X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta05-srv.alltel.net ([166.102.165.166] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 886733 for flyrotary@lancaironline.net; Sat, 17 Dec 2005 22:38:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.166; envelope-from=montyr2157@alltel.net Received: from Thorstwin ([4.226.237.5]) by ispmxmta05-srv.alltel.net with SMTP id <20051218033808.GNAC8731.ispmxmta05-srv.alltel.net@Thorstwin> for ; Sat, 17 Dec 2005 21:38:08 -0600 Message-ID: <002c01c60384$7cb3ea90$05ede204@Thorstwin> From: "Monty Roberts" To: Subject: 90-91 oil injection pump Date: Sat, 17 Dec 2005 21:38:17 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0029_01C60352.31728C30" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0029_01C60352.31728C30 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Monty let me try to explain it in general terms. Unfortunately, I do not = have any detailed pictures. The pump is working on the positive displacement principle. It has a = piston-cylinder combination with in-out port control. The port sequence = is achieved by rotating the piston in such a way that the intake is open = on the way down, and the outlet is open on the way up. The stepper motor = controls the stroke for more or less pumping. Here are the physicals. The drive shaft turns the piston through a 1:1 = worm-angle gear. The piston has a wedge type cut out on the bottom side = which is sitting on a cross pin, spring loaded. When the piston turns, = it moves up and down, in and out from the pin. I do not know exactly how = the control pin is hooked to the piston. I am at this moment making a replacement for the stepper motor, to do = what you described. I believe the pin is at maximum when it is pushed = in, however, I will have a test run on the pump with my adjuster = shortly, and we will know for sure. I have the same adjustment gadget, in principle, for the RENESIS pump, = ready to sell. Hope this helps. Richard Sohn N-2071U Thanks Richard, I thought that the pump was at max output with the plunger depressed, = just wasn't sure. Let us know how your tests go. Looks like the plunger = covers the return port when it is fully depressed. If I understand the = &%$#@ thing properly. Seems terribly complicated for the task. Should be = a simpler way to do things. Why not use a gerotor with a variable = bypass? Less parts. Why go from rotary to reciprocating motion. I can't = believe that the manufacturing guys could not come up with some powdered = metal gerotor gears and a stepper actuated needle valve for less $$$ = than this Rube Goldberg nonsense! BAHHHH! Monty ------=_NextPart_000_0029_01C60352.31728C30 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Monty let me try to = explain it in=20 general terms. Unfortunately, I do not have any detailed = pictures.

The pump is working on = the positive=20 displacement principle. It has a piston-cylinder combination with in-out = port=20 control. The port sequence is achieved by rotating the piston in such a = way that=20 the intake is open on the way down, and the outlet is open on the way = up. The=20 stepper motor controls the stroke for more or less pumping.

Here are the physicals. = The drive=20 shaft turns the piston through a 1:1 worm-angle gear. The piston has a = wedge=20 type cut out on the bottom side which is sitting on a cross pin, spring = loaded.=20 When the piston turns, it moves up and down, in and out from the pin. I = do not=20 know exactly how the control pin is hooked to the piston.

I am at this moment = making a=20 replacement for the stepper motor, to do what you described. I believe = the pin=20 is at maximum when it is pushed in, however, I will have a test run on = the pump=20 with my adjuster shortly, and we will know for sure.

I have the same = adjustment gadget, in=20 principle, for the RENESIS pump, ready to sell.

Hope this = helps.

Richard = Sohn

N-2071U

Thanks Richard,

I thought that the pump was at max output = with the=20 plunger depressed, just wasn't sure. Let us know how your tests go. = Looks like=20 the plunger covers the return port when it is fully depressed. If I = understand=20 the &%$#@ thing properly. Seems terribly complicated for the = task.=20 Should be a simpler way to do things. Why not use a gerotor with a = variable=20 bypass? Less parts. Why go from rotary to reciprocating motion. I can't = believe=20 that the manufacturing guys could not come up with some powdered metal = gerotor=20 gears and a stepper actuated needle valve for less $$$ than this Rube = Goldberg=20 nonsense! BAHHHH!

Monty

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