Semi-automatic pneumatic expansion rivet gun
US4535925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Aug 10, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53726
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A semi-automatic hand-held pneumatic gun for installing plastic rivets. The gun includes a handle equipped with a manual trigger, and an associated magazine which serially feeds a plurality of stored rivets. Repetitive semi-automatic cycling of the gun is established by cooperation between a triggered air system, an intermediate pneumatic system, and a pneumatic barrel assembly. The trigger valve establishes a plurality of pneumatic pathways between it a manifold and the intermediate pneumatic system, activating first and second intermediate valves disposed within the intermediate valve pneumatic chamber. The barrel chamber includes an elongated ram and an associated piston. When the trigger valve is in a rest position, a pneumatic path is established whereby the first intermediate valve is biased to a rest position establishing another pneumatic path biasing the piston to a rest position. When the trigger valve is pulled, it establishes another pneumatic path, coupled to the intermediate pneumatic chamber which displaces the second intermediate valve to direct high pressure air to the rear of the barrel chamber, thereby forcing the piston forwardly to contact a plunger within the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.