High fatigue strength check valve

Details High fatigue strength check valve High fatigue strength check valve

1976-07-01

1978-02-28

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1504

Patent

active

040760430

ABSTRACT:
A ball type check valve is provided featuring a simple rugged structure which can be easily fabricated and finished to have excellent fatigue strength and resistance to the stresses of continually repeating pressure fluctuations. The key to the success of this valve is the basic monobloc body used therein. Thus, one single compact body block is fashioned with a longitudinal opening extending therethrough, the median portion of which is a smooth cylindrical bore designed to house the ball stop, biasing spring and associated movable valve parts while the approach sections of the opening leading thereto from either end are of larger cross-section. The valve is then completed by incorporating upstream and downstream tail pieces enclosed within said approach sections and held in end to end direct contact sealing relationship with annular shoulder areas at either end of said median portion by means of suitable back-up attachment devices engaged with said body block.

REFERENCES:
patent: 1275697 (1918-08-01), Joyce
patent: 2274968 (1942-03-01), O'Bannon
patent: 2307949 (1943-01-01), Phillips
patent: 3095900 (1963-07-01), Newhall

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