US3633627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid hammer arrester
Assignee: Precision Plumbing Products Inc
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Filing: 1970-01-29
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Granted: 1972-01-11
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Expires: 1990-01-29
Abstract
Abstract An arrester for inhibiting hammer caused by interruption of fluid flow in conduits comprises a hollow cylindrical body closed at one end and open at the other. A piston is freely slidable within the body forming with the closed end thereof an hermetically sealed gas chamber. A connector connects the open end of the body with the conduit conveying fluid under pressure. Under fluid hammer conditions, the piston is advanced against the gas in the gas chamber. This forms a cushion which absorbs the shock and prevents the development of fluid hammer.
Inventors
- 👤 Charles H Perrott
- 👤 James B Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:27
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/24; F16L55/02; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/31; F15B2201/312; F15B2201/40; F15B2201/41; F15B2201/411; F15B2201/415; F15B2201/4155; F15B2201/50; F15B2201/51
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
A hammer arrester comprising a. a hollow cylindrical body closed at one end and open at the other, b. a piston freely slidable within the body and forming in the closed end thereof a hermetically sealed gas chamber, c. a hollow cylindrical connector open at both ends and secured to the body at the open end thereof, the connector being provided with means for connection to a conduit conveying fluid under pressure, thereby placing the body in open communication with the conduit and the fluid contained in the conduit in pressure contact with the piston, whereby to reciprocate the piston with fluctuation in fluid pressure between advanced and retracted positions, and d. a hollow, frustoconical baffle member in the body between the piston and connector having a central bore communicating the connector with the interior of the body, the outer surface of the baffle member flaring outward in the direction away from the piston, whereby to deflect fluid toward the piston as the latter moves toward the baffle member, thereby damping said piston movement.
Claim 2
Dependent Claim
174 words
A hammer arrester comprising a. a hollow cylindrical body closed at one end and open at the other, b. a piston freely slidable within the body and forming in the closed end thereof a hermetically sealed gas chamber, c. a hollow cylindrical connector open at both ends and secured to the body at the open end thereof, the connector being provided with means for connection to a conduit conveying fluid under pressure, thereby placing the body in open communication with the conduit and the fluid contained in the conduit in pressure contact with the piston, whereby to reciprocate the piston with fluctuation in fluid pressure between advanced and retracted positions, and d. a hollow, frustoconical baffle member in the body between the piston and connector having a central bore communicating the connector with the interior of the body, the outer surface of the baffle member flaring outward in the direction away from the piston, whereby to deflect fluid toward the piston as the latter moves toward the baffle member, thereby damping said piston movement.
Claim 3
Dependent Claim
33 words
The fluid hammer arrester of claim 1 wherein the end of the piston facing the baffle member has a central frustoconical recess and the frustoconical baffle member is dimensioned to enter said recess.
Claim 4
Dependent Claim
27 words
The fluid hammer arrester of claim 1 including valved conduit means communicating with the gas chamber for use in filling the same with an inert compressible gas.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |