Wells – Above ground apparatus – Cap or head pivotably attached to tube or casing
Patent
1995-08-22
1997-06-24
Tsay, Frank
Wells
Above ground apparatus
Cap or head pivotably attached to tube or casing
166 931, E21B 3302
Patent
active
056410174
ABSTRACT:
An internal lock assembly securely locks a monitor well lid and cover to protect and safeguard the monitor well so as to enhance the monitor well's accuracy and environmental compliance. The user friendly lock assembly has a special latch which engages a padlock in a housing. A restraining bar across the front end of the housing restricts movement of the padlock's shackle. The internal housing can be supported by a mounting brace.
REFERENCES:
patent: 2179191 (1939-11-01), McWilliams
patent: 3782146 (1974-01-01), Franke
patent: 4848458 (1989-07-01), Holdsworth et al.
patent: 4881597 (1989-11-01), Hensley
patent: 4971149 (1990-11-01), Roberts
Drake Charles
Tolpin Thomas W.
Tsay Frank
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