Screwable check valve

Fluid handling – Line condition change responsive valves – Direct response valves

Reexamination Certificate

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Details

C137S269000, C137S315330, C137S454200, C137S538000, C251S366000

Reexamination Certificate

active

07395836

ABSTRACT:
Disclosed is a check valve (5) that is screwed into a threaded bore (1) of a housing (2) of a hydraulic subassembly between a first pressure side (26) and a second pressure side (27) by means of an external thread (11) which is disposed in a first cylinder section (8) of a cylindrical valve housing (6) of the check valve (5). A passage duct (39) which allows a hydraulic fluid to flow between the sidewall of the threaded bore (1) and a first removed portion (16) of the surface area (10) of the cylindrical valve housing (6) is embodied in at least one angular segment (a1, a2, and a3) of the valve housing (6).

REFERENCES:
patent: 2912001 (1959-11-01), Green
patent: 4977927 (1990-12-01), Hill
patent: 6651693 (2003-11-01), Simmons et al.
patent: 2002/0144734 (2002-10-01), Kjellander et al.
patent: 787.894 (1972-12-01), None
patent: 2449443 (1976-04-01), None
patent: 8801759 (1989-06-01), None
patent: 29620916 (1998-04-01), None
patent: 853.058 (1939-04-01), None

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