Quick change mechanism for diamond arbor circular saw blades and other spinning disc devices using radially sliding locks
US4787147A · kind A · utility
Inventor
Key dates
| Filing date | Aug 28, 1986 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Aug 28, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9379
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This quick change mechanism is a single bolt-on attachment for standard hand held power driven circular saws, to thereafter quickly install and remove diamond arbor saw blades without using any tool. A disc with a raised protruding center body is shaped to fit a standard diamond center blade, which when pressed down over this center body, is centered flat against the upper surface of the disc. The blade is then locked in place by expanding opposite undercut sections, which include the two closest points of the diamond. These expanding sections have undercut slots just above the upper disc surface and serve to wedge the blade down when moved radially outward. These resulting two wedging and sliding locks of the undercut sections are integral with radially sliding members, which move in and out in complementary "V" slots cut into the blade holding disc. Two coil springs inset in cavities drilled into the inside edges of the wedging and sliding locks exert constant outward pressure on these wedging and sliding locks. When the drive shaft is rotating, this locking outward pressure is significantly increased by centrifugal force. A spiral lock ring is inset on the outer diameter surface…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.