noun
force pump; forcing pump
A pump that uses pressure to force liquid upward, as opposed to a lift pump. Technical term.
この押し上げポンプは井戸から水をくみ上げるのに使われる。
This force pump is used to draw water from a well.
Standard kanji spelling for this compound noun.
Variant spelling with 押上げ instead of 押し上げ; less common but still used.
吸い上げポンプ is a suction/lift pump that draws liquid up by creating a vacuum, while 押し上げポンプ forces liquid upward by applying pressure from below.
Compound of 押し上げ (pushing up) + ポンプ (pump). The exact historical derivation is uncertain, but the term straightforwardly describes a pump that pushes liquid upward.