Back to results
US 12,704,486 B2Granted
Pump unit for chromatograph
AssigneeShimadzu Corporation
InventorsMasanori Fujiwara, Takafumi Nakamura, Yuki Iijima, Kosuke Wada
Life of this patent
Estimating the term…
Abstract
A pump unit for a chromatograph includes a plunger pump and an upstream check valve. The plunger pump has a pump head and pumps a mobile phase. The upstream check valve is provided upstream of the pump head. The upstream check valve includes a flow-path portion and a temperature regulator. The flow-path portion guides the mobile phase to the plunger pump. The temperature regulator regulates a temperature of the mobile phase passing through the flow-path portion.
Claims10
A pump unit for a chromatograph, comprising:
- a plunger pump that has a pump head and pumps a mobile phase;
- and
- a check valve provided upstream of the pump head, wherein
- the check valve includes
- a housing,
- a flow-path portion that is provided in the housing and guides the mobile phase to the plunger pump, and
- a temperature regulator that regulates a temperature of the mobile phase passing through the flow-path portion and causes the mobile phase having a constant density to be introduced into the pump head by heating the housing.
4 more elements
A pump unit for a chromatograph, comprising:
- a plunger pump that has a pump head and pumps a mobile phase;
- and
- a check valve provided upstream of the pump head, wherein
- the check valve includes
- a flow-path portion that guides the mobile phase to the plunger pump,
- a temperature regulator that regulates a temperature of the mobile phase passing through the flow-path portion,
- a housing that has an inner space and contains the flow-path portion in the inner space, and
- a plug that has a through hole connected to the flow-path portion and fills the inner space of the housing,
- the temperature regulator is attached to an outer surface of the housing, and
- the plug is formed of a material having thermal conductivity lower than that of the housing.
7 more elements
Dependencies are inferred from the claim text.