High efficiency, high pressure pump suitable for remote installations and solar power sources

A pump head, comprising:

• a motor coupler having a coupling body and a motor connection sleeve, said motor connection sleeve configured to detachably couple with a rotary motor shaft, said rotary motor shaft defining a motor shaft rotary axis;
• a motor mount;
• at least one piston housing;
• a fluid input;
• a fluid output;
• and
• a reciprocating piston within said piston housing and in a fluid flow path between said fluid input and said fluid output configured to pump a fluid from said fluid input to said fluid output;
• said motor mount having a first mounting flange which is configured to couple said pump head to a motor;
• said first mounting flange having
• a motor mounting bolt having a longitudinal axis parallel to said motor shaft rotary axis and perpendicular to an axis along which said reciprocating piston reciprocates, said motor mounting bolt passing through said first mounting flange and configured to securely affix to said motor,
• a first coupling to which a torsion bolt is engaged,
• a torsion sleeve coupled with and extending from said first coupling on a first end of said torsion sleeve, said torsion sleeve extending longitudinally along an axis perpendicular to said motor mounting bolt and radially out from said motor connection sleeve, and
• an elastomeric sleeve internal to and longitudinally co-extensive with said torsion sleeve,
• said torsion bolt having an enlarged head end engaged with said elastomeric sleeve, a shaft extending from within said torsion sleeve, and a threaded end distal to said enlarged head end secured with and extending from said coupling body, said torsion bolt configured to longitudinally compress and thereby urge a radial expansion of said elastomeric sleeve when said torsion bolt is driven into said coupling body to thereby firm a connection between said first mounting flange and said coupling body, said elastomeric sleeve isolating said torsion bolt from said torsion sleeve.