Take-up piston shipping lock for viscous product dispensers
US4598843A · kind A · utility
16Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1984 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Oct 11, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/1211
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The atmospheric pressure-operated take-up piston of the dispenser is provided with releasable locking structure which retains the piston prior to first intentional actuation of the dispenser against jarring movements tending to pressurize the contents and promote leakage during shipment and storage. Once the piston has been intentionally unlocked from its starting position at one end of the dispenser, it is free to travel under the influence of atmospheric pressure to take up space left vacant by discharged product. Several different forms of structure means for the take-up piston are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.