Walk-behind self-propelled broom sweeper
First Claim
1. A walk-behind self-propelled device, comprising:
- a) a main frame including a base portion and a handle portion;
b) a pair of wheels secured to said base portion for engaging the ground surface;
c) an engine mounted on said base portion;
d) a hydraulic pump carried by said base portion and operably connected to said engine;
e) a first hydraulic motor directly coupled to said wheels and operably connected to said hydraulic pump;
f) an attachment secured to said base portion;
g) a second hydraulic motor directly coupled to said attachment and operably connected to said hydraulic pump;
h) first and second valves for controlling said first and second hydraulic motors, respectively;
i) each of said first and second valves having a bypass position whereby hydraulic fluid bypasses said first and second hydraulic motors;
j) first and second handle grips operably associated with said handle portion and said first and second valves, respectively, said handle grips having non-operative positions corresponding with said first and second valves being in said bypass positions; and
k) said first and second handle grips being normally biased in said non-operative positions of said valves.
15 Assignments
0 Petitions
Accused Products
Abstract
A walk-behind self-propelled device comprises a main frame including a base portion and a handle portion; a pair of wheels secured to the base portion for engaging the ground surface; an engine mounted on the base portion; a hydraulic pump carried by the base portion and operably connected to the engine; a first hydraulic motor directly coupled to the wheels and operably connected to the hydraulic pump; an attachment secured to the base portion; a second hydraulic motor directly coupled to the attachment and operably connected to the hydraulic pump; and first and second valves for controlling the first and second hydraulic motors, respectively. Each of the first and second valves has a bypass position whereby hydraulic fluid bypasses the first and second hydraulic motors. First and second handgrips are provided for operating the first and second valves, respectively. Each of the first and second handgrips includes a non-operative position corresponding with the first and second valves being in the bypass positions and the handgrips are normally biased in the non-operative positions.
-
Citations
28 Claims
-
1. A walk-behind self-propelled device, comprising:
-
a) a main frame including a base portion and a handle portion; b) a pair of wheels secured to said base portion for engaging the ground surface; c) an engine mounted on said base portion; d) a hydraulic pump carried by said base portion and operably connected to said engine; e) a first hydraulic motor directly coupled to said wheels and operably connected to said hydraulic pump; f) an attachment secured to said base portion; g) a second hydraulic motor directly coupled to said attachment and operably connected to said hydraulic pump; h) first and second valves for controlling said first and second hydraulic motors, respectively; i) each of said first and second valves having a bypass position whereby hydraulic fluid bypasses said first and second hydraulic motors; j) first and second handle grips operably associated with said handle portion and said first and second valves, respectively, said handle grips having non-operative positions corresponding with said first and second valves being in said bypass positions; and k) said first and second handle grips being normally biased in said non-operative positions of said valves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A walk-behind self-propelled drive for powering an attachment, comprising:
-
a) a main frame including a base portion and a handle portion; b) a pair of drive wheels supporting said base frame; c) means for connecting said main frame to an attachment; d) hydraulic drive carried by said main frame and operably connected to said drive wheels and the attachment; e) said base portion including an integrated hydraulic tank for supplying hydraulic oil to said hydraulic drive; f) said handle portion including a hollow member connected to said base portion and extending upwardly therefrom and communicating with said tank; and g) said hollow member including a first opening for replacing hydraulic oil into said tank. - View Dependent Claims (17, 18, 19, 20, 21, 22)
-
-
23. A walk-behind self-propelled rotary sweeper, comprising:
-
a) a main frame including a base portion and a handle portion; b) a pair of wheels secured to said base portion for engaging the ground surface; c) an engine mounted on said base portion; d) a hydraulic pump directly connected to said engine; e) a first hydraulic motor directly coupled to said wheels and operably connected to said hydraulic pump; f) a rotary sweeper secured to said base portion; g) a second hydraulic motor directly coupled to said rotary sweeper and operably connected to said hydraulic pump; and h) means for selectively tilting and angling said rotary sweeper about horizontal and vertical axes, respectively. - View Dependent Claims (24, 25, 26, 27)
-
-
28. A walk-behind self-propelled device, comprising:
-
a) a main frame including a handle portion for a walking operator to be positioned behind thereof; b) a pair of wheels secured to said base portion for engaging the ground surface; c) a first hydraulic drive motor directly coupled to said wheels; d) an attachment secured to said frame; e) a second hydraulic drive motor directly coupled to said attachment; f) first and second control valves for independently controlling said first and second drive motors, respectively, such that said drive wheels and said attachment are activated independently g) each of said first and second valves having a bypass position whereby hydraulic fluid bypasses said first and second hydraulic motors; h) first and second handle grips operably associated with said handle portion and said first and second valves, respectively, said handle grips having non-operative positions corresponding with said first and second valves being in said bypass positions; and i) said first and second handle grips being normally biased in said non-operative positions of said valves.
-
Specification