| US 7,565,886 B2 | ||
| Two-stroke internal combustion engine | ||
| Bo Carlsson, Floda (Sweden); Roy Ekdahl, Floda (Sweden); and Hans Strom, Kode (Sweden) | ||
| Assigned to Husqvarna AB, Huskvarna (Sweden) | ||
| Filed on Apr. 03, 2006, as Appl. No. 11/278,539. | ||
| Application 11/278539 is a continuation of application No. 09/952383, filed on Sep. 14, 2001, granted, now 7,082,910. | ||
| Application 09/952383 is a continuation in part of application No. 09/483478, filed on Jan. 14, 2000, granted, now 7,025,021. | ||
| Claims priority of application No. 9900138 (SE), filed on Jan. 19, 1999; application No. PCT/SE00/00058 (WO), filed on Jan. 14, 2000; and application No. PCT/SE00/00059 (WO), filed on Jan. 14, 2000. | ||
| Prior Publication US 2006/0169225 A1, Aug. 03, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F02B 33/00 (2006.01) | ||
| U.S. Cl. 123—73PP [123/73 FA] | 17 Claims |
| 1. A crankcase scavenged two-stroke internal combustion engine configured to facilitate fluid flow from an air inlet duct
to a scavenging duct, said engine comprising:
a piston arranged within a cylinder and configured for reciprocating motion therein; an air inlet duct penetrating said cylinder
and terminating in an air inlet port at an interior cylinder wall and a scavenging duct penetrating said cylinder and terminating
in a scavenging port at said interior cylinder wall, said air inlet port located proximate said scavenging port at said interior
cylinder wall;
said piston having a recess located in an exterior surface thereof, said recess positioned on said exterior surface of said
piston so that said recess comes into common registration with said air inlet port and said scavenging port and thereby establishes
a flow channel extending from said air inlet duct, through said air inlet port, across said recess, through said scavenging
port and into said scavenging duct; and
said flow channel configured to permit straight-line flow from said air inlet duct to said scavenging duct.
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