Invention Grant
US09273664B2 Hydraulic control valve for a one-sided operating differential cylinder having five control edges
有权
用于具有五个控制边缘的单面操作差速器气缸的液压控制阀
- Patent Title: Hydraulic control valve for a one-sided operating differential cylinder having five control edges
- Patent Title (中): 用于具有五个控制边缘的单面操作差速器气缸的液压控制阀
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Application No.: US13030376Application Date: 2011-02-18
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Publication No.: US09273664B2Publication Date: 2016-03-01
- Inventor: Gerd Scheffel
- Applicant: Gerd Scheffel
- Applicant Address: US OH Cleveland
- Assignee: Parker Hannifin Corporation
- Current Assignee: Parker Hannifin Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Main IPC: F15B11/08
- IPC: F15B11/08 ; F03B15/00

Abstract:
A hydraulic control valve to control a double-acting working cylinder having a piston with a piston rod on one side, at least four external connections, and a device to feed the fluid forced from the small stroke space of the working cylinder into the large stroke space while the piston rod is moving out, and further for independent switching of the working cylinder from the work stroke to slow movement with a subsequent holding state to release pressure from the small stroke space, and wherein a connection of the small stroke space to the tank can be switched on. The control valve has five control edges, with two separate line paths formed to feed the fluid forced out of the small stroke space back with a back-feed control edge and a pressure-release control edge is formed to release pressure from the small stroke space to the tank.
Public/Granted literature
- US20120211101A1 HYDRAULIC CONTROL VALVE FOR A ONE-SIDED OPERATING DIFFERENTIAL CYLINDER HAVING FIVE CONTROL EDGES Public/Granted day:2012-08-23
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