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Class Information
Number: 417/544
Name: Pumps > Expansible chamber type > Having pulsation dampening fluid receiving space > Direct contact with confined compressible fluid > Manually operated pump
Description: Apparatus in which the space having confined compressible fluid is associated with a pump of the type which is manually operated, e.g., by a handle or treadle.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7165951 |
High-pressure generating device |
Jan. 23, 2007 |
| 6716003 |
Structure for an air pump |
Apr. 6, 2004 |
| 6652242 |
Pump |
Nov. 25, 2003 |
| 6592343 |
Air compression device |
Jul. 15, 2003 |
| 6308528 |
Fluid delivery apparatus and method |
Oct. 30, 2001 |
| 5782621 |
Manual pump with inherent vacuum limit |
Jul. 21, 1998 |
| 5363665 |
Hand pump for evacuating and charging a refrigerating system |
Nov. 15, 1994 |
| 5363666 |
Manually operated refrigerant recovery device |
Nov. 15, 1994 |
| 5336065 |
Manually operated refrigerant recovery device |
Aug. 9, 1994 |
| 5222553 |
Water well pump |
Jun. 29, 1993 |
| 5217354 |
Hand-held vacuum and pressure pump with improved handle |
Jun. 8, 1993 |
| 4222501 |
Dual chamber, continuous action dispenser |
Sep. 16, 1980 |
| 4191313 |
Trigger operated dispenser with means for obtaining continuous or intermittent discharge |
Mar. 4, 1980 |
| 4187845 |
Apparatus for feeding anesthetic and/or life sustaining gases during a surgical procedure |
Feb. 12, 1980 |
| 3967762 |
Pump for dispensing liquid from a container in a generally continuous manner |
Jul. 6, 1976 |
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