The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 1979
Filed:
Apr. 11, 1978
Applicant:
Inventor:
Roland W Rubertus, New Brighton, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
E06B / ;
U.S. Cl.
CPC ...
49141 ; 49 49 ;
Abstract
A gate for controllably inhibiting passage through a controlled zone which includes a rotating arm, the rotation of which may be prevented by a solenoid-coupled pawl which engages a gear-like multiposition detent member coupled to a shaft on which the arm is mounted. In the event excessive force is applied to the arm when thus locked to enable emergency egress, a clutch allows rotation of the shaft, and of the arm, with respect to the detent member. The arm may be automatically repositioned to enable a new position about the periphery of the detent member to become engageable by the pawl.