US3757642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing mechanism for pivoted member
Assignee: Charles Machine Works Inc
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Filing: 1971-11-24
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Granted: 1973-09-11
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Expires: 1991-11-24
Abstract
Abstract A backhoe mounted on a wheeled vehicle and having a mechanism for swinging the backhoe boom structure to positions on either side of a central axis. The swing mechanism comprises a pair of expansible chamber motors and a valve means associated with each motor for controlling the flow of pressurized fluid thereto. Each motor is pivotally connected at one end to the vehicle frame and at the other end to the boom structure. Each valve means comprises a valve body fixedly attached to the vehicle frame and having a valve chamber with suitable connections to the source of pressurized fluid and the motor, a rotatable valve partition in the valve chamber, and an actuator arm for rotating the partition pivotally attached to the respective motor. As the motors opeate to swing the boom, pivotal movement of each motor results in coordinated rotation of the valve partitions to control the flow of pressurized fluid through each of the valves.
Inventors
- 👤 K Schuermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:30
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
441 words
A swing mechanism for moving a pivoted member to positions on either side of a central axis comprising: a frame upon which said member is pivotally mounted by a first pivotal connection on said central axis, the axis of said member also passing through said first pivotal connection, second and third pivotal connections on said member spaced from said first pivotal connection and on opposite sides of said member axis, fourth and fifth pivotal connections on said frame spaced from said first pivotal connection and on opposite sides of said central axis, first and second expansible chamber motors, each of said motors comprising a motor cylinder element having fluid ports at the opposite ends thereof and a motor piston element having a piston rod extending out of said cylinder element, said first motor having one of said motor elements pivotally connected to said member at said second pivotal connection and the other of said motor elements pivotally connected to said frame at said fourth pivotal connection, said second motor having one of said motor elements pivotally connected to said member at said third pivotal connection and the other of said motor elements pivotally connected to said frame at said fourth pivotal connection, said second motor having one of said motor elements pivotally connected to said member at said third pivotal connection and the other of said motor elements pivotally connected to said frame at said fifth pivotal connection, first and second valve means associated respectively with each of said first and second motors for controlling the flow of pressurized fluid through each of said motors, each of said valve means comprising a valve body element and a valve actuating element, each said Valve body element comprising a pair of first valve ports in communication with a pressurized fluid supply system and a pair of second valve ports in communication with said two cylinder ports respectively, and a valve chamber in said valve body, said first and second valve ports also being in communication with said valve chamber, each said valve actuating element comprising a rotatable valve member mounted in said valve chamber and having partition means for dividing said chamber into two portions to selectively control the flow of pressurized fluid through said valve ports, and an actuator arm connected to said valve member to rotate said valve member, each said valve body element being fixedly attached to said frame and each said valve actuating element being pivotally connected to the respective one of said motors such that each said valve member is moved in response to pivotal movement of the respective one of said motors with respect to said frame.
Claim 2
Dependent Claim
441 words
A swing mechanism for moving a pivoted member to positions on either side of a central axis comprising: a frame upon which said member is pivotally mounted by a first pivotal connection on said central axis, the axis of said member also passing through said first pivotal connection, second and third pivotal connections on said member spaced from said first pivotal connection and on opposite sides of said member axis, fourth and fifth pivotal connections on said frame spaced from said first pivotal connection and on opposite sides of said central axis, first and second expansible chamber motors, each of said motors comprising a motor cylinder element having fluid ports at the opposite ends thereof and a motor piston element having a piston rod extending out of said cylinder element, said first motor having one of said motor elements pivotally connected to said member at said second pivotal connection and the other of said motor elements pivotally connected to said frame at said fourth pivotal connection, said second motor having one of said motor elements pivotally connected to said member at said third pivotal connection and the other of said motor elements pivotally connected to said frame at said fourth pivotal connection, said second motor having one of said motor elements pivotally connected to said member at said third pivotal connection and the other of said motor elements pivotally connected to said frame at said fifth pivotal connection, first and second valve means associated respectively with each of said first and second motors for controlling the flow of pressurized fluid through each of said motors, each of said valve means comprising a valve body element and a valve actuating element, each said Valve body element comprising a pair of first valve ports in communication with a pressurized fluid supply system and a pair of second valve ports in communication with said two cylinder ports respectively, and a valve chamber in said valve body, said first and second valve ports also being in communication with said valve chamber, each said valve actuating element comprising a rotatable valve member mounted in said valve chamber and having partition means for dividing said chamber into two portions to selectively control the flow of pressurized fluid through said valve ports, and an actuator arm connected to said valve member to rotate said valve member, each said valve body element being fixedly attached to said frame and each said valve actuating element being pivotally connected to the respective one of said motors such that each said valve member is moved in response to pivotal movement of the respective one of said motors with respect to said frame.
Claim 3
Dependent Claim
30 words
The swing mechanism of claim 1 wherein said second and third pivotal connections are equally spaced from said first pivotal connection and are at equal angles from said member axis.
Claim 4
Dependent Claim
30 words
The swing mechanism of claim 1 wherein said fourth and fifth pivotal connections are equally spaced from said first pivotal connections and are at equal angles from said central axis.
Claim 5
Dependent Claim
33 words
The swing mechanism of claim 1 wherein said fourth and fifth pivotal connections are a greater distance from said central axis than are said second and third pivotal connections from said member axis.
Claim 6
Dependent Claim
25 words
The swing mechanism of claim 1 wherein said first, second and third pivotal connections are disposed on a straight line perdendicular to said member axis.
Claim 7
Dependent Claim
19 words
The swing mechanism of claim 1 wherein the pivot axes of said pivotal connections are parallel to one another.
Claim 8
Dependent Claim
24 words
The swing mechanism of claim 1 wherein said cylinder elements are attached to said frame and said piston rods are attached to said member.
Claim 9
Dependent Claim
34 words
The swing mechanism of claim 1 wherein said first valve ports are opposite one another and said second valve ports are opposite one another and at substantially right angles to said first valve ports.
Claim 10
Dependent Claim
38 words
The swing mechanism of claim 1 wherein said partition is of a width at least equal to the width of each of said first valve ports whereby said partition means seals said first valve ports when aligned therewith.
Claim 11
Dependent Claim
31 words
The swing mechanism of claim 9 wherein said partition means seals said first valve ports when said pivotal connections of the respective said motor are aligned with said first pivotal connection.
Claim 12
Dependent Claim
53 words
The swing mechanism of claim 1 wherein the axis of rotation of said partition means and the axis of rotation of said pivotal connections of its respective said motor are parallel, and wherein said actuation arm is pivotally connected with the pivot axis parallel to the axis of rotation of said partition means.
Claim 13
Dependent Claim
27 words
The swing mechanism of claim 1 wherein said valve bodies are in a plane spaced from and parallel to the planes of pivotal movement of said motors.
Claim 14
Dependent Claim
317 words
An earthworking machine comprising: a vehicle having a frame, an earth working implement pivotally mounted on said vehicle at a first pivotal connection and movable to positions on either side of a central axis passing through said first pivotal connection, said implement having an axis also passing through said first pivotal connection. second and third pivotal connections on said implement on opposite sides of said implement axis, said second and third pivotal connections being equally spaced from said first pivotal connection and at equal angles from said implement axis, fourth and fifth pivotal connections on said vehicle frame on opposite sides of said central axis, said fourth and fifth pivotal connections being equally spaced from said first pivotal connection and at equal angles from said central axis, first and second expansible chamber motors pivotally connected respectively between said second and fourth pivotal cOnnections and between said third and fifth pivotal connections, each said motor having a double acting piston element operating in a cylinder element having pressurized fluid ports at opposite ends, first and second valve means associated respectively with said first and second motors, each of said valve means comprising a valve body element and a valve actuating element, each said valve body element being fixedly attached to said vehicle frame and comprising a central chamber, a first pair of valve ports communicating with said chamber and with a source of pressurized fluid, and a second pair of valve ports communicating with said chamber and with said cylinder ports, and each said valve actuating element comprising a valve member rotatably mounted in said chamber and having partition means for dividing said chamber into two portions to control the flow of fluid through said valve ports, and a valve actuator attached to said valve element and pivotally attached to its respective said motor to rotate said valve member in response to pivotal movement of said respective motor.
Claim 15
Dependent Claim
317 words
An earthworking machine comprising: a vehicle having a frame, an earth working implement pivotally mounted on said vehicle at a first pivotal connection and movable to positions on either side of a central axis passing through said first pivotal connection, said implement having an axis also passing through said first pivotal connection. second and third pivotal connections on said implement on opposite sides of said implement axis, said second and third pivotal connections being equally spaced from said first pivotal connection and at equal angles from said implement axis, fourth and fifth pivotal connections on said vehicle frame on opposite sides of said central axis, said fourth and fifth pivotal connections being equally spaced from said first pivotal connection and at equal angles from said central axis, first and second expansible chamber motors pivotally connected respectively between said second and fourth pivotal cOnnections and between said third and fifth pivotal connections, each said motor having a double acting piston element operating in a cylinder element having pressurized fluid ports at opposite ends, first and second valve means associated respectively with said first and second motors, each of said valve means comprising a valve body element and a valve actuating element, each said valve body element being fixedly attached to said vehicle frame and comprising a central chamber, a first pair of valve ports communicating with said chamber and with a source of pressurized fluid, and a second pair of valve ports communicating with said chamber and with said cylinder ports, and each said valve actuating element comprising a valve member rotatably mounted in said chamber and having partition means for dividing said chamber into two portions to control the flow of fluid through said valve ports, and a valve actuator attached to said valve element and pivotally attached to its respective said motor to rotate said valve member in response to pivotal movement of said respective motor.
Claim 16
Dependent Claim
33 words
The earthworking machine of claim 13 wherein said fourth and fifth pivotal connections are a greater distance from said central axis than are said second and third pivotal connections from said implement axis.
Claim 17
Dependent Claim
31 words
The earthworking machine of claim 13 wherein the pivot axes of said pivotal connections are parallel to one another and are perpendicular to the planes of pivotal movement of said motors.
Claim 18
Dependent Claim
24 words
The earthworking machine of claim 13 wherein said cylinder elements are attached to said frame and said piston rods are attached to said implement.
Claim 19
Dependent Claim
45 words
The earthworking machine of claim 13 wherein said valve chamber is of circular cross section and wherein said first valve ports are substantially opposite one another and said second valve ports are substantially opposite one another and at right angles to said first valve ports.
Claim 20
Dependent Claim
37 words
The earthworking machine of claim 13 wherein said partition is of a width at least equal to the width of each of said first valve ports whereby said partition seals said first valve ports when aligned therewith.
Claim 21
Dependent Claim
30 words
The earthworking machine of claim 18 wherein said partition seals said first valve ports when said pivotal connections of the said respective motors are aligned with said first pivotal connection.
Claim 22
Dependent Claim
33 words
The earthworking machine of claim 13 wherein the axis of rotation of each said valve member is parallel to the pivot axis of the pivotal connection of said actuator arm to said motor.
Claim 23
Dependent Claim
39 words
The earthworking machine of claim 13 wherein each said valve body lies within the region defined by two planes perpendicular to the plane of pivotal movement of its respective said motor and defining the limits of said pivotal movement.
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |