US 1982497 A
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Description (OCR text may contain errors)
Nav. 27, 1934.'
L. M. COTCH ETT PUMP v Filed sept. 15, 1953 Il JAN VIV Patented Nov. 2,7, 1934 c PUMP l Louis 'M. Cotchett, Hingham, Mass., assignor to -Textile -Patent & Process Company, Boston,
Mass., a corporation of Massachusetts' Application September 13, 1933, Serial No. 689,243
, The present invention relates to hand-operated pumps and the like, which have particular adaptation 'for the atomization of fluids such as cleaning fluids, perfume, insecticides and others. The
5 pump is readily adaptable to a compactI form `of fluid container, and operates with greater eiliciency' and less likelihood of deterioration than the usual form of pump or rubber bulb atomizer employed for such a purpose. Y
'I'he various features consi-st`in certain novel features of construction, combinations and arrangements of parts more particularly described hereafter and set forth in the accompanying claims.
In the drawing illustrating the preferred form of the invention, Fig. l isa side elevation of a fluid container and applied atomizing or pumping unit; and Fig. 2 is an elevation in section upon an enlarged scale of the same unit illustrating the internal construction of the pump Referring particularly to-the illustrated embodiment of the invention, the fluid may be contained in a suitable form of container sucl as a. glass member 10, having a ribbed top portion 12 closed by a detachable cap 14 threaded tothe top at`16to approximately seal the container. The
pumping element is mounted directly in the cap 14 through the provision of a guide sleeve 18 depending centrally of the cap and locked thereto by a disk 20 receivedin a shouldered portionA of the sleeve, and by a spun-out flange 22 engaging with the opposite side of the cap, as will be selfevident. Sliding freely within the sleeve is a chamber 26 vented at its upper end through an atomizing plug 28 sealed within the plunger and having an atomizing vent 3 in the outer end. The interior of the plug 4is in free communication with the chamber 26. which is normally closed at its lower end by a ball check valve 32, resting upon aV seat 34 formed in a plug 136. The plug is capable of sliding within the chamber 26, and is E normally retained in the lowermost position shown in the drawing by a coil spring 38, the downward `movement being limited by an inturned shoulder 40 formedvon the plunger.
Connected with the plug 36 and projecting downwardly from the pump unit is a replenishing tube or inlet connection 42 of sufficient length to extend approximately to the bottom of the container as indicated, the 'tube having an opening 44 to admit liquid thereinto even though the end of the tube contacts with the bottom.
In practice, after the assembly is mounted upon hollow plunger 24, provided with an internal the container, depression of the plunger by pressure upon the surface contracts the chamber 26 and causes fluid therein to be ejected forcibly through the atomizing jet 30,v the ball 32 seating to prevent egress from the chamber in this direction. Upon release. of the plunger 50 and return by the spring 38, sufcient suction is created to draw fluid upwardly through the tube 42 and ball check 32 to replenish the chamber interiorly. Thereafter depression .of the plunger again ejects fluid, and the operation may be repeated as desired.
It will be evident that with this construction the element may be readily interchanged between containers, is compact, fool-proof, and by proper formation of the cap'may be applied to any form or size of container. The pump is particularly adaptableto containers of small Volume which are portable and may be held in the hand for directing the atomizing jet as desired.
When not in use the upward movement of the plunger 24 under the action of the spring 38 is limited by an out-turned shoulder 52, which engages with the lower end of the guide sleeve' 1 8. Obviously this upward movement may be caused by engagement of the tube 42 with the bottom of the container, 'causing the spring 38 to thrust upwardly on the surrounding plunger.
What is claimed is:
l. The combination with a container designed as a fluid reservoir of a. cap detachably closing the container, a hollow plunger forming a chamber sliding in the Acap and carrying a delivery outlet from the chamber to atmosphere, a fluid conducting tube extending from the interior of `the plunger into the container and slidably engaged with the plunger to replenish the plunger interiorly, and means for resiliently moving the plunger in a direction to expand the chamber therewithin.
2. The combination with a fluid container of. a cap detachably sealing the container, a. guide sleeve on the cap, a hollow plunger sliding within the sleeve and providing an expansible chamber, anY atomizing outlet connecting the chamber with atmosphere, a fluid lead-in tube `communicating `with said container and -slidingly connected with the chamber of the plunger at the inner end, a valve for closingj communication between the chamber and the lead-in tube on movement inwardly of' said plunger, and a spring mounted in thechamber for normally maintaining the chamber expanded.
3. A fluid pumping unit comprising a hollow plunger forming a chamber, a guide within which closing the chamber within the plunger at one end, a uid inlet communicating with the slidable closure, a spring in the chamber-for normally maintaining the slidable closure at the end of the chamber, an outlet from the opposite en d of the chamber, and a valve for closing communication with the inlet upon contraction of the chamber within .the plunger.
4. The combination with a iluid container of a detachable closure for the container, a chambered plunger slidably mounted upon-the closure and having a delivery opening to atmosphere .at the outer end, a fluid lead-in tube within the co'ntainer and extending to fthe inner end of the plunger, means for slidably sealing the lead-in tube to the interior of the plunger to closethe chamber therein, means within the chamber of theplunger for normally thrusting the lead-in tulbe against .the container to provide a. xed base against which the chamber can be contracted,
1,982,497 the plunger slidably moves, means for slidably and a valve closing the inlet tube on contraction of the chamber.
` 5. The combination with a liquid container -of a closure therefor, a hollow plunger slidingly mounted in the closure and closed at its outer end except for .the provision of a restricted delivery outlet connecting a chamber within the plunger to atmosphere, a liquid lead-in tube slidingly supported at the inner endl of fthe plunger to close the chamber 'therewithin, means upon the plunger for the connected end of the lead-in tube from disengagement from the plunger, a spring supported within the chamber of the plunger for normally expanding the chamber by moving the plunger outwardly with respect to the lead-in tube, and. a valve for closing communication between the lead-in tube and plunger chamber upon movement ofthe plunger to contract the chamber.
LOUIS M. COTCHETT.