Patent US3665948A successfully refreshed from Google Patents.
US3665948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient reduction apparatus for hydraulic system
Assignee: Allen Bradley Co LLC
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Filing: 1970-07-06
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Granted: 1972-05-30
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Expires: 1990-07-06
Abstract
Abstract Apparatus for coupling a hydraulic line to a pressure gauge, to reduce the level of high pressure transients that are applied to the guage, comprising a housing with an inlet connected to the hydraulic line, a variable volume chamber coupled to the inlet through a small diameter passageway orifice, and a narrow diameter passageway connecting the chamber to the pressure gauge. The orifice which connects the inlet to the chamber is oriented to direct a jet of oil at an angle, such as 30* to 45* with the chamber walls, to create a vortex in the chamber so that the incoming jet pressure wave is well mixed with the fluid contained in the chamber volume, thereby reducing localized pressure pulses or shock waves that could pass through the chamber to the gauge.
Inventors
- 👤 Clive P Hohberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:18
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0609; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2087
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
Apparatus for reducing pressure transients in a hydraulic system comprising: a housing having an inlet for coupling to said hydraulic system, an outlet for coupling to a pressure transducer, walls defining a chamber with first and second opposite end portions, a first passageway coupling said inlet to said chamber and a second passageway coupling said chamber to said outlet; said first passageway having a cross-section smaller than the cross-section of said chamber, and said first passageway located between said first end portion of said chamber and said second passageway and oriented to direct a jet of fluid into the chamber with a directional component toward said first end portion of said chamber.
Claim 2
Dependent Claim
112 words
Apparatus for reducing pressure transients in a hydraulic system comprising: a housing having an inlet for coupling to said hydraulic system, an outlet for coupling to a pressure transducer, walls defining a chamber with first and second opposite end portions, a first passageway coupling said inlet to said chamber and a second passageway coupling said chamber to said outlet; said first passageway having a cross-section smaller than the cross-section of said chamber, and said first passageway located between said first end portion of said chamber and said second passageway and oriented to direct a jet of fluid into the chamber with a directional component toward said first end portion of said chamber.
Claim 3
Dependent Claim
68 words
The apparatus described in claim 1 wherein: said chamber has a substantially cylindrical portion, and an end of said first passageway is formed substantially flush with the walls of said chamber and is oriented with a directional component circumferential to the cylindrical walls to direct a fluid stream into said cylindrical portion so that said stream follows a substantially helical path towards said first-end portion of said chamber.
Claim 4
Dependent Claim
107 words
Apparatus for reducing pressure transients in a hydraulic system comprising: means defining an elongated chamber with first and second opposite end portions; means defining an inlet for coupling to said hydraulic system; means defining a first passageway substantially smaller in cross-section than said inlet and smaller in cross-section than said chamber for coupling said inlet to said chamber; means defining an outlet passageway coupled to said chamber; said first passageway oriented to direct a stream of fluid into said chamber so tHat it spirals therein towards said first end portion of said chamber; and said outlet passageway is coupled to said second end portion of said chamber.
Claim 5
Dependent Claim
107 words
Apparatus for reducing pressure transients in a hydraulic system comprising: means defining an elongated chamber with first and second opposite end portions; means defining an inlet for coupling to said hydraulic system; means defining a first passageway substantially smaller in cross-section than said inlet and smaller in cross-section than said chamber for coupling said inlet to said chamber; means defining an outlet passageway coupled to said chamber; said first passageway oriented to direct a stream of fluid into said chamber so tHat it spirals therein towards said first end portion of said chamber; and said outlet passageway is coupled to said second end portion of said chamber.
Claim 6
Dependent Claim
52 words
The apparatus described in claim 3 wherein: said hydraulic system includes a line with a predetermined internal cross-section for coupling to said inlet: said chamber has a predetermined minimum cross-section; and The cross-sectional area at said first passageway is less than one-hundredth the cross-sectional area of either said line of said chamber.
Claim 7
Dependent Claim
130 words
Apparatus for reducing pressure transients in a hydraulic system comprising: means defining an elongated chamber with first and second opposite end portions, including a first hollow member and a second hollow member moveable towards and away from said first member to vary the volume of said chamber; means defining an inlet for coupling to said hydraulic system; means defining a passageway substantially smaller in cross-section than said inlet and smaller in cross-section than said chamber for coupling said inlet to said chamber; means defining an outlet passageway coupled to said chamber; said first passageway oriented to direct a stream of fluid into said chamber so that it spirals therein towards said first end portion of said chamber; and said outlet is coupled to said second end portion of said chamber.
Claim 8
Dependent Claim
130 words
Apparatus for reducing pressure transients in a hydraulic system comprising: means defining an elongated chamber with first and second opposite end portions, including a first hollow member and a second hollow member moveable towards and away from said first member to vary the volume of said chamber; means defining an inlet for coupling to said hydraulic system; means defining a passageway substantially smaller in cross-section than said inlet and smaller in cross-section than said chamber for coupling said inlet to said chamber; means defining an outlet passageway coupled to said chamber; said first passageway oriented to direct a stream of fluid into said chamber so that it spirals therein towards said first end portion of said chamber; and said outlet is coupled to said second end portion of said chamber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |