US3715946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed control apparatus for a rotary tool
Assignee: Individual
•
Filing: 1971-09-15
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Granted: 1973-02-13
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Expires: 1991-09-15
Abstract
Abstract A saw blade is rotated by an electric motor while fed by a hydraulic feeding motor into a workpiece. A regulating throttle controls the hydraulic motor to vary the feeding speed, and is operated by a control means to either slowly increase the feeding speed or to rapidly reduce speed in accordance with the indications of a torque responsive amperemeter in the circuit of the electric motor. Two manually settable stops limit the movement of the regulating throttle independently of the control means and of the indication of the amperemeter in two end positions in which the hydraulic feeding motor is set to a maximum and a minimum feeding speed, respectively, selected for a specific workpiece.
Inventors
- 👤 D Kaltenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:37
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/04; B23D; B23D45/00; B23D45/04; B23D45/042; B23D47/00; B23D47/08; B23D47/10; B23D47/12; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T83/00; Y10T83/141; Y10T83/768; Y10T83/7755; Y10T83/7788; Y10T83/849; Y10T83/869; Y10T83/8735
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
232 words
Feed control apparatus for a rotary tool, comprising a motor means for rotating the tool; feeding means for feeding the tool into a material; regulating means connected with said feeding means for controlling the feeding speed of said tool and including a movable regulating member; control means connected with said regulating means and having a normal position for operating said regulating means to slowly increase the feeding speed, and a control position for operating said regulating means to rapidly reduce the feeding speed; torque responsive sensing means for sensing the load torque acting on said motor means and connected with said control means for setting the same to said control position when sensing a maximum load torque so that said regulating means rapidly reduces the feeding speed and thereby said load torque until said sensing means sets at a minimum load torque said control means back to said normal position; and first and second manually settable stops for limiting movement of said regulating member independently of said control means and sensing means in two positions in which said regulating means sets said feeding means to a maximum feeding speed and to a minimum feeding speed, respectively, selected for a specific workpiece by setting said stops, so that said regulating member moves rapidly toward said second stop for obtaining minimum feeding speed and slowly toward said first stop for obtaining maximum feeding speed.
Claim 2
Dependent Claim
232 words
Feed control apparatus for a rotary tool, comprising a motor means for rotating the tool; feeding means for feeding the tool into a material; regulating means connected with said feeding means for controlling the feeding speed of said tool and including a movable regulating member; control means connected with said regulating means and having a normal position for operating said regulating means to slowly increase the feeding speed, and a control position for operating said regulating means to rapidly reduce the feeding speed; torque responsive sensing means for sensing the load torque acting on said motor means and connected with said control means for setting the same to said control position when sensing a maximum load torque so that said regulating means rapidly reduces the feeding speed and thereby said load torque until said sensing means sets at a minimum load torque said control means back to said normal position; and first and second manually settable stops for limiting movement of said regulating member independently of said control means and sensing means in two positions in which said regulating means sets said feeding means to a maximum feeding speed and to a minimum feeding speed, respectively, selected for a specific workpiece by setting said stops, so that said regulating member moves rapidly toward said second stop for obtaining minimum feeding speed and slowly toward said first stop for obtaining maximum feeding speed.
Claim 3
Dependent Claim
232 words
Feed control apparatus for a rotary tool, comprising a motor means for rotating the tool; feeding means for feeding the tool into a material; regulating means connected with said feeding means for controlling the feeding speed of said tool and including a movable regulating member; control means connected with said regulating means and having a normal position for operating said regulating means to slowly increase the feeding speed, and a control position for operating said regulating means to rapidly reduce the feeding speed; torque responsive sensing means for sensing the load torque acting on said motor means and connected with said control means for setting the same to said control position when sensing a maximum load torque so that said regulating means rapidly reduces the feeding speed and thereby said load torque until said sensing means sets at a minimum load torque said control means back to said normal position; and first and second manually settable stops for limiting movement of said regulating member independently of said control means and sensing means in two positions in which said regulating means sets said feeding means to a maximum feeding speed and to a minimum feeding speed, respectively, selected for a specific workpiece by setting said stops, so that said regulating member moves rapidly toward said second stop for obtaining minimum feeding speed and slowly toward said first stop for obtaining maximum feeding speed.
Claim 4
Dependent Claim
232 words
Feed control apparatus for a rotary tool, comprising a motor means for rotating the tool; feeding means for feeding the tool into a material; regulating means connected with said feeding means for controlling the feeding speed of said tool and including a movable regulating member; control means connected with said regulating means and having a normal position for operating said regulating means to slowly increase the feeding speed, and a control position for operating said regulating means to rapidly reduce the feeding speed; torque responsive sensing means for sensing the load torque acting on said motor means and connected with said control means for setting the same to said control position when sensing a maximum load torque so that said regulating means rapidly reduces the feeding speed and thereby said load torque until said sensing means sets at a minimum load torque said control means back to said normal position; and first and second manually settable stops for limiting movement of said regulating member independently of said control means and sensing means in two positions in which said regulating means sets said feeding means to a maximum feeding speed and to a minimum feeding speed, respectively, selected for a specific workpiece by setting said stops, so that said regulating member moves rapidly toward said second stop for obtaining minimum feeding speed and slowly toward said first stop for obtaining maximum feeding speed.
Claim 5
Dependent Claim
67 words
Feed control apparatus as claimed in claim 1 wherein said control means include a movable control member operated under the control of said torque responsive sensing means; and means including a slip clutch connecting said control member with said regulating member so that said control member can continue to move under the control of said sensing means when said regulating member abuts one of said settable stops.
Claim 6
Dependent Claim
137 words
Feed control apparatus as claimed in claim 1 wherein said control means include a control cylinder and a control piston forming in said conTrol cylinder first and second control chambers, pump means including a pressure conduit and a return conduit, a reversing control valve having a normal position for connecting said pressure conduit with said first control chamber and said return conduit with said second control chamber and a control position reversing the flow, a throttle connecting said second control chamber with said reversing control valve, a check valve connecting said reversing valve with said second control chamber, operating means controlled by said torque responsive means for shifting said reversing control valve to said control position when sensing a maximum load torque acting on said motor means; and means connecting said control piston with said regulating member.
Claim 7
Dependent Claim
31 words
Feed control apparatus as claimed in claim 1 comprising manually operated means connected to said regulating member for operating said regulating means to set said feeding means to different feeding speeds.
Claim 8
Dependent Claim
59 words
Feed control apparatus as claimed in claim 4 wherein said manually operated means has a normal position moving along a path limited by said settable stops, and a displaced position moving along a different path passing over said settable stops for controlling said regulating means and feeding means to obtain feeding speeds exceeding said maximum and minimum feeding speeds.
Claim 9
Dependent Claim
93 words
Feed control apparatus as claimed in claim 1 wherein said feeding means includes a feeding cylinder and a feeding piston forming feeding chambers in said feeding cylinder, said feeding piston being connected with said tool, pump means including a pressure conduit and a return conduit, and reversing valve means for connecting said conduits with said feeding chambers, respectively; and wherein said regulating means includes adjustable throttle means operated by said control means and being located in said return conduit for reducing flow out of said feeding cylinder during feeding movement of the tool.
Claim 10
Dependent Claim
71 words
Feed control apparatus as claimed in claim 1 wherein said torque responsive sensing means includes at least one limit mark member settable to a selected maximum load torque, a movable member cooperating with said limit member and being responsive to the load torque, and means for connecting said movable member with said control means so that the feeding speed is rapidly reduced when said movable member reaches said limit mark member.
Claim 11
Dependent Claim
49 words
Feed control apparatus as claimed in claim 7 wherein said torque responsive sensing means include a second limit mark member settable to a selected minimum load torque so that the feeding speed is slowly increased by said control means when said movable member reaches said second limit mark member.
Claim 12
Dependent Claim
55 words
Feed control apparatus as claimed in claim 8 wherein said motor means includes an electric motor; and wherein said torque responsive sensing means includes an amperemeter having said movable member as an indicator; wherein said operating means include electromagnetic means; and circuit means connecting said limit mark members and said indicator with said electromagnetic means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |