Tamper-evident plunger-hold-down attachment for pump dispenser
US5975370A · kind A · utility
64Cited by
10References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Mar 16, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The attachment comprises a cylinder-embracing support portion at least partly encircling the upper end of the pump cylinder and having openings therein receiving hooks on the cylinder. Unitary with the support portion is a plunger hold-down portion which engages the upper end of the actuator portion of the plunger. The attachment has a tamper-evident frangible zone located between the cylinder-embracing support portion and the engagement with the actuator portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.