Hydraulic motor for use with airless paint sprayer system
AssigneeDurotech Co.
InventorsMiroslav Liska, Anthony Tomsicek
Life of this patent
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Abstract
An improvement in a hydraulic motor for use with an airless paint sprayer system which includes releasable stop means that lock a spool means within said motor to a surrounding sleeve which stop means signal the end of upper and lower strokes of a reciprocating piston associated with said sleeve. In addition, hydraulic fluid anti shock means are provided to prevent the rupture of outlet filter means.
Claims11
An airless paint sprayer system including an engine to pump hydraulic fluid from a tank to a hydraulic motor having a hydraulic system therein with fluid inlet and fluid outlet tubes therein and a paint piston rod plunger suspended therefrom to be placed in a container of paint and reciprocated thereby moving paint through appropriate hoses to a paint discharge spray nozzle, the improvements in said hydraulic motor including:
- a housing including an upper closed end portion and a lower closed end portion, said lower closed end portion having a centrally formed piston receptive passage extending therethrough wherein said passage communicates with the interior of said housing;
- a spool means fixedly mounted in said upper closed end portion and suspended within said housing;
- a slidable sleeve encasing said spool means adapted to move up and down on said spool means;
- a reciprocating hydraulic fluid actuated piston mounted within said housing, extending through said piston receptive passage within said lower closed end portion, said piston surrounds said slidable sleeve and spool means and is capable of moving on an upward and downward stroke during reciprocation;
- a piston cylinder extending between said upper and lower closed end portions surrounding said reciprocating piston and encasing the same whereby a hydraulic fluid chamber is created therein that communicates with said hydraulic system and fluid therein will cause reciprocation of said piston;
- cooperating releasable stop means associated with said spool means and said sleeve adapted to releasably retain said sleeve in one of two locked positions and define the end of each of said upward and downward strokes of said piston;
- and
- linking means suspended from said slidable sleeve which has an at rest position where no linking occurs, and a linked position caused by the downward movement of said piston, when said piston engages a portion of said linking means whereby said linked position causes simultaneous movement of said slidable sleeve and said piston.
A hydraulic motor for use in an airless paint sprayer system wherein said motor is connectable to a paint piston rod pluger adapted to move paint from a container to an area for painting, said motor including:
- a housing including an upper closed end portion and a lower closed end portion, said lower closed end portion having a centrally formed piston receptive passage extending therethrough wherein said passage communicates with the interior of said housing;
- a spool means fixedly mounted in said upper closed end portion and suspended within said housing;
- a slidable sleeve encasing said spool means adapted to move up and down said on spool means;
- a reciprocating hydraulic fluid actuated piston mounted within said housing, extending through said piston receptive passage within said lower closed end portion, said piston surrounds said slidable sleeve and spool means and is capable of moving on an upward and downward stroke during reciprocation;
- a piston cylinder extending between said upper and lower closed end portions surrounding said reciprocating piston and encasing the same whereby a hydraulic fluid chamber is created therein that communicates with said hydraulic system and fluid therein will cause reciprocation of said piston;
- cooperating releasable stop means associated with said spool means and said sleeve adapted to releasably retain said sleeve in one of two locked positions and define the end of each of said upward and downward strokes of said piston;
- and
- linking means suspended from said slidable sleeve which has an at rest position where no linking occurs, and a linked position caused by the downward movement of said piston, when said piston engages a portion of said linking means whereby said linked position causes simultaneous movement of said slidable sleeve and said piston.
Dependencies are inferred from the claim text.