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Vehicle’s hydraulic flow unloading at suction port of hydraulic Pump with external unloader

IP.com Disclosure Number: IPCOM000234110D
Publication Date: 2014-Jan-13
Document File: 2 page(s) / 43K

Publishing Venue

The IP.com Prior Art Database

Abstract

Hydraulic pump available in market don’t have inbuilt unloader. This disclosure is related to unload the pump flow to inlet of the pump with the help of unloaded block, drain Tube and Inlet manifold. Pump has two different sections with different oil delivery rate. The main hydraulic pump (P1) is a fixed displacement gear-type pump. The auxiliary pump (P2) is a smaller fixed displacement pump that is driven from the rear of the main hydraulic pump . An unloading valve housing for the auxiliary pump is located beside the pump units. The entire pump assembly is mounted on the rear of the transmission and is driven at engine speed by the transmission input shaft.

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Page 01 of 2

Title: Vehicle's hydraulic flow Unloading at Suction port of hydraulic Pump with external unloader

Abstract:

Hydraulic pump available in market don't have inbuilt unloader. This disclosure is related to unload the pump flow to inlet of the pump with the help of unloaded block, drain Tube and Inlet manifold.

Pump has two different sections with different oil delivery rate. The main hydraulic pump (P1) is a fixed displacement gear-type pump. The auxiliary pump (P2) is a smaller fixed displacement pump that is driven from the rear of the main hydraulic pump . An unloading valve housing for the auxiliary pump is located beside the pump units. The entire pump assembly is mounted on the rear of the transmission and is driven at engine speed by the transmission input shaft.

Drawing:

Fig.1 Entire pump assembly with external flow unloader drain line


Page 02 of 2

Description:

Present disclosure is about Vehicles flow Unloading at Suction port of hydraulic Pump with external unloader.

Oil is drawn from the hydraulic reservoir into a common pump inlet manifold. Main manifold is part with special Connecting feature to combine the dumped flow from pump with the help of unloader drain line. Flow unloading arrangement from pump P2 is incorporated in unloader block. Unloader block in this case is directly mounted on pump with the help of four bolts for reducing plumbing and cost optimization. Both the flow from P1 and P2 are combined after unloader block. Flow from pump P1 is co...