Abstract: A terminal feedthrough is provided. The terminal feedthrough includes a terminal pin insert having a pair of ends. A polymeric body having an externally threaded region is disposed about the terminal pin insert to form an interface with the terminal pin insert. At least one of threads of the externally threaded region and a cylindrical pin interface is configured to provide a flame-quenching pathway.

Abstract: A terminal feedthrough is provided. The terminal feedthrough includes a terminal pin insert having a pair of ends. A polymeric body having an externally threaded region is disposed about the terminal pin insert to form an interface with the terminal pin insert. At least one of threads of the externally threaded region and a cylindrical pin interface is configured to provide a flame-quenching pathway.

Abstract: A method of controlling shifting of a multiple ratio fluid motor (10) between first and second speed ratios. The motor includes a shift valve (61) operable to achieve the second speed ratio by interconnecting recirculating volume chambers (33R). The method includes providing a pressure control valve (75) in communication with a source (73) of pressure fluid, the valve (75) being operable to communicate a pilot pressure to the shift valve in response to changes in a command signal between a first signal (113B) and a second signal (113C). When a shift to the second condition is commanded, the method changes the command signal (113) from the first to the second over a first time (T1). For a shift back to the first condition (FIG. 3), the method changes the electrical command signal (113) from the second to the first over a second time (T2), wherein T2 is greater than T1.

Abstract: A method of controlling shifting of a multiple ratio fluid motor (10) between first and second speed ratios. The motor includes a shift valve (61) operable to achieve the second speed ratio by interconnecting recirculating volume chambers (33R). The method includes providing a pressure control valve (75) in communication with a source (73) of pressure fluid, the valve (75) being operable to communicate a pilot pressure to the shift valve in response to changes in a command signal between a first signal (113B) and a second signal (113C). When a shift to the second condition is commanded, the method changes the command signal (113) from the first to the second over a first time (T1). For a shift back to the first condition (FIG. 3), the method changes the electrical command signal (113) from the second to the first over a second time (T2), wherein T2 is greater than T1.

Abstract: A two-speed gerotor motor (10) including motor valve means (19,43) to communicate fluid to and from expanding (33E) and contracting (33c) fluid volume chambers. The motor includes a shift valve spool (61) to cause the motor to operate either in the normal, low-speed, high-torque (LSHT) mode (FIG. 3) or in a high-speed, low-torque (HSLT) mode (FIG. 4). When the motor operates in HSLT mode, certain of the volume chambers comprise recirculating volume chambers (33R). The motor (10) defines a supplemental fluid passage (89) through which fluid is communicated from a system charge pump (73) to each of the recirculating volume chambers (33R). A control valve (83) is operable, in a shift mode (S) to permit fluid communication from the charge pump (73) to the supplemental fluid passage (89), thus preventing cavitation during shifting of the motor (10), especially when shifting from the HSLT mode to the LSHT mode.

Abstract: An integral brake assembly for a gerotor motor of the type including valving (41) disposed forwardly of the gerotor gear set (15). Orbital and rotational movement of the gerotor star member (31) is transmitted to an output shaft (43) by a main drive shaft (51), which includes a rearwardly extending brake portion (107). The motor includes an endcap assembly (21) defining a brake chamber (73) into which the brake portion (107) extends. A cylindrical brake member (91) is disposed in the brake chamber (73), and includes a circular surface (109) for frictional engagement with a lock piston (75). The brake member (91) also includes a forward generally annular surface (115) for frictional engagement with either the gerotor gear set (15) or an adjacent wear plate (89). The invention at least reduces the need for expensive friction discs in order to achieve a desired level of brake torque, and also utilizes inherent friction in various brake parts for some of the required brake torque.