GB Patent: GB-288,949
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| Improvements relating to reciprocating pumps
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Patentee:
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| Harold Walker Pearn (exact or similar names) - West Gorton, Manchester, England |
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Patent Dates:
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| Applied: |
Jan. 12, 1928 |
| Granted: |
Apr. 19, 1928 |
Espacenet patent
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Jeff Joslin
Vintage Machinery entry for Frank Pearn & Co., Ltd.
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Description: |
| "The outer face of the piston a of a pump is sealed by liquid in a hopper g at the open end of the cylinder. The sealing liquid and the liquid in the pump chamber d have access to the inner faces of the piston rings through passages h. In the case of a vertical pump the sealing liquid is in the open end of the barrel above the piston." |
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