Frost plug heater
US4851640A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The clamping mechanism for securing in place an electric heating element insertable through a frost plug aperture into the coolant passage in the blocks of a water cooled internal combustion engine includes a screw having a head located on the outside of a removable body member carrying the heating element, which body member is adapted to be inserted into the apertures to sealingly close it against leakage. The inner end of the screw extends freely through an opening formed in a bight portion connecting a pair of opposed side walls of a rigid yoke having a length greater than the largest dimension of the aperture and adapted to engage the inner surface of the block around the aperture and is threaded into a nut loosely captivated within the yoke by the bight portion, side walls and detents extending inwardly from the side walls and overlying the bight portion. The yoke opening is so sized and the detents are so arranged that the rigid yoke may be tilted about the screw to enter the block through the aperture. The screw head is shaped to be engageable by a socket driven by a power tool, such as an electric or pneumatic screw driver, for rotating the screw to tighten the clamping mea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.