EP0167274A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pump
Assignee: Cartwright Garry Ernest
•
Filing: 1985-05-30
•
Granted: —
•
Expires: 2005-05-30
Abstract
Abstract An oscillatory pump comprising a cylinder (9) having normally-closed valves (10,13) of flexible material fixedly located at the inlet (A c ) and outlet (Be) ends of the cylinder (9), a piston (1) having an inlet (Ap) and an outlet (Bp), said piston (1) being reciprocatable within the cylinder (9) and provided with a further valve (6) of flexible material movable with the piston (1) and located at the outlet end (Bp) of the piston (1), the piston (1) being constructed such as to allow fluid to pass from an inlet chamber (C1) formed between the inlet valve (10) and the inlet end (Ap) of the piston (1) to an outlet chamber (C2) formed between the further valve (6) and the outlet valve (13) in response to movement of the piston (1) within the cylinder (9) and means (1.2.3) for effecting reciprocatory movement of the piston (1) within the cylinder (9).
Inventors
- 👤 Garry Ernest Cartwright
- 👤 Paul Palmer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 01:08
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/123; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B53/1037; F04B53/1047; F04B53/106; F04B53/1067; F04B53/107; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/145
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A one-way valve comprising a housing defining a passageway therethrough, a valve seat located generally centrally of the passageway, and a generally annular flexible valve member secured at its periphery to the housing and extending inwardly to the valve seat, the member being arranged so that excess pressure across the valve member in one direction along the passageway causes the flexible member to extend away from the valve seat thereby permitting fluid flow in the said one direction, whereas excess pressure in the other direction urges the flexible member to seal against the valve seat thereby preventing fluid flow in the said other direction.
Claim 2
Dependent Claim
104 words
A one-way valve comprising a housing defining a passageway therethrough, a valve seat located generally centrally of the passageway, and a generally annular flexible valve member secured at its periphery to the housing and extending inwardly to the valve seat, the member being arranged so that excess pressure across the valve member in one direction along the passageway causes the flexible member to extend away from the valve seat thereby permitting fluid flow in the said one direction, whereas excess pressure in the other direction urges the flexible member to seal against the valve seat thereby preventing fluid flow in the said other direction.
Claim 3
Dependent Claim
23 words
A valve as claimed in claim 1 wherein the valve member extends inwardly and in the said one direction to the valve seat.
Claim 4
Dependent Claim
26 words
A valve as claimed in claim 2 wherein the surface of the valve seat engaged by the valve member is oriented generally longitudinally of the passageway.
Claim 5
Dependent Claim
13 words
A valve as claimed in claim 3 wherein the said surface is conical.
Claim 6
Dependent Claim
42 words
A valve as claimed in any preceding claim wherein the valve seat is provided by a valve seat member mounted to the housing and extending across the passageway, the valve seat member having at least one hole formed therethrough for fluid flow.
Claim 7
Dependent Claim
27 words
A valve as claimed in claim 5 wherein the valve member is clamped around its periphery between a generally annular housing member and the valve seat member.
Claim 8
Dependent Claim
64 words
An oscillatory pump comprising a cylinder having inlet and outlet ends, a piston having a passageway therethrough and reciprocatable within the cylinder, the piston having a valve as claimed in any preceding claim arranged to open and close the passageway in the piston, and means for effecting reciprocatory movement of the piston whereby to pump fluid from the cylinder inlet to the cylinder outlet.
Claim 9
Dependent Claim
88 words
An oscillatory pump as claimed in claim 7 wherein the cylinder has normally-closed valves of flexible material fixedly located at the inlet and outlet ends of the cylinder, the passageway in the piston having an inlet and an outlet, so that the piston allows fluid to pass from an inlet chamber formed between the inlet valve and the inlet end of the piston to an outlet chamber formed between the valve of the piston and the outlet valve in response to movement of the piston within the cylinder.
Claim 10
Dependent Claim
59 words
An oscillatory pump as claimed in either of claims 7 or 8, wherein the means for effecting reciprocatory movement of the piston within the cylinder comprises energisable means arranged when energised to move the piston in one direction within the cylinder, and return means arranged to return the piston in the opposite direction when the energisable means is de-energised.
Claim 11
Dependent Claim
36 words
An oscillatory pump as claimed in any one of claims 7 to 9, wherein at least one resilient skirt is provided on the piston to extend therearound to provide a seal between the piston and cylinder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.