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:
Mar. 16, 1993
Filed:
Jun. 10, 1991
Applicant:
Inventors:
Hugh F Taylor, Sawston, GB;
David R Theobald, St. Ives, GB;
Assignee:
Utec B.V., , NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F41B / ;
U.S. Cl.
CPC ...
124 67 ; 124 65 ;
Abstract
A gas spring airgun in which the power system comprises a main cylinder which contains a piston and a hollow dummy piston. The piston is a sliding fit within the main cylinder while the dummy piston is fixed relative to the main cylinder, and is of considerably small diameter. A collar is located in the space between the dummy piston and the piston and is substantially fixed relative to the piston and slidable relative to the dummy piston, when the system is pressurized.