Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
291 words
An improved earthworking implement comprising: a frame, a standard, pivotal means to pivotally attach the standard to the frame, an earthworking tool attached to the lower portion of the standard, a first stop means on the implement to limit downward movement of the standard, a second stop means on the implement to limit upward movement of the standard, a spring trip device to position the standard in a lower working position, to absorb energy, and to release and allow the earthworking tool to move to the rear when the earthworking tool strikes an obstruction characterized by; first and second bar assemblies, at least one of which is a resilient means, pin means to pivotally attach the first bar assembly to the frame for pivotal movement about a first axis, pin means to pivotally attach the second bar assembly to the standard for pivotal movement about a second axis which is in the same plane as the first axis, pin means for pivotally attaching the first bar assembly to the second bar assembly for pivotal movement relative to the second bar assembly about an axis which is parallel to and spaced to one side of the plane containing the first axis and the second axis when the standard is in the working position, stop means to limit movement of the pin means, for attaching the first bar assembly to the second bar assembly, away from the plane containing the first and second axis when the standard is in the working position, and abutment surfaces on the bar assemblies to limit pivotal movement of the first bar assembly relative to the second bar assembly about the axis of the pin means for pivotally attaching the first bar assembly to the second bar assembly.
Claim 2
Dependent Claim
291 words
An improved earthworking implement comprising: a frame, a standard, pivotal means to pivotally attach the standard to the frame, an earthworking tool attached to the lower portion of the standard, a first stop means on the implement to limit downward movement of the standard, a second stop means on the implement to limit upward movement of the standard, a spring trip device to position the standard in a lower working position, to absorb energy, and to release and allow the earthworking tool to move to the rear when the earthworking tool strikes an obstruction characterized by; first and second bar assemblies, at least one of which is a resilient means, pin means to pivotally attach the first bar assembly to the frame for pivotal movement about a first axis, pin means to pivotally attach the second bar assembly to the standard for pivotal movement about a second axis which is in the same plane as the first axis, pin means for pivotally attaching the first bar assembly to the second bar assembly for pivotal movement relative to the second bar assembly about an axis which is parallel to and spaced to one side of the plane containing the first axis and the second axis when the standard is in the working position, stop means to limit movement of the pin means, for attaching the first bar assembly to the second bar assembly, away from the plane containing the first and second axis when the standard is in the working position, and abutment surfaces on the bar assemblies to limit pivotal movement of the first bar assembly relative to the second bar assembly about the axis of the pin means for pivotally attaching the first bar assembly to the second bar assembly.
Claim 3
Dependent Claim
51 words
The improved earthworking implement of claim 1 characterized by said stop means, to limit movement of the pin means for attaching the first bar assembly to the second bar assembly, away from the plane containing the first and second axis when the standard is in the working position, including adjustment means.
Claim 4
Dependent Claim
20 words
The improved earthworking implement of claim 1 characterized by at least one of the bar assemblies including a leaf spring.
Claim 5
Dependent Claim
54 words
The improved earthworking implement of claim 3 characterized by the pin means for pivotally attaching the first bar assembly to the second bar assembly having a longitudinal axis spaced to one side of a plane through the longitudinal center of the leaf spring and capable of exerting a bending moment on the leaf spring.
Claim 6
Dependent Claim
60 words
The improved earthworking implement of claim 3 characterized by the pin means, for pivotally attaching the first bar assembly to the frame and the second bar assembly to the standard, having longitudinal axes spaced to one side of a plane through the longitudinal center of the adjacent leaf spring and capable of exerting a bending moment on the leaf spring.
Claim 7
Dependent Claim
36 words
The improved earthworking implement of claim 1 characterized bY at least one of the bar assemblies including length adjusting means on at least one of its ends capable of changing the length of the bar assembly.
Claim 8
Dependent Claim
54 words
The improved earthworking implement of claim 1 characterized by the abutment surfaces, to limit pivotal movement of the first bar assembly relative to the second bar assembly, including abutment surfaces on the first and second bar assemblies which are spaced from each other when the spring trip device is in an unloaded earthworking position.
Claim 9
Dependent Claim
65 words
The improved earthworking implement of claim 7 characterized by a cantilever beam attached to one of the bar assemblies, extending across the space between the abutment surfaces on the first and second bar assemblies when the spring trip device is in an earthworking position, and a surface on the cantilever beam attached to one of the bar assemblies capable of engaging the other bar assembly.
Claim 10
Dependent Claim
24 words
The improved earthworking implement of claim 8 characterized by adjustment means to adjust the force which the cantilevered beam exerts on the bar assemblies.