US3771803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for feeding pressure fluid from a stationary pressure source into a rotating member
Assignee: SMW Spanneinrichtungen Schneider und Weisshaupt Firma
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Filing: 1972-02-10
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Granted: 1973-11-13
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Expires: 1992-02-10
Abstract
Abstract A non-rotatable ring is arranged within an annular recess in a circumferential portion of a rotatable cylindrical member. The facing end walls at each end of the recessed portion of the cylinder and of the ring are provided with annular slots defining pressure transmitting regions and pressure throttling zones. A pressure fluid feeding conduit is arranged within the nonrotatable ring and opens into one of the pressure transmitting regions. The opposite pressure transmitting regions are interconnected and cooperate with the throttling zones in such a manner as to cause axial vibrations of the non-rotational ring resulting in a self-adjusting pressure balance in both interspaces when the pressure fluid is applied into the feeding conduit.
Inventors
- 👤 K Hiestand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:19
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/30; B23B31/302; Y; Y10; Y10T; Y10T279/00; Y10T279/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
232 words
A device for feeding a pressure fluid from a stationary pressure source into a rotatable member including a pressure fluid actuated device controlled by said pressure fluid, comprising, an annular recess defining opposite radial end surfaces and an endless bottom wall in a circumferential portion of said rotatable member and being concentric with the axis of rotation thereof, a single non-rotatable annular member disposed within said recess defining opposite radial faces each facing an end surface, and having an axial play producing opposite interspaces one between each face and the end surface of said members, said end faces in each interspace having a pressure transmitting annular recessed region and a pressure throttling zone formed by a face portion surrounding said region, a first pressure fluid conduit portion connected to said source and disposed within said non-rotatable annular member and opening into one region, a second pressure fluid conduit portion connected to said pressure fluid actuated device and disposed in said rotatable member and opening into said one region near said first conduit portion, said one region being interconnected by passage means with the opposite region, one of said regions having a larger area than the other region, whereby said zones produce a self-adjustable pressure balance between said interspaces by axially reciprocating said non-rotatable member when said pressure fluid is fed through said first conduit portion into said one pressure fluid transmitting region.
Claim 2
Independent Claim
232 words
A device for feeding a pressure fluid from a stationary pressure source into a rotatable member including a pressure fluid actuated device controlled by said pressure fluid, comprising, an annular recess defining opposite radial end surfaces and an endless bottom wall in a circumferential portion of said rotatable member and being concentric with the axis of rotation thereof, a single non-rotatable annular member disposed within said recess defining opposite radial faces each facing an end surface, and having an axial play producing opposite interspaces one between each face and the end surface of said members, said end faces in each interspace having a pressure transmitting annular recessed region and a pressure throttling zone formed by a face portion surrounding said region, a first pressure fluid conduit portion connected to said source and disposed within said non-rotatable annular member and opening into one region, a second pressure fluid conduit portion connected to said pressure fluid actuated device and disposed in said rotatable member and opening into said one region near said first conduit portion, said one region being interconnected by passage means with the opposite region, one of said regions having a larger area than the other region, whereby said zones produce a self-adjustable pressure balance between said interspaces by axially reciprocating said non-rotatable member when said pressure fluid is fed through said first conduit portion into said one pressure fluid transmitting region.
Claim 3
Dependent Claim
44 words
A device according to claim 1, wherein said rotatable member is a chuck body with radially movable jaws and said pressure fluid actuated device is a hydraulic piston axially movable in said rotatable member and operable for controlling the jaws of said chuck body.
Claim 4
Dependent Claim
29 words
A device according to claim 1, further comprising annular chambers defined in said non-rotatable member and respectively opening into said zones for collecting leakage fluid emanating from said regions.
Claim 5
Dependent Claim
31 words
A device according to claim 3, further comprising sealing means located in at least one of said interspaces between the circumference of said rotatable member and said leakage fluid collecting chambers.
Claim 6
Dependent Claim
31 words
A device according to claim 1 wherein said first conduit portion includes a branch connected to said opposite region and comprising a constant throttle, whereby said zones operate as variable throttles.
Claim 7
Dependent Claim
17 words
A device according to claim 1 wherein said non-rotatable annular member is made of a selflubricating material.
Claim 8
Dependent Claim
35 words
A device according to claim 2 further including additional conduit portions for selectively controlling the movement of said hydraulic piston, and additional pressure transmitting regions and pressure throttling zones assigned to said additional conduit portions.
Claim 9
Dependent Claim
45 words
A device according to claim 2 wherein said chuck body is assembled of two parts defining said annular recess and said hydraulic cylinder, said two parts being connected to each other through exchangeable spacer means designed for adjusting the axial play of said non-rotatable member.
Claim 10
Dependent Claim
27 words
A device according to claim 2, further comprising means for holding said annular member in a non-rotatable position and for allowing axial displacement of said annular member.
Claim 11
Dependent Claim
62 words
A device according to claim 2 wherein said non-rotatable annular member has a larger diameter than said recess thereby extending beyond the confines of said rotatable member, at least one of the extending end wall portions of said non-rotatable member being provided with a sealing collar abutting against said chuck body for sealing the interspaces against the entry of any cooling liquid.
Claim 12
Dependent Claim
33 words
A device according to claim 3 further comprising a reversing valve associated with said second conduit portions in said rotatable member for controlling the fLow of said pressure fluid into said pressure device.
Claim 13
Dependent Claim
36 words
A device according to claim 1 wherein said non-rotatable member has a play in radial direction as against said rotatable member defining said passage means between its cylindrical wall and the cylindrical bottom of said recess.
Claim 14
Dependent Claim
20 words
A device according to claim 12 wherein the bottom wall of said recess is provided with an abrasion-resistant cover layer.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |