Patent US4848598A successfully refreshed from Google Patents.
US4848598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing device
Assignee: Colgate Palmolive Co
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Filing: 1988-02-29
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Granted: 1989-07-18
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Expires: 2008-02-29
Abstract
Abstract A dispensing device of the hand-help pump type has an internal piston which is pulled up by a rod passing through the piston, which rod is moved by an actuator. When the contents of the piston are emptied, in order to attach a refill, a dog release mechanism operates to release the dogs which, in normal use when the device is full, function to prevent the piston from being drawn downwardly so that the piston can be removed to allow attachment of the refill which has a new piston.
Inventors
- 👤 James C. McKinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:12
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/76; B65D83/763; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
A dispensing device having a body, a head attached to the body, a piston, a rod passing through the piston, actuator means for pulling the piston up toward the head, flexible means for engaging the rod to prevent the piston from downward movement when the device has contents remaining in it, and means for moving the flexible means out of engagement when the piston reaches its uppermost point of travel, said means for moving the flexible means comprising said body having an internal shoulder neat its upper end, and said moving means further comprises said piston surrounding a collar, said collar disposed for movement in the piston in a downward direction when said collar engages said internal shoulder to release the flexible means from the rod.
Claim 2
Dependent Claim
126 words
A dispensing device having a body, a head attached to the body, a piston, a rod passing through the piston, actuator means for pulling the piston up toward the head, flexible means for engaging the rod to prevent the piston from downward movement when the device has contents remaining in it, and means for moving the flexible means out of engagement when the piston reaches its uppermost point of travel, said means for moving the flexible means comprising said body having an internal shoulder neat its upper end, and said moving means further comprises said piston surrounding a collar, said collar disposed for movement in the piston in a downward direction when said collar engages said internal shoulder to release the flexible means from the rod.
Claim 3
Dependent Claim
31 words
The invention of claim 1 wherein said collar includes a dog stop which has an extension which pushes said flexible means away from the rod when the collar engages said shoulder.
Claim 4
Dependent Claim
20 words
The invention of any one of said claims 1 or 2 wherein the dispenser is adapted to receive a refill.
Claim 5
Dependent Claim
42 words
A refill in combination with claim 4 wherein the refill comprises a refillable dispensing means comprising a closed bottom and integral side walls and open top end and having disposed therein a piston with an opening therein for reception of the rod.
Claim 6
Dependent Claim
31 words
The invention of claim 4 wherein the piston has connected to it flexible means for engaging said rod to prevent the piston from moving in a down direction during normal use.
Claim 7
Dependent Claim
47 words
The invention of claim 5 wherein the piston surrounds a movable collar having dog means and wherein the collar is operable to move down in the piston to move the dog means down so that the latter move the flexible means out of engagment with the rod.
Claim 8
Dependent Claim
29 words
The invention of claim 4 wherein the refill is made of material including polymers selected from the group consisting of PE, PP, copolymers of PP and PE and PET.
Claim 9
Dependent Claim
27 words
The invention of claim 4 wherein the refill is made at least in part of multilayer material wherein at least one layer is a gas barrier material.
Claim 10
Dependent Claim
21 words
The invention of claim 8 wherein the gas barrier material is selected from the group consisting of EVOH, PA and PC.
Claim 11
Dependent Claim
17 words
The invention of any one of claims 1 or 2 and 5-9 wherein the rod is notched.
Claim 12
Dependent Claim
17 words
The invention of any one of claims 1 or 2 and 5-9 wherein the rod is smooth.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |