CA2490634A1 - Self-evacuating vacuum cleaner - Google Patents

Self-evacuating vacuum cleaner

Info

Publication number
CA2490634A1
CA2490634A1 CA002490634A CA2490634A CA2490634A1 CA 2490634 A1 CA2490634 A1 CA 2490634A1 CA 002490634 A CA002490634 A CA 002490634A CA 2490634 A CA2490634 A CA 2490634A CA 2490634 A1 CA2490634 A1 CA 2490634A1
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
CA002490634A
Other languages
French (fr)
Other versions
CA2490634C (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
Shop Vac Corporation
Robert C. Berfield
Randy L. Buss
Robert L. Crevling
Craig A. Seasholtz
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 Shop Vac Corporation, Robert C. Berfield, Randy L. Buss, Robert L. Crevling, Craig A. Seasholtz filed Critical Shop Vac Corporation
Priority claimed from CA002219682A external-priority patent/CA2219682C/en
Publication of CA2490634A1 publication Critical patent/CA2490634A1/en
Application granted granted Critical
Publication of CA2490634C publication Critical patent/CA2490634C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.
CA002490634A 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner Expired - Lifetime CA2490634C (en)

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 1997-02-11
US08/802,333 US5920955A (en) 1996-07-12 1997-02-11 Self-evacuating vacuum cleaner
CA002219682A CA2219682C (en) 1996-07-12 1997-07-11 Self-evacuating vacuum cleaner

Related Parent Applications (1)

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

Publications (2)

Publication Number Publication Date
CA2490634A1 true CA2490634A1 (en) 1998-01-22
CA2490634C CA2490634C (en) 2007-09-18

Family

ID=34199026

Family Applications (1)

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

Country Status (1)

Country Link
CA (1) CA2490634C (en)

Also Published As

Publication number Publication date
CA2490634C (en) 2007-09-18

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170711