US3785532A — Dispensing pump

Claim 1

Independent Claim 130 words

In a dispensing pump of the type which comprises a housing of circular cross-section and a resiliently deformable diaphragm, said housing and said diaphragm jointly defining a variable volume pump chamber; said housing being formed with an inlet passage opening thereinto concentrically to its circular crosssection and a discharge port opening radially outwardly through its circular cross-section; the improvements which include: an inlet valve carried by said diaphragm within the pump chamber to close said inlet passage as the diaphragm is deformed; and a discharge valve in the form of an annular skirt constituting an integral portion of said diaphragm, said skirt snugly encircling said housing and normally closing said discharge port, but being deflectible to uncover such discharge port in response to increased fluid pressure within said pump chamber.

Claim 2

Dependent Claim 130 words

In a dispensing pump of the type which comprises a housing of circular cross-section and a resiliently deformable diaphragm, said housing and said diaphragm jointly defining a variable volume pump chamber; said housing being formed with an inlet passage opening thereinto concentrically to its circular crosssection and a discharge port opening radially outwardly through its circular cross-section; the improvements which include: an inlet valve carried by said diaphragm within the pump chamber to close said inlet passage as the diaphragm is deformed; and a discharge valve in the form of an annular skirt constituting an integral portion of said diaphragm, said skirt snugly encircling said housing and normally closing said discharge port, but being deflectible to uncover such discharge port in response to increased fluid pressure within said pump chamber.

Claim 3

Dependent Claim 63 words

In a dispensing pump as defined in claim 1 the further improvement wherein said housing is formed with an annular recess encircling said pump chamber and sealingly receiving said annular skirt; said discharge port communicating with the rEcess in the outwardly deflected position of said skirt; said housing including a radially projecting discharge spout defining a discharge passage in communication with said recess.

Claim 4

Dependent Claim 93 words

In a dispensing pump as defined in claim 1, the further improvement wherein said inlet valve includes a stationary tubular valve member, defining said inlet passage and extending upwardly into said pump chamber with its upper free end in spaced relation to said diaphragm, and movable valve member carried by the diaphragm in normally fluid-tight telescopic relation with the stationary valve member; one of said valve members being formed with an intake port for establishing communications between the pump chamber and said inlet passage only in the normally unstressed position of the diaphragm.

Claim 5

Dependent Claim 64 words

In a dispensing pump as defined in claim 3, the feature wherein said movable valve member is of tubular configuration snugly encircling and receiving the upper free end of said stationary valve member, said stationary valve member being provided with an intake port which is covered and closed by the movable valve member in all except the fully raised position of the latter member.

Claim 6

Dependent Claim 33 words

In a dispensing pump as defined in claim 3, the feature wherein said inlet port is in the form of a downwardly extending groove in the outer wall of said stationary valve member.

Claim 7

Dependent Claim 173 words

A dispensing pump for application to a container of product to be dispensed comprising an annular housing member formed with a concentric annular recess open at one axial end thereof, a flexible bulbous diaphragm having an annular skirt received in fluid-tight manner in said recess and closing said one axial end of said annular member to define therewith a variable volume pump chamber; means entering the other end of said annular member in sealed relation thereto to define a fluid inlet passage directed toward and spaced from said diaphragm; valve means integrally carried by said diaphragm within the pump chamber to close said passage in response to axial deformation of the diaphragm; said annular skirt having a free lower edge portion within said recess normally covering a discharge port through said annular member which communicates with the pump chamber; said lower edge portion and said recess being mutually conformed to permit radial outwardly deflection of said edge portion to uncover said discharge port in response to a given fluid pressure within said port.

Claim 8

Dependent Claim 173 words

A dispensing pump for application to a container of product to be dispensed comprising an annular housing member formed with a concentric annular recess open at one axial end thereof, a flexible bulbous diaphragm having an annular skirt received in fluid-tight manner in said recess and closing said one axial end of said annular member to define therewith a variable volume pump chamber; means entering the other end of said annular member in sealed relation thereto to define a fluid inlet passage directed toward and spaced from said diaphragm; valve means integrally carried by said diaphragm within the pump chamber to close said passage in response to axial deformation of the diaphragm; said annular skirt having a free lower edge portion within said recess normally covering a discharge port through said annular member which communicates with the pump chamber; said lower edge portion and said recess being mutually conformed to permit radial outwardly deflection of said edge portion to uncover said discharge port in response to a given fluid pressure within said port.

Claim 9

Dependent Claim 27 words

The dispensing pump as defined in claim 6 in which said annular housing is formed with a discharge passage establishing communication between said recess and the atmosphere.

Claim 10

Dependent Claim 22 words

A dispensing pump as defined in claim 7 in which said housing is formed with the discharge spout defining said discharge passage.

Claim 11

Dependent Claim 64 words

A dispensing pump as defined in claim 6 in which said means entering the other end of said annular member comprises an inner member having a dip tube connected in fluid-tight relation thereto, and an upward extension of said dip tube within the pump chamber in axially opposed spaced relation to said diaphragm for cooperation with said valve means integrally carried by the diaphragm.

Claim 12

Dependent Claim 111 words

A dispensing pump as defined in claim 6 in which said means entering the other end of said annular member comprises an upward tubular extension of a container closure cap, said extension being closed at its lower end, the dip tube extending in fluid-tight manner through said closed lower end and projecting upwardly into the pump chamber to define said inlet passage, said extension constituting a stationary valve means telescopically associated with said valve means integrally carried by said diaphragm, one of said valve means being formed with an inlet port for establishing communication between said inlet port and the port chamber only in a predetermined position of the said diaphragm.

Claim 13

Dependent Claim 175 words

A dispensing pump for application to a portable product container comprising an inner member having a product intake passage therethrough; a resiliently flexible bulbous diaphragm having a Depending annular skirt; an outer member embracing said inner member and securing such diaphragm to said members to define a pump chamber the volume of which may be varied by deformation of said diaphragm; said outer member having concentric inner and outer annular portions defining there between an annular recess in which is received the annular skirt of said diaphragm; said skirt being secured in fluid-tight manner between said inner and outer portions adjacent to the mouth of said recess, and having a free peripheral edge portion within the said recess spaced from the bottom of the recess and of smaller radial dimension than the recess; said free peripheral edge portion normally encircling said inner portion of the outer member to close a discharge valve port establishing communication between the pump chamber and the said recess, but being resiliently outwardly deflectible by fluid pressure within the pump chamber.

Claim 14

Dependent Claim 175 words

A dispensing pump for application to a portable product container comprising an inner member having a product intake passage therethrough; a resiliently flexible bulbous diaphragm having a Depending annular skirt; an outer member embracing said inner member and securing such diaphragm to said members to define a pump chamber the volume of which may be varied by deformation of said diaphragm; said outer member having concentric inner and outer annular portions defining there between an annular recess in which is received the annular skirt of said diaphragm; said skirt being secured in fluid-tight manner between said inner and outer portions adjacent to the mouth of said recess, and having a free peripheral edge portion within the said recess spaced from the bottom of the recess and of smaller radial dimension than the recess; said free peripheral edge portion normally encircling said inner portion of the outer member to close a discharge valve port establishing communication between the pump chamber and the said recess, but being resiliently outwardly deflectible by fluid pressure within the pump chamber.

Claim 15

Dependent Claim 46 words

A dispensing pump as defined in claim 11 including inlet valve means carried by the said diaphragm for cooperation with said inlet passage in response to deformation of the diaphragm, to permit unidirectional flow only of the product through said inlet passage to the pump chamber.

Claim 16

Dependent Claim 91 words

A dispensing pump as defined in claim 12 in which said inlet valve means comprises a stationary valve element supported within said inner member in coaxial spaced relation thereto; said diaphragm including a top wall deformable axially into the pump chamber; a movable valve element carried by the top wall and normally in fluid-tight telescopic engagement with said stationary valve element, one of said valve elements being formed with a port positioned to establish communication between said inlet passage and said pump chamber only in the unstressed condition of the diaphragm.

Claim 17

Dependent Claim 33 words

A dispensing pump as defined in claim 13 in which said movable valve element is a sleeve integrally affixed to said top wall of the diaphragm and snugly telescopically receiving said stationary element.

Claim 18

Dependent Claim 36 words

A dispensing pump as defined in claim 14 in which the stationary valve element comprises the upper end of portion of a dip tube which extends in fluid-tight relation through the bottom of the pump chamber.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-01-14	1977-07-16	1978-01-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-01-14	1981-07-16	1982-01-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-01-14	1985-07-16	1986-01-15	$7700.00	Window Closed / Lapsed

Dispensing pump

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag