Control for spraying foam into hollow body cavities
US5804110A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1994 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Oct 6, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A control for dispensing foam into hollow body cavities includes an index hole positioned adjacent to a dispense hole to receive the foam. The index hole carries information that is read by a sensor associated with a foam spray gun, wherein the information is selected to correspond to the desired amount of foam for the particular body cavity. With the inventive foam spray gun and method, an operator merely inserts the dispense nozzle into a dispense hole, and the sensor reads the information from the index hole. The sensor signal then allows control of the amount of foam dispensed into the dispense hole. This eliminates problems that have been experienced in the past wherein operators were forced to remember the amount of "shots" of fixed volumes of foam for each hole. In the past, operators may sometimes have dispensed too little foam or too great an amount of foam for a particular hole. Further, in the past, operators may sometimes have dispensed foam into a hole that should not have received any foam. The foam spray gun is preferably of the type having a reciprocating plunger controlling flow of the foam components to the dispense nozzle. The plunger is controlled by a trigger, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.