US5012582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held, battery-operated rotary blade saw
Assignee: BRISTOL AND WILLIAMS BRAZORIA COUNTY TX A TX GENERAL PARTNERSHIP
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Filing: 1989-12-15
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Granted: 1991-05-07
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Expires: 2009-12-15
Abstract
Abstract A hand-held, battery-operated rotary blade saw useful for cutting plastic clips or straps which secure a face mask to a football helmet. Several configurations, having differing safety shields, are disclosed. The device is an emergency/rescue tool to quickly remove a face mask from a football helmet allowing access to the face of a football player without removal of the helmet with its concomitant risk of cervical injury.
Inventors
- 👤 Steven L. Bristol
- 👤 Joseph D. Casanueva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:22
CPC Classifications
B; B27; B27G; B27G19/00; B27G19/02; B27G19/04; B23; B23D; B23D45/00; B23D45/16; B23D47/00; B23D47/12; B23D47/126
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A hand-held, battery operated rotary blade saw comprising: a housing, batteries contained within said housing, an electro-mechanical on-off switch, a battery operated motor contained within said housing, electrical connections between the said batteries and said motor through said electro-mechanical switch, a rotor shaft extending out of said motor through said housing, a rotary saw blade attached to said rotor shaft, and a removable rotary saw blade shield which protects the rotary saw blade from inadvertent contact with objects exterior to the device; wherein: the exterior of said housing serves as a handle, and the surface of said housing provides a detachable housing access cover; and said removeable rotary saw blade shield comprises: a blade cover which is hollow and cylindrical in shape and provides both a blade cover male connector and a blade cover female connector.
Claim 2
Dependent Claim
136 words
A hand-held, battery operated rotary blade saw comprising: a housing, batteries contained within said housing, an electro-mechanical on-off switch, a battery operated motor contained within said housing, electrical connections between the said batteries and said motor through said electro-mechanical switch, a rotor shaft extending out of said motor through said housing, a rotary saw blade attached to said rotor shaft, and a removable rotary saw blade shield which protects the rotary saw blade from inadvertent contact with objects exterior to the device; wherein: the exterior of said housing serves as a handle, and the surface of said housing provides a detachable housing access cover; and said removeable rotary saw blade shield comprises: a blade cover which is hollow and cylindrical in shape and provides both a blade cover male connector and a blade cover female connector.
Claim 3
Dependent Claim
93 words
The device of claim 1 wherein: said blade cover male connector is connected to said rotor shaft and provides a male connector neck and a male connector shoulder comprised of flexible material; and wherein: said female connector is attached to the interior of said blade cover and is comprised of a female connector neck, a female connector shoulder, and a female connector bore which slideably engages said male connector neck thereby connecting said blade cover to said housing, shielding said rotary saw blade from inadvertent contact with objects exterior to said blade cover.
Claim 4
Dependent Claim
27 words
The device of claim 1 wherein: said rotary saw blade is attached to a drive shaft; and said drive shaft is slideably attached to said rotor shaft.
Claim 5
Dependent Claim
27 words
The device of claim 2 wherein: said rotary saw blade is attached to a drive shaft; and said drive shaft is slideably attached to said rotor shaft.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |