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CA2219682A1 - Self-evacuating vacuum cleaner - Google Patents

Self-evacuating vacuum cleaner

Info

Publication number
CA2219682A1
CA2219682A1 CA002219682A CA2219682A CA2219682A1 CA 2219682 A1 CA2219682 A1 CA 2219682A1 CA 002219682 A CA002219682 A CA 002219682A CA 2219682 A CA2219682 A CA 2219682A CA 2219682 A1 CA2219682 A1 CA 2219682A1
Authority
CA
Canada
Prior art keywords
tank
vacuum cleaner
pump
liquid
self
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002219682A
Other languages
French (fr)
Other versions
CA2219682C (en
Inventor
Robert C. Berfield
Randy L. Buss
Robert L. Crevling
Craig A. Seasholtz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shop Vac Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/678,997 external-priority patent/US5850668A/en
Priority claimed from US08/727,318 external-priority patent/US5918344A/en
Priority claimed from US08/802,333 external-priority patent/US5920955A/en
Application filed by Individual filed Critical Individual
Priority to CA002490634A priority Critical patent/CA2490634C/en
Publication of CA2219682A1 publication Critical patent/CA2219682A1/en
Application granted granted Critical
Publication of CA2219682C publication Critical patent/CA2219682C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A vacuum cleaner has an electric motor driving an air impeller for creating suction and a pump which draws liquid material through an inlet tube from the bottom of a tank and expels it from the tank.
The vacuum cleaner also includes a mechanical shut-off and override assembly that automatically shuts off the motor if the liquid level in the tank gets too high. A user, however, can mechanically override this automatic shut-off in order to continue pumping liquid out of the tank. A
priming apparatus is. disposed in the tank in fluid communication with the pump, and a valve is selectively actuable to establish a pressure differential across liquid in the priming apparatus to thereby prime the pump.
CA002219682A 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner Expired - Lifetime CA2219682C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002490634A CA2490634C (en) 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US08/678,997 1996-07-12
US08/678,997 US5850668A (en) 1996-07-12 1996-07-12 Self-evacuating vacuum cleaner
US08/727,318 US5918344A (en) 1996-07-12 1996-10-08 Self-evacuating vacuum cleaner
US08/727,318 1996-10-08
US08/802,333 US5920955A (en) 1996-07-12 1997-02-11 Self-evacuating vacuum cleaner
US08/802,333 1997-02-11
PCT/US1997/012067 WO1998002081A1 (en) 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002490634A Division CA2490634C (en) 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner

Publications (2)

Publication Number Publication Date
CA2219682A1 true CA2219682A1 (en) 1998-01-12
CA2219682C CA2219682C (en) 2006-03-21

Family

ID=36101537

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002219682A Expired - Lifetime CA2219682C (en) 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner

Country Status (1)

Country Link
CA (1) CA2219682C (en)

Also Published As

Publication number Publication date
CA2219682C (en) 2006-03-21

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170711