Hydraulic damper valve

Details Hydraulic damper valve Hydraulic damper valve

2011-04-19

2011-04-19

Jones, David B (Department: 3725)

Metal working

Means to assemble or disassemble

Overedge assembling means

C029S243523, C072S391400

Reexamination Certificate

active

07926157

ABSTRACT:
A breakstem rivet placing tool conventionally includes a flow restrictions for hydraulic fluid used to drive the tool in a stem pulling direction. This serves to prevent recoil of the tool due to rapid acceleration of an internal piston when the stem of the breakstem rivet breaks. Prior art flow restrictions create a jet of high velocity hydraulic fluid into the tool which may damage components by erosion. A revised fluid damper valve deflects and/or diffuses the fluid flow to avoid damage by erosion.

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European Combined Search and Examination Report dated May 23, 2006 which issued in connection with corresponding British Application No. GB0605910.9.
PCT International Search Report dated Jun. 5, 2007 which issued in connection with corresponding International Application No. PCT/GB2007/001000.

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