Power trowels
First Claim
Patent Images
1. An improvement to trowling machines having a power unit, a rotatable shaft extending downward therefrom, a plurality of trowling blades, mounting means for mounting the trowling blades to the rotatable shaft, and a shroud for shielding the blades, the improvement comprising:
- the blades being mounted to the mounting means at a selected pitch;
an attachment member fixed to the exterior of the shroud;
a manually operated throttle control including a manual grip and control element and having a short length pole, mounting means on the short pole for removably mounting the short pole to the attachment member on the shroud to control the power unit and to permit guiding the shroud from adjacent the shroud;
a power unit control coupled to the control element to control the power unit; and
an elongated pole having first and second ends and means for mounting a first end of the elongated pole to the mounting member on the shroud when the short pole is removed, and means for receiving the short pole at the second end of the elongated pole, wherein the throttle control is extendably mounted by the elongated pole.
0 Assignments
0 Petitions
Accused Products
Abstract
An improvement to power trowels having a power unit, a rotatable shaft, a plurality of trowling blades mounted to spider arms, and a shroud for shielding the blades. The blades are formed of spring steel and are fixedly mounted to the spider arms. A throttle control unit is removably mounted to the trowel and may be extendably mounted to an adjustable extendible pole.
61 Citations
24 Claims
-
1. An improvement to trowling machines having a power unit, a rotatable shaft extending downward therefrom, a plurality of trowling blades, mounting means for mounting the trowling blades to the rotatable shaft, and a shroud for shielding the blades, the improvement comprising:
-
the blades being mounted to the mounting means at a selected pitch; an attachment member fixed to the exterior of the shroud; a manually operated throttle control including a manual grip and control element and having a short length pole, mounting means on the short pole for removably mounting the short pole to the attachment member on the shroud to control the power unit and to permit guiding the shroud from adjacent the shroud; a power unit control coupled to the control element to control the power unit; and an elongated pole having first and second ends and means for mounting a first end of the elongated pole to the mounting member on the shroud when the short pole is removed, and means for receiving the short pole at the second end of the elongated pole, wherein the throttle control is extendably mounted by the elongated pole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An improvement to trowling machines having a power unit, a rotatable shaft extending downward therefrom, a plurality of trowling blades having first and second ends, mounting means for mounting the trowling blades to the rotatable shaft, and a shroud for shielding the blades, the improvement comprising:
-
the blades each being mounted to the mounting means selectively in a first position with a first end of the respective blade adjacent an outer periphery of the shroud and in a second position with a second end of the respective blade adjacent the outer periphery of the shroud, wherein the blades are formed of spring steel and are fixed at a pitch angle between the range of 5 degrees and 20 degrees from horizontal during operation; at least one throttle control connection being located on the power unit; throttle control means removably mounted to one of the throttle control connections; power unit control means mounted to the power unit to control the power unit to rotate the mounting means and blades, each blade having a different length rotationally trailing the mounting means in its respective first and second positions. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. An improvement to trowling machines having an internal combustion power unit, a rotatable drive shaft extending downward therefrom, a plurality of trowling blades, mounting means for mounting the trowling blades to the rotatable shaft, and a shroud for shielding the blades, the improvement comprising:
-
the blades being mounted to the mounting means, the blades being formed of flexible spring steel and being mounted at a pitch of angle between 5 and 20 degrees from horizontal as they move; a plurality of control connections located on the power unit including a throttle control connection to control speed of operation; a throttle control removably mounted to the throttle control connection; a power unit control removably mounted to the power unit to control the power unit, the power unit control being electrically actuated; and the shroud comprising a lower substantially vertical skirt forming a retaining ring and upper guard wall portion tapering upwardly from the skirt and extending around the entire ring to overlie and enclose regions above the blades with the guard wall, the power unit being mounted at an upper end of the upper guard wall, - View Dependent Claims (21, 22, 23)
-
-
24. An improvement to trowling machines having a power unit, rotatable shaft extending downward therefrom, a plurality of trowling blades, mounting means for mounting the trowling blades to the rotatable shaft, and a shroud for shielding the blades, the improvement comprising:
-
the blades being mounted to the mounting means at a selected pitch; an attachment member fixed to the exterior of the shroud;
a manually operated throttle control including a manual grip and control element and having a short length pole, mounting means on the short pole for removably mounting the short pole the attachment member on the shroud to control the power unit and to permit guiding the shroud from adjacent the shroud; anda power unit control coupled to the control element to control the power unit; and an extendible elongated pole of substantial length, said extendible elongated pole having two ends and having means for mounting at one end matching the means for mounting on the short pole, and an opposite end of the extendible elongated pole having a coupling to receive the means for mounting on the short pole to permit the manual grip to control and guide the unit at an outer end of the extendible elongated pole.
-
Specification