPC Class Codes: E05F 3/226 with means to adjust the closed position of the wing
• CPC Class Codes: E05Y 2201/638 Cams; Ramps
• CPC Class Codes: E05Y 2600/46 in or on the wing
• CPC Class Codes: E05Y 2800/22 of not identical elements of the same category, e.g. combinations of not identical springs
• CPC Class Codes: E05Y 2900/132 Doors

Abstract

A door closer for doors, particularly glass doors, which are supported by a stationary support structure and are movable between an open door position and a closed door position. The door closer comprises a box-shaped body and a pin reciprocally coupled to rotate around a first axis between the open door position and the closed door position. A closing mechanism causes the door to return automatically and a braking mechanism counteracts the action of the closing mechanism. First and second cam elements are unitary with the pin and interposed between a first and second plunger elements acting thereon.

Claims

1. A door closer for a door which is supportable by a stationary support structure, the door being movable between an open door position and a closed door position, the door closer comprising:

a box-shaped body anchorable to one of the stationary support structure or the door;

a pin defining a first longitudinal axis, the pin being anchorable to the other one of the stationary support structure or the door, said pin and said box-shaped body being reciprocally and rotatably coupled to rotate around said first longitudinal axis between the open door position and the closed door position;

a closing mechanism for automatic return of the door from the open to the closed position;

a braking mechanism acting on said closing mechanism configured to counteract an action thereof;

said closing mechanism comprising a first cam element interacting with a first plunger element movable within said box-shaped body between a first compressed end position corresponding to the open door position and a first extended end position corresponding to the closed door position; and

said braking mechanism comprising a second cam element interacting with a second plunger element movable within said box-shaped body between a second compressed end position, corresponding to the closed door position and a second extended end position, corresponding to the open door position;

wherein both said first and said second cam elements are unitary with said pin,

wherein said first plunger element comprises at least one first pushing head interacting with at least one substantially first countershaped seat of said first cam element, said second plunger element including at least one second pushing head interacting with at least one second substantially countershaped seat of said second cam element,

wherein said at least one first and second pushing heads comprise respectively at least one first and second front faces, said at least one first and second countershaped seats comprising respective at least one first and second contact surfaces, said at least one first and second front faces being in contact engagement with said at least one first and second contact surfaces,

wherein said pin is interposed between said first and second plunger elements, and

wherein said first and second plunger elements are both slidably movable in an operating chamber internal to the box-shaped body along a second axis substantially perpendicular to said first axis, both said at least one first and said second pushing heads being shaped to define respectively at least one first and second planes substantially perpendicular to said first axis.

2. The door closer according to claim 1, wherein said first and said second countershaped seats are defined between walls extending perpendicularly from said pin, wherein said first pushing head comprises at least one plate-shaped member disposed to nest between a first pair of said walls, and wherein said second pushing head comprises a second plate-shaped member disposed to nest between a second pair of said walls.

3. The door closer according to claim 2, wherein said first countershaped seat is defined between said first pair of said walls, said second countershaped seat being defined between said second pair of said walls.

4. The door closer according to claim 2, wherein said first pushing head comprises a first plate-shaped member and a second plate-shaped member disposed to nest respectively between an upper pair and a lower pair of said walls, said second countershaped seat being defined between said upper pair and said lower pair of said walls.

5. The door closer according to claim 1, wherein said first and second plunger elements are mutually opposite with respect to said pin.

6. The door closer according to claim 1, wherein said at least one first and second planes are mutually parallel.

7. The door closer according to claim 1, wherein said at least one first front face and said at least one first contact surface are substantially parallel to each other in said closed door position and substantially perpendicular to each other in said open door position, said at least one second front face and said at least one second contact surface being substantially perpendicular to each other in said closed door position and substantially parallel to each other in said open door position.

8. The door closer according to claim 1, wherein said closing mechanism comprises a first counteracting elastic element acting on said first plunger element to promote a mutual interaction of said at least one first pushing head and said at least one first countershaped seat, said braking mechanism comprising a second counteracting elastic element acting on said second plunger element to promote a mutual interaction of said at least one second pushing head and said at least one second countershaped seat.

9. The door closer according to claim 1, wherein the box-shaped body is anchorable ro the door, and wherein the pin is anchorable to the stationary support structure.

10. The door closer according to claim 1, further comprising a plate through which the box-shaped body is installed on a floor.

11. A door closer for a door which is supportable by a stationary support structure, the door being movable between an open door position and a closed door position, the door closer comprising:

a box-shaped body anchorable to one of the stationary support structure or the door;

a pin defining a first longitudinal axis, the pin being anchorable to the other one of the stationary support structure or the door, said pin and said box-shaped body being reciprocally and rotatably coupled to rotate around said first axis between the open door position and the closed door position;

a closing mechanism for automatic return of the door from the open to the closed position;

a braking mechanism acting on said closing mechanism configured to counteract an action thereof, and

said closing mechanism comprising a first cam element interacting with a first plunger element movable within said box-shaped body between a first compressed end position corresponding to the open door position and a first extended end position corresponding to the closed door position; and

said braking mechanism comprising a second cam element interacting with a second plunger element movable within said box-shaped body between a second compressed end position, corresponding to the closed door position, and a second extended end position, corresponding to the open door position;

wherein both said first and said second cam elements are unitary with said pin,

wherein said first plunger element comprises at least one first pushing head interacting with at least one substantially first countershaped seat of said first cam element, said second plunger element including at least one second pushing head interacting with at least one second substantially countershaped seat of said second cam element,

wherein said pin is interposed between said first and second plunger elements, said first and second plunger elements being both slidably movable in a operating chamber internal to the box-shaped body along a second axis substantially perpendicular to said first axis,

wherein said operating chamber comprises a working fluid, said first plunger element comprising a substantially cylindrical first back portion and a first front portion including said at least one first pushing head, said second plunger element comprising a substantially cylindrical second back portion and a second front portion which include said at least one second pushing head,

wherein said operating chamber is separated into a first, a second and a third adjacent variable volume compartments in reciprocal fluidic communication, the first variable volume compartment including said first plunger element, the third variable volume compartment including said second plunger element, the second variable volume compartment including said pin, and

wherein the door closer further comprises a flow control system for controlling the flow of the working fluid designed to allow the flow thereof from said first compartment to said third compartment through said second compartment upon the opening of the door and to allow a backflow thereof from said third compartment to said first compartment through said second compartment upon the closing of the door.

12. The door closer according to claim 11, wherein said flow control system includes a first hole passing through said first plunger element to put into fluidic communication said first compartment and said second compartment and a second hole passing through said second plunger element to put into fluidic communication said third compartment and said second compartment, wherein said flow control system further comprises an hydraulic circuit to put into fluidic communication said third compartment and said first compartment through said second compartment.

13. The door closer according to claim 12, wherein said second plunger element includes a check valve interacting with said second hole to selectively open upon the opening of the door for allowing a flow of the working fluid from said first compartment to said second compartment through said first hole and from said second compartment to said third compartment through said second hole, and to selectively close upon the closing of the door for preventing a backflow of the working fluid therethrough, said hydraulic circuit allowing the backflow of the working fluid upon the closing of the door.

14. The door closer according to claim 13, wherein said hydraulic circuit comprises an interspace between said second plunger element and said operating chamber to put into fluidic communication said third variable volume compartment and said second variable volume compartment, said hydraulic circuit further including a channel passing through said box shaped body having at least one inlet port in fluidic communication with said second variable volume compartment and at least one outlet port in fluidic communication with said first variable volume compartment.

15. The door closer according to claim 14, wherein said at least one outlet port comprises a first outlet port and a second outlet port, said first outlet port being in continuous fluidic communication with said second variable volume compartment and said second outlet port being in intermittent fluidic communication with said second variable volume compartment, said intermittent fluidic communication being provided by a third pass-through hole defined on said first plunger element such that a sliding of said first plunger element causes an intermittent contact between said third pass-through hole and said second outlet port.

16. The door closer according to claim 15, further comprising an obstruction member configured to obstruct a passing section in said at least one outlet port, thereby regulating flow of said working fluid therethrough.

17. The door closer according to claim 16, wherein said obstruction member comprises a screw.

18. The door closer according to claim 11, wherein the box-shaped body is anchorable to the door, and wherein the pin is anchorable to the stationary support structure.

19. The door closer according to claim 11, further comprising a plate through which the box-shaped body is installed on a floor.