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Hydraulic pump with secondary safety check valve

A check valve, secondary technology, applied in the field of hydraulic pumps, can solve the problems of unresolved main check valve leakage or check valve failure, catastrophic failure, property loss, etc.

Active Publication Date: 2020-01-17
SNAP ON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently no technical solutions to address leakage through the main check valve or failure of the check valve, which could lead to catastrophic failure resulting in property damage and / or personal injury or death

Method used

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  • Hydraulic pump with secondary safety check valve
  • Hydraulic pump with secondary safety check valve
  • Hydraulic pump with secondary safety check valve

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Embodiment Construction

[0011] While the invention is susceptible to many different forms of embodiment, preferred embodiments of the invention are shown in the drawings and will be described in detail herein, it being understood that this disclosure will It is considered to be an illustration of the principles of the invention and is not intended to limit the invention in its broad aspects to the embodiments shown. As used herein, the term "present invention" is not intended to limit the scope of the claimed invention, but is a term used to discuss exemplary embodiments of the invention for purposes of explanation only.

[0012] The present invention generally relates to a hydraulic power unit for a floor jack that includes a secondary safety check valve (SSCV) to provide additional leakage protection in support of the primary check valve. SSCV adopts check ball valve. By using ball check valves, the SSCV also acts as a safety measure against loss of load carrying capacity of the unit in the event ...

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PUM

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Abstract

A hydraulic power unit for a floor jack that includes a secondary safety check valve (SSCV) to provide additional leakdown protection, backing up the main check valve. The SSCV acts as a safety measure to prevent the unit from losing load bearing capabilities if the main check valve fails. In addition, the SSCV acts as a means to prevent debris from entering the main check valve, thereby reducingthe chance for failure due to an obstruction.

Description

technical field [0001] This application generally relates to horizontal jacks. More specifically, the present invention relates to a hydraulic pump for a horizontal jack having a secondary safety check valve. Background technique [0002] Lift the vehicle off the ground using a floor jack in a repair shop. The operator positions the floor jack under the lift point and raises the vehicle at that point. Horizontal jacks can be powered by manual or automatic means and have become important to the automotive repair industry. [0003] Several tons of hydraulic pressure can be generated in the hydraulic power unit of the horizontal jack. Pressure leaks reduce the efficiency of the power pack and can cause the jack to fail. The power unit includes a main check valve between the hydraulic pump and the lift piston. When fluid is being pumped, the main check valve opens, sending pressurized fluid into the cylinder containing the lift piston. The master check valve should then cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F5/04F15B20/00F15B13/01F15B13/02
CPCB66F5/04F15B20/005F15B13/01F15B13/027B66F3/25B66F3/42B66F2700/05F15B15/18F15B15/202F15B20/008F15B2211/8636
Inventor 本杰明·T·舒尔茨乔纳森·I·安徒生丹尼尔·埃格特
Owner SNAP ON INC