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US 6,644,517 B2Granted
Stem configuration to reduce seal abrasion in metered dose aerosol valves
Assignee3M Innovative Properties Company
InventorsCharles G. Thiel, Peter D. Hodson, Andrew M. Bryant
Life of this patent
Estimating the term…
Abstract
A valve stem for use in an aerosol valve such as a metered dose medicinal aerosol valve is described. The valve stem includes a flattened area around the side hole. The flattened area helps reduce damage to the diaphragm aperture upon repeated actuation of the metered dose inhaler. Also described is a metered dose valve and a metered dose inhaler, each including the flattened valve stem of the present invention.
Claims16
An aerosol valve stem comprising:
- a generally cylindrical body having a tip at one end and a body wall defining a hollow core extending axially from the tip into the body;
- a side hole through the body wall in fluid communication with the hollow core;
- and
- a flattened area around the hole comprising a sealing section adjacent to the side hole.
1 more element
An aerosol valve stem comprising;
- a generally cylindrical body having a tip at one end and a body wall defining a hollow core extending axially from the tip into the body;
- a side hole through the body wall in fluid communication with the hollow core, and comprising a beveled edge;
- and
- a flattened area around the hole.
1 more element
An aerosol valve stem comprising:
- a generally cylindrical body having a tip at one end and a body wall defining a hollow core extending axially from the tip into the body;
- a side hole through the body wall in fluid communication with the hollow core, and comprising a rounded edge;
- and
- a flattened area around the hole.
1 more element
Dependencies are inferred from the claim text.