Patent US3570349A successfully refreshed from Google Patents.
US3570349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw for dividing workpieces
Assignee: Schloemann AG
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Filing: 1969-01-21
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Granted: 1971-03-16
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Expires: 1989-01-21
Abstract
Abstract A saw for dividing one or more workpieces lying side-by-side parallel to one another in a clamping device, in which the saw is moved while the clamping device is stationary, and the workpieces are clamped in the clamping device in a vertical direction between an upper jaw and a lower jaw, and at the same time are pressed in a horizontal direction against a stationary abutment arranged on the side of the clamping device remote from the saw, so that the clamping device is freely accessible from the other side and also transversely to the direction of motion of the saw. The saw, with respect to its speed of advance, is positively guided, and the upper jaw, for the clamping of the workpieces in a vertical direction, can swing about a pivot, and, for the pressing of the workpieces against the stationary abutment, is provided with a further abutment displaceable relatively to the stationary abutment, so that a so-called drawing of the saw into the material is prevented, and the upper jaw, upon coming into contact with the workpieces, is moved exactly perpendicularly to the bearing plane of the workpieces.
Inventors
- 👤 Otto Behrendt
- 👤 Helmut Robra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:54
CPC Classifications
B; B23; B23D; B23D47/00; B23D47/04; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5715; Y10T83/5787; Y10T83/5805; Y10T83/748; Y10T83/7487; Y10T83/7493; Y10T83/7573; Y10T83/758
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A saw, comprising: a saw frame, a saw blade movably mounted in the saw frame, a clamping device, including a stationary lower jaw, an upper jaw rockable about a horizontal axis, and a bearing surface for supporting workpieces to be divided by the saw, a stationary abutment at the beginning of the saw blade advance, and a second abutment at the end of the saw blade advance, said second abutment being lowerable from above and horizontally displaceable for passing the workpieces against the stationary abutment, and the axis of oscillation of the upper jaw being arranged in about the plane defined by the upper edge of the workpieces and in the direction of saw blade advance befoRe the stationary abutment.
Claim 2
Dependent Claim
120 words
A saw, comprising: a saw frame, a saw blade movably mounted in the saw frame, a clamping device, including a stationary lower jaw, an upper jaw rockable about a horizontal axis, and a bearing surface for supporting workpieces to be divided by the saw, a stationary abutment at the beginning of the saw blade advance, and a second abutment at the end of the saw blade advance, said second abutment being lowerable from above and horizontally displaceable for passing the workpieces against the stationary abutment, and the axis of oscillation of the upper jaw being arranged in about the plane defined by the upper edge of the workpieces and in the direction of saw blade advance befoRe the stationary abutment.
Claim 3
Dependent Claim
24 words
The saw as claimed in claim 1, in which the axis of oscillation is adjustable in a vertical direction for adaptation to the workpieces.
Claim 4
Dependent Claim
219 words
A saw comprising: a saw frame, a saw blade movably mounted in the saw frame, means for positively guiding the saw blade with respect to its forward feeding speed, a clamping device, including a substantially stationary lower jaw, a rockable upper jaw, and a bearing plane for supporting workpieces to be divided by the saw, a stationary abutment so located at the side of the clamping device remote from the saw blade that the clamping device is freely accessible from the other side and also transversely to the direction of motion of the saw, a second abutment, displaceable relatively to the stationary abutment, for urging the workpieces horizontally towards the stationary abutment, so that a so-called drawing of the saw into the material is prevented, and the upper jaw, upon coming into contact with the workpieces, is moving exactly perpendicularly to the bearing plane, a guide extending perpendicularly to the bearing plane, a bearing block movable in said guide, the upper jaw of the clamping device being rockably mounted in said bearing block, and abutments in the bearing block, adapted to limit the rocking movement of the upper jaw to an acute angle, one arm of which is parallel to the bearing plane, so that the upper jaw is adjusted to the height of the workpieces to be cut.
Claim 5
Dependent Claim
219 words
A saw comprising: a saw frame, a saw blade movably mounted in the saw frame, means for positively guiding the saw blade with respect to its forward feeding speed, a clamping device, including a substantially stationary lower jaw, a rockable upper jaw, and a bearing plane for supporting workpieces to be divided by the saw, a stationary abutment so located at the side of the clamping device remote from the saw blade that the clamping device is freely accessible from the other side and also transversely to the direction of motion of the saw, a second abutment, displaceable relatively to the stationary abutment, for urging the workpieces horizontally towards the stationary abutment, so that a so-called drawing of the saw into the material is prevented, and the upper jaw, upon coming into contact with the workpieces, is moving exactly perpendicularly to the bearing plane, a guide extending perpendicularly to the bearing plane, a bearing block movable in said guide, the upper jaw of the clamping device being rockably mounted in said bearing block, and abutments in the bearing block, adapted to limit the rocking movement of the upper jaw to an acute angle, one arm of which is parallel to the bearing plane, so that the upper jaw is adjusted to the height of the workpieces to be cut.
Claim 6
Dependent Claim
126 words
The saw as claimed in claim 3, further comprising: a first power piston for moving the upper jaw, the center of gravity of the contact surface of the upper jaw with the workpieces being located between the point at which said power piston acts on the upper jaw and the axis of oscillation of the upper jaw, and the ratio of the length with which the bearing block is guided in the guide to the distance between the point at which said power piston acts on the upper jaw and the axis of oscillation of the upper jaw being greater than the coefficient of friction between the guide and the bearing block, so that a so-called self-locking of the bearing block in the guide is prevented.
Claim 7
Dependent Claim
36 words
The saw as claimed in claim 3, further comprising: at least one gripping member capable of preventing the said bearing block being pulled downwards by the intrinsic weight of the bearing block and the upper jaw.
Claim 8
Dependent Claim
29 words
The saw as claimed in claim 3, in which said bearing block consists of at least one rod, acting as a guide, and a bushing slidable upon said rod.
Claim 9
Dependent Claim
43 words
The saw as claimed in claim 4, further comprising: a first pushbutton switch mounted on the power piston that moves the upper jaw, and said pushbutton switch being adapted to arrest the upper jaw in its pressing position at a predetermined contact pressure.
Claim 10
Dependent Claim
121 words
The saw as claimed in claim 7, further comprising: means for imparting a feeding movement to the saw blade, a second power piston, for moving the abutment which is displaceable in the upper jaw, a second pushbutton switch, coupled with the first power piston, which acts upon the upper jaw, and with the means for imparting feeding movement to the saw blade, the second power piston being coupled with the first pushbutton switch, so that the workpieces can first be lightly clamped between the upper jaw and the lower jaw of the clamping device, and can then be pressed by the displaceable abutment against the stationary abutment, before they undergo their final clamping between the upper jaw and the lower jaw.
Claim 11
Dependent Claim
237 words
A saw comprising: a saw frame, a saw blade movably mounted in the saw frame, means for positively guiding the saw blade with respect to its forward feeding speed, a clamping device, including a substantially stationary lower jaw, a rockable upper jaw, and a bearing plane for supporting workpieces to be divided by the saw, a stationary abutment so located at the side of the clamping device remote from the saw blade that the clamping device is freely accessible from the other side and also transversely to the directIon of motion of the saw, a second abutment, displaceable relatively to the stationary abutment, for urging the workpieces horizontally towards the stationary abutment, so that a so-called drawing of the saw into the material is prevented, and the upper jaw, upon coming into contact with the workpieces, is moving exactly perpendicularly to the bearing plane, at least two power pistons pivotally connected with the saw blade for imparting a feeding movement to the saw blade, means for applying fluid pressure to the piston face of one of the power pistons, at least one flow and throttle valve, means for loading the annular surfaces of both said power pistons with pressure derived from the resistance of said flow and throttle valve, so that the saw is braked by the increasing resistance of the flow and throttle valve if a pulling action occurs upon the so-called drawing into the material.
Claim 12
Dependent Claim
237 words
A saw comprising: a saw frame, a saw blade movably mounted in the saw frame, means for positively guiding the saw blade with respect to its forward feeding speed, a clamping device, including a substantially stationary lower jaw, a rockable upper jaw, and a bearing plane for supporting workpieces to be divided by the saw, a stationary abutment so located at the side of the clamping device remote from the saw blade that the clamping device is freely accessible from the other side and also transversely to the directIon of motion of the saw, a second abutment, displaceable relatively to the stationary abutment, for urging the workpieces horizontally towards the stationary abutment, so that a so-called drawing of the saw into the material is prevented, and the upper jaw, upon coming into contact with the workpieces, is moving exactly perpendicularly to the bearing plane, at least two power pistons pivotally connected with the saw blade for imparting a feeding movement to the saw blade, means for applying fluid pressure to the piston face of one of the power pistons, at least one flow and throttle valve, means for loading the annular surfaces of both said power pistons with pressure derived from the resistance of said flow and throttle valve, so that the saw is braked by the increasing resistance of the flow and throttle valve if a pulling action occurs upon the so-called drawing into the material.
Claim 13
Dependent Claim
80 words
The saw as claimed in claim 8, further comprising at least two power pistons pivotally connected with the saw blade for imparting a feeding drive to the saw blade, a common hydraulic circuit controlling all the power pistons, a one-way valve controlling the admission of pressure liquid to the annular surface of the piston that moves the upper jaw, and two-way valves controlling the admission of pressure liquid to all the other piston faces and annular surfaces of the pistons.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |