US 8,939,051 B1Granted

Extension tool

OwnerRobert G. Lofley, Sr., Robert G. Lofley, Jr.inventors

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Abstract

An extension tool is disclosed comprising a first pole and a second pole. The second pole is partially disposed in the first pole for defining a variable overall tool length. A slide controller includes a lower clamp and an upper clamp. The first pole is disposed in the lower clamp. A first clamp compressor applies a compressive force to the lower clamp for defining a lower clamp lock and coupes the slide controller with the first pole. A second clamp compressor applies a compressive force to the upper clamp for defining an upper clamp lock and prevents slidable displacement of the second pole relative to the first pole. The second clamp compressor applies a non-compressive force to the upper clamp for defining an upper slide guide. The upper slide guide facilitates the slidable displacement of the second pole relative to the first pole.

Claims15

Dependent claims

An extension tool, comprising:

a first pole defining an interior bore and a first exterior surface with said first pole extending between a first end and a second end;
a second pole defining a second exterior surface with said second pole extending between a first end and a second end;
said second pole being partially disposed in said first pole for defining a variable overall tool length;
a slide controller including a lower clamp and an upper clamp;
said lower clamp having a primary arm and a secondary arm for defining a first coupler interior bore;
said upper clamp having a primary arm and a secondary arm for defining a second coupler interior bore;
said second end of said first pole disposed in said first coupler interior bore of said lower clamp;
a first clamp compressor extending between said primary arm and said secondary arm of said lower clamp and applying a compressive force between said primary arm and said secondary arm for defining a lower clamp lock and coupling said slide controller with said first pole;
a second clamp compressor extending between said primary arm and said secondary arm of said upper clamp and applying a compressive force between said primary arm and said secondary arm for defining an upper clamp lock and preventing slidable displacement of said second pole relative to said first pole;
said second clamp compressor applying a non-compressive force between said primary arm and said secondary arm for said upper clamp defining an upper slide guide;
said upper slide guide facilitating the slidable displacement of said second pole relative to said first pole;
a bushing defining an internal bore and an exterior surface;
said first end of said second pole disposed and coupling to said internal bore of said bushing;
said exterior surface of said bushing slidably engaging with said interior bore of said first pole for defining a lower slide guide;
and
said lower slide guide and said upper slide guide facilitating the slidable displacement of said second pole relative to said first pole.

13 more elements

An extension tool for engaging a railroad car, the railroad car including a plurality of wheels for rotatably engaging along a rail system, the plurality of wheels supporting a container, a brake engaging the plurality of wheels for terminating rotation of the plurality of wheels, a wheel brake rotatably coupling to the railroad car, a brake linkage coupling the wheel brake with the brake, the brake compressing or expanding relative to the plurality of wheels upon rotating the wheel brake, the extension tool comprising:

a first pole defining an interior bore and a first exterior surface with said first pole extending between a first end and a second end;
a second pole defining a second exterior surface with said second pole extending between a first end and a second end;
a bushing defining an internal bore and an exterior surface;
said first end of said second pole disposed and coupling, to said internal bore of said bushing;
said second pole being partially disposed in said first pole with said exterior surface of said bushing slidably engaging with said interior bore of said first pole for defining a lower slide guide;
a slide controller including a lower clamp and an upper clamp;
said lower clamp having a primary arm and a secondary arm for defining a first coupler interior bore;
said upper clamp having a primary arm and a secondary arm for defining a second coupler interior bore;
said second end of said first pole disposed in said first coupler interior bore of said lower clamp;
a first clamp compressor extending between said primary arm and said secondary arm of said lower clamp and applying a compressive force between said primary arm and said secondary arm for defining a lower clamp lock and coupling said slide controller with said first pole;
a second clamp compressor extending between said primary arm and said secondary arm of said upper clamp and applying a compressive force between said primary arm and said secondary arm for defining an upper clamp lock and preventing slidable displacement of said second pole relative to said first pole;
said second clamp compressor applying a non-compressive force between said primary arm and said secondary arm for said upper clamp defining an upper slide guide;
Said lower slide guide and said upper slide guide facilitating the slidable displacement of said second pole relative to said first pole;
a tool head having a mounting portion and a working portion;
said mounting portion defining a mounting bore and an exterior mounting surface;
said second end of said second pole disposed in said mounting bore of said tool head for coupling said second pole to said tool head;
said working portion including a plate extending from said exterior mounting surface of said mounting portion;
said plate defining a first side, a second side, a top edge, a side edge and a bottom edge;
said top edge engaging the wheel brake of the railroad car for transferring a pushing force from said tool head to the wheel brake and causing a rotation;
and
said bottom edge engaging the wheel brake of the railroad car for transferring a pulling force from said tool head to the wheel brake and causing a rotation.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/374,200Filed 15 Dec 2011 · us provisional application
Priority: 16 Dec 2010
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B25G 1/04
Handle constructions: telescopic; extensible; sectional
B61H 13/02
Actuating rail-vehicle brakes: hand or other personal actuation
F16B 7/1418
Locking in intermediate non-discrete positions: with a clamping collar or two split clamping rings tightened by a screw or a cammed latch member
F16B 7/1472
Locking in intermediate non-discrete positions: with a clamping screw perpendicular to the axis of the telescoping members