|
US1909308A
|
|
Pressure filter
|
|
US1919034A
|
|
Pressure filter
|
|
US1918980A
|
|
Pressure filter
|
|
US1796532A
|
|
Filter element
|
|
US1796613A
|
|
Leakproof filtering apparatus
|
|
US1719619A
|
|
Sight-flow indicator
|
|
US1796531A
|
|
Lubricating system
|
|
US1768139A
|
|
Filtering system for lubricants
|
|
US1767856A
|
|
Filtering apparatus
|
|
US1536912A
|
|
Oil-purifying mechanism
|
|
US1708235A
|
|
Overflow alarm for filters
|
|
US1536911A
|
|
Combined filter and water separator
|
|
US1577653A
|
|
Oil-sediment remover
|
|
US1481525A
|
|
Oil-purifying mechanism
|
|
US1352986A
|
|
Gravity center-oiler
|
|
US1212387A
|
|
Lubricator.
|
|
US1207067A
|
|
Continuous oiling and filtration apparatus.
|
|
US1044074A
|
|
Filter.
|
|
US950556A
|
|
Oiling device.
|
|
US847432A
|
|
Ball-joint-lubricating apparatus.
|
