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:
Aug. 23, 1994
Filed:
Oct. 07, 1992
Applicant:
Inventor:
Robert M Motl, West Bend, WI (US);
Assignee:
M-B-W Inc., Slinger, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01C / ;
U.S. Cl.
CPC ...
40413305 ; 104 14 ; 4041331 ;
Abstract
A pneumatically operated percussion apparatus for compacting soil, or other material. The apparatus includes a gear case that supports a percussion unit that is adapted to engage the soil to compact the same. A pneumatically operated motor is mounted on the gear case and air is supplied to the motor via a manually-operated 'deadman' valve unit. A centrifugal clutch connects the output shaft of the motor to the percussion unit. The air flow to the motor is controlled by a governor to obtain a substantially uniform rotational speed for the motor output shaft.