Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1997-06-26
1998-11-24
Kramer, Dean
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
294 864, 2941191, 901 37, B25J 1508
Patent
active
058397701
ABSTRACT:
A parallel gripper for use in automated material handling is designed for use both in a clean room environment and in an abrasive atmosphere. The gripper includes a housing with air operated pistons which drive slides mounted on the outside of the housing. The pistons are connected to the slides by drive bars that pass through purge chambers. These chambers may be held at a pressure that is above or below the ambient depending on the environment. A seal is placed between the slide and the housing, the seal being made of a material that has a low coefficient of friction and which will cold flow under pressure, for example, TEFLON. The gripper is assembled and the purge chamber pressurized so that normally no air passes by the seal. When a particle of dirt gets under the seal, the pressure difference across the seal drives the dirt in the desired direction: outward when the gripper is used in an abrasive environment or inward when the gripper is used in a clean room environment.
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Thompson Brian K.
Zajac Jr. Theodore S.
Kramer Dean
Zaytran Inc.
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