Patent US3770305A successfully refreshed from Google Patents.
US3770305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for conveying fluid into a rotatable hollow casing
Assignee: SKF Industrie SpA
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Filing: 1972-07-21
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Granted: 1973-11-06
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Expires: 1992-07-21
Abstract
Abstract A device for conveying a fluid under high pressure to the interior of a hollow rotatable casing without losing fluid pressure is disclosed. The device comprises a fixed sleeve with respect to which the hollow casing is rotatable, there being a ball race at least at one end of the sleeve which is shaped, at that end, to form one of the tracks for the ball race. The hollow casing has at least one radial opening in the wall thereof and the sleeve has at least one corresponding opening axially adjacent the opening in the casing. The sleeve is formed at each end with inwardly directed radial shoulders which, together with an outward radial shoulder, or a ring forming the other track of the ball race, form a housing at each end for a flexible washer which covers the annular gap between inward shoulder and the ring or the outward shoulder. The flexibility of the washers allows them to press against the wall of the housing when the pressure increases due to the fluid flowing in under high pressure, and to seal the gap to prevent any loss of fluid or fluid pressure.
Inventors
- 👤 D Camosso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:33
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0824; F16L27/087; F16L27/093; F16C; F16C2361/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
261 words
A device for conveying fluid under pressure into a hollow rotatable casing having an opening in the side wall thereof, said device comprising: a fixed sleeve surrounding said hollow rotatable casing, extending axially on either side of said opening in the side wall thereof and defining a chamber between itself and said hollow rotatable element, means defining at least one opening in the side wall of said sleeve, at least one rolling element bearing between said fixed sleeve and said hollow rotatable casing at one end of said sleeve, radially inwardly directed shoulder means integral with said sleeve at each end of said sleeve, each of said shoulders having a recess therein, each recess having a pair of radially extending side walls and an axially extending bottom wall, a flexible washer in each recess freely rotatable on said casing and having clearance between the outer periphery of said washer and said bottom wall, each of said recesses having an axial width greater than the axial width of said washer whereby said washer is freely rotatable in said recess but restrained against axial displacement from said recess, annular abutment means secured to said casing and disposed axially outwardly of each of said washers and extending radially in close proximity to said shoulder means, and said washers being deformable whereby upon a sudden increase in fluid pressure in said chamber said washers are axially forced apart and deformed against the side walls of said recesses and said abutment means to seal said chamber against loss of fluid from the ends of said sleeve.
Claim 2
Independent Claim
261 words
A device for conveying fluid under pressure into a hollow rotatable casing having an opening in the side wall thereof, said device comprising: a fixed sleeve surrounding said hollow rotatable casing, extending axially on either side of said opening in the side wall thereof and defining a chamber between itself and said hollow rotatable element, means defining at least one opening in the side wall of said sleeve, at least one rolling element bearing between said fixed sleeve and said hollow rotatable casing at one end of said sleeve, radially inwardly directed shoulder means integral with said sleeve at each end of said sleeve, each of said shoulders having a recess therein, each recess having a pair of radially extending side walls and an axially extending bottom wall, a flexible washer in each recess freely rotatable on said casing and having clearance between the outer periphery of said washer and said bottom wall, each of said recesses having an axial width greater than the axial width of said washer whereby said washer is freely rotatable in said recess but restrained against axial displacement from said recess, annular abutment means secured to said casing and disposed axially outwardly of each of said washers and extending radially in close proximity to said shoulder means, and said washers being deformable whereby upon a sudden increase in fluid pressure in said chamber said washers are axially forced apart and deformed against the side walls of said recesses and said abutment means to seal said chamber against loss of fluid from the ends of said sleeve.
Claim 3
Dependent Claim
62 words
The device of claim 1 wherein said rolling element bearing comprises: a ring of rolling elements, an annular element forming one track for said ring of rolling elements, said annular element being mounted on said hollow rotatable casing for rotation therewith, the end of said sleeve being shaped to form the other track for said rolling element of said rolling element bearing.
Claim 4
Dependent Claim
66 words
The device of claim 1 wherein there is a rolling element bearing at each end of said fixed sleeve, each end of said fixed sleeve being shaped to form one track for the rolling elements of said rolling element bearings, and respective annular elements fixed to said hollow rotatable casing for rotation therewith forming the other tracks for said rolling elements of said rolling element bearings.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |