US2003029515A1PendingUtilityA1

Depression container

39
Priority: Jun 18, 2001Filed: Oct 11, 2002Published: Feb 13, 2003
Est. expiryJun 18, 2021(expired)· nominal 20-yr term from priority
Inventors:Jen-Fu Chen
F04B 37/14F04B 41/02F04B 2207/02
39
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

In an aspect, a depression container includes a vessel, a cover, a pump, a pressure-activated switch and a power supply. The vessel includes an open end. The cover is used for sealing the open end of the vessel. The pump is used for drawing air out of the vessel. The pressure-activated switch is used for controlling ON and OFF of the pump. The pressure-activated switch detects the pressure in the vessel, and turns on the pump when the pressure is higher than a predetermined upper limit, and turns off the pump when the pressure is lower than a predetermined lower limit. The pressure-activated switch and the pump are powered by the power supply. In another aspect, a depression container includes a vessel, a cover, a pump, a pressure-activated switch and a power supply. The vessel includes an open end. The cover is used for sealing the open end of the vessel. The pump is used for drawing air out of the vessel. The pressure-activated switch and the pump are powered by the power supply. The pressure-activated switch is used for controlling ON and OFF of the pump. The pressure-activated switch detects a pressure difference resulting from closure of the open end of the vessel by the cover, and turns on the pump so as to draw air out of the vessel, and turns off the pump when the pressure in the vessel is lower than a predetermined lower limit.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A depression container including: 
 a vessel including a compartment with an open end;    a cover for enclosing the open end of the vessel, thus sealing the compartment;    a pump mounted on and communicated with the vessel for drawing air from the compartment; and    a pressure-activated switch mounted on and communicated with the vessel for detecting a pressure in the compartment, turning on the pump when the pressure is higher than an upper limit, and turning off the pump when the pressure is lower than a lower limit.    
     
     
         2 . The depression container according to  claim 1  wherein the vessel defines an orifice communicated with the compartment, and the pump includes a duct inserted through the orifice.  
     
     
         3 . The depression container according to  claim 2  including an airtight sleeve mounted on the duct and inserted through the orifice.  
     
     
         4 . The depression container according to  claim 1  wherein the vessel defines an orifice communicated with the compartment, and the pressure-activated switch includes a duct inserted through the orifice.  
     
     
         5 . The depression container according to  claim 4  including an airtight sleeve mounted on the duct and inserted through the orifice.  
     
     
         6 . The depression container according to  claim 1  wherein the vessel includes a collar with a thread formed on an internal face, and the pump includes a cylindrical casing formed with a thread for engagement with the thread of the collar.  
     
     
         7 . The depression container according to  claim 1  wherein the vessel includes a collar with a thread formed on an internal face, and the pressure-activated switch includes a cylindrical casing formed with a thread for engagement with the thread of the collar.  
     
     
         8 . The depression container according to  claim 1  including a box formed on the vessel for receiving the pump.  
     
     
         9 . The depression container according to  claim 1  including a box formed on the vessel for receiving the pressure-activated switch.  
     
     
         10 . A depression container including: 
 a vessel including a compartment with an open end;    a cover for enclosing the open end of the vessel, thus sealing the compartment;    a pump mounted on and communicated with the vessel for drawing air from the compartment; and    a pressure-activated switch mounted on and communicated with the vessel for detecting a pressure difference resulting from a motion of closing the vessel via the cover, turning on the pump so as to draw air out of the compartment, and turning off the pump when an pressure in the compartment detected by the pressure-activated switch is lower than a lower limit.    
     
     
         11 . The depression container according to  claim 10  wherein the pressure-activated switch includes a differential type pressure transducer and a control chip electrically connected with the pump, and the pressure transducer includes a sensor inserted into the compartment for detecting the pressure in the compartment and sending a voltage to the control chip in response to a difference between a reference pressure and the pressure detected by the sensor.  
     
     
         12 . The depression container according to  claim 11  wherein the reference pressure is the atmosphere pressure.  
     
     
         13 . The depression container according to  claim 10  wherein the vessel defines an orifice communicated with the compartment, and the pump includes a duct inserted through the orifice.  
     
     
         14 . The depression container according to  claim 13  including an airtight sleeve mounted on the duct and inserted through the orifice.  
     
     
         15 . The depression container according to  claim 10  wherein the vessel defines an orifice communicated with the compartment, and the pressure-activated switch includes a duct inserted through the orifice.  
     
     
         16 . The depression container according to  claim 15  including an airtight sleeve mounted on the duct and inserted through the orifice.  
     
     
         17 . The depression container according to  claim 10  wherein the vessel includes a collar with a thread formed on an internal face, and the pump includes a cylindrical casing formed with a thread for engagement with the thread of the collar.  
     
     
         18 . The depression container according to  claim 10  wherein the vessel includes a collar with a thread formed on an internal face, and the pressure-activated switch includes a cylindrical casing formed with a thread for engagement with the thread of the collar.  
     
     
         19 . The depression container according to  claim 7  including a box formed on the vessel for receiving the pump.  
     
     
         20 . The depression container according to  claim 7  including a box formed on the vessel for receiving the pressure-activated switch.

Join the waitlist — get patent alerts

Track US2003029515A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.