Pressurized density measuring apparatus

An apparatus for measuring density of a fluid in either a pressurized or a non-pressurized state, comprising:

• a balance arm;
• a fulcrum means for supporting said balance arm;
• a balance weight slidably disposed on said balance arm;
• a first non-pressurized container means having a fixed volume for holding said fluid to measure the density thereof in a non-pressurized state, said first container means being attached to an end of said balance arm;
• and
• a removable pressurizable second container means, received in said first container means, for holding said fluid to measure the density thereof in a pressurized state, said second container means having a fixed volume equal to said fixed volume of said first container means.

An apparatus for measuring density of a fluid in a pressurized state, comprising:

• a pressurizable container means for holding said fluid, said container means having a valve bore disposed therethrough;
• a pump means for supplying pressurized fluid to said container means;
• and
• a valve member threadedly engaged with an internally threaded part of said valve bore, said valve member having a fluid passage means disposed therethrough for selectively communicating said pump means with an interior of said container means, said valve member being movable, upon rotation thereof relative to said container means, between an open position wherein said fluid passage means is communicated with said interior of said container means and a closed position wherein said fluid passage means is isolated from said interior of said container means.

An apparatus for measuring density of a fluid in a pressurized state, comprising:

• a container means for holding said fluid;
• a cover means, connected to said container means and including a piston member closely received within said container means so that said container means and said piston member define a closed pressurizing chamber, said piston member being longitudinally movable to an inwardmost position relative to said container means at which inwardmost position said pressurizing chamber has a fixed volume;
• and
• a pressure regulating means, communicated with said pressurizing chamber, for relieving fluid pressure in said pressurizing chamber in excess of a predetermined pressure.

An apparatus for measuring density of a fluid in a pressurized state, comprising:

• a balance arm;
• a fulcrum means for supporting said balance arm;
• a balance weight slidably disposed on said balance arm;
• a pressurizable container means, disposed on said balance arm, for holding said fluid;
• valve means, connected to said container means, for allowing pressurized fluid to flow into said container means and for retaining said fluid in said container means under pressure;
• pump means for supplying said pressurized fluid to said valve means, said pump means including:
• a pump body having a cylindrical bore disposed therein and an outlet port means for communicating said bore with said valve means;
• and
• a rotatable piston member means, threadedly engaged with said pump body, for pressurizing fluid contained in said bore upon rotation of said piston member means relative to said pump body;
• wherein said container means includes:
• a cup having a closed bottom end and an open top end;
• and
• a cap sealingly connected to said top end of said cup for covering said open top end, said cap having a valve bore disposed therethrough;
• wherein said valve means includes a valve member threadedly engaged with an internally threaded part of said valve bore of said cap, said valve member having a fluid passage means disposed therethrough for selectively communicating said pump means with an interior of said cup, said valve member being movable, upon rotation thereof relative to said cap, between an open position wherein said fluid passage means is communicated with said interior of said cup and a closed position wherein said fluid passage means is isolated from said interior of said cup;
• wherein said valve bore of said cap includes:
• a smaller diameter bore portion located communicated with said interior of said cup;
• a larger diameter bore portion above said smaller diameter bore portion;
• and
• a downwardly tapered annular inner surface connecting said larger and smaller bore portions;
• and
• wherein said valve member includes:
• a smaller outer diameter portion closely received in said smaller diameter bore portion of said cap when said valve member is in its said closed position;
• a larger outer diameter portion closely received in said larger diameter bore portion of said cap;
• a downwardly tapered annular outer surface connecting said larger and smaller outer diameter portions, said fluid passage means having a lower end communicated with said downwardly tapered annular outer surface;
• upper resilient annular sealing means for sealing between said larger outer diameter portion of said valve member and said larger diameter bore portion of said valve bore of said cap;
• and
• lower resilient annular sealing means for sealing between said smaller outer diameter portion of said valve member and said smaller diameter bore portion of said valve bore of said cap when said valve member is in its closed position.

An apparatus for measuring density of a fluid in a pressurized state, comprising:

• a balance arm;
• a fulcrum means for supporting said balance arm;
• a balance weight slidably disposed on said balance arm;
• a pressurizable container means, disposed on said balance arm, for holding said fluid;
• valve means, connected to said container means, for allowing pressurized fluid to flow into said container means and for retaining said fluid in said container means under pressure;
• pump means for supplying said pressurized fluid to said valve means, said pump means including:
• a pump body having a cylindrical bore disposed therein and an outlet port means for communicating said bore with said valve means;
• and
• a rotatable piston member means, threadedly engaged with said pump body, for pressurizing fluid contained in said bore upon rotation of said piston member means relative to said pump body;
• wherein said container means includes:
• a cup having a closed bottom end and an open top end;
• and
• a cap sealingly connected to said top end of said cup for covering said open top end, said cap having a valve bore disposed therethrough;
• wherein said valve means includes a valve member threadedly engaged with an internally threaded part of said valve bore of said cap, said valve member having a fluid passage means disposed therethrough for selectively communicating said pump means with an interior of said cup, said valve member being movable, upon rotation thereof relative to said cap, between an open position wherein said fluid passage means is communicated with said interior of said cup and a closed position wherein said fluid passage means is isolated from said interior of said cup;
• wherein said valve member includes a radially outward extending flange at an upper end thereof with an upper end of said fluid passage means communicating with an upper surface of said flange;
• and
• wherein said apparatus further comprises a coupler means connected to said pump means and including a recess means for closely receiving said flange of said valve member upon insertion of said flange into said recess means in a direction parallel to a plane of said flange so that said pump means is communicated with said fluid passage means when said flange is received in said recess means of said coupler means.