公开(公告)号：US3744508A

公开(公告)日：1973-07-10

申请号：US3744508D

申请日：1969-08-05

Applicant: DANFOSS AS

Inventor： HANSEN G ,  PETERSEN J

IPC: F16K17/00 ,  F04B53/10 ,  G05D16/08 ,  G05D7/01

CPC classification number: G05D16/10 ,  G05D16/08 ,  Y10T137/2587 ,  Y10T137/2607

Abstract: The invention relates to a pressure regulating valve assembly for pumps. The assembly includes two relatively movable pistons with one being a setting piston acted upon by supply pressure and a rated spring and the other being a regulating piston which controls a return orifice and is acted upon by the supply pressure and a differential spring. The supply pressure for the regulating piston is delivered through a modulated restrictor passage with the pressure drop in the restrictor passage corresponding to the quantity of pressurized fluid delivered therethrough. The regulating piston is hydraulically loaded by only a differential pressure which provides a greater ease in movement and allows a relatively weak differential spring to be utilized.

公开(公告)号：US3725990A

公开(公告)日：1973-04-10

申请号：US3725990D

申请日：1971-05-12

Applicant: DANFOSS AS

Inventor： PETERSEN J ,  STURLASON L

IPC: B21D22/26 ,  B21D53/00 ,  F16K15/04

CPC classification number: B21D53/00 ,  B21D22/26 ,  F16K15/044 ,  Y10T29/49409 ,  Y10T29/49423 ,  Y10T137/7927

Abstract: The invention relates to a one-way valve and to a method for manufacturing a one-way valve. The method involves drawing a cupshaped housing from sheet metal in several stages and punching a valve seat in the bottom of the cup. A shoulder is formed in the housing by means of a profiled drawing mandrel and by fitting a washer against the shoulder to serve as a backing member for a tapered spring.

Abstract translation: 本发明涉及一种单向阀和一种用于制造单向阀的方法。 该方法包括从金属板上分几个阶段抽出一个杯形外壳，并冲压杯底部的阀座。 肩部通过成型拉伸心轴形成在壳体中，并且通过将垫圈装配到肩部上以用作锥形弹簧的背衬构件。