STEPPING MOTOR DRIVE APPARATUS, GEAR PUMP, AND STEPPING MOTOR-DRIVEN GEAR PUMP SYSTEM
First Claim
1. A gear pump system, comprising:
- a gear pump configured to receive a rotational input, the gear pump including;
a drive shaft defining a first end portion and a second end portion, wherein the first end portion of the drive shaft is configured to receive the rotational input to rotate the drive shaft;
an enclosure defining a chamber and including a fluid input and a fluid output, wherein the second end portion of the drive shaft extends through the enclosure into the chamber;
a drive gear engaged about the second end portion of the drive shaft within the chamber;
a passive shaft rotatably mounted within the chamber; and
a passive gear engaged about the passive shaft within the chamber and disposed in meshed engagement with the drive gear, wherein rotation of the drive gear rotates the passive gear to urge fluid from the fluid input towards the fluid output,wherein the second end portion of drive shaft is rotatably and sealingly engaged with the enclosure at first and second locations via first and second ball bearing assemblies.
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Accused Products
Abstract
A stepping motor-driven system includes a stepping motor, an output device, and a belt and pulley system operably coupling the stepping motor with the output device to impart rotation therebetween. The belt and pulley system includes an input pinion engaged with the stepping motor, an output pinion engaged with the output device, and a timing belt. The timing belt is disposed about the input and output pinions, inhibits elongation, and defines a plurality of spaced-apart grooves on an inwardly-facing surface thereof that are wider than the teeth of the pinions and are configured to receive the teeth of the pinions in meshed engagement therewith. As a result, a gap is defined within each groove. The gaps permit backlash of the timing belt in response to changes in a rotational speed input to the belt and pulley system from the stepping motor, thereby inhibiting loss of control.
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19 Claims
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1. A gear pump system, comprising:
a gear pump configured to receive a rotational input, the gear pump including; a drive shaft defining a first end portion and a second end portion, wherein the first end portion of the drive shaft is configured to receive the rotational input to rotate the drive shaft; an enclosure defining a chamber and including a fluid input and a fluid output, wherein the second end portion of the drive shaft extends through the enclosure into the chamber; a drive gear engaged about the second end portion of the drive shaft within the chamber; a passive shaft rotatably mounted within the chamber; and a passive gear engaged about the passive shaft within the chamber and disposed in meshed engagement with the drive gear, wherein rotation of the drive gear rotates the passive gear to urge fluid from the fluid input towards the fluid output, wherein the second end portion of drive shaft is rotatably and sealingly engaged with the enclosure at first and second locations via first and second ball bearing assemblies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
Specification