Patent US5871928A successfully refreshed from Google Patents.
US3597882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic balancing of rotary members using movable weights
Assignee: Newall Engineering Co Ltd
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Filing: 1969-05-05
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Granted: 1971-08-10
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Expires: 1989-05-05
Abstract
Abstract The invention concerns a balancing assembly for rotary members such as grinding wheels. Two cylinders at right angles in the plane of rotation of the wheel each contain hydraulic fluid and a slidable balance weight. Signals from a vibration pickup are used to control fluid flow to and from the ends of the cylinders to alter the positions of the weights and correct unbalance of the wheel.
Inventors
- 👤 Anthony John Riddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/30; G01M1/36; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/211; Y10T74/2114; Y10T74/2115
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
In combination with a rotary member having an axis of rotation, a balancing assembly comprising at least one hydraulic cylinder which is rotatable with the rotary member and which contains hydraulic fluid, a balance weight slidably mounted in said cylinder, said weight dividing said fluid into first anD second volumes at respective ends of said cylinder, and means for altering the aforementioned volumes to move the weight along the cylinder; said cylinder being oriented with respect to said rotary member whereby movement of the said weight alters its distance from said axis of rotation.
Claim 2
Dependent Claim
94 words
In combination with a rotary member having an axis of rotation, a balancing assembly comprising at least one hydraulic cylinder which is rotatable with the rotary member and which contains hydraulic fluid, a balance weight slidably mounted in said cylinder, said weight dividing said fluid into first anD second volumes at respective ends of said cylinder, and means for altering the aforementioned volumes to move the weight along the cylinder; said cylinder being oriented with respect to said rotary member whereby movement of the said weight alters its distance from said axis of rotation.
Claim 3
Dependent Claim
41 words
The combination as set forth in claim 1 in which two of said assemblies are provided, the two cylinders of said assemblies being disposed along first and second axes at right angles in a plane normal to said axis of rotation.
Claim 4
Dependent Claim
71 words
The combination set forth in claim 2 further comprising a vibration pickup operative to provide signals representative of the unbalance of the rotary member, means for resolving the said signals along said first and second axes, fluid flow control means coupled to each end of each cylinder, and means responsive to the resolved signals to actuate the fluid flow control means for altering the positions of the weights in said cylinders.
Claim 5
Dependent Claim
22 words
The combination set forth in claim 3 in which a hydraulic rotatable joint couples said fluid flow control means and the cylinders.
Claim 6
Dependent Claim
25 words
The combination set forth in claim 1 in which the cylinder is straight and is disposed in the plane of rotation of the rotary member.
Claim 7
Dependent Claim
29 words
The combination set forth in claim 5 in which the said weight is movable to equal extents on either side of the axis of rotation of the rotary member.
Claim 8
Dependent Claim
100 words
In combination with a grinding wheel rotatable in a predetermined plane of rotation and about a predetermined axis, a balancing assembly comprising a cylinder containing hydraulic fluid, a balance weight sealingly slidable along said cylinder, said cylinder being oriented in said plane of rotation and intersecting said axis, a fluid conduit coupled to each end of said cylinder, inlet and outlet valve means coupling each said fluid conduit to the respective end of said cylinder, each valve means being openable under a predetermined pressure, and fluid flow control means for supplying fluid pressure to said conduits to move said weights.
Claim 9
Dependent Claim
100 words
In combination with a grinding wheel rotatable in a predetermined plane of rotation and about a predetermined axis, a balancing assembly comprising a cylinder containing hydraulic fluid, a balance weight sealingly slidable along said cylinder, said cylinder being oriented in said plane of rotation and intersecting said axis, a fluid conduit coupled to each end of said cylinder, inlet and outlet valve means coupling each said fluid conduit to the respective end of said cylinder, each valve means being openable under a predetermined pressure, and fluid flow control means for supplying fluid pressure to said conduits to move said weights.
Claim 10
Dependent Claim
30 words
The combination set forth in claim 7 wherein two of said assemblies are provided, the cylinder of one assembly being at right angles to the cylinder of the other assembly.
Claim 11
Dependent Claim
16 words
The combination set forth in claim 8 wherein said assemblies are mounted within said grinding wheel.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |