# US 8,782,953 B2 · Door closing device

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- Number: US 8,782,953 B2
- Document ID: US8782953B2
- Status: Granted
- Kind: B2
- Application number: 13/696,777
- Filed: 2011-05-11
- Published: 2013-02-28
- Granted: 2014-07-22
- Earliest claimed: 2010-05-11
- Assignees: Industria Casearia Silvio Belladelli S.R.L.
- Applicants: Claudio Bongiovanni
- Inventors: Claudio Bongiovanni
- Web page: https://patentgrep.com/patent/US8782953B2

## CPC

- E05F 3/20: in hinges
- E05F 1/1223: {with a compression or traction spring}
- E05F 3/12: Special devices controlling the circulation of the liquid, e.g. valve arrangement ({E05F3/223 takes precedence}; valves per se F16K)
- E05Y 2201/20: Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
- E05Y 2201/234: direction dependent
- E05Y 2201/458: Valves
- E05Y 2201/604: Transmission members
- E05Y 2201/638: Cams; Ramps
- E05Y 2201/688: Rollers
- E05Y 2900/132: Doors
- E05Y 2900/40: for gates
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A door closing device (10) for an automatic closing of a door leaf (B) coupled with a floor and/or a doorpost (S) so as to swing. The door closing device (10) comprises a fixed unit (12) that is fixed on the floor and/or the doorpost (S), a translating unit (14) and a rotating unit (16) on which the door leaf (B) is fixed. The coupling of the three units (12, 14, 16) and the presence of spring (38) are such that, when the rotating unit (16) rotates in a first sense of rotation, the translating unit (14) is caused to translate in a direction and such that, when the translating unit (14) translates in an opposite direction, the rotating unit (16) is caused to rotate in an opposite sense of rotation.

## Claims

### Claim 1

A door closing device (10) for an automatic closing of a door leaf (B) coupled with a floor and a doorpost (S) so as to swing, characterized in that the door closing device comprises:
a fixed unit (12) that is fixed on the floor and the doorpost (S);
a translating unit (14) that is coupled with the fixed unit (12) so as to translate and comprises a first spring (38) and at least a wheel (44) connected with the translating unit so as to rotate, the axis of rotation of said wheel (44) being perpendicular to the direction of translation of the translating unit (14);
a rotating unit (16) on which the door leaf (B) is fixed and comprises a fixed element (60) that is integral with the rotating unit, and at least a body (51) having an inclined surface (52) in respect to the direction of translation of the translating unit (14); said rotating unit (16) is coupled with the translating unit (14) so that the wheel (44) can run along the inclined surface (52) of the body (51) and on rotating in a first sense of rotation the rotating unit (16) the running of the wheel (44) causes a translation of the translating unit (14) and a compression of the first spring (38) against the fixed element (60); an expansion of said first spring (38) causes a reverse rotation in respect to the first sense of rotation of the rotating unit (16) and door leaf fixed thereon;
wherein the rotating unit (16) comprises a first cam (54) having an inclined surface and fixed on the body (51), a through-hole (58, 59) being obtained in said body (51), and wherein the translating unit (14) comprises a pin (30) which passes through the through-hole (58, 59) and with which the wheel (44) is connected so as to rotate; a second cam (40) having an inclined surface is fixed on said pin (30), the direction of inclination of said second cam being the same as the one of the first cam (54), so that the inclined surface of the first cam (54) can beat against the inclined surface of the second cam (40);
wherein a hollow cylindrical structure (20), closed on the upper and lower parts, is fixed on the rotating unit (16), in which cylindrical structure (20) the translating unit (14) can translate and with which the fixed unit (12) is coupled so as to rotate, and a translating piston (46) is arranged in said cylindrical structure (20) so that the inner volume of the cylindrical structure (20) is divided into a lower chamber (66) and an upper chamber (68) for the containment of a fluid; at least a duct (72, 74, 76, 78, 84, 86) is obtained in said piston or cylindrical structure (20) for the exchange of fluid between the lower chamber (66) and the upper chamber (68); and said piston (46) is coupled with said translating unit (14) so that a translation of the translating unit (14) causes a corresponding translation of the piston (46); and
wherein on the upper part, the piston (46) is connected through a second spring (48) with the upper end of the cylindrical structure (20) and on the lower part, the piston (46) beats against the upper end of the pin (30).

### Claim 2 (depends on 1)

The door closing device (10) according to claim 1, wherein the first spring (38), is wound up on the pin (30), an end of said spring (38) being fixed on said pin (30), the opposite end of said spring (38) being beaten against the fixed element (60).

### Claim 3 (depends on 2)

The door closing device (10) according to claim 2, wherein the fixed unit (12) comprises a shaft (18) in which at least a first vertical seat (26) is obtained and wherein the pin (30) is fixed under a cylindrical body (31) in which a blind hole (33) is obtained; at least a second seat (34) is obtained in the surface forming said blind hole (33); the shaft (18) is received, at least partially, in the blind hole (33) so that the at least a first seat (26) is arranged so as to correspond with the at least a second seat (34) and at least a ball (28) is received in said first seat (26) and in said at least a second seat (34), said seats corresponding with each other, so that the cylindrical body (31) can translate and can not rotate in respect to said shaft (18).

### Claim 4 (depends on 1)

The door closing device (10) according to claim 1, wherein the at least a duct (72, 74, 76, 78, 84, 86) for the exchange of fluid between the lower chamber (66) and the upper chamber (68) comprises an adjustable valve (80, 82) to vary the flow of fluid between the lower chamber (66) and the upper chamber (68).

### Claim 5 (depends on 4)

The door closing device (10) according to claim 4, wherein at least a cross duct (84, 86) is obtained in the piston (46) and comprises a nonreturn valve so as to allow the passage of fluid only from the lower chamber (66) to the upper chamber (68), and wherein at least a vertical duct (72, 76) is obtained in the cylindrical structure (20) for the passage of fluid from the upper chamber (68) to the lower chamber (66), said at least an adjustable valve (80, 82) being arranged in said at least a vertical duct (72, 76).

### Claim 6 (depends on 4)

The door closing device (10) according to claim 4, wherein a first vertical duct (72) and a second vertical duct (76) are obtained in the cylindrical structure (20) for the passage of fluid from the upper chamber (68) to the lower chamber (66), the first vertical duct (72) being connected through a first horizontal duct (74) with the lower chamber (66), the second vertical duct (76) being connected through a second horizontal duct (78) with the lower chamber (66), the first horizontal duct (74) being obtained in the cylindrical structure (20) at a lower height than the second horizontal duct (78) obtained in the cylindrical structure (20).

### Claim 7

A door closing device (10) for an automatic closing of a door leaf (B) coupled with a floor or a doorpost (S) so as to swing, characterized in that door closing device comprises:
a fixed unit (12) that is fixed on the floor or the doorpost (S);
a translating unit (14) that is coupled with the fixed unit (12) so as to translate and comprises a first spring (38) and at least a wheel (44) connected with the translating unit so as to rotate, the axis of rotation of said wheel (44) being perpendicular to the direction of translation of the translating unit (14);
a rotating unit (16) on which the door leaf (B) is fixed and comprises a fixed element (60) that is integral with the rotating unit, and at least a body (51) having an inclined surface (52) in respect to the direction of translation of the translating unit (14); said rotating unit (16) is coupled with the translating unit (14) so that the wheel (44) can run along the inclined surface (52) of the body (51) and on rotating in a first sense of rotation the rotating unit (16) the running of the wheel (44) causes a translation of the translating unit (14) and a compression of the first spring (38) against the fixed element (60); an expansion of said first spring (38) causes a reverse rotation in respect to the first sense of rotation of the rotating unit (16) and door leaf fixed thereon;
wherein the rotating unit (16) comprises a first cam (54) having an inclined surface and fixed on the body (51), a through-hole (58, 59) being obtained in said body (51), and wherein the translating unit (14) comprises a pin (30) which passes through the through-hole (58, 59) and with which the wheel (44) is connected so as to rotate; a second cam (40) having an inclined surface is fixed on said pin (30), the direction of inclination of said second cam being the same as the one of the first cam (54), so that the inclined surface of the first cam (54) can beat against the inclined surface of the second cam (40);
wherein a hollow cylindrical structure (20), closed on the upper and lower parts, is fixed on the rotating unit (16), in which cylindrical structure (20) the translating unit (14) can translate and with which the fixed unit (12) is coupled so as to rotate, and a translating piston (46) is arranged in said cylindrical structure (20) so that the inner volume of the cylindrical structure (20) is divided into a lower chamber (66) and an upper chamber (68) for the containment of a fluid; at least a duct (72, 74, 76, 78, 84, 86) is obtained in said piston or cylindrical structure (20) for the exchange of fluid between the lower chamber (66) and the upper chamber (68); and said piston (46) is coupled with said translating unit (14) so that a translation of the translating unit (14) causes a corresponding translation of the piston (46); and
wherein on the upper part, the piston (46) is connected through a second spring (48) with the upper end of the cylindrical structure (20) and on the lower part, the piston (46) beats against the upper end of the pin (30).