Patents by Inventor Douglas R. Stahl
Douglas R. Stahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7112028Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: January 4, 2005Date of Patent: September 26, 2006Assignee: Herculift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A Hees
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Patent number: 6837665Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: October 16, 2002Date of Patent: January 4, 2005Assignee: Spiderlift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A Hees
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Patent number: 6659706Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: April 3, 2001Date of Patent: December 9, 2003Assignee: Herculift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A Hees
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Publication number: 20030086777Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: ApplicationFiled: October 16, 2002Publication date: May 8, 2003Inventors: Charles L. English, Douglas R. Stahl, William A. Hees
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Patent number: 6533524Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: April 3, 2001Date of Patent: March 18, 2003Assignee: Herculift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A Hees
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Publication number: 20010041125Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: ApplicationFiled: July 27, 1999Publication date: November 15, 2001Inventors: CHARLES L. ENGLISH, JR., DOUGLAS R. STAHL, WILLIAM A. HEES
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Publication number: 20010026754Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: ApplicationFiled: April 3, 2001Publication date: October 4, 2001Inventors: Charles L. English, Douglas R. Stahl, William A. Hees
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Publication number: 20010018016Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: ApplicationFiled: April 3, 2001Publication date: August 30, 2001Inventors: Charles L. English, Douglas R. Stahl, William A. Hees
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Patent number: 6119569Abstract: A safety device for a power saw, such as a miter saw, includes an interference stop mounted on the frame or other support of the saw. The stop prevents a lower pivotal blade guard of the saw from being pushed away from a covering relationship with respect to the saw blade when the saw is moved from a "cutting" position to a fully raised "home" position, thereby preventing accidental exposure of the saw blade.Type: GrantFiled: June 30, 1997Date of Patent: September 19, 2000Assignee: Benedict Engineering CompanyInventors: Charles E. Benedict, Douglas A. Newcomer, Gregory W. Hatcher, Timothy M. Cheek, Douglas R. Stahl
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Patent number: 6079931Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: May 22, 1998Date of Patent: June 27, 2000Assignee: Herculift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A. Hees
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Patent number: 5957649Abstract: A lift dolly is provided for lifting and transporting stand-mounted power tools and the like, with little effort. The dolly includes a pair of platforms and a wheel system having at least three castors extending downwardly from the platforms. The dolly is designed such that one step onto a latching or locking mechanism by the operator causes the wheel system to be forced downward relative to the stand thereby slightly lifting the power tool and stand off of the ground and enabling transport of same via the castors. Another step on the locking or latching mechanism disengages the wheel system and permits gravity to return the stand and tool firmly to the ground for use.Type: GrantFiled: June 23, 1997Date of Patent: September 28, 1999Assignee: Herculift Technologies, Inc.Inventors: Charles L. English, Jr., Douglas R. Stahl, William A Hees
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Patent number: 5950514Abstract: Supplemental guards are pivotally mounted on opposite sides of a conventional saw blade housing associated with miter saws. The supplemental blade guards are mounted so as to normally extend outwardly beyond the cutting blade whenever a miter saw blade is not engaged with a workpiece. The supplemental guards are positively guided as they are pivoted relative to the saw blade by contact with a workpiece as the miter saw blade is lowered to a cutting position.Type: GrantFiled: February 28, 1997Date of Patent: September 14, 1999Assignee: Benedict Engineering CompanyInventors: Charles E. Benedict, Douglas A. Newcomer, Gregory W. Hatcher, Timothy M. Cheek, Douglas R. Stahl
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Patent number: 5918522Abstract: A radial arm saw is provided with pairs of outside and inside lower blade guards which normally extend outwardly beyond the cutting blade of the saw. The lower blade guards are normally locked in covering relationship relative to the saw blade unless released by the operation of a safety lock assembly including a pair of pivotable stop members which are engageable with the lower blade guards. The safety lock assembly includes a handle for pivoting and releasing the stop members when the radial arm saw is used in a crosscutting mode and a separate release rod which extends from the forward end of the saw assembly to the rear end thereof and which is operable to release the stop members when the saw is utilized in a rip cut mode.Type: GrantFiled: June 27, 1997Date of Patent: July 6, 1999Assignee: Benedict Engineering Company, Inc.Inventors: Charles E. Benedict, Douglas A. Newcomer, Gregory W. Hatcher, Timothy M. Cheek, Douglas R. Stahl