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:
Dec. 05, 1989
Filed:
Dec. 08, 1987
Richard S Sanders, Houston, TX (US);
Intermedics, Inc., Angleton, TX (US);
Abstract
A cardiac pacemaker pulse generator is adapted to .generate electrical stimuli at a first pacing rate, and to selectively increase the rate to a second higher pacing rate. A timer triggers the rate increase to establish the higher rate as an exercise rate folloing the passage of a preset period of time after the timer is enabled. An external magnet controlled by the patient activates a reed switch to enable the timer to commence timing. The pulse generator is further adapted to respond to a second pass of the magnet over the reed switch after enabling of the timer to thereupon disable the timer before the preset period of time has expired. If the second pass of the magnet occurs after the exercise rate has begun, the element for increasing the rate is disabled to return the pulse generator to the lower pacing rate. The change in pacing rates is made in steps.