Joints and connections – With distinct fluid or article handling or directing feature
Reexamination Certificate
2011-05-17
2011-05-17
MacArthur, Victor (Department: 3679)
Joints and connections
With distinct fluid or article handling or directing feature
C403S037000, C403S353000
Reexamination Certificate
active
07942600
ABSTRACT:
A passage block coupling apparatus including a bolt insertion hole13and a pin insertion hole14formed in an upper-stage passage block3, a screw hole15and a non-screw hole16that are formed in a lower-stage passage block4, a bolt11that is inserted into the bolt insertion hole13, and threaded with the screw hole15, and a positioning pin12that is inserted to the pin insertion hole14, with its lower end portion being fitted to the non-screw hole16. A cut-out section17is formed near the lower end portion of the positioning pin12, and a protruding portion18to be fitted to the cut-out section17is formed on the opening portion of the non-screw hole16. A tightening force exerted by the bolt11and a force exerted by the lower end portion of the positioning pin12to press the protruding portion18of the non-screw hole16upward are balanced with each other so that an evenly fastened state is achieved so that the passage blocks3and4are coupled with each other.
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Edwards Angell Palmer & & Dodge LLP
Macarthur Victor
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