Hydraulic pressure relief tool

• US 5,623,959 A
• Filed: 06/07/1995
• Issued: 04/29/1997
• Est. Priority Date: 06/07/1995
• Status: Expired due to Fees

• Current Assignee: Kent G. Granmoe
• Original Assignee: Kent G. Granmoe
• Inventors: Granmoe, Kent G.
• Primary Examiner(s): Walton, George L
• Application Number:
  US08/479,193
• Time in Patent Office: 692 Days
• Field of Search: 137/321, 137/322, 137/614, 137/614.04, 137/614.05, 137/614.19, 251/145, 251/149.6, 81/488
• US Class Current: 137/322
• CPC Class Codes: B25B 13/48 for special purposes
• CPC Class Codes: B25B 27/24 mounting or demounting valves for tyre valves B60C25/18
• CPC Class Codes: Y10T 137/6137 Longitudinal movement of valve
• CPC Class Codes: Y10T 137/87925 Separable flow path section, valve or closure in each
• CPC Class Codes: Y10T 137/87957 Valves actuate each other

Abstract

A hydraulic pressure relief tool including a quick coupler component, either male or female, which has been modified by removing the valve and substituting a screw threaded member threaded in the quick coupler component oriented in the same position as the removed valve. This enables the screw threaded member to engage and open the valve in the quick coupler component connected with the hose when the tool is connected thereto to relieve hydraulic pressure in the hose. The screw threaded member is provided with a T-handle for ease of rotation thereof.

Claims

1. A hydraulic pressure relief tool for relieving hydraulic pressure in a hose supplying hydraulic pressure to a pressure operated unit and having a valved quick coupler component thereon which retains residual hydraulic pressure in said hose when the quick coupler component on the hose is separated from another valved quick coupler component connected with a source of hydraulic pressure, said tool comprising a hollow body duplicative of the valved quick coupler component on the hose with the valve removed, said hollow body being coupled to the quick coupler component on the hose, a screw threaded member threadedly mounted in said hollow body with an inner end of the screw threaded member engaging the valve on the quick coupler component on the hose, a handle on said screw threaded member externally of the body to rotate the screw threaded member to move it longitudinally against the valve in the quick coupler component on the hose to move the valve in the quick coupler component on the hose to open position to relieve hydraulic pressure in the hose thereby enabling the quick coupler component on the hose to be connected to a quick coupler component connected to a source of hydraulic pressure without having to open the valve in the quick coupler component on the hose against residual hydraulic pressure in said hose, said body including a drain opening for discharge of hydraulic fluid released from the hose.

2. The tool as defined in claim 1 together with a tube connected to said drain opening and extending laterally from the body for directing discharged hydraulic fluid away from a person using the tool and enabling collection of the hydraulic fluid in a receptacle.

4. The method as defined in claim 1 together with the step of directing the released hydraulic fluid away from a person using the tool and enabling the released hydraulic fluid to be collected.

6. The combination as defined in claim 1 wherein said tool body includes a drain opening for discharge of hydraulic fluid released from the hose.

7. The combination as defined in claim 1 together with a tube inserted into said drain opening and extending laterally from the body for directing discharged hydraulic fluid away from a person using the tool and enabling collection of the hydraulic fluid in a receptacle.

8. The combination as defined in claim 7, wherein the valve in the quick coupler components on the hose segments is a metal ball valve spring biased to closed position against a valve seat, said screw threaded member having a diameter less than the valve seat and ball valve for moving the ball valve to open position.

9. The combination as defined in claim 1 wherein said quick coupler on the hose segment in communication with a hydraulically powered unit and said body include coacting, releasable latch means for separably connecting the tool to the quick coupler component on the hose segment.

3. The method of releasing hydraulic pressure in a hose communicated with hydraulically powered equipment and provided with a quick coupler component having a spring biased closure valve on the free end thereof for retaining hydraulic pressure in the hose when the hose is disconnected from a source of hydraulic pressure consisting of the steps of connecting a duplicative quick coupler component modified by removing the spring biased closure valve to the quick coupler component on the hose in which the modified quick coupler component has its spring biased closure valve replaced by a longitudinally movable screw threaded member aligned with the valve on the quick coupler component on the hose and screw threading the longitudinally movable member inwardly to engage the valve on the quick coupler on the hose thereby moving the valve to open position to release hydraulic pressure in the hose.

5. In combination with a pressurized hydraulic hose having valved quick coupler components therein which enables the pressurized hose to be separated into two segments, one of the hose segments being in communication with a source of pressurized hydraulic fluid, the other hose segment being in communication with a hydraulically powered unit, said quick coupler components retaining hydraulic pressure in the hose segments when the quick coupler components on the hose are separated from each other, a tool for relieving hydraulic pressure from said hose segment connected with a hydraulically powered unit, said tool comprising a hollow body duplicative of the valved quick coupler component on the hose segment connected with a source of pressurized hydraulic fluid with the valve removed, a screw threaded member threadedly mounted in said body with an inner end of the screw threaded member being located to engage the valve on the quick coupler component on the hose segment in communication with a hydraulically powered unit when the tool is connected thereto, a handle on said screw threaded member externally of the body to rotate the screw threaded member to move it longitudinally against the valve in the quick coupler component on the hose segment to which the tool is connected to move the valve to open position to relieve hydraulic pressure in that hose segment.