Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7347276 | Adjustable garden tool A manual garden tool having an elongate shaft with an actuator rotatably mounted at its lower end, tine(s) mounted to the actuator, and a cam surface at the lower end of the shaft in contact with a surface of each tine such that, as the actuator is rotated between t... | 03/25/2008 |
| 7306051 | Gear transmission device for power tool A gear transmission device for a power tool. The device transmits rotation of an input shaft to an output shaft, which are coaxially rotated. The input shaft includes a distal portion, and the output shaft includes a basal portion facing towards the distal portion o... | 12/11/2007 |
| 7261152 | Cable drawn snubbing apparatus A cable drawn snubbing apparatus includes a first track and a second track in parallel spaced relation. A carriage extends between and engages the first track and the second track. Pipe engaging slips are carried by the carriage. Upper cables extend from the carriag... | 08/28/2007 |
| 7191853 | Hole cleaning and/or forming tool A tool for cleaning and/or forming holes, the tool having a shaft, the shaft having a lower end and at least two buckets attached adjacent to the lower end of the shaft, each bucket having an open mouth which extends radially from the axis of the shaft, consequently... | 03/20/2007 |
| 6951254 | Soil manipulating tool A soil manipulating tool is disclosed which has a handle (12) and a soil penetrating portion (14). The soil penetrating portion (14) is formed from a helical or spiral rod or wire (13) which defines a cavity (18). The rod or wire (... | 10/04/2005 |
| 5388654 | Ground-boring device A ground-boring device with a ground auger, which features a boring spindle driven by an engine-transmission unit. A framework is provided with a travelling gear. On the grip ends of the framework is provided a handgrip arrangement located during operatio... | 02/14/1995 |
| 5090486 | Multi-purpose earth drill The multipurpose earth drill is tractor mountable with hydraulic operators to allow using the weight of the tractor for downward pressure on an extensible shaft earth drill which may be an auger or rack bit, the drill being rotated using an extensible sha... | 02/25/1992 |
| 4932481 | Roof bolt drill support A mining roof bolt drill feed mechanism whereby the drill is supported on a horizontal pylon extending from an elongate slot in a vertical box section inner strut. The inner strut telescopes within an outer box section strut with an aligned elongate slot,... | 06/12/1990 |
| 4875529 | Alternate forms of, side drive drilling Disclosed is a method and apparatus comprising a side drive system with a drive shaft (24, 24a) driven from the platform level (10) and powering a drilling unit (16) for rotating drill pipe (14). Except for the tethering of the drive shaft at the top of t... | 10/24/1989 |
| 4312413 | Drilling apparatus Drilling apparatus embodying an elongated boxed-in frame supporting a transmission unit for longitudinal movement therein with the transmission unit connecting a polygonal drive shaft to a driven head which is threadedly connected to a drill rod section. ... | 01/26/1982 |
| 4296820 | Drilling apparatus Drilling apparatus embodying an elongated frame supports a transmission unit for longitudinal movement therein. The transmission unit carries a drive head slidably driven by a polygonal, parallel drive shaft and is threadedly connected to one end of a dri... | 10/27/1981 |
| 4190119 | Earth drilling apparatus An earth drilling method and apparatus utilizes a unique drill string rotary drive and support arrangement which provides for the utilization of longer drill strings than could heretofore be accommodated on prior art drill masts of equal height.... | 02/26/1980 |
| 4116284 | Earth drills An earth auger arrangement wherein a power source is mounted on wheels for moving the power source over the earth's surface with means connected to the power source for relaying power to a transmission with which an auger is connected. Handle means are co... | 09/26/1978 |
| 4057114 | Hand-held ice auger A flexible shaft is connected directly to the crank shaft of a snowmobile engine by a coupler. The flexible shaft drives a reduction gear which is enclosed in a hand-held housing. The reduction gear rotates a drive shaft at a substantially reduced speed a... | 11/08/1977 |
| 3976147 | Auger A safety earth auger is employed for forming post holes and in similar uses. The auger is supported pivotally beween elongated handles and is driven from an engine mounted on a remote frame. The frame has ground wheels which provide for stability during o... | 08/24/1976 |
