Patent US3741458A successfully refreshed from Google Patents.
US3741458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic controller for strip material feeder
Assignee: Individual
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Filing: 1971-10-14
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Granted: 1973-06-26
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Expires: 1991-10-14
Abstract
Abstract An apparatus is described for intermittently feeding strip material to a punch press or like machine and including a reciprocal carriage member having material grippers provided thereon. The carriage member is reciprocated by way of an air or hydraulic cylinder and the stroke of the carriage cylinder is controlled by means of a counteracting hydraulic plunger cylinder connected to a closed hydraulic system.
Inventors
- 👤 A Aylesworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:05
CPC Classifications
F; F15; F15B; F15B11/00; B; B21; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/10; B21D43/11; F15B11/06; F15B11/072; F15B11/076; F15B21/00; F15B21/08; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/3051; F15B2211/30525; F15B2211/315; F15B2211/31523; F15B2211/31541; F15B2211/32; F15B2211/327; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/50; F15B2211/55; F15B2211/70; F15B2211/71; F15B2211/7107; F15B2211/7114; F15B2211/7128
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
192 words
In a device for intermittently advancing strip material into a production machine and including a base having a carriage member slidably mounted thereon, a gripper on said carriage member for engaging and holding strip material thereto and power cylinder means mounted on said base for slidably reciprocating said carriage member, the improvement which comprises: a. a double acting hydraulic plunger-cylinder means connected between said carriage and base, whereby movement of the carriage causes relative movement between the plunger and cylinder, b. a first fluid conduit connecting opposite ends of said hydraulic cylinder and including check valve means, c. a second fluid conduit connecting opposite ends of said hydraulic cylinder and including first controllable valve means, and d. first means for closing said controllable valve when a predetermined length of strip material has been advanced by the gripper carriage, whereby during advance of the gripper carriage, movement of the plunger causes flow of fluid through the second conduit and cOntrollable valve until the valve is closed thereby stopping the plunger and carriage and during return of the carriage, movement of the plunger causes flow of fluid through the first conduit and check valve.
Claim 2
Dependent Claim
192 words
In a device for intermittently advancing strip material into a production machine and including a base having a carriage member slidably mounted thereon, a gripper on said carriage member for engaging and holding strip material thereto and power cylinder means mounted on said base for slidably reciprocating said carriage member, the improvement which comprises: a. a double acting hydraulic plunger-cylinder means connected between said carriage and base, whereby movement of the carriage causes relative movement between the plunger and cylinder, b. a first fluid conduit connecting opposite ends of said hydraulic cylinder and including check valve means, c. a second fluid conduit connecting opposite ends of said hydraulic cylinder and including first controllable valve means, and d. first means for closing said controllable valve when a predetermined length of strip material has been advanced by the gripper carriage, whereby during advance of the gripper carriage, movement of the plunger causes flow of fluid through the second conduit and cOntrollable valve until the valve is closed thereby stopping the plunger and carriage and during return of the carriage, movement of the plunger causes flow of fluid through the first conduit and check valve.
Claim 3
Dependent Claim
64 words
A device according to claim 1 which includes a third fluid conduit connecting opposite ends of said hydraulic cylinder, second controllable valve means in said conduit and second means for closing said valve when a different predetermined length of strip material has been advanced by the gripper carriage, whereby the advancing strip material is caused to slow down before coming to a full stop.
Claim 4
Dependent Claim
30 words
A device according to claim 1 wherein said controllable valve means is a solenoid actuated valve which is controlled by means of a limit switch positioned to engage the carriage.
Claim 5
Dependent Claim
33 words
A device according to claim 1 wherein said controllable valve means is a solenoid actuated valve which is controlled by means of an electronic device for measuring the length of strip material advanced.
Claim 6
Dependent Claim
15 words
A device according to claim 1 wherein said controllable valve means is a pneumatic valve.
Claim 7
Dependent Claim
14 words
A device according to claim 1 wherein the power cylinder is an air cylinder.
Claim 8
Dependent Claim
14 words
A device according to claim 1 wherein the power cylinder is a hydraulic cylinder.
Claim 9
Dependent Claim
22 words
A device according to claim 6 wherein said hydraulic cylinder is powered by means of a pump driven by an electric motor.
Claim 10
Dependent Claim
24 words
A device according to claim 8 wherein the pump is connected to the hydraulic power cylinder via a pressure release valve and fluid reservoir.
Claim 11
Dependent Claim
24 words
A device according to claim 1 wherein an adjustable valve is provided for controlling the volume of flow through said first controllable valve means.
Claim 12
Dependent Claim
24 words
A device according to claim 2 wherein an adjustable valve is provided for controlling the volume of flow through said second controllable valve means.
Claim 13
Dependent Claim
201 words
In a device for intermittently advancing strip material into a production machine and including a base having a carriage member slidably mounted thereon, a gripper on said carriage member for engaging and holding strip material thereto and power cylinder means mounted on said base for slidably reciprocating said carriage member, the improvement which comprises: a. a hydraulic plunger-cylinder means connected between said carriage and base, whereby movement of the carriage causes relative movement between the plunger and cylinder, b. a first fluid conduit connecting said hydraulic cylinder to a fluid reservoir and including check valve means, c. a second fluid conduit connecting said hydraulic cylinder to said fluid reservoir and including first controllable valve means, and d. first means for closing said controllable valve when a predetermined length of strip material has been advanced by the gripper carriage, whereby during advance of the gripper carriage, movement of the plunger causes flow of fluid through the second conduit and controllable valve into the reservoir until the valve is closed thereby stopping the plunger and carriage and during return of the carriage, movement of the plunger causes flow of fluid from said reservoir through the first conduit and check valve into said plunger-cylinder.
Claim 14
Dependent Claim
201 words
In a device for intermittently advancing strip material into a production machine and including a base having a carriage member slidably mounted thereon, a gripper on said carriage member for engaging and holding strip material thereto and power cylinder means mounted on said base for slidably reciprocating said carriage member, the improvement which comprises: a. a hydraulic plunger-cylinder means connected between said carriage and base, whereby movement of the carriage causes relative movement between the plunger and cylinder, b. a first fluid conduit connecting said hydraulic cylinder to a fluid reservoir and including check valve means, c. a second fluid conduit connecting said hydraulic cylinder to said fluid reservoir and including first controllable valve means, and d. first means for closing said controllable valve when a predetermined length of strip material has been advanced by the gripper carriage, whereby during advance of the gripper carriage, movement of the plunger causes flow of fluid through the second conduit and controllable valve into the reservoir until the valve is closed thereby stopping the plunger and carriage and during return of the carriage, movement of the plunger causes flow of fluid from said reservoir through the first conduit and check valve into said plunger-cylinder.
Claim 15
Dependent Claim
64 words
A device according to claim 1 which includes a third fluid conduit connecting said hydraulic cylinder to said reservoir, second controllable valve means in said conduit and second means for closing said valve when a different predetermined length of strip material has been advanced by the gripper carriage, whereby the advancing strip material is caused to slow down before coming to a full stop.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |