US3771908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for pumping gluey material
Assignee: Individual
•
Filing: 1970-11-06
•
Granted: 1973-11-13
•
Expires: 1990-11-06
Abstract
Abstract A pump for use in pumping gluey material and a process for pumping gluey material in which the pump includes a cylinder having a chamber through which gluey material is adapted to be pumped on one side of the piston head and a sealed chamber on the other side of the piston head in fluid communication with a solvent contained in a receptacle means normally arranged above the chamber through which the gluey materials are pumped to bathe the sliding surfaces and resist build-up of gluey materials tending to jam the pump. The pump also includes a bleed valve means for initiating operation of the apparatus and process and also a suck-back mechanism comprising a normally closed but partially opened one-way valve effective to work the discharged material during the aspirating stroke of the pump and to resist setting of the materials at the discharge station or a dispensing point to which the pump flows materials.
Inventors
- 👤 S Rosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:12
CPC Classifications
F; F04; F04B; F04B53/00; F04B15/00; F04B15/02; F04B53/16; F04B53/162; F04B53/164
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
151 words
In a pump including a reciprocal piston assembly having a head and a cylinder snugly circumposed about said head when in operation and means closing both ends of the cylinder defining a first pumping chamber on one side of the head and a second chamber on the other side of said head, and said pump having a flow path into and out of the pumping chamber, the improvement comprising, sealing means and a port at one end for said second chamber, a receptacle for a solvent to be positioned above said head with an opening in the lower portion, and exterior duct means in fluid communication between the receptacle opening and the port of the second chamber, whereby in reciprocating action of the piston head solvent in the receptacle will be cyclically flowed into and out of the second chamber to bathe the cylinder surfaces traversed by the piston head travel.
Claim 2
Dependent Claim
151 words
In a pump including a reciprocal piston assembly having a head and a cylinder snugly circumposed about said head when in operation and means closing both ends of the cylinder defining a first pumping chamber on one side of the head and a second chamber on the other side of said head, and said pump having a flow path into and out of the pumping chamber, the improvement comprising, sealing means and a port at one end for said second chamber, a receptacle for a solvent to be positioned above said head with an opening in the lower portion, and exterior duct means in fluid communication between the receptacle opening and the port of the second chamber, whereby in reciprocating action of the piston head solvent in the receptacle will be cyclically flowed into and out of the second chamber to bathe the cylinder surfaces traversed by the piston head travel.
Claim 3
Dependent Claim
18 words
The improvement as set forth in claim 1 wherein bleed valve means are arranged in said second chamber.
Claim 4
Dependent Claim
32 words
The improvement as set forth in claim 1 wherein the piston assembly includes a piston rod extending through said chamber and the sealing means are arranged intermediate said rod and said cylinder.
Claim 5
Dependent Claim
27 words
The improvement as set forth in claim 1 wherein a nipple is provided at said port, said nipple being sized fluid tight interconnection with said duct means.
Claim 6
Dependent Claim
25 words
The improvement as set forth in claim 1 wherein said pump includes a one-way valve in said discharge path in a normally substantially closed attitude.
Claim 7
Dependent Claim
25 words
The improvement as set forth in claim 2 wherein said pump includes a one-way valve in said discharge path in a normally substantially closed attitude.
Claim 8
Dependent Claim
21 words
The improvement as set forth in claim 5 wherein means are provided to vary the normal position of said one-way valve.
Claim 9
Dependent Claim
87 words
The improvement as set forth in claim 7 wherein said one-way valve includes a member to block fluid flow through said valve and a seat, and means normally urging said valve into nesting relation on said seat to block said valve, and said means to vary the normal position of said one-way valve comprises a key adapted to be traveled intermediate said member and said seat, said key including a cam surface to engage said member to vary the normal opening between said seat and said member.
Claim 10
Dependent Claim
111 words
In a pump including a cylinder and a piston assembly having a head at all times within said cylinder and a rod at all times extending from one end of the cylinder, guide means intermediate the rod and the cylinder and a valve housing including a portion closing the other end of the cylinder and defining an intake and discharge path for materials being pumped and a one-way normally substantially closed valve means in the discharge path of the pump including a member movable into and out of a position substantially blocking flow through said discharge path, the improvement comprising suck-back adjustment means to vary the normal position of said member.
Claim 11
Dependent Claim
111 words
In a pump including a cylinder and a piston assembly having a head at all times within said cylinder and a rod at all times extending from one end of the cylinder, guide means intermediate the rod and the cylinder and a valve housing including a portion closing the other end of the cylinder and defining an intake and discharge path for materials being pumped and a one-way normally substantially closed valve means in the discharge path of the pump including a member movable into and out of a position substantially blocking flow through said discharge path, the improvement comprising suck-back adjustment means to vary the normal position of said member.
Claim 12
Dependent Claim
106 words
The device as set forth in claim 9 wherein said guide means spans the other end of said cylinder and includes sealing means to define a fluid tight bath chamber on the rode side of said piston, a port in said cylinder communicating with said bath chamber adjacent said guide means, and a receptacle for a solvent including a duct with one end connected to the lower portion of said receptacle and the other end adapted to connect to said port and said duct means being of a length greater than the distance from said duct to said portion closing the other end of the cylinder.
Claim 13
Dependent Claim
24 words
The improvement as set forth in claiM 10 wherein bleed valve means are arranged in communication with said bath chamber at said other end.
References Cited (Backward Citations)
NL19730C
Cited
US865151A
Cited
US1013579A
Cited
US1415617A
Cited
CH155864A
Cited
DE656340C
Cited
US2330781A
Cited
GB697564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |