Pumps – Expansible chamber type – Mechanically actuated distributor
Patent
1997-06-16
1999-07-27
Thorpe, Timothy S.
Pumps
Expansible chamber type
Mechanically actuated distributor
417514, 417550, 4175551, 425502, F04B 700, E03D 900
Patent
active
059279575
ABSTRACT:
New plunger having a cylindrical hollow body 20 or 20B, a handle 30, 30A, or 30B, an outlet hose 40, an outlet tip 42, and a valve or flap 50, 60, or 70 that is able to control the air flow within the hollow 25 of the cylindrical body 20 or 20B. Valve or flap 50, 60, or 70 is moved into a closed position so that air is forced out of the front of the plunger and towards a clogged or stopped area 82 or 92 and is moved into an open position so that air enters the back of the plunger and passes valve or flap 50, 60, or 70 so that water and/or clogging material is not drawn or sucked into the interior of the plunger. First embodiment plunger 10 discloses a flexible valve flap 50 that compresses against the inner wall of the cylindrical body 20 in a closed position and flexes outwardly and away from piston plate 38 in an open position. Second embodiment plunger discloses a circular valve plate 60 that slidingly fits within inner portion of piston plate 38 wherein valve plate 60 is coupled to and controlled by handle control mechanism 64. Handle control mechanism 64 controls and places valve plate 60 in a closed position or an open position. Third embodiment plunger discloses handle 30B having piston plate 38 with rotatingly engaging tab portion 37 and flexible valve flap 70 with perforated by-pass holes 74 and slidingly engaging tab portions 72.
REFERENCES:
patent: 1379492 (1921-05-01), Wagner
patent: 1405907 (1922-02-01), Edwards
patent: 1455584 (1923-05-01), Graham
patent: 4847923 (1989-07-01), Huang
patent: 5156538 (1992-10-01), Lee
Super Plunger Advertisement One page ad sponsored by Handsome Rewards, CA (No Date).
Kennedy Craig A.
Poole Daniel L.
Thorpe Timothy S.
Tyler Cheryl J.
Weiss Harry M.
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