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:
Jan. 31, 1995
Filed:
Jun. 29, 1994
Kevin F Clancy, Cypress, TX (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
A low profile keyswitch having bearing surfaces on both the inside and outside of the plunger of the keycap member is disclosed. The key switch includes a one-piece switch chimney having a cylindrical upright member, a plurality of arcuate ribs positioned coaxially inwardly of the cylindrical member along with a membrane support member. The chimney receives the cylindrical plunger between the cylindrical member and the ribs to provide bearing surfaces on the plunger closest to the keycap member actuation point to minimize friction when the keycap member is depressed offcenter thereby reducing binding of the keyswitch. A plurality of equidistance upstops are disposed on the lower-end of the plunger to reduce wobble of the keycap member in the extended position.