US 9,808,895 B2Granted

Method for producing a piston pump

AssigneeRobert Bosch GmbH

InventorsBernard Huckenbeck, Marc Zimmermann, Martin Juretko

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Abstract

A method is used to produce a piston pump having a housing and a piston subassembly. The piston subassembly is displaceably guided in the housing and has a first, rod-like piston element and a second, sleeve-like piston element. The second piston element is connected to the first piston element via a press fit. At least one transverse bore and a longitudinal bore are arranged in the second piston element. A stop edge for the housing is arranged on the second piston element. The piston subassembly also has an inlet valve, which includes a receiving element, in which an inlet valve spring and an inlet valve sealing element are arranged. The piston subassembly also has a corresponding inlet valve seat, which is arranged on the second piston element. While the second piston element is being machined, the press fit and the longitudinal bore are produced and/or finished in one step.

Claims14

Dependent claims

A method for producing a piston pump having a housing, comprising:

producing a piston assembly configured to be guided displaceably in the housing, producing the piston assembly including:
producing a first rod-shaped piston element,
producing a second sleeve-shaped piston element, and
connecting the second sleeve-shaped piston element to the first rod-shaped piston element via a press fit with a stop edge for the housing on the second sleeve-shaped piston element positioned directly radially outwardly of the first rod-shaped piston element, wherein producing the second sleeve-shaped piston element includes arranging at least one transverse bore and a longitudinal bore which corresponds with the at least one transverse bore in the second sleeve-shaped piston element, and arranging the stop edge for the housing on the second sleeve-shaped piston element;
producing an inlet valve including a receiving element in which an inlet valve spring and an inlet valve sealing element are arranged, and
arranging an inlet valve seat corresponding to the inlet valve on the second sleeve-shaped piston element,
wherein, during machining of the second sleeve-shaped piston element, the press fit and the longitudinal bore are at least one of produced and finished.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/980,722Filed 28 Dec 2015 · continuation
Priority: DE 10 2010 040 81915 Sep 2010
Published: US 2016/0129536 A112 May 2016
Granted: 7 Nov 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B23P 15/10
Making specific metal objects by operations not covered by a single other subclass or a group in this subclass: pistons
F04B 1/0452
Details or component parts: distribution members, e.g. valves
F04B 53/1087
Valves; Arrangement of valves: valve seats
F04B 53/12
Valves; Arrangement of valves: arranged in or on pistons

Family

PCT/EP2011/062241Parent of this continuation · filed 18 Jul 2011
US 2016/0129536 A1Pre-grant publication · published 12 May 2016
Application13/823,357Parent of this continuation
US 2013/0287610 A1Published application
US 9,808,895 B2This patent

From the US filing history. Foreign family members aren’t listed.