Crowd gate for milking parlor holding areas
阅读：810发布：2020-10-12
专利汇可以提供Crowd gate for milking parlor holding areas专利检索，专利查询，专利分析的服务。并且A carriage mounted, horizontally pivoted, crowd gate for a milking parlor holding area in which cattle are admitted through an entry end of the holding area which is opposite the exit to the milking parlor. An overhead cable which is connected to the top of the gate for moving the gate from end to end of the holding area carries a lifting cable which is secured to the drive cable a short distance from the gate toward the entry end, and which is secured to the bottom of the gate. By blocking the carriage while continuing to operate the drive cable toward the entry end the lifting cable is pulled to swing the gate up on its pivots, after which a lug on the cable strikes a limit switch to stop the gate drive. Opposite movement of the drive cable slacks the lifting cable so the gate returns to vertical position.，下面是Crowd gate for milking parlor holding areas专利的具体信息内容。
1. Crowd gate means for a cattle holding area which has an entry at one end and an exit to a milking parlor at the opposite end, said crowd gate means comprising, in combination: parallel overhead tracks extending from end to end of the holding area; carriages supported on said tracks, said carriages having brackets; a gate pivotally suspended on said brackets on a horizontal axis, said gate being substantially the width of the holding area; drive means including an overhead cable for moving said gate from end to end of the holding area and a reversible electric motor drivingly connected to the overhead cable; an electric control circuit including first switch means having first open contacts, and means for closing said first open contacts to cause the motor to drive the gate toward the entry end of the holding area; connecting cable means which has one end connected to the overhead cable between the gate and the entry end of the holding area, the other end of said connecting cable means being connected toward the bottom of the gate; blocking means for blocking movement of the carriages toward the entry end, said blocking means being spaced from the entry end by a distance which is slightly greater than the distance from the pivot axis to the bottom of the gate, whereby when movement of the carriages is blocked the overhead cable continues to move and pulls the connecting cable to pivot the gate upwardly toward the entry end; means for stopping the drive of the overhead cable when the leading end of the lifted gate is near the entry end of the holding area; and second switch means in the control circuit having second open contacts, and means for closing said second open contacts to cause the motor to drive the overhead cable for moving the gate toward the exit end of the holding area, initial movement of the overhead cable toward said exit end releasing the pull on the connecting cable means so the gate returns to an upright position.
2. The combination of claim 1 in which the carriage brackets have transverse webs with holes through which the overhead cable means runs freely, the connecting cable means is connected to the overhead cable means by connectors which are larger than said holes, the overhead cable means is connected to the gate only by the connecting cable means through which the overhead cable means moves the gate toward the entry end of the holding area, and the connectors contact said webs to move the gate toward the exit end of the holding area.
3. The combination of claim 1 in which the means to stop the drive of the overhead cable includes a normally closed switch iN series with the open contacts of said first switch means, and switch control means for actuating said normally closed switch when the leading end of the lifted gate is immediately adjacent the entry end of the holding area.
4. The combination of claim 3 in which the normally closed switch is a limit switch provided with a mechanical actuator and the switch control means is on a movable part of the crowd gate means where it contacts said mechanical actuator.
5. The combination of claim 4 in which the mechanical actuator is immediately adjacent the overhead cable, and the switch control means is a button on the cable.
6. The combination of claim 3 in which the means for closing the first open contacts includes a manual actuator.
7. The combination of claim 6 in which the means for closing the second open contacts includes a manual actuator.
8. The combination of claim 7 in which the first and second switch means comprises a three position manual toggle switch having a center position in which the contacts of both said manual switch means are open, a first off-center position in which the open contacts of the first switch means are closed, and a second off-center position in which the open contacts of the second switch means are closed.
9. The combination of claim 8 in which the manual toggle switch locks in the first off-center position and is spring loaded from the second off-center position.
10. The combination of claim 1 in which the means for closing the first open contacts includes a manual actuator.
11. The combination of claim 10 in which the means for closing the second open contacts includes a manual actuator.
12. The combination of claim 11 in which the first and second switch means comprises a three position manual toggle switch having a center position in which the contacts of both said manual switch means are open, a first off-center position in which the open contacts of the first switch means are closed, and a second off-center position in which the open contacts of the second switch means are closed.
13. The combination of claim 12 in which the manual toggle switch locks in the first off-center position and is spring loaded from the second off-center position.
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