Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
A cutting assembly having at least one nozzle for directing a coolant to the work area, the coolant supply being dependent on the application of pressure to the assembly, the assembly comprising a cap-shaped cutting bit, a bit holder having a shaft to receive said bit, the bit being capable of limited axial movement on said shaft, a shutoff valve for the coolant within said shaft, a coupling member connecting the valve with the bit such that the valve opens on axial movement of the bit when cutting pressure is applied.
Claim 2
Dependent Claim
91 words
A cutting assembly having at least one nozzle for directing a coolant to the work area, the coolant supply being dependent on the application of pressure to the assembly, the assembly comprising a cap-shaped cutting bit, a bit holder having a shaft to receive said bit, the bit being capable of limited axial movement on said shaft, a shutoff valve for the coolant within said shaft, a coupling member connecting the valve with the bit such that the valve opens on axial movement of the bit when cutting pressure is applied.
Claim 3
Dependent Claim
17 words
A cutting assembly according to claim 1 wherein the coolant nozzle is positioned adjacent the cutting bit.
Claim 4
Dependent Claim
25 words
A cutting assembly according to claim 1 wherein a coolant supply passage is provided within the shaft to communicate the valve with a coolant supply.
Claim 5
Dependent Claim
26 words
A cutting assembly according to claim 1 wherein the valve is urged in the closed position by a spring acting against the shaft and the valve.
Claim 6
Dependent Claim
67 words
A cutting assembly as claimed in claim 1, characterized in that the shutoff valve becomes closed in the direction of the acting cutting pressure and that the bit shaft has a central bore within which a push rod forming the coupling member is guided for axial movement, said push rod acting on a movable closure member of the valve and preferably being integral with said closure member.
Claim 7
Dependent Claim
33 words
A cutting assembly as claimed in claim 5, characterized in that the push rod is axially guided within the bore of the bit shaft and within a guide bore of the valve housing.
Claim 8
Dependent Claim
41 words
A cutting assembly as claimed in claim 5, characterized in that a slotting ring is inserted between the push rod and the guide bore of the valve housing, the slit of said slotted ring providing a flow passage for the water.
Claim 9
Dependent Claim
25 words
A cutting assembly as claimed in claim 1, characterized in that a tubular valve housing is inserted into a central bore of the bit shaft.
Claim 10
Dependent Claim
102 words
A cutting assembly for a rock-cutting machine comprising: a bit shaft inserted into and supported by a bit holder; a cap-shaped bit mounted around said bit shaft for rotation relative to said shaft and for limited axial movement relative to said shaft, said shaft having a bore within which is located a normally closed coolant control valve; means within said bore responsive to axial movement to said bit upon application of cutting pressure to said bit for opening said valve; and coolant passage means for supplying coolant to said valve and for conducting coolant from said valve, when open, to said nozzle.
Claim 11
Dependent Claim
102 words
A cutting assembly for a rock-cutting machine comprising: a bit shaft inserted into and supported by a bit holder; a cap-shaped bit mounted around said bit shaft for rotation relative to said shaft and for limited axial movement relative to said shaft, said shaft having a bore within which is located a normally closed coolant control valve; means within said bore responsive to axial movement to said bit upon application of cutting pressure to said bit for opening said valve; and coolant passage means for supplying coolant to said valve and for conducting coolant from said valve, when open, to said nozzle.
Claim 12
Dependent Claim
60 words
A cutting assembly as in claim 9 wherein said means for opening said valve includes a push rod having an outer end in engagement with said bit and a spring biasing said push rod and bit in an outward direction whereby application of cutting pressure to said bit moves said push rod inwardly against the bias force of the spring.
Claim 13
Dependent Claim
20 words
A cutting assembly as in claim 10 wherein said valve includes a movable closure member integral with said push rod.