US3270687A

US3270687A - Hand pump

Info

Publication number: US3270687A
Application number: US382103A
Authority: US
Inventors: Hettinga Siebolt
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-07-13
Filing date: 1964-07-13
Publication date: 1966-09-06
Anticipated expiration: 1983-09-06

Description

Sept. 6, 1966 s. HETTINGA HAND PUMP 2 Sheets-Sheet 1 Filed July 13, 1964 l/v VEN 70 5/E50z r HEW/N64 5) W A4 $44444.

Sept. 6, 1966 s. HETTINGA 3,270,687

HAND PUMP Filed July 13, 1964 2 Sheets-Sheet 2 I IIIIIIIII I &

if i4? United States Patent 3,270,687 HAND PUMP Siebolt Hettinga, 734 Washington, Pella, Iowa Filed July 13, 1964, Ser. No. 382,103 4 Claims. (Cl. 103-178) This invention relates to a pump and particularly to a hand operated pump for displacing flowable material.

It is the object of this invention to provide an improved hand operated pump capable of moving flowable material such as liquids or semisolids.

Another object of the invention is to provide a hand operated pump having two relatively movable parts which are easily assembled and dismantled and do not require close manufacturing tolerances.

A further object of the invention is to provide a pump wherein the operative parts can be assembled without the use of welds, bonds or complex attachment means.

Still another object of the invention is to provide a pump with a minimum number of working parts which can be individually replaced.

A further object of the invention is to provide a hand pump wherein one part of the pump is usable as a calibrated tube.

An additional object of the invention is to provide a lightweight and portable pump which has low manufacturing cost, simplicity of construction, and reliability of operation.

These and other objects and advantages of the invention will be evident from reference to the following description and accompanying drawing, wherein:

FIG. 1 is a perspective view of the hand pump of this invention positioned in a container to displace a flowable material therefrom to a second container;

FIG. 2 is an enlarged and foreshortened view taken along the line 2-2 of FIG. 1 of the hand pump;

FIG. 3 is an enlarged exploded perspective view of one of the check valves and valve holders of the pump of FIG. 1;

FIG. 4 is an enlarged sectional view taken along the line 4-4 of FIG. 1;

FIG. 5 is an enlarged sectional view of the valve assemblies of the pump of FIG. 1 showing the position of the check valves on the upstroke of the pump;

FIG. 6 is a view similar to FIG. 5 showing the position of the check valves on the downstroke of the pump;

FIG. 7 is an elevational view of the outer tubular member of the pump of FIG. 1 used as a calibrated tube to remove a measured volume of flowable material from a container;

FIG. 8 is an enlarged sectional view taken along the line 8-8 of FIG. 7; and

FIG. 9 is a sectional view taken along the line 99 of FIG. 7.

Referring to the drawing there is shown in FIG. 1, the hand pump of this invention indicated generally at 15 and extended axially into a drum or container 16. A flowable material 17, such as a liquid or a semisolid is confined in the drum. The lower section of the hand pump 15 projects into the material 17 so that upon operation of the pump the material is displaced from the drum 16 into a pail 18.

The hand pump 15 (FIG. 2) comprises a straight outer tubular member 19 having an inlet end section 21 and an end section 22. A passage 23 extends longitudinally through the tubular member 19 which is formed from a clear or transparent plastic material. Indicia 24 are formed in the side wall of the member 19 along the length thereof for calibrating the member 19 in volume units.

Attached to the inlet section is a one-way valve unit 26 operable to only allow flowable material into the tubular member 19. As shown in FIG. 3, the valve unit 26 comprises a check valve 27 formed from a flat flexible plastic material so as to have a round body portion 29 and a concentrically spaced peripheral section 28 connected with the valve portion 29 by a neck member 31. Thus the outer peripheral edge of the disc valve portion 29 is concentrically spaced from the peripheral section 28 to define therewith an arcuate slot 32 the ends of which are at the neck 31.

The check valve 27 is held in a sealed relation with the end 21 of the tubular member 19 by a valve holder indicated generally at 33 (FIG. 3). The valve holder 33 is a substantially cup shape one-piece member having a flat bottom wall 34 of a cylinder shape formed with a central hole 36 of a diameter smaller than the diameter of the disc valve or body portion 29. Secured to the top side of the bottom wall 34 is a cylindrical sleeve or upright wall 37 concentrically spaced about the hole 36 and inwardly from the outer periphery of the bottom wall 34. The outer peripheral section of the bottom wall thus forms a laterally extended annular flange relative to the lower end of the sleeve or upright wall 37. The wall of the cylindrical sleeve 37 is interrupted with a longitudinally extended slot 38 of a width slightly greater than the width of the neck 31 of the check valve 27. The valve 26 is thus assembled with the valve holder 33 by aligning the neck 31 with the slot 38 for reception of wall 37 within the slot 32.

With the valve 26 thereon the cylindrical sleeve 37 (FIG. 2) is inserted into the bore or passage 23 of the tubular member 19 at the inlet end 21 thereof in a press fit with the side wall of the passage 23. With the sleeve thus inserted the peripheral section 28 of the check valve 27 is clamped in a fluid sealed relation between the peripheral section of the bottom wall 34 and the terminal edge of the inlet end 21 of the tubular member 19. The disc valve 29 being larger than the hole 36 in the valve holder 33 is engageable with that portion of the bottom wall 34 within the sleeve 37 so as to be flexed at the neck 31 into and out of a covering or closing position with the hole 36.

As shown in FIGS. 1 and 2, an inner tubular member 39 having a linear inlet section 41 and a curved outlet section 42 is telescoped into the outer tubular member 19. The passage or bore 43 of the tubular member 39 accommodates a flexible plastic hose 44 the inner end of which carries a cup-shaped washer 46 to maintain the circular shape thereof. The flexible hose 44 projects from the outlet end section 42 and functions to increase the effective length of the inner tubular member 39. An annular plastic ring 47 attached to the end of the outlet section 42 is engageable with the hose 44 to form therewith a fluid seal.

The linear inlet section 41 of the tubular member 39 is of a diameter less than the inside diameter of the outer tubular member 19 so as to be freely telescopic within the member 19. A collar 48 secured about the tubular member 39 limits the movement of the tubular member 39 into the tubular member 19. The outer peripheral surface of the collar 48 is tapered and functions as a wedge relative to the end section 22 of the tubular member 19 to limit the movement of the tubular member 39 within the tubular member 19.

A one-way valve unit 49 attached to the inner end of the inlet section 41 of the tubular member 39 is identical in construction to the valve unit 26 for the tubular member 19. A check valve 51 is held in a sealed relation with the inner end of the tubular member 39 by a cup-shaped valve holder 52. The check valve 51 has a disc valve or round body portion 53 movable into and out of a closing position with a hole 54 in the valve holder 52 which is inserted in a press fit within the tubular member 39 to hold the valve unit 49 on the tubular member 39.

As shown in FIG. 4, the disc valve 53 is located within the valve holder 52 and is connected to the peripheral section of the check valve 51 by a flexible neck 56 for up and down movement relative to the hole 54.

To displace a flowable material 17 from the drum 16 into the pail 18, the pump is positioned in the material as shown in FIG. 1 and the flexible hose 44 is extended from the tubular member 39 and its outlet end placed in the pail 18. The tubular member 39 is manually reciprocated into and out of the tubular member 19 to effect a pumping action. In use the operator places one hand on the section 22 of the tubular member 19 and the other hand on the curved section 42 of the tubular member 39 and alternately applies pull and push forces to reciprocate the tubular member 39 relative to the tubular member 19.

As shown in FIG. 5, when the tubular member 39 is moved in an upward direction relative to the tubular member 19, as shown by the arrow 57, the disc valve 53 of the valve unit 4-9 is in a closed relation with respect to the hole 54 in the valve holder 52. Concurrently the disc valve 29 of the valve unit 26 is moved to an open position relative to the hole 36 in the valve holder 33 due to the reduction of pressure in the passage 23 caused by the movement of the tubular member 39 relative to the tubular member 19. With the disc valve 29 open the flowable material from the drum 16 moves through the hole 36 into the passage 23 in a following relation with the inlet end section 41 of the member 39. The flowable material located in the passage 23 between the side walls of the

tubular members

19 and 39 and the engagement of the peripheral section of the check valve 51 with the inner wall of the tubular member 19 acts as seals to eliminate the flow of air between the

tubular members

19 and 39.

As shown in FIG. 6, when the tubular member 39 is pushed in a downward direction, indicated by the arrow 58, into the tubular member 19 the disc valve 29 moves into a sealed relation with the hole 36 trapping the flowable material in the passage 23. This trapped material in the passage 23 forces the disc valve 53 in an upward direction to permit the flow thereof through the hole 54 and into the passage 43 of the inner tubular member 39. From the passage 43 flow takes place through flexible hose 44- for delivery of the flowable material to the pail 18.

This sequence of operations of the

check valves

29 and 53 is repeated during each push and pull cycle of the ,pump. When the desired amount of flowable material is removed from the drum 16 the tubular member 39 is frictionally locked in the in position by forcing the collar 48 into the outer end section 22 of the tubular member 19. The flexible hose 44 is then retracted within the tubular member 39 to facilitate handling of the pump 15 for transport and storage purposes.

Referring to FIG. 7, there is shown the tubular member 19 being used as a calibrated tube to remove specific volumes of flowable material 59 from a container 61. For this purpose the inner tubular member 39 has been removed from the outer tubular member 19 so as to leave open the outer end section 22 of the member 19.

In use the inlet end section 21 carrying the valve unit 26 is inserted into a container 6 1 for a flowable material 59. As the tubular member 19 is lowered into the flowable material 59 the disc valve 29 is moved to an open position relative to the hole 36 in the valve holder 33, as shown in broken lines in FIG. 8. With the disc valve 29 in the open position the flowable material 59 moves through the hole 36 up into the passage 23 until the level of the flowable material in the passage 23 reaches a desired point with respect to the volume indicia 24. On termination of the downward movement of the tubular member 19 the disc valve 29 moves into a closed position with the hole 36 thereby trapping the desired volume of material in the tubular member 19. The tubular member 19 is then removed from the container 61 and emptied of the measured amount of flowable material by pouring the material out of the outer end section 22.

In summary the hand pump 15 has two relatively movable

tubular members

29 and 39. A one-way valve unit 26 is attached to the inlet end of the tubular member 19 and a one-way valve unit 49 is attached to the inlet end of the tubular member 39. The tubular member 39 and its valve 49 are telescoped into the tubular member 19, to form a relatively loose fit therewith. In operation the flowable material is interposed in the space between the

tubular members

19 and 39 and functions as a lubricant and seal during the relative reciprocal movement between the

members

19 and 39. This relative reciprocal movement sequentially operates the one-

way valve units

26 and 49 to permit the flowable material to enter the passage 23 in the tubular member 19 and subsequently transpose this flowable material into the passage 43 of the tubular member 39. This addition of flowable material into the passage 43 forces the flowable material initially in the passage 43 into the flexible discharge hose 44.

The entire hand pump 15 is illustrated as being formed from plastic material. While this is the preferred construction it is not intended to be limited to this type of material.

While there have been shown, described, and pointed out the fundamental novel features of the invention it will be understood that various omissions, substitutions, changes in form, and details of the hand pump illustrated may be made by those skilled in the art without departing from the spirit of the invention which is intended to be limited only as indicated by the scope of the following claims.

I claim:

1. A hand operated pump comprising:

(a) a first tubular member having an inlet end and an opposite end connected together with a passage means,

( b) first valve means including a check valve having a movable center portion and a peripheral portion and a seat member for holding the peripheral portion of the check valve in a sealed relation with the inlet end of the first tubular member, said seat member coacting with the center portion of the check valve to permit the flow of a flowable material into said inlet end,

(0) a second tubular member having an inlet end and an outlet end connected together with a passage means, said second tubular member being slidably telescoped within the first tubular member,

(d) second valve means including a check valve having a movable center portion and a peripheral portion and a seat member for holding the peripheral portion of the check valve in a sealed relation with the inlet end of the second tubular member, said seat member coacting with the center portion of the check valve to allow the flow of the flowable material into the second tubular member, whereby on movement of the second tubular member out of the first tubular member the flowable material is moved through the first valve means into the first tubular member and on movement of the second tubular member into the first tubular member the flowable material is moved from the first tubular member through the second valve means into the second tubular member for discharge from the opposite end thereof,

(e) stop means on said second tubular means for limiting the movement of the second tubular means into the first tubular means, and

(f) hose means slidably positioned in said second tubular member, said hose means being movable relative to said second tubular member to vary the effective length of said second tubular member.

2. A pump comprising:'

(a) a first tubular member having an inlet end and an opposite end,

(b) first valve means attached to the inlet end of the first tubular member and operable to only allow the flow of a flowable material into the first tubular member,

(0) a second tubular member having an inlet end and an outlet end, said second tubular member being slidably telescoped within the first tubular member,

(d) second valve means attached to the inlet end of the second tubular member and operable to only allow the flow of the flowable material into the second tubular member whereby on movement of the second tubular member outwardly of the first tubular member the flowable material is moved through the first valve means into the first tubular member and on movement of the second tubular member inwardly of the first tubular member the flowable material is moved from the first tubular member through the second valve means and into the second tubular member for discharge from the opposite end thereof, and

(e) hose means slidably positioned in said second tubular member, said hose means being movable relative to said second tubular member to vary the effective length of said second tubular member.

3. In a pump,

(a) a first tubular member having an axial bore with a side wall, an inlet end operably associated with a check valve unit, and an opposite end,

(b) a second tubular member telescoped within said first tubular member for inward and outward movement relative to said opposite end thereof, said second tubular member having an inlet end within said first tubular member and an outlet end,

(c) a check valve unit for the inlet end of said second tubular member comprising (d) a cup-shaped member having a bottom wall and an upright side wall, said bottom wall having a central opening and an annular flange portion extended laterally from said side wall, and said upright wall having a longitudinally extended slot therein, and

(e) a valve member of a disc shape having a round body portion and a peripheral section spaced from said body portion and connected thereto by a flexible neck section, said neck section and upright wall being receivable, respectively, within said slot and space to position said body portion over the opening in said bottom wall, and said upright side wall being receivable within the inlet end of said second tubular member to a position providing for the clamping of said peripheral section between the terminal edge of said inlet end and said flange, and for the contact engagement of the outer edge of said peripheral section with the side wall of said bore.

4. In a pump including:

(a) a tubular member having an inlet end,

(b) a valve unit for opening and closing said inlet end comprising (c) a cup-shaped member having a bottom wall and an upright side wall, said bottom wall having a central opening and an annular flange portion extended laterally from said side wall, and said upright wall having a longitudinally extended slot therein, and

(d) a valve member of a disc shape having a round body portion and a peripheral section spaced from said body portion and connected thereto by a flexible neck section, said neck section and upright wall being receivable, respectively, within said slot and space to position said body portion over the opening in said bottom wall, and said upright side wall being receivable within said inlet end to a position providing for the clamping of said peripheral section between the terminal edge of said inlet end and said flange.

References Cited by the Examiner UNITED STATES PATENTS 29,424 7/1860 Warner 103-488 35,108 4/1862 Palmer 103-188 736,062 8/1903 Bonham 103-188 743,299 11/1903 Lewis 222-158 X 2,798,647 7/1957 Broadwin 222-158 X WARREN E. COLEMAN, Examiner.

MARK NEWMAN, Primary Examiner.

Claims

1. A HAND OPERATED PUMP COMPRISING: (A) A FIRST TUBULAR MEMBER HAVING AN INLET END AND AN OPPOSITE END CONNECTED TOGETHER WITH A PASSAGE MEANS, (B) FIRST VALVE MEANS INCLUDING A CHECK VALVE HAVING A MOVABLE CENTER PORTION AND A PERIPHERAL PORTION AND A SEAT MEMBER FOR HOLDING THE PERIPHERAL PORTION OF THE CHECK VALVE IN A SEALED RELATION WITH THE INLET END OF THE FIRST TUBULAR MEMBER, SAID SEAT MEMBER COACTING WITH THE CENTER PORTION OF THE CHECK VALVE TO PERMIT THE FLOW OF A FLOWABLE MATERIAL INTO SAID INLET END, (C) A SECOND TUBULAR MEMBER HAVING AN INLET END AND AN OUTLET END CONNECTED TOGETHER WITH A PASSAGE MEANS, SAID SECOND TUBULAR MEMBER BEING SLIDABLY TELESCOPED WITHIN THE FIRST TUBULAR MEMBER, (D) SECOND VALVE MEANS INCLUDING A CHECK VALVE HAVING A MOVABLE CENTER PORTION AND A PERIPHERAL PORTION AND A SEAT MEMBER FOR HOLDING THE PERIPHERAL PORTION OF THE CHECK VALVE IN A SEALED RELATION WITH THE INLET END OF THE SECOND TUBULAR MEMBER, SAID SEAT MEMBER COACTING WITH THE CENTER PORTION OF THE CHECK VALVE TO ALLOW THE FLOW OF THE FLOWABLE MATERIAL INTO THE SECOND TUBULAR MEMBER, WHEREBY ON MOVEMENT OF THE SECOND TUBULAR MEMBER OUT OF THE FIRST TUBULAR MEMBER THE FLOWABLE MATERIAL IS MOVED THROUGH THE FIRST VALVE MEANS INTO THE FIRST TUBULAR MEMBER AND ON MOVEMENT OF THE SECOND TUBULAR MEMBER INTO THE FIRST TUBULAR MEMBER THE FLOWABLE MATERIAL ID MOVED FROM THE FIRST TUBULAR MEMBER THROUGH THE SECOND VALVE MEANS INTO THE SECOND TUBULAR MEMBER FOR DISCHARGE FROM THE OPPOSITE END THEREOF, (E) STOP MEANS ON SAID SECOND TUBULAR MEANS FOR LIMITING THE MOVEMENT OF THE SECOND TUBULAR MEANS INTO THE FIRST TUBULAR MEANS, AND (F) HOSE MEANS SLIDABLY POSITIONED IN SAID SECOND TUBULAR MEMBER, SAID HOSE MEANS BEING MOVABLE RELATIVE TO SAID SECOND TUBULAR MEMBER TO VARY THE EFFECTIVE LENGTH OF SAID SECOND TUBULAR MEMBER.