Patent US2610864A successfully refreshed from Google Patents.
Patent US4536000A successfully refreshed from Google Patents.
US4536000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jaw position and/or force detector for power chuck
Assignee: Individual
•
Filing: 1983-04-22
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Granted: 1985-08-20
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Expires: 2003-04-22
Abstract
Abstract A chuck has a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body. Respective transducers on the chuck body are connected to the jaws for generating a signal proportional to a parameter of the respective jaw. These signals are transmitted from the chuck body to a stationary signal receiver adjacent the chuck body wholly without physical contact with the signal transmitter. Similarly, a stationary energy transmitter adjacent the chuck body transmits energy and a receiver on the chuck body receives the transmitted energy wholly without physical contact with the energy transmitter and powers the signal transmitter therewith. The transducers can be position or force transducers, for instance constituted by strain gauges or linear potentiometers. The signal and energy transmitters and receivers are formed by coaxial coils carried on a fixed support and on the chuck.
Inventors
- 👤 Gunter H. Rohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:45
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/002; B23Q17/005; B23Q1/00; B23Q1/0009; Y; Y10; Y10T; Y10T279/00; Y10T279/19; Y10T279/1986; Y10T279/21
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
200 words
In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising: respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having a radially inner part forming the respective workpiece-engaging face and a radially outer part coupled to the operator and limitedly radially displaceable relative to the respective inner part, the transducers being engaged generally between the parts.
Claim 2
Dependent Claim
200 words
In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising: respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having a radially inner part forming the respective workpiece-engaging face and a radially outer part coupled to the operator and limitedly radially displaceable relative to the respective inner part, the transducers being engaged generally between the parts.
Claim 3
Dependent Claim
20 words
The improved chuck defined in claim 1 wherein the transducers are braced radially between the respective inner and outer parts.
Claim 4
Dependent Claim
58 words
The improved chuck defined in claim 1 wherein each jaw is provided with an elastomeric element braced radially between the respective inner and outer parts, whereby the element is compressed radially and swells tangentially when the respective inner face bears on a workpiece, the respective transducer being braced tangentially between the element and one of the respective parts.
Claim 5
Dependent Claim
32 words
The improved chuck defined in claim 1 wherein the signal-transmitting means includes electronic processing circuit means connected to the transducers to transform the outputs of same and powered from the energy-receiving means.
Claim 6
Dependent Claim
16 words
The improved chuck defined in claim 4 wherein the transmitting and receiving means include respective coils.
Claim 7
Dependent Claim
15 words
The improved chuck defined in claim 5 wherein the coils are centered on the axis.
Claim 8
Dependent Claim
26 words
The improved chuck defined in claim 5 wherein the chuck body is formed with radially open grooves containing the coils of the signal-transmitting and energy-receiving means.
Claim 9
Dependent Claim
32 words
The improved chuck defined in claim 5 wherein the chuck body is provided with a rear add-on plate formed with radially open grooves containing the coils of the signal-transmitting and energy-receiving means.
Claim 10
Dependent Claim
20 words
The improved chuck defined in claim 1 wherein the transducers are carried on and radially displaceable with the respective jaws.
Claim 11
Dependent Claim
33 words
The improved chuck defined in claim 9 wherein the signal-transmitting means includes electronic processing circuit means and a flexible conductor connected between same and the respective transducers for transforming the outputs of same.
Claim 12
Dependent Claim
33 words
The improved chuck defined in claim 9 wherein the signal-transmitting means includes electronic processing circuit means and a slide-type commutating connector connecting same to the respective transducers for transforming the outputs of same.
Claim 13
Dependent Claim
213 words
In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising: respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having an axially outer part forming the respective face, an axially inner part connected to the operator, and a bolt displaceable between an outer position interconnecting the respective parts radially and an inner position permitting relative radial displacement of the respective parts, the transducers being braced against the respective bolts.
Claim 14
Dependent Claim
213 words
In a chuck having a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body, the improvement comprising: respective means on the chuck body including transducers connected to the jaws for generating a signal proportional to a parameter of the respective jaw; signal-transmitting means on the chuck for transmitting the signals from the chuck body; stationary signal-receiving means adjacent the chuck body for receiving the transmitted signals wholly without physical contact with the signal-transmitting means; stationary energy-transmitting means adjacent the chuck body for transmitting energy; and respective energy-receiving means on the chuck body for receiving the transmitted energy wholly without physical contact with the energy-transmitting means and for powering the signal-transmitting means therewith, said transducer being a force transducer and is braced between the respective jaw and the operator, each jaw having an axially outer part forming the respective face, an axially inner part connected to the operator, and a bolt displaceable between an outer position interconnecting the respective parts radially and an inner position permitting relative radial displacement of the respective parts, the transducers being braced against the respective bolts.
Claim 15
Dependent Claim
21 words
The improved chuck defined in claim 12 wherein each transducer is braced axially between the respective bolt and the chuck body.
Claim 16
Dependent Claim
23 words
The improved chuck defined in claim 2 wherein each transducer is braced radially between the respective bolt and the respective inner jaw part.
Claim 17
Dependent Claim
32 words
The improved chuck defined in claim 12 wherein the signal-transmitting means includes electronic processing circuit means connected to the transducers to transform the outputs of same and powered from the energy-receiving means.
Claim 18
Dependent Claim
16 words
The improved chuck defined in claim 15 wherein the transmitting and receiving means include respective coils.
Claim 19
Dependent Claim
15 words
The improved chuck defined in claim 16 wherein the coils are centered on the axis.
Claim 20
Dependent Claim
26 words
The improved chuck defined in claim 16 wherein the chuck body is formed with radially open grooves containing the coils of the signal-transmitting and energy-receiving means.
Claim 21
Dependent Claim
32 words
The improved chuck defined in claim 16 wherein the chuck body is provided with a rear add-on plate formed with radially open grooves containing the coils of the signal-transmitting and energy-receiving means.
Claim 22
Dependent Claim
20 words
The improved chuck defined in claim 12 wherein the transducers are carried on and radially displaceable with the respective jaws.
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |