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:
Jun. 28, 1994
Filed:
Jun. 07, 1993
Clarence Isert, Dewberry, Alberta T0B 1G0, CA;
Other;
Abstract
There is disclosed a grease gun including a chamber with a cap on one end and head on the other end. Inside the head is a cavity which may receive grease from the chamber. Part of the cavity forms a cylinder in which reciprocates a piston. The piston in turn operates a ratchet on its upward stroke, as grease fills the cylinder. The ratchet turns a rod on which is threaded a follower. The rotation of the rod moves the follower towards the head and forces grease into the cavity and thus into the cylinder. On the downward stroke, the piston is disengaged from the ratchet and forces grease out of the cavity into a discharge conduit. Valves control movement in and out of the cavity. The ratchet is rotatably mounted outside of the chamber. Also, the grease gun preferably includes a split nut threaded on the rod adjacent the follower and a shoulder adjacent the cap and oriented to split the split nut on engagement with the split nut. A setting ring is used to reset the split nut.