CONNECTING ROD AND PISTON FOR AN OIL-LESS PNEUMATIC MOTOR

• US 20160160645A1
• Filed: 12/04/2015
• Published: 06/09/2016
• Est. Priority Date: 12/05/2014
• Status: Active Grant

• Current Assignee: Circle Dynamics Inc.
• Original Assignee: Circle Dynamics Inc.
• Inventors: Doyle, James Laurence
• Granted Patent: US 10,408,058 B2
• Time in Patent Office: Days
• CPC Class Codes: F01B 9/02 with crankshaft
• CPC Class Codes: F16C 7/00 Connecting-rods or like links pivoted at both ends coupling-rods for locomotive driving-wheels B61C17/10; Construction of connecting-rod heads heads rigid with crossheads F16C5/00
• CPC Class Codes: F16C 7/023 for piston engines, pumps or the like
• CPC Class Codes: F16J 1/22 with universal joint, e.g. ball-joint

Abstract

A connecting rod and piston assembly for use in an oil-less pneumatic motor, wherein said connecting rod and piston do not require a wrist pin for connecting said rod to said piston; said connecting rod having at least two ends, connected to each other by a connecting member of a predetermined length; said at least two ends being a piston end and a crankshaft end; said piston end being distant said crankshaft end; said piston having a cylinder end and a connecting rod piston end receiving end, wherein said connecting rod piston end receiving end matingly engages said connecting rod piston end; said piston end is substantially ball shaped and said crankshaft end is shaped for engagement with a crankshaft; said connecting rod piston end receiving end is a socket shape to matingly receive said ball shaped piston end.

Claims

1. A connecting rod and piston assembly for use in a oil-less pneumatic motor;

said connecting rod comprising at least two ends, connected to each other by a connecting member of a predetermined length;

said at least two ends comprising a piston end and a crankshaft end;

said piston end being distant said crankshaft end;

said piston comprising a cylinder end and a connecting rod piston end receiving end, wherein said connecting rod piston end receiving end matingly engages said connecting rod piston end;

said piston end being substantially ball shaped and said crankshaft end shaped for engagement with a crankshaft;

said connecting rod piston end receiving end being substantially socket shaped for matingly receiving said ball shaped piston end.

2. The connecting rod and piston assembly of claim 1 wherein said assembly is made of a material selected from the group consisting of plastic pellets combined with oil;

oil encapsulated plastic pellets;

acetal resin;

nylon plastic;

polytetrafluoroethylene filled Delrin®

;

Turcite®

;

oil filled cast nylon 6;

MDS (molybdenum disulphide) filled nylon 6; and

combinations thereof.

3. The assembly of claim 1 wherein said crankshaft end is arcuate shape and said connecting rod piston end receiving end further comprises a piston seal, for sealing said connecting rod piston end in said piston.

4. The assembly of claim 3 wherein said piston seal is made of a material is selected from the group consisting of Buna-N (nitrile rubber);

fluoroelastomer;

EPDM (ethylene propylene diene monomer) rubber;

perfluoroelastomer;

polytetrafluoroethylene;

polyurethane and combinations thereof.

5. The assembly of claim 3 wherein said piston further comprises a sleeve seal for sealing said piston in a cylinder sleeve.

6. The assembly of claim 5 wherein said sleeve seal is made of a material selected form the group consisting of urethane;

UHMW (ultra-high molecular weight) polyethylene;

fluoroelastomer;

Buna-N; and

combinations thereof.

7. The assembly of claim 6 wherein said piston is substantially cylindrical in shape, for engagement with said cylinder sleeve and made of a material selected from the group consisting of plastic pellets combined with oil, preferably mineral oil;

oil encapsulated plastic pellets, such as but not limited to oil impregnated nylon;

acetal resin (preferably acetal homopolymer resin such as Delrin®

);

nylon plastics (preferably Nylatron®

, more preferably Nylatron®

GSM (oil filled nylon));

polytetrafluoroethylene filled Delrin®

;

Turcite®

;

oil filled cast nylon 6;

MDS (molybdenum disulphide) filled nylon 6; and

combinations thereof.

8. The assembly of claim 7 wherein when said connecting rod is connected to said piston, said piston end is matingly engaged with said piston allowing for a pendulum movement of said connecting rod in said piston in at least two planes.

9. The assembly of claim 8 wherein said pendulum movement is greater than two planes.

10. An oil-less pneumatic motor comprising the assembly of any of claim 8.

11. Use of a connecting rod and piston assembly of claim 1 in an oil-less pneumatic motor.

12. The assembly of claim 1 with the proviso of no wrist pin in said assembly.

13. The assembly of claim 1 or 2 wherein said crankshaft end is arcuate shape and said connecting rod piston end receiving end further comprises a retainer, for retaining said connecting rod piston end in said piston.

14. The assembly of claim 13 wherein said assembly further comprises a retainer lock for locking said retainer in place with said piston.

15. The assembly of claim 14 wherein said retainer further comprises a guide allowing for a pendulum movement of said connecting rod in said piston in at least two planes.

16. The assembly of claim 15 wherein said retainer further comprises a slot for engaging with said connecting rod.