FOLDING LEAF GATE

• US 20090000197A1
• Filed: 09/03/2008
• Published: 01/01/2009
• Est. Priority Date: 02/21/2003
• Status: Active Grant

• Current Assignee: Cova Security Gates Limited
• Original Assignee: Cova Security Gates Limited
• Inventors: LONG, Roger George
• Granted Patent: US 7,942,185 B2
• Time in Patent Office: Days
• US Class Current: 49/107
• CPC Class Codes: E05D 15/26 for folding wings
• CPC Class Codes: E05D 15/264 for bi-fold wings
• CPC Class Codes: E05D 3/122 Gear hinges
• CPC Class Codes: E05F 1/1091 with a gas spring E05F1/1292 takes precedence
• CPC Class Codes: E05F 15/605 for folding wings
• CPC Class Codes: E05F 15/614 operated by meshing gear wheels, one of which being mounted at the wing pivot axis; operated by a motor acting directly on the wing pivot axis
• CPC Class Codes: E05F 15/627 operated by flexible elongated pulling elements, e.g. belts, chains or cables using flexible elongated push-pull mechanisms E05F15/619
• CPC Class Codes: E05F 17/00 Special devices for shifting a plurality of wings operated simultaneously for simultaneously moving a plurality of interconnected ventilating lamellae E06B7/086
• CPC Class Codes: E05Y 2201/62 Synchronisation of transmission members
• CPC Class Codes: E05Y 2201/646 continuous, e.g. closed loops
• CPC Class Codes: E05Y 2201/656 Chains
• CPC Class Codes: E05Y 2201/722 Racks
• CPC Class Codes: E05Y 2800/29 forming a unitary piece with another element
• CPC Class Codes: E05Y 2900/402 for cantilever gates

Abstract

A folding leaf gate comprising a post hung section hingedly attachable to a gate post and at least one leaf hung section hingedly connected in series with the post hung section by means of one or more section hinges, wherein the folding leaf gate additionally includes a rotating device associated with the or each leaf hung section and sharing a common axis of rotation with the or each section hinge and secured in a static relationship to a leaf hung section whereby rotation of the or each rotating device causes rotation of a leaf hung section about the or each section hinge, and one or more translating devices engaging the or each rotating devices, the one or more translating device being configured, when in use, to translate rotational motion of the post hung section about a gate post to rotation of the one or more rotating devices whereby simultaneously to open a gateway closed by the folding leaf gate and fold the folding leaf gate in two or more.

Claims

1. A folding leaf gate comprising a post hung section hingedly attachable to a gate post and one or more leaf hung sections hingedly attachable in series with the post hung section by means of one or more section hinges and an actuator for facilitating the opening and closing of the gate, the actuator comprising a rotary drive motor positioned close to the point of rotation of the post hung section about the gate post, characterised in that the actuator further includes a two part linkage mechanism comprising first and second parts, each part having first and second ends respectively, the first end of the first part being fixedly connected to the drive of the motor and rotatable therewith, and the second end of the first part being pivotally connected to a first end of the second part via a 360°

pivot, the second end of the second part being hingedly attached to the post hung section of the gate, the linkage mechanism being configured such that upon rotation of the drive motor, the first part of the linkage mechanism is rotated through an angle of between 240° and

300°

between first and second stop positions corresponding to the fully opened or fully closed position of the gate, the rotation causing pivotal movement of the second part of the linkage mechanism relative to said first port thereby to cause the gate sections to be rotated through 90°

.

2. A folding leaf gate according to claim 1, wherein the two part linkage mechanism moves from a configuration in which the two parts are substantially aligned when the gate is in a closed position to a configuration in which the two parts substantially overlap when the gate is in an open position.

3. A folding leaf gate according to claim 1, wherein the rotary drive motor and linkage mechanism are configured such that when the gate is in the closed configuration, the linkage mechanism subtends an angle of 30°

or less to the gate.

4. A folding leaf gate according to claim 1, wherein the rotary drive motor is mounted onto a surface of a gate post.

5. A folding leaf gate according to claim 1, in which the actuator is provided with a pair of rubber stops corresponding to the rotational positions of the first part when the gate is in a fully opened or fully closed position.

6. A folding leaf gate according to claim 5, wherein the stops are separated by an angle of between 240°

and 300°

.

7. A folding leaf gate according to claim 6, wherein the stops are separated by an angle of 270°

.

8. A folding leaf gate according to claim 1, wherein the motor is provided with a brake for holding the rotational position of the motor when the gate is in a fully opened or fully closed configuration.

9. A folding leaf gate according to claim 8, wherein the brake is an electromagnetic brake.

10. A folding leaf gate according to claim 1, which further includes one or more rotating devices, each rotating device being associated with any one of the one or more leaf hung sections respectively, each rotating device sharing a common axis of rotation with the section hinge associated with the leaf hung section with which that rotating device is also associated, each rotating device being secured in static relationship to its respective leaf hung section whereby rotation of any of the one or more rotating devices causes rotation of its respective leaf hung section about its associated section hinge;

the folding leaf gate further comprising one or more translating devices, each of the one or more translating devices being associated with one of the one or more leaf hung sections and its corresponding rotating device, the translating device being engagable at one end with its corresponding rotating device and anchored at its other end to a section once removed from the leaf hung section having the rotating device with which the translating device is associated or the gate post whereby in use the one or more translating devices translate the rotational movement of the post hung section about a gate post to rotation of the one or more rotating devices thereby to simultaneously to open a gateway closed by the folding leaf gate and to fold the folding leaf gate into two or more.

11. A folding leaf gate according to claim 10 wherein the leaf hung section is adjacent to the post hung section, the rotating device is a pinion and the translating device comprises a rack which rack engages the pinion such translational motion of the rack causes rotation of the pinion.

12. A folding leaf gate according to claim 11 additionally including a retaining device, for retaining the rack in engagement with the pinion, the retaining device comprising at least one cam roller surface whereby, in use, the cam roller surface provides a surface against which the rack may slide whilst being retained in engagement with the pinion.

13. A folding leaf gate according to claim 11 wherein the or each translating device additionally includes a rod, which, in use, is secured at a first rod end to the rack and at a second rod end to a gate post via a rod end bearing, the rack being in alignment with the longitudinal axis of the rod, the rod forming an acute angle with a plane which includes a rear surface of the post hung section, the apex of the acute angle lying at the intersection of the rack with the pinion, whereby, in use, as the rod and post hung section rotate about a gate post, the first rod end moves translationally with respect to the apex whereby to rotate the pinion and associated leaf hung section and to fold the folding leaf gate in two.

21. A folding leaf gate according to claim 1 including at least one rotating device comprising a leaf hung bevel gear and at least one translating device comprising a shaft including a shaft bevel gear engaging the leaf hung bevel gear at a right angle such that rotational motion of the shaft about its longitudinal axis causes rotation of the leaf hung bevel gear.

22. A folding leaf gate according to claim 21, wherein the rotation device associated with the gate post is a gate post bevel gear, secured in static relationship with the gate post, the gate post bevel gear sharing a common axis of rotation with a section hinge associated with the gate post, the shaft comprising an additional shaft bevel gear, the shaft bevel gear engaging the leaf hung bevel gear at a right angle and the additional shaft bevel gear engaging the gate post bevel gear at a right angle whereby, in use, rotation of the post hung section about a gate post rotates the additional shaft bevel gear thereby to rotate the shaft about its longitudinal axis and rotate the leaf hung bevel gear and counter-rotate the leaf hung section adjacent the post hung section about the section hinge to fold the gate in two.

23. A folding leaf gate according to claim 22 wherein the gate post bevel gear has a measured circumference twice that of the leaf hung bevel gear.

24. A folding leaf gate according to claim 21 wherein a or any first leaf hung bevel gear associated with a or any first leaf hung section twice or more removed from the post hung section is paired with a trailing bevel gear, each trailing bevel gear being secured in a static relationship to a preceding twice removed any section and being coaxial with a second leaf hung bevel gear associated with a second section sited one position closer to the post hung section, shafts comprising a shaft bevel gear and an additional shaft bevel gear, the shaft bevel gear engaging the said a or any first leaf hung bevel gear and the additional shaft bevel gear engaging the trailing bevel gear whereby, in use, when each second section rotates about a section hinge coaxial with each second leaf hung bevel gear, the shaft is caused to rotate about its longitudinal axis thereby to rotate the or any first leaf hung bevel gear and to counter-rotate the or any first leaf hung section about a section hinge coaxial with the or any first leaf hung bevel gear and to fold the gate.

25. A folding leaf gate according to claim 24 wherein the or any first leaf hung bevel gear has a measured circumference identical to that of the railing bevel gear.

26. A folding leaf gate according to claim 1 additionally including a guide wheel mounted on an edge of the gate extending perpendicularly from a longitudinal axis of the gate post in a position at or near to the edge of the leaf hung section which guide wheel, when the gate is in its closed position, is distal to the post hung section, which, in use, is self locatable in a ground plate guide when the gate is in its closed position.

27. A folding leaf gate according to claim 1 wherein the leaf gate comprises an even number of sections.

28. A folding leaf gate according to claim 27 wherein the number of sections is two.

29. A folding leaf gate according to claim 27 wherein the number of sections is four.

30. A drive mechanism for a swing gate according to claim 1, comprising a rotary drive motor positioned close to the point of rotation of the post hung section about the gate post and a two part linkage mechanism comprising first and second parts, each part having first and second ends respectively, the first end of the first part being fixedly connected to the drive of the motor and rotatable therewith, and the second end of the first part being pivotally connected to a first end of the second part via a 360°

pivot, the second end of the second part being hingedly attached to the post hung section of the gate, the linkage mechanism being configured such that upon rotation of the drive motor, the first part of the linkage mechanism is rotated through an angle of between 240° and

300°

between first and second stop positions to the fully opened or fully dosed position of the gate, the rotation causing pivotal movement of the second part relative to said first part thereby cause the gate sections to be rotated through 90°

.

31. A drive mechanism according to claim 30, wherein the two part linkage mechanism moves from a configuration in which the two parts are substantially aligned when the gate is in a closed position to a configuration in which the two parts substantially overlap when the gate is in an open position.

32. A drive mechanism according to claim 30, wherein the rotary drive motor and linkage mechanism are configured such that when the gate is in the closed configuration, the linkage mechanism subtends an angle of 30°

or less to the gate.

33. A drive mechanism for a swing gate according to claim 30 wherein the motor is provided with a brake for holding the rotational position of the motor when the gate is in a fully open or fully closed configuration.

34. A drive mechanism for a swing gate according to claim 33 wherein the brake is an electromagnetic brake.

35. A drive mechanism for a swing gate, according to claim 30 wherein the motor is provided with a pair of rubber stops corresponding to rotational positions of the motor when the gate is in a fully opened or fully closed configuration.

36. A drive mechanism as claimed in claim 35 wherein the stops are separated by an angle of between 240°

and 300°

through which the first part of the linkage mechanism is able to rotate.

37. A drive mechanism as claimed in claim 36 wherein the stops are separated by an angle of 270°

.

14-20. -20. (canceled)