MXPA00007657A - Pump dispenser having vertical plunger with molded outlet check seat - Google Patents

Abstract

One-piece tubular plunger (14) has outlet valve compartment (72) comprising a hollow barrel (73) having an annular lip (74) at its lower end. The lip (74) forms a seat for the outlet ball check (82). Ribs (66A) extend inward to meet and reinforce the barrel above the lip (74).

Description

DISTRIBUTOR OF THE PUMP THAT HAS A VERTICAL PUMP WITH A RETENTION SEAT MOLDED TO THE DEPARTURE FIELD OF THE INVENTION This invention relates to a pump distributor. More specifically, this invention relates to a pump distributor wherein a plunger performs a reciprocating movement within a cylindrical body of the orifice. The plunger includes an outlet of the check valve with a molded seat.

BACKGROUND OF THE INVENTION U.S. Patent 3,062,416 by Cooprider, published November 6, 1962, discloses a liquid distributor comprising a hollow body and a one-piece plunger including an impeller / piston. The piston has an elongated head and its lower end inside the hollow body. The inlet and outlet of the check valve are provided and a spring pushes the plunger upwards.

REF .: 122186 In the co-pending patent application Series No. 09 / 079,481 registered on May 15, 1998, assigned to our transferee, a distributor was exposed where the outlet of the valve is a ball on the end upper and plunger in the compartment defined by the annular rim comprising the seat of the valve outlet.

BRIEF DESCRIPTION OF THE INVENTION The invention, of course, is described in the claimed language. In summary, it relates to an annular rim and the structure of the plunger adjacent to it. Within a pump distributor the invention is a plunger having an axial length with a piston head at its lower end and an impeller at its upper end, the upper end including a compartment of the outlet of the check valve defined by a cylindrical barrel of the hollow extending axially downward in the impeller. The barrel has at its lower end a descending annular flange inclined towards the axis, the flange having its internal end defining an opening and adapting to serve as a seat for the retaining ball in the compartment. The tubular plunger has rods inside accommodated along its interior, the rods are spaced outwardly from the flange and radially extend internally above the flanges to join and reinforce the barrel, by means of which mess flanges are adapted to fold out to allow the strong passage of the ball in the assembly.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects and characteristics of the invention will be clarified by a person with experience in the art with a review of < the following specification and. drawings, all have a non-limiting form of the invention. In the drawings: Fig. 1 is a sectional view through the center line of the plunger and the body of a dispenser representing the invention; Fig. 2 is a fragmentary enlarged sectional view of the outlet area of the check valve compartment as shown in Fig. 1. The rim is shown enlarged by the phantom lines as in the passage allowing the passage of a ball; Fig. 3 is an enlarged sectional view taken on line 3-3 of Fig. 1; Y Fig. 4 is a fragmentary sectional view taken on line 4-4 of Fig. 3.

DETAILED DESCRIPTION OF THE PREFERRED MODALITY A distributor of the pump representing the invention is generally designated 10 in Fig. 1. This comprises a cylindrical body of the recess 12 and a cooperating one-piece plunger? 14. Rounding the upper end of the body is the threaded closure 16.

Referring more particularly to the body 12, it is essentially in the shape of a loop including a bottom wall 18 which is formed centrally with an inlet opening 20 surrounded by a downward tubular connector 22 receiving a downwardly extending tube. opening 20 a beveled ring seat is formed The rising edge 24. A cylindrical side wall 26 extends upwardly from the perimeter of the lower wall 18 and terminates in a circular mouth 26A.

The side wall 26 (Fig. 1) extends upward to include a vent opening 27 and a tapering zone 28 and wherein the wall flares slightly outwardly inside the body on the surface 30 (Fig. 5) and it thickens as the upper end of the body 12 approaches. Above the area with gradual reduction 28 the side wall is formed inside the body with an annular radial edge 32. From the perimeter of the edge! the ascending side wall extends in a cylindrical sheath 34. Outwardly from the midpoint of the sheath portion extends an integral annular rim 36, and spaced above the rim the cylindrical sheath is formed with an outward peripheral rim 38.

The closure 16 is a threaded cap I comprising a side wall 40 and an upper wall 42 which is formed with an opening 44 for receiving the cylindrical sheath 34 at the upper end of the body. In the installation, it is sufficient to "hit" the stop 38 and the margin of the opening 44 to allow the upper wall 42 to click through the stop so that the cover is caught between the stop 38 and the edge 36.

The lid is sufficiently free in the sheath 34 so that the lid rotates while being screwed onto the end of a container (not shown). The edge 36 will of course seat over the top of the end and seal compressively against it when the lid is tightly screwed.

The plunger 14 comprises an elongated tubular piston 50. The piston 50 is defined by a barrel 51 and an elongated tubular piston head 52. In the intermediate part of the head and the barrel a narrow annular rising edge 54 is formed. The lower end of the head is formed with an annular seal 56 sealingly engages i the interior of the side wall 26 of the body 12. Inside, above the seal 56, the head has an annular descending surface 58.

As stated, the plunger 14 is tubular, formed with an axial passage 64 that can be provided with integral internal rods 66.

At the upper end of the plunger 14 and unitarily with it is the impeller 70. The impeller 70 is formed inside with a compartment of the check valve 72 (Fig. 4) defined by a recess in the impeller and the downward barrel. 73 at the lower end where there is an inwardly annular flange 74. The inner end of the flange comprises a discharge opening 75 and the upper surface of the flange is adapted to serve as a seat for the ball 81.

A stop of the central ball 76 extends from the head of the impeller into the upper portion of the compartment 72. A portion of the laterally extending impeller 70 forms the beak 78 (Fig. 5) having a discharge passage 80.

The rods 66 are formed along the inside of the rod of the tubular plunger 51. In the area of the rim 74, the rods 66 are externally separated from the rim by means of which the rim is free to flex externally to allow passage of the rod. ball as explained in the assembly.

The rods have the inner radially upper portions 66A (Fig. 4) which meet and reinforce the barrel 73 in a cylindrical portion of the compartment 72. The inner surface of the seat formed by the preferred shape of the rim has an angle a (Fig. 4). ) in a range of 10 degrees to about 40 degrees with the shaft of the plunger. Preferably i the angle a is approximately 25 degrees. The opening for the ball is 0.144 inches while the diameter of the 81 ball is 0.156 inches. The inner edge 75A of the flange may be surrounded with a radius in the range of 0.002 inches to 0.020 inches. Preferably the radius is approximately 0.005 inches.

Both the body 12 and the plunger 14 are molded from a plastic (the body can be polypropylene, while the plunger can be high density polyethylene) which is flexible in thin sections and rigid in thick sections. Flexibility in thin sections is used to advance the flange 74.

The positioning of the distributor discharge valve comprises the entrance of the retaining ball 81 which sits on the seat 24 at the lower end of the body 12, and the discharge of the retaining ball 82 rests on the internal flanges 74 on the upper end of the plunger. In assembly, the ball 82 is installed to be forcedly inserted through the flange 74 from below. A spring 84 is compressively positioned between the annular surface 58 and the lower wall 18 of the body and urges the plunger upwards. The fin 100, molded with the body 12 serves as a stop, limiting the upward travel of the plunger when the edge 54 strikes it.

The operation of the pump distributor is well known in the art exemplified by the • - * --- - - - Cooprider patent The method in which the distributor of the invention is made is set forth in the patent application referred to above.

Since the invention has been shown in only one embodiment, it is not so limited but is of a scope defined by the following claim language which can be extended by an extension of the right to execute others to make, use or seal the invention as it is appropriate under the doctrine of equivalents.

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present invention.

Having described the invention as above, the content of the following is claimed as property.

Claims (7)

1. CLAIMS 1. A distributor of the pump, characterized in that it comprises a vertical tubular unitary piston having a longitudinal axis with a piston head at its lower end and an impeller at its upper end, the upper end includes an outlet from the valve compartment retention defined by a cylindrical barrel of the recess extending axially downwardly in the impeller, the barrel has at its lower end an annular flange descending inclined towards the axis, the rim has its inner end defining an opening and is adapted to serve as a seat for a retaining ball in the compartment, the tubular plunger has rods inwardly therethrough, the rods are spaced apart from the flange and extend radially inward above the flange to meet and reinforce the barrel, by means of this the flanges adapt to fold outwards to allow the forced passage of the ball in the mo installation
2. 2. A plunger as claimed in Claim 1, characterized in that the seat defined by the internal surface of the flange is at an angle in a range of 10 degrees to 40 degrees of the axis.
3. 3. A plunger as claimed in Claim 2, characterized in that the angle is approximately 25 degrees from the axis.
4. 4. A plunger as claimed in Claim 1, characterized in that the rim edge around the opening is formed with a radius in a range of 0.002 inches to 0.020 inches.
5. 5. A plunger as claimed in Claim 4, characterized in that the radius is approximately 0.005 inches.
6. 6. A mounting method of a pump distributor, characterized in that it comprises: a. provide a vertical tubular unitary piston having a longitudinal axis with a piston head at its lower end and an impeller at its upper end, the upper end includes an outlet from the check valve compartment defined by a cylindrical barrel of the recess that is axially extends downwardly in the impeller, the barrel has at its lower end a flexible annular flange inclined downward 10 towards the shaft, the flange has its inner end defining an opening and is adapted to serve as a seat for a retaining ball in the compartment, the tubular plunger has 15 rods inward along its interior, the rods are spaced apart from the flange and extend radially inward above the flange to meet and reinforce the 20 barrel, provide a small ball fully measured to fit in the compartment yet fully large to occlude the opening when engaging the rim from within the compartment, and forcing the ball against the flexible rebojrde from the outer side of the compartment to distend the rebo to pass the ball through the opening.
7. 7. A distributor, characterized in that a vertical tubular unitary piston has a longitudinal axis with a piston head at its lower end and an impeller at its upper end, the upper end includes an exit from the compartment of the defined retention valve. by a cylindrical barrel of the hollow axially extending downwardly in the impeller, the barrel has at its lower end an annular flange descending inclined towards the axis, the rim has its inner end defining an opening and is adapted to serve as a seat for a retaining ball in the compartment, the tubular plunger has rods extending radially inwardly above the flange to meet and reinforce the barrel, by means of which the flanges adapt to flex outwards to allow forced passage of the barrel. ball in the assembly. ^ g ^ ¿j