Patent US4033872A successfully refreshed from Google Patents.
US4033872A
Expired / Lapsed
US
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Reservoir tank
Assignee: Nissan Motor Co Ltd
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Filing: 1975-11-07
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Granted: 1977-07-05
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Expires: 1995-11-07
Abstract
Abstract A reservoir tank has filling and outlet ports which are provided in a common aperture formed through the tank top.
Inventors
- 👤 Yoshiro Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:43
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/26; B; B01; B01D; B01D35/00; B01D35/02; B01D35/027; B60; B60T; B60T11/00; B60T11/10; B60T11/26; B60T13/00; B60T13/10; B60T13/12; B62; B62D; B62D5/00; B62D5/06; B62D5/062; B01D2201/00; B01D2201/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A reservoir tank for use in a hydraulic system, comprising a tank top formed therethrough with a first aperture, a hollow member vertically extending from the outside of said tank thereinto through said first aperture and having therein a filling chamber, an outlet chamber located below said filling chamber, and an outlet passage located laterally of said filling chamber and above said outlet chamber and communicating with said outlet chamber, said hollow member having a bottom end which submerges into and communicates with hydraulic fluid in said tank, a horizontal partition member horizontally located in said hollow member and separating said filling chamber and said outlet chamber from each other, a vertical partition member fixedly connected to said horizontal partition member and vertically extending upwardly from said horizontal partition member and separating said filling chamber and said outlet passage from each other, said filling chamber communicating with the outside of said tank for delivery of hydraulic fluid thereinto, said hollow member being formed therethrough below said tank top with a second aperture opening from said filling chamber into said tank for admission of said hydraulic fluid in said filling chamber thereinto, said hollow member being formed therethrough above said tank top with a third aperture opening from said outlet passage into the outside of said tank.
Claim 2
Dependent Claim
216 words
A reservoir tank for use in a hydraulic system, comprising a tank top formed therethrough with a first aperture, a hollow member vertically extending from the outside of said tank thereinto through said first aperture and having therein a filling chamber, an outlet chamber located below said filling chamber, and an outlet passage located laterally of said filling chamber and above said outlet chamber and communicating with said outlet chamber, said hollow member having a bottom end which submerges into and communicates with hydraulic fluid in said tank, a horizontal partition member horizontally located in said hollow member and separating said filling chamber and said outlet chamber from each other, a vertical partition member fixedly connected to said horizontal partition member and vertically extending upwardly from said horizontal partition member and separating said filling chamber and said outlet passage from each other, said filling chamber communicating with the outside of said tank for delivery of hydraulic fluid thereinto, said hollow member being formed therethrough below said tank top with a second aperture opening from said filling chamber into said tank for admission of said hydraulic fluid in said filling chamber thereinto, said hollow member being formed therethrough above said tank top with a third aperture opening from said outlet passage into the outside of said tank.
Claim 3
Dependent Claim
17 words
A reservoir tank as claimed in claim 1, in which said hollow member comprises a cylindrical member.
Claim 4
Dependent Claim
68 words
A reservoir tank as claimed in claim 1, in which said hollow member and said vertical and horizontal partition members defining said outlet passage and said outlet chamber are impervious to, when suction acts on said outlet chamber through said third aperture, allow hydraulic fluid in said tank to be drawn by the suction to the outside of said tank through said outlet chamber and said outlet passage.
Claim 5
Dependent Claim
34 words
A reservoir tank as claimed in claim 1, in which said tank top is further formed therethrough with an aperture through which hydraulic fluid used in said hydraulic system is returned into said tank.
Claim 6
Dependent Claim
45 words
A reservoir tank as claimed in claim 1, in which said cylindrical member has a first oil filter covering said second aperture and a second oil filter having the shape of an inverted funnel and covering the horizontal cross sectional area of said outlet chamber.
Claim 7
Dependent Claim
58 words
A reservoir tank as claimed in claim 1, in which said horizontal partition member is formed therein at a periphery thereof with a circular aperture providing communication between said outlet passage and said outlet chamber, and said vertical partition member comprises a conduit being circular in cross section shape and interconnecting said circular aperture and said third aperture.
Claim 8
Dependent Claim
75 words
A reservoir tank as claimed in claim 1, in which said horizontal partition member has an arcuate aperture formed between an edge thereof and said hollow member and providing communication between said outlet passage and said outlet chamber, and said vertical partition member comprises a flat member fixedly connected to said edge of said horizontal partition member and to said hollow member and defining a space above said arcuate aperture together with said hollow member.
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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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |