Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8074382 | Device for guiding bundles of parallel ropes, cables, or pipes according to a three-dimensional path in an earth-digging machine A device for guiding bundles of parallel ropes, cables, or pipes according to a three-dimensional (or non-planar) path in an earth-digging machine of the type in which provided downstream of the winder assembly (9) for the ropes are at least two sets (5, 7... | 12/13/2011 |
| 7950171 | Electric mining shovel saddle block assembly with adjustable wear plates A saddle block assembly including a main body having a shipper shaft opening through the main body bottom end, and an eccentric pin opening in the main body top end, an eccentric pin received in an eccentric pin opening in the top end of the main body, and a wear pl... | 05/31/2011 |
| 7730647 | Construction machine An object of the present invention is to provide a construction machine which precipitates the removal of earth that is churned up onto a vehicle body from the vehicle body, which reduces transfer loads on a blade bracket, which improves the attachability of the bla... | 06/08/2010 |
| 7472502 | Apparatus for termination of a wire rope used for mining equipment An apparatus and method for connecting a mining dump bucket to a set of drag chains and a set of dump ropes is provided. A metallic nugget is fused to a drag rope. The metallic nugget is then inserted into a novel coupler or socket attached to a dump bucket. Also pr... | 01/06/2009 |
| 7415783 | Boom support strand oscillation dampening mechanism An apparatus including a main housing including a generally horizontal platform, a boom extending from the platform, a bucket suspended from the boom, and a mast extending from the platform. The apparatus further includes a boom support strand extending between and ... | 08/26/2008 |
| 7293375 | Crawler frame for construction machine In a crawler frame in which legs in a center frame are formed from cast steel, a simple structure is achieved by reducing the number of components. To this end, the crawler frame, which has a center frame composed of a central frame section for supporting a swing be... | 11/13/2007 |
| 7293374 | Crawler frame for construction machine A crawler frame includes a center frame and right and left track frames disposed at right and left sides of the center frame so as to extend in a back and forth direction, wherein legs for connecting a central frame section of the center frame to the track frames ar... | 11/13/2007 |
| 7258325 | Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main... | 08/21/2007 |
| 7207277 | System and method for moving objects within two-dimensional space Embodiments of the invention move objects throughout two-dimensional space by using a support rope that is coupled with both opposing sides of the platform. This rope controls the Y-axis motion and Z-axis motion of the platform and is designated the YZ movement rope... | 04/24/2007 |
| 7152349 | Dragline bucket rigging and control apparatus A large electric dragline having a housing (35) and boom (37) is provided with spaced apart in-line sheaves (34) and (36) at boom point to separate hoist ropes (31) and (32) which are led to the front and rear of bucket (... | 12/26/2006 |
| 7024806 | Auxiliary assembly for reducing unwanted movement of a hoist rope An auxiliary hoist sheave assembly comprising a sheave support frame, a mechanism for mounting the sheave support frame to a boom, a lower sheave shaft mounted on the sheave support frame, and a grooved hoist sheave, rotatably supported by and slidable along the low... | 04/11/2006 |
| 7014172 | Electric hoist The present invention is to provide an electric hoist using a suspended electric winch that maintains a horizontal posture in any cargo handling operation. A hoist in one aspect includes a winch including a drum axially connected to a drive shaft of a motor, a suspe... | 03/21/2006 |
| 6998956 | Access control system for a work vehicle A system and method for controlling access to a work vehicle includes limiting an unauthorized operator's access to the work vehicle by disabling an engine subsystem and additionally limiting access to another vehicle system such as an auxiliary fluid actuator, by d... | 02/14/2006 |
| 6910544 | Work machine arrangement In the operation of work machines of the type having an extensible arm, the maximum reach of the arm for a given work machine is limited by such factors as the vehicle's weight, body size and engine placement. The present invention provides for a work machine arrang... | 06/28/2005 |
| 6637111 | Method for making a boom of an excavator A boom body comprises a boom front member, a boom intermediate member and a boom rear member. An arm-connection bracket is jointed to the boom front member and a vehicle body-mounting bracket is jointed to the boom rear member, thereby forming a boom. Wit... | 10/28/2003 |
| 6588126 | Drag link bucket controls A dragline excavation bucket control system including a pair of hoist ropes and a drag rope, the hoist ropes being coupled adjacent opposite ends of the bucket. The hoist ropes are supported on spaced sheaves on an excavation boom whereby the hoist ropes ... | 07/08/2003 |
| 6484423 | Dragline rigging system The invention relates to a dragline rigging system (10) which includes a pair of drag lines (12) connected to drag connection points (24) on a dragline bucket (18) for dragging the bucket through material to be excavated, a pair of hoist lines (14) connec... | 11/26/2002 |
| 6385869 | Weldment bolting system including a rod bolt dowel A bolting system for securing a first weldment including two spaced apart wall members, and a cross member connected to and extending between the wall members, to a second weldment including a wall member adjacent and in face to face contact with one of t... | 05/14/2002 |
| 6314667 | Belt drive with automatic belt tensioning A belt drive including a first belt sheave having a center, the first belt sheave having a center, the first belt sheave being pivotally mounted on a member, and a motor base pivotally connected at one end to the member. The belt drive further includes a ... | 11/13/2001 |
| 6226582 | Integrated control for electric lift trucks A control system for an electric lift truck that controls a traction motor and a hydraulic pump motor is disclosed. The speed of rotation of both motors is controlled by a pulse width modulated current supplied from a battery source by the controller in d... | 05/01/2001 |
| 6168542 | Crowd rope take-up system for mining shovel A crowd rope take-up mechanism is mounted on the end of a shovel handle remote from the dipper bracket. The mechanism includes a cylinder with external screw threads engaged by a nut wheel. The cylinder mounts a sheave that received a loop of the crowd ro... | 01/02/2001 |
| 6067735 | Boom support structure for a hoist rope support sheave A machine for heavy loads comprising a rope support sheave mounted on a boom between upper and lower ends of the boom for movement between a raised position wherein the sheave supports a hoist rope above the boom and a lowered position wherein the rope su... | 05/30/2000 |
| 6023862 | Control system for rope bucket A control system for a rope bucket, the rope bucket being designed for the hoisting and transfer of materials and adapted to be suspended from a hoist trolley transferable along an essentially horizontal travel path. The control system includes a hoist me... | 02/15/2000 |
| 5992061 | Dragline bucket dump compensator A hoisting assembly for use with a dragline bucket that includes a compensator for generally stabilizing the attitude of the bucket. The compensator is operably coupled to the lift, hoist and dump lines. The connector for the lift line(s) defines a fulcru... | 11/30/1999 |
| 5970636 | Dump block An integral dump block for use in a dragline bucket that comprises a sheave to movably support a dump line, a central pin rotatably supporting the sheave, and a housing to couple the pin to lift lines. Bearings are disposed within the sheave and each side... | 10/26/1999 |
| 5822892 | Working vehicle The present invention is a working vehicle having high visibility and transportability and is capable of providing a large excavation force over a wide range. To this end, a working unit (30) is provided with a boom (31), which is divided into a first boo... | 10/20/1998 |
| 5752334 | Dumping system for a dragline bucket A draglined bucket having first and second contoured dumping rails respectively supported on first and second spaced apart opposite sidewalls and a rear wall. Each dumping rail extends from above the sidewall on which it is supported to the rear wall on w... | 05/19/1998 |
| 5642577 | Dragline with high headroom between upper and lower structures Heavy machinery comprising a lower support structure having an upper surface, and an upper structure having a generally horizontal lower surface facing the upper surface of the lower structure, the upper structure being supported above the lower structure... | 07/01/1997 |
| 5636459 | Dragline including improved boom A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a moving mechanism for moving the main housing over the ground, a boom having upper and lower ends and a rectangula... | 06/10/1997 |
| 5636460 | Dragline with cantilevered side-access dump block A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a moving mechanism for moving the main housing over the ground, a boom which is supported on the main housing and w... | 06/10/1997 |
| 5603174 | Dragline including improved walking mechanism A dragline comprising a main housing, a bucket hoist mechanism mounted on the housing, a bucket drag mechanism mounted on the main housing, a walking mechanism for moving the main housing over the ground, the walking mechanism including a motor mounted on... | 02/18/1997 |
| 5600905 | Dragline with improved pinion shaft mounting A dragline comprising a main housing, and a moving mechanism for moving the main housing over the ground, the moving mechanism including a drive mechanism mounted on the main housing, an output shaft which extends along an axis and which is driven by the ... | 02/11/1997 |
| 5575092 | Dragline bucket The dragline bucket has a basket (12) with an open from end and an open top defined by bottom, side and rear walls (14, 16, 18). Cheek plate structures (44) of fabricated steel plate construction are carried by the side walls at the front end of the baske... | 11/19/1996 |
| 5515624 | Excavating hoe or bucket An excavating hoe or bucket includes a hoe or bucket body which is movable across an excavation area, and a structure for providing the hoe body or bucket body with a variable load capacity. The variable load capacity may be provided by a network of flexi... | 05/14/1996 |
| 5471772 | Fairlead mechanism with synchronized sheaves A fairlead mechanism for guiding a dragline drag rope includes a support on the chassis of the dragline and a guide mechanism mounted on the support. The guide mechanism includes at least one pair of guide sheaves each having an annular groove. The guide ... | 12/05/1995 |
| 5428909 | Dump bucket arch A bucket arch, used on dragline buckets, has a pair of side sections and an arch center section disposed therebetween. At least one lug is attached to the arch center section and exerts a force on the center section along a force axis. In the improvement,... | 07/04/1995 |
| 5398396 | Method and apparatus for withdrawing a machine shaft The new method relates to a machinery assembly having (a) a housing, (b) an eccentric confined in the housing, (c) a shaft extending into the eccentric and (d) a shaft axis of rotation. A method for moving the shaft with respect to the housing includes th... | 03/21/1995 |
| 5398433 | Bucket dump block A bucket dump block, used on dragline buckets, has side frames and a rotatable rope-guiding sheave. In the improvement, each side frame has a separate ring-like support section extending toward the other side frame and abutting the support section of such... | 03/21/1995 |
| 5367798 | Connector pin assembly for bucket rigging A dragline bucket rigging includes at least one pair of components removably secured together by a connector pin assembly including a U-shaped spring retainer clip. The clip removably snap-fits beneath a protective cap secured to the outside face of one o... | 11/29/1994 |
| 5349766 | Boom support pendant pin retainer A boom support pendant pin retainer for an earth working machine having a retainer plate and a projection for preventing rotational, axial and coaxial movement of the pendant pin. The projection is constructed and arranged to mesh in the void between the ... | 09/27/1994 |
