Boring tool
US11045880B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jul 11, 2018 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Jul 11, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2270/24
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a undercutting boring tool (10) comprising a bar body (11). A lost motion link consists of a spring (26) selectively compressed by a lost motion rod (27) having a lost motion slot (33) spaced from a drive pin (34). An operating rod portion (36) has a trunnion body (37) at its front end having a pin (41) adapted to engage the lost motion slot (33). A tool carrier (42) forms a pair of spaced flat tines (43) and forms a bearing surface (44) in the bight. The upper tine (43) and the bearing surface (44) section are slotted at (45) to allow the passage of a control link (46). Apertures (47) in the tines (43) engage pins (50) on the trunnion body (37). The bar of a generally H-shaped tool assembly (52) comprises a bearing surface (53) running in the bearing surface (44). A crank portion (54) is connected to the control link (46) via crank pin (55). Drive pins (61) and (62) engage the tool assembly (52) with the end face of the bar body (11) providing positive engagement resisting rotational forces in use. The arrangement allows for post-insertion rotation of the tool assembly (52) from an aligned to a transverse (working) position before engagement of the drive pins (61…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.