Pump body with plunger pistons

• US 7,658,597 B2
• Filed: 07/14/2005
• Issued: 02/09/2010
• Est. Priority Date: 08/02/2004
• Status: Active Grant

• Current Assignee: Annovi Reverberi SpA
• Original Assignee: Annovi Reverberi SpA
• Inventors: Rocchi, Alberto, Reverberi, Stefano
• Primary Examiner(s): Kramer; Devon C
• Assistant Examiner(s): Stimpert; Philip
• Application Number:
  US11/180,633
• Publication Number:
  US 20060024173A1
• Time in Patent Office: 1,671 Days
• Field of Search: 417/360, 92/71
• US Class Current: 417/269
• CPC Class Codes: F04B 1/141 Details or component parts
• CPC Class Codes: F04B 1/143 Cylinders
• CPC Class Codes: F04B 1/145 Housings

Abstract

Pump with plunger pistons comprising a head (1) in which are formed the intake and delivery ducts (2, 3) and the respective intake and delivery valves, a pump body (4) associated with said head (1) in which drive means (8) of at least one piston (6), and attachment and support means (5) of said pump body (4) at a body of the drive motor are situated, where said pump body (4) has, on the bottom wall (40), the seats (41) for the sliding of the pistons (6) and directly carries said attachment and support means (5) of the body of the drive motor and it is completely open on the edge facing towards the motor.

Claims

1. Pump with at least one plunger piston (6) comprising:

a head (1) in which are formed intake and delivery ducts (2, 3) and respective intake and delivery valves,

a cup shaped pump body (4) formed in one piece having a bottom wall and a completely open end opposite the bottom wall associated with said head (1),

a drive means (8) for driving said at least one plunger piston (6) and received in the pump body through said completely open end,

wherein the pump body comprises attachment and support means (5) for attaching said pump body (4) to a body containing a drive motor for the pump,

wherein said bottom wall (40) comprises at least one seat (41) for the sliding of said at least one plunger piston (6),

wherein said open end of said pump body faces towards said motor, and

wherein said pump body has an inner peripheral dimension that is transverse to a longitudinal axis of said drive means and is at a maximum at the open end.

2. Pump according to claim 1, wherein said drive means comprise a rotating inclined plate (8) having a hollow tang (81).

3. Pump according to claim 2, wherein a bearing (9) is arranged between said hollow tang (81) and said pump body (4).

4. Pump according to claim 3, wherein said bearing (9) is kept in position by an elastic ring (91) that axially locks the bearing (9) with respect to the pump body (4).

5. Pump according to claim 3, wherein said pump body (4) is isolated from the outside through a gasket (10) arranged between the pump body (4) and the hollow tang (81).

6. Pump according to claim 1, wherein said attachment and support means comprise a plurality of brackets (5) canti-levered from said pump body (4).

7. A pump having at least one plunger piston comprising:

a pump head;

intake and delivery ducts and respective intake and delivery valves formed in the head;

a one piece cup-shaped pump body associated with said pump head, said pump body comprising a bottom wall and a completely open end opposite said bottom wall;

drive means, contained within said pump body and connected to drive said at least one plunger piston;

attachment and support means connected to said pump body for attaching said pump body to a body containing a drive motor for the pump; and

at least one seat formed in the bottom wall of said one piece cup-shaped pump body, in which said at least one plunger piston slides,

wherein said pump body directly carries said attachment and support means and said completely open end opposite to said bottom wall opens towards said motor to receive said drive means, and

wherein said pump body has an inner peripheral dimension that is transverse to a longitudinal axis of said drive means and is at a maximum at the open end.