EP0253602A2 - Pompes - Google Patents

Pompes Download PDF

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Publication number
EP0253602A2
EP0253602A2 EP87306166A EP87306166A EP0253602A2 EP 0253602 A2 EP0253602 A2 EP 0253602A2 EP 87306166 A EP87306166 A EP 87306166A EP 87306166 A EP87306166 A EP 87306166A EP 0253602 A2 EP0253602 A2 EP 0253602A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
outlet
pump
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87306166A
Other languages
German (de)
English (en)
Other versions
EP0253602A3 (fr
Inventor
Anthony Stephen Markham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARKHAM (SHEFFIELD) Ltd
Original Assignee
MARKHAM (SHEFFIELD) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MARKHAM (SHEFFIELD) Ltd filed Critical MARKHAM (SHEFFIELD) Ltd
Publication of EP0253602A2 publication Critical patent/EP0253602A2/fr
Publication of EP0253602A3 publication Critical patent/EP0253602A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports

Definitions

  • This invention relates to pumps.
  • the object of the present invention is to provide a pumping means for viscous and/or low flow characteristic materials, which has the advantage that it can readily be used as a means of applying such materials at a point of usage, and is equally capable of pumping materials of low viscosity and/or high flow characteristic materials.
  • a pump comprises a cylinder, a piston within the cylinder, an inlet to the cylinder part-way along its length, said inlet being opened and closed by reciprocation of the piston within the cylinder, an outlet from the cylinder and valve means at the outlet from the cylinder that is open during a drive stroke and closed during a return stroke of the piston.
  • the valve may be spring loaded towards the closed position or a ball drawn to the closed position during the return stroke of the piston.
  • the valve means is located within a discharge member secured to the outlet from the cylinder.
  • the piston is activated by any suitable mechanical, hydraulic, or pneumatic means.
  • the piston On its first drive stroke, the piston passes across and closes the inlet to the cylinder, further travel of the piston compressing air trapped in the cylinder causing the valve to open to expel the trapped air.
  • the material is forced along the cylinder to open and progress beyond the valve and into the discharge member.
  • material can be pumped efficiently and at substantially any desired rate by controlling the rate of reciprocation of the piston.
  • the invention can therefore be used as a pump to transport material to a required location, e.g. by securing a delivery line to the end of the discharge member. It can equally be used as a means of applying material at a point of use, e.g. it can be used as a pressure discharge gun or grouting gun, and when a suitable nozzle would be secured to the end of the discharge member.
  • the further advantage of the invention is that by its nature it can handle high viscosity materials with poor flow characteriseics, and can handle equally well low viscosity, highly flowable materials, and could be used efficiently as, e.g. a wet spraying gun, with the selection of a suitable rate of reciprocation of the piston.
  • a pump 1 consists of a cylinder 2 within which is a reciprocable piston 3, the connecting rod 4 of which extends to any suitable drive means that can be mechanically, hydraulically or pneumatically activated.
  • the cylinder 2 has an inlet 5 to which can be attached a suitable supply line for material to be pumped, and an outlet 6 to which is secured a discharge member 7 and to which can be attached a suitable delivery line for pumped material.
  • the operation of the pump is essentially the same.
  • the piston On its first drive stroke, the piston compreses the air in the cylinder and drives it out of the cylinder past the valve 9 or 11.
  • the piston On its return stroke, the piston creates a vacuum in the cylinder causing the valve 9 or 11 to close the outlet 6, and as the pistonprogressivelyes beyond the inlet 5, material is drawn into the cylinder, to be picked up by the piston on its next drive stroke to be driven towards and through the valved outlet from the cylinder.
  • Continued reciprocation of the piston 3 thus causes a rapid succession of batches of material being first drawn into the cylinder and then driven through the valved outlet and through the dicharge member, to be progressed along the supply line as a substantially continuous stream.
  • a principal advantage of the invention is its ability to handle materials of high viscosity and poor flow characteriastics, and serves ideally as a pump for the supply of grouting material to a grouting gun secured to the end of the supply. It is however equally so that the pump can handle low viscosity highly flowable material when required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP87306166A 1986-07-15 1987-07-13 Pompes Withdrawn EP0253602A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8617238 1986-07-15
GB868617238A GB8617238D0 (en) 1986-07-15 1986-07-15 Pumps

Publications (2)

Publication Number Publication Date
EP0253602A2 true EP0253602A2 (fr) 1988-01-20
EP0253602A3 EP0253602A3 (fr) 1989-03-15

Family

ID=10601090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87306166A Withdrawn EP0253602A3 (fr) 1986-07-15 1987-07-13 Pompes

Country Status (2)

Country Link
EP (1) EP0253602A3 (fr)
GB (1) GB8617238D0 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528254A (fr) * 1966-06-22 1968-06-07 Bucher Guyer Ag Masch Pompe à pistons axiaux
FR2061900A5 (fr) * 1969-10-01 1971-06-25 Citroen Sa
FR2379712A1 (fr) * 1977-02-03 1978-09-01 Jules Michel Dispositif d'injection periodique d'un produit liquide ou pateux, en particulier d'un produit de graissage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528254A (fr) * 1966-06-22 1968-06-07 Bucher Guyer Ag Masch Pompe à pistons axiaux
FR2061900A5 (fr) * 1969-10-01 1971-06-25 Citroen Sa
FR2379712A1 (fr) * 1977-02-03 1978-09-01 Jules Michel Dispositif d'injection periodique d'un produit liquide ou pateux, en particulier d'un produit de graissage

Also Published As

Publication number Publication date
GB8617238D0 (en) 1986-08-20
EP0253602A3 (fr) 1989-03-15

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Effective date: 19890916

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Inventor name: MARKHAM, ANTHONY STEPHEN