Tamper resistant hand-operated pneumatic pump
US9863409B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 2013 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B33/005
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An Example can include an elongate pump barrel extending along a length and defining an elongate hollow piston chamber. The Example can include a piston slidably movable within the piston chamber to compress air within the piston chamber. The Example can include a piston rod connected to the piston. The Example can include a handle connected to the piston rod to reciprocally slide the piston in the piston chamber. The Example can include a piston rod seal disposed around the piston rod and coupled with the elongate pump barrel. The Example can include a downward opening air intake passage, located away from the rod seal, in fluid communication with a top of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.