Door closer, particularly for glass doors

• US 20120311817A1
• Filed: 09/06/2011
• Published: 12/13/2012
• Est. Priority Date: 09/06/2010
• Status: Active Grant

• Current Assignee: In & Tec S.R.L.
• Original Assignee: Dianora Gosio
• Inventors: Bacchetti, Luciano
• Granted Patent: US 8,443,487 B2
• Time in Patent Office: Days
• 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 (S) and are movable between an open door position and a closed door position. The door closer comprises a box-like body (10) and a pin (20) reciprocally rotatably coupled to rotate around a first axis (x) between the open door position and the closed door position. Closing means are provided (30) to automatically return the door, as well as a braking means (40) acting thereon to counteract their action. First and second cam elements (31, 41) unitary with the pin (20) and interposed between a first and second plunger elements (32, 42) are provided.

Claims

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

a box-like body (10) anchorable to one between the stationary support structure and the door and a pin (20) defining a first longitudinal axis (X) anchorable to the other between the stationary support structure (S) and the door, said pin (20) and said box-like body (10) being reciprocally rotatably coupled to rotate around said first axis (X) between the open door position and the closed door position;

closing means (30) for the automatic return of the door from the open to the closed position;

braking means (40) acting on said closing means (30) for counteracting the action thereof;

said closing means (30) comprising a first cam element (31) interacting with a first plunger element (32) movable within said box-like body (10) between a first compressed end position corresponding to the open door position and a first extended end position corresponding to the closed door position;

said braking means (40) comprising a second cam element (41) interacting with a second plunger element (42) movable within said box-like body (10) 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 second cam elements (31, 41) are unitary with said pin (20) in such a manner to unitary rotate therewith, and

wherein said pin (20) is interposed between said first and second plunger elements (32, 42).

2. Door closer according to claim 1, wherein said first and second plunger elements (32, 42) are both slidably movable along a second axis (Y) substantially perpendicular to said first axis (X), said first and second plunger elements (32, 42) being preferably slidably movable in a single operating chamber (50) defining said second axis (Y).

3. Door closer according to claim 1 or 2, wherein said first and second plunger elements (32, 42) are reciprocally opposite with respect to said pin (20).

4. Door closer according to one or more of the preceding claims, wherein said first plunger element (32) comprises at least one first pushing head (33, 33′

) interacting with at least one substantially first countershaped seat (34, 34′

) of said first cam element (31), said second plunger element (42) including at least one second pushing head (43) interacting with at least one second substantially countershaped seat (44) of said second cam element (41).

5. Door closer according to the preceding claim, wherein both said at least one first and second pushing heads (33, 33′

, 43) have a generally plate-like shape to define respective at least one first and second planes (π

′

, π

″

, π

′

″

) substantially perpendicular to said first axis (X), said at least one first and second planes (π

′

, π

″

, π

′

″

) being preferably reciprocally parallel.

6. Door closer according to claim 4 or 5, wherein said at least one first and second pushing heads (33, 33′

, 43) comprise respective at least one first and second flat front faces (35″

, 36″

, 45″

) substantially parallel each other and to said first longitudinal axis (X), said at least one first and second countershaped seats (34, 34′

, 44) comprising respective at least one first and second substantially flat contact surfaces (37″

, 38″

, 46″

) perpendicular each other and parallel to said first longitudinal axis (X), said at least one first and second front faces (35″

, 36″

, 45″

) being in contact engage with said at least one first and second contact surfaces (37″

, 38″

, 46″

).

7. Door closer according to the preceding claim, wherein said at least one first front face (35″

, 36″

) and at least one first contact surface (37″

, 38″

) 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 (45″

) and at least one second contact surface (46″

) being substantially perpendicular to each other in said closed door position and substantially parallel each other in said open door position.

8. Door closer according to one or more of the claims from 4 to 7, wherein said closing means (30) comprise first counteracting elastic means (39) acting on said first plunger element (32) to promote the reciprocal interaction of said at least one first pushing head (33, 33′

) and said at least one first countershaped seat (34, 34′

), said braking means (40) comprising second counteracting elastic means (47) acting on said second plunger element (41) to promote the reciprocal interaction of said at least one second pushing head (43) and said at least one second countershaped seat (44).

9. Door closer according to one or more of the preceding claims, wherein said operating chamber (50) comprises a working fluid, said first plunger element (32) comprising a substantially cylindrical first back portion (32′

) and a first front portion (32″

) including said at least one first pushing head (33, 33′

), said second plunger element (42) comprising a substantially cylindrical second back portion (42′

) and a second front portion (42″

) which include said at least one second pushing head (43), said first and second back portions (32′

, 42′

) being designed to separate said operating chamber (50) into a first, a second and a third adjacent variable volume compartments (51, 52, 53) in reciprocal fluidic communication.

10. Door closer according to the preceding claim, wherein said first and third variable volume compartments (51, 53) are designed to have in correspondence of said closed door position respectively the maximum and minimum volume and in correspondence of said open door position respectively the minimum and maximum volume, said first counteracting elastic means (39) being located in said first compartment (51), said second counteracting elastic means (47) being located in said third compartment (53) and both said first and second cam elements (31, 41) being located in said second compartment (52).

11. Door closer according to claim 9 or 10, wherein said operating chamber (50) comprises control means (60) for controlling the flow of the working fluid designed to allow the flow thereof from said first compartment (51) to said third compartment (53) through said second compartment (52) upon the opening of the door and to allow the backflow thereof from said third compartment (53) to said first compartment (51) through said second compartment (52) upon the closing of the door.

12. Door closer according to claim 11, wherein said control means (60) comprise a first hole (61) passing through said first plunger element (32) so as to put into fluidic communication said first compartment (51) and said second compartment (52) and a second hole (62) passing through said second plunger element (42) so as to put into fluidic communication said third compartment (53) and said second compartment (52), said control means (60) further comprising a first check valve (63) interacting with said first passing through hole (61) and a second check valve (64) interacting with said second passing through hole (62), said first and second check valves (63, 64) reciprocally cooperating to selectively open upon the opening of the door, thus allowing the flow of the working fluid from said first compartment (51) to said second compartment (52) through said first passing through hole (61) and from said second compartment (52) to said third compartment (53) through said second passing through hole (62), and to selectively close upon the closing of the door, thus preventing the backflow of the working fluid therethrough.

13. Door closer according to claim 12, wherein said control means (60) further comprise an hydraulic circuit (70) internal to said box-like body (10) to put into fluidic communication said third compartment (53) and said first compartment (51) through said second compartment (52) upon the closing of said first and second check valves (63, 64), thus allowing the backflow of the working fluid upon the closing of the door.

14. Door closer according to claim 13, wherein said hydraulic circuit (70) comprises an interspace (75) between said second plunger element (42) and said operating chamber (50) to put into fluidic communication said third variable volume compartment (53) and said second variable volume compartment (52), said hydraulic circuit (70) further including a channel (71) passing through said box-like body (10) having at least one inlet port (72) in fluidic communication with said second variable volume compartment (52) and at least one outlet port (73) in fluidic communication with said first variable volume compartment (51).

15. Door closer according to claim 14, wherein said channel (71) comprises a second outlet port (74), said first back portion (32″

) of said first plunger element (32) comprising a third passing through hole (327 slidable unitary therewith along said second longitudinal axis (Y), said second outlet port (74) and said third passing through hole (32″

′

) being susceptible to be reciprocally uncoupled when said first plunger element (32) is in proximity of the compressed end position and reciprocally coupled when said first plunger element (32) is in proximity of the extended end position to selectively put into fluidic communication said channel (71) with said first variable volume compartment (51), so as to impart a latch action to the door towards the closed position.