Concrete saw
AssigneeDiamond Products, Limited
InventorsMartin D. Marsic, Kent A. Smith, Brian S. Edwards
Life of this patent
Estimating the term…
Abstract
A concrete saw having a geared assembly for rotating a cutting blade is described. The saw utilizes a longitudinally oriented engine for rotating the blade. Various additional features and improvements are described including a particular belt tensioner assembly, an indicator and control system for cutting blade depth, a handle adjustment and locking system, and provisions for control of blade water are described.
Claims20
A concrete saw blade depth control system for a concrete saw including a frame, a wheel assembly mounted on a pivotable carriage, and a hydraulic ram extending between the frame and the carriage for selectively positioning the carriage and changing the blade depth, the blade depth control system comprising:
- a linearly positionable actuator rod;
- an electric motor operably engaged with the rod for selectively positioning the rod relative to the frame;
- and
- a slide member carrying a proximity sensor in sensing range of the actuator rod, the slide member mechanically coupled to the carriage such that changing the position of the carriage displaces the slide member and proximity sensor;
- wherein a change in the relative position of the slide member and the proximity sensor to the actuator rod enables the proximity sensor to provide a signal indicative of such position change.
A concrete saw with a selectively adjustable and locking handle assembly, the saw including an upper frame assembly, the handle assembly comprising:
- a pair of handles spaced apart from one another;
- a handle cross member extending between and secured to the pair of handles;
- a pair of shoulder members affixed to the upper frame assembly, each shoulder member including a collar for rotatably receiving and supporting the handle cross member;
- and
- a hydraulic handle adjusting system engaged to an end of at least one of the handles, the hydraulic adjusting system including a cylinder secured to the upper frame and a ram receivably engaged with the cylinder, the ram coupled to at least one of the handles, and a selectively operable valve in fluid communication with the ram for controlling positioning of the ram and the pair of handles.
A concrete saw blade depth indicator and control system for a concrete saw including a frame, a wheel assembly mounted on a pivotable carriage, the position of the carriage governing the blade depth, the blade depth indicator and control system comprising:
- a controller including a rotatable indicator knob, a rotatable drive member in engagement with the indicator knob, a rotatable cam member in operable association with the drive member, and a switch actuatable according to the rotary position of the cam member;
- a cable in engagement with the drive member such that movement of the cable along its longitudinal axis induces rotary movement of the drive member, the cable defining a first end affixed to the frame, and a second end affixed to the carriage;
- wherein a change in the position of the carriage causes movement of the cable and rotation of the drive member, which actuates the switch by action of the cam member.
Dependencies are inferred from the claim text.