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US 2022/0299017 A1Published application
System for dispensing abrasive material
AssigneeGraco Minnesota Inc.
InventorsSteven R. Sinders, John R. Scopelite
Life of this patent
Estimating the term…
Abstract
A system for dispensing abrasive materials includes a transfer pump configured to pump abrasive material to a metering pump configured to pump the abrasive material to an application. Dynamic interfaces within the pumps are at least partially formed by sleeved components of the pump interfacing with a seal configured to engage with the sleeved surface during relative movement between the sleeved surface and the seal. The smooth exterior surfaces of the sleeves interface with the seals to prevent abrasive particulate in the material from adhering to the sleeve, preventing the abrasive particulate from being pulled between the sleeve and the seal.
Claims20
A pump for pumping an abrasive material, the pump comprising:
- a pump body;
- a first seal supported by the pump body;
- a piston at least partially disposed within the pump body and configured to reciprocate along a pump axis;
- a first piston sleeve mounted on the piston, wherein the first piston sleeve interfaces with the first seal during reciprocation of the piston;
- a second piston sleeve mounted on the piston and spaced axially from the first piston sleeve along the piston;
- and
- an intake valve disposed within the pump body, wherein the intake valve includes an intake seal assembly disposed on the piston, wherein the intake seal assembly interfaces with the second piston sleeve during reciprocation of the piston, and wherein the intake valve is actuatable between an open state with the intake seal assembly disengaged from an intake seat and a closed state with the intake seal assembly engaged with the intake seat.
4 more elements
A pump for pumping an abrasive material, the pump comprising:
- a pump body comprising:
- an intake housing;
- a valve housing mounted to the intake housing;
- a pump cylinder mounted to an end of the valve housing opposite the intake housing;
- an outlet housing mounted to an end of the pump cylinder opposite the valve housing;
- and
- a throat cartridge mounted to an end of the outlet housing opposite the pump cylinder.
- a first seal supported by the throat cartridge;
- a piston at least partially disposed within the pump body and configured to reciprocate along a pump axis;
- a first piston sleeve mounted on the piston, wherein the first piston sleeve interfaces with the first seal during reciprocation of the piston;
- a second piston sleeve mounted on the piston and spaced axially from the first piston sleeve along the piston;
- a cylinder sleeve mounted to the pump cylinder such that an interior radial surface is exposed within a material flowpath through the pump body;
- an intake valve disposed within the pump body, wherein the intake valve includes an intake seal assembly disposed on the piston, wherein the intake seal assembly interfaces with the second piston sleeve during reciprocation of the piston, and wherein the intake valve is actuatable between a first open state with the intake seal assembly disengaged from an intake seat and a first closed state with the intake seal assembly engaged with the intake seat;
- and
- a piston valve disposed within the pump body, wherein the piston valve includes a piston seal assembly disposed on the piston, wherein the piston seal assembly interfaces with the cylinder sleeve during reciprocation of the piston, and wherein the piston valve is actuatable between a second open state with the piston seal assembly disengaged from a piston valve seat and a second closed state with the piston seal assembly engaged with the piston valve seat.
12 more elements
A pump for pumping an abrasive material, the pump comprising:
- a pump body;
- a first seal supported by the pump body;
- a cylinder sleeve supported by the pump body;
- a piston at least partially disposed within the pump body and configured to reciprocate along a pump axis;
- a piston sleeve mounted on the piston, wherein the first piston sleeve interfaces with the first seal during reciprocation of the piston;
- and
- a piston seal mounted on the piston and interfacing with the cylinder sleeve, wherein the piston seal is an only portion of the piston interfacing with the cylinder sleeve during reciprocation of the piston.
4 more elements
A pumping system for pumping abrasive material, the pumping system comprising:
- a transfer pump configured to draw material from a vessel and pump the material downstream through a first conduit, the transfer pump comprising:
- a transfer pump body;
- a first transfer seal supported by the transfer pump body;
- a transfer piston at least partially disposed within the transfer pump body and configured to reciprocate along a transfer pump axis;
- a first transfer piston sleeve mounted on the transfer piston, wherein the first transfer piston sleeve interfaces with the first transfer seal during reciprocation of the transfer piston;
- a second transfer piston sleeve mounted on the transfer piston and spaced axially from the first transfer piston sleeve along the transfer piston;
- and
- an intake valve disposed within the pump body, wherein the intake valve includes an intake seal assembly disposed on the transfer piston, wherein the intake seal assembly interfaces with the second transfer piston sleeve during reciprocation of the transfer piston, and wherein the intake valve is actuatable between an open state with the intake seal assembly disengaged from an intake seat and a closed state with the intake seal assembly engaged with the intake seat;
- and
- a metering pump connected to the first conduit to receive the material from the transfer pump, the metering pump configured to pump the material downstream through a downstream conduit to an applicator, the metering pump comprising:
- a metering pump body;
- a first metering seal supported by the metering pump body;
- a metering cylinder sleeve supported by the metering pump body;
- a metering piston at least partially disposed within the metering pump body and configured to reciprocate along a metering pump axis;
- a metering piston sleeve mounted on the metering piston, wherein the metering piston sleeve interfaces with the first metering seal during reciprocation of the metering piston;
- and
- a metering piston seal mounted on the metering piston and interfacing with the metering cylinder sleeve, wherein the metering piston seal is an only portion of the metering piston interfacing with the metering cylinder sleeve during reciprocation of the metering piston.
14 more elements
Dependencies are inferred from the claim text.