HARLEY EBNER KELCHNER
Engineers in Hatfield, PA
License number
Pennsylvania PE008344E
Category
Engineers
Type
Professional Engineer
Address
Address
Hatfield, PA 19440
Professional information
Apparatus For Repair Of Shatterproof Glass
US Patent:
4047863, Sep 13, 1977
Filed:
Jan 18, 1977
Appl. No.:
5/760339
Inventors:
Douglas McCluskey - Greenlane PA
Harley E. Kelchner - Hatfield PA
Harley E. Kelchner - Hatfield PA
Assignee:
Glass Medic, Inc. - Hatfield PA
International Classification:
B29C 1100
US Classification:
425 13
Abstract:
In the repair of damaged shatterproof glass by the introduction of a polymerizable liquid into a conical crack a vacuum is intermittently released and reapplied to the damaged area by means of a vacuum chamber connected to a vacuum pump through a line having an opening to the atmosphere which opening is adapted to be rapidly opened and closed by an operator's finger. The opening is threaded to receive a removable needle valve for accurate vacuum control. The vacuum chamber has a transparent end wall for viewing the work and a translucent cylindrical side wall allowing external light to illuminate the work without glare. A flexible seal in the end wall of the vacuum chamber allows a probe to be operated while the vacuum is applied. A plunger-sleeve combination, extending through the end wall is used to apply pressure to the liquid without releasing the vacuum.