Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
gear pump
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
This concept is defined primarily by its physical mechanism - the presence of gear teeth within a casing that mesh to transport liquid. While it performs the generic pumping function, its identity is given by the specific gear-based mechanism rather than a unique functional differentia.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
PumpingFunction → PumpingProcess ⊑ MomentumTransfer
▼
COPI-Core operation
MomentumTransfer via process parent MomentumTransfer
LLM rationale:
Gear pumps perform the same fundamental function as any pump - adding mechanical energy to liquid to transport it from one location to another. The identity-giving function is the generic PumpingFunction already established for all pumps, not a specialized subtype.
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Expert review
2
Genus Proximus
✓ done
Pump · Assembly
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
Both ISO 15926 and POSC Caesar explicitly classify gear pump as a subtype of pump/rotary pump. The parent_candidates include 'Pump' which is already enriched in our ontology. This is the correct level of specificity - more specific than 'Assembly' but appropriately general for all pump subtypes.
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Expert review
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.GearMechanism ⊓ ∃hasComponentPartAtAllTimes.PumpCasing
▼
Conditions that distinguish
Gear Pump
from sibling classes under genus
Pump.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The defining structural characteristic is the gear mechanism with meshing teeth contained within a casing. This differentiates gear pumps from all other pump types which use different mechanisms (impellers, pistons, screws, etc.). The gear meshing also provides the reverse flow seal capability mentioned in POSC Caesar.
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Expert review
4
Necessary Parts
✓ done
PumpCasing
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These are the minimal necessary components that every gear pump must have - the gear mechanism for pumping action, the casing to contain it, and inlet/outlet ports for fluid flow.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfLiquid → PortionOfLiquid
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Gear pumps take in liquid at lower pressure and discharge it at higher pressure through the positive displacement action of meshing gears. The gear mechanism provides both pumping action and reverse flow sealing.
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Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Gear Pump.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (2)
GEAR PUMP — ClassOfInanimatePhysicalObject
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Gear Pump — Class
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Provenance tiers (2)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 179 · claude-sonnet-4-20250514
Created 2026-04-16 18:11
Updated 2026-09-24 15:22
