Patent ID: 11897090
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An apparatus, comprising:
a shaft extending in a shaft length axis direction between proximal and distal shaft ends, the shaft having a length in excess of about three feet;
a lever associated with the shaft to apply a torque to the shaft at a location spaced apart from the distal shaft end;
a wrench comprising: a housing defining a volume between a distal face and a proximal face;
a plurality of parallel bores distributed in the volume to dispose a distal end of each bore as an opening communicating through the distal face;
a plurality of fingers, at least one finger of the fingers comprising a working end and a held portion, the working end being configured and arranged to protrude distally beyond the distal face to a desired extended position, the held portion to fit in registration inside one of the bores for reciprocal displacement parallel to a bore length axis;
a plurality of stop elements, at least one stop element of the stop elements to resist displacement of the working end of the at least one finger in a distal direction beyond the desired extended position; and
a plurality of biasing elements, at least one biasing element of the biasing elements to urge motion of the at least one finger in a distal direction, wherein:
the at least one finger comprises a cylindrical held portion having a first diameter and a cylindrical working end having a second diameter, the first diameter being greater than the second diameter, a first shoulder disposed between the first diameter and the second diameter; and
the at least one stop element comprises a protrusion disposed in one of the bores to form a structural interference between the first shoulder and the protrusion; and
the housing comprises a distal wall associated with the distal face and a proximal wall associated with the proximal face, the distal and proximal walls to capture a full complement of installed fingers and biasing elements inside the housing and in registration for reciprocal displacement along respective bore length axes during assembly of the housing; wherein:
the bores are arrayed to dispose distal ends of adjacent fingers in a spaced apart relationship to resist transverse load transfer from a load-carrying finger to an adjacent finger; and
a distal wrench end configured and arranged to variably couple with a handle of a stop and waste valve to variably dispose the lever at a corresponding plurality of user perceptible lever orientations clocked at discrete increments about the shaft length axis; and
an attachment mechanism configured to couple the wrench in operable association with the distal shaft end.