Patent US4304533A successfully refreshed from Google Patents.
US4304533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Body having fluid passages
Assignee: BUCKELL ENGINEERING Ltd MAIDENHEAD BERKSHIRE ENGLAND
•
Filing: 1978-06-27
•
Granted: 1981-12-08
•
Expires: 1998-06-27
Abstract
Abstract A machine manifold or body having fluid passages defined by relatively thin stainless-steel or other corrosion resistant tubular components embedded within a relatively thick molded plastics casing which serves to give the components strength to withstand the fluid pressures in the passages, and to permit a minimum of the expensive corrosion resistant material to be used. The passages may be formed by different tubular components located and preferably sealed together, or could be constituted by a single lost-wax casting of stainless-steel. Conveniently there is a rubbery layer between the thin metal passage defining components and the surrounding molded plastics casing.
Inventors
- 👤 Raymond A. Buckell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:58
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; B; B29; B29C; B29C39/00; B29C39/02; B29C39/10; F04B1/00; F04B1/12; F04B1/122
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
175 words
A motive fluid power device, such as a pump, internal combustion engine and the like, for handling corrosive working fluids and which has working fluid passages therein with inlets and outlets to and from the device, comprising: a plurality of relatively thin, abutting, corrosion resistant tubular components extending between the inlets and outlets, throughout the entire working fluid passages; a relatively thick casing of a solid plastics material cast around the relatively thin corrosion resistant tubular components, holding the tubular components in desired positional relationship and reinforcing the tubular components to withstand internal pressures; and a cushioning layer of material on the tubular components between the tubular components and plastics material casing for preventing damage to the casing caused by distortion of the tubular components upon load, whereby the corrosion resistant tubular components may be made with much thinner wall thickness than would otherwise be possible, and the use of separate fasteners for holding the components in assembled relationship is obviated, and further wherein the plastics material casing is protected from the corrosive working fluids.
Claim 2
Dependent Claim
175 words
A motive fluid power device, such as a pump, internal combustion engine and the like, for handling corrosive working fluids and which has working fluid passages therein with inlets and outlets to and from the device, comprising: a plurality of relatively thin, abutting, corrosion resistant tubular components extending between the inlets and outlets, throughout the entire working fluid passages; a relatively thick casing of a solid plastics material cast around the relatively thin corrosion resistant tubular components, holding the tubular components in desired positional relationship and reinforcing the tubular components to withstand internal pressures; and a cushioning layer of material on the tubular components between the tubular components and plastics material casing for preventing damage to the casing caused by distortion of the tubular components upon load, whereby the corrosion resistant tubular components may be made with much thinner wall thickness than would otherwise be possible, and the use of separate fasteners for holding the components in assembled relationship is obviated, and further wherein the plastics material casing is protected from the corrosive working fluids.
Claim 3
Dependent Claim
14 words
A device as claimed in claim 1 in which the components are keyed together.
Claim 4
Dependent Claim
17 words
A device as claimed in claim 1, in which the components are lengths of standard metal tube.
Claim 5
Dependent Claim
19 words
A device as claimed in claim 1, comprising an elastomeric layer between the tubular components and the thick casing.
Claim 6
Dependent Claim
20 words
A device as claimed in claim 1, comprising an elastomeric layer between the tubular component and the relatively thick casing.
Claim 7
Dependent Claim
15 words
A device as claimed in claim 1, in which the tubular components are of metal.
Claim 8
Dependent Claim
13 words
A device as claimed in claim 6, in which the metal is stainless-steel.
Claim 9
Independent Claim
111 words
A device for handling corrosive fluids, comprising a molded body of solid plastics material having fluid passages therein defined entirely by at least one relatively thin tubular corrosion-resistant component, which component is embedded in a surrounding, relatively thick casing of the solid plastics material molded in situ around the component, and a cushioning layer of material provided on the tubular component between the component and the plastics material casing for preventing damage to the casing caused by distortion of the tubular component upon load, whereby the casing holds the component in position and reinforces it, enabling the component to be made with much thinner wall thickness than would otherwise be possible.
Claim 10
Independent Claim
111 words
A device for handling corrosive fluids, comprising a molded body of solid plastics material having fluid passages therein defined entirely by at least one relatively thin tubular corrosion-resistant component, which component is embedded in a surrounding, relatively thick casing of the solid plastics material molded in situ around the component, and a cushioning layer of material provided on the tubular component between the component and the plastics material casing for preventing damage to the casing caused by distortion of the tubular component upon load, whereby the casing holds the component in position and reinforces it, enabling the component to be made with much thinner wall thickness than would otherwise be possible.
Claim 11
Dependent Claim
11 words
A device as claimed in claim 8, comprising a pump body.
Claim 12
Dependent Claim
19 words
A device as claimed in claim 8, in which the component has a wall less than 1/8th inch thick.
Claim 13
Dependent Claim
16 words
A device as claimed in claim 8, in which the tubular component is of a metal.
Claim 14
Dependent Claim
13 words
A device as claimed in claim 11, in which the metal is stainless-steel.
Claim 15
Independent Claim
128 words
A device for handling corrosive fluids, having fluid passages defined entirely by at least two relatively thin corrosion resistant tubular metal components sealed together in juxtaposed relationship to define the fluid passages, said components being held together and reinforced by being embedded in a relatively thick casing of a solid plastics material molded in situ around the components, and a cushioning layer of material provided on the tubular components between the components and the plastics material casing for preventing damage to the casing caused by distortion of the tubular components upon load, the corrosion resistant components thus being capable of being made with much thinner wall thickness than would otherwise be possible, and the use of separate mechanical fasteners for holding the components in assembled relationship being obviated.
Claim 16
Independent Claim
128 words
A device for handling corrosive fluids, having fluid passages defined entirely by at least two relatively thin corrosion resistant tubular metal components sealed together in juxtaposed relationship to define the fluid passages, said components being held together and reinforced by being embedded in a relatively thick casing of a solid plastics material molded in situ around the components, and a cushioning layer of material provided on the tubular components between the components and the plastics material casing for preventing damage to the casing caused by distortion of the tubular components upon load, the corrosion resistant components thus being capable of being made with much thinner wall thickness than would otherwise be possible, and the use of separate mechanical fasteners for holding the components in assembled relationship being obviated.
Claim 17
Dependent Claim
23 words
A device as claimed in claim 13 or 1 in which the tubular components have walls less than 1/8th of an inch thick.
Claim 18
Dependent Claim
24 words
A device as claimed in claim 13 or 1 including fluid seals between the tubular components where they are held in positional relationship together.
Claim 19
Dependent Claim
28 words
A device as claimed in claim 8 or 13, comprising a body whose fluid passages define a pump chamber with inlet and outlet valves fitted to the body.
Claim 20
Dependent Claim
16 words
A device as claimed in claim 16, including inlet and outlet manifolds assembled with the body.
Claim 21
Dependent Claim
28 words
A device as claimed in claim 1, 8 or 13, the casing has a wall at least five times as thick as a wall of the tubular components.
Claim 22
Dependent Claim
17 words
A device as claimed in claim 1, 8 or 13, constituting the working chamber of a pump.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |