Motorcycle compression release

Claim 2

A compression release structure for use with a vehicle combustion cylinder, comprising: a. a housing having an upper end, a lower end, a bore extending between the upper and lower ends formed with an internally threaded portion, and, an internal shoulder; b. a tubular insert with external threads coupled to the housing bore threaded portion, the insert having a lower end projecting outwardly from the housing lower end and an upper end confined in the housing and spaced from the shoulder; c. a first valve seat defined by the insert lower end; d. a second valve seat of round configuration recessed in the insert upper end; e. an elongated rod extending through the housing and tubular insert, the rod having a lower end defining a first valve for mating with the first valve seat and an upper end projecting upwardly from the housing upper end; f. a retaining cap coupled to the elongated rod upper end; g. a first spring with opposing ends engaging the housing and retaining cap and whose biasing force operates to normally urge the first valve onto its seat; h. a second valve of round configuration that is self-centering and shaped to mate with the second valve seat, the second valve having a longitudinally extending bore surrounding the elongated rod; and, i. a second spring with opposing ends engaging the second valve and housing internal shoulder and whose biasing force operates to normally urge the second valve onto its seat, the second spring causing the second valve to act as a one-way check valve; wherein when the compression release structure is incorporated in a vehicle combustion cylinder the first valve may be opened to admit compressed gases in one direction outward through the second valve and external air is prevented from flowing in the reverse direction through the second valve and into the cylinder.

Claim 3

The structure according to claim 1, wherein; the second valve and second valve seat have complementary conical-shaped sidewalls.

Claim 4

The structure according to claim 2, wherein; the angle defined by the second valve longitudinal centerline and its conical shaped side walls is between 20* and 35* .

Claim 5

The structure according to claim 3, wherein; the angle defined by the second valve longitudinal center line and its conical-shaped sidewall is 30* .

Claim 6

The structure according to claim 2, wherein; the second spring is a coil spring whose lower end fits around a boss portion of the second valve.

Claim 7

The structure according to claim 1, including: a connecting pin extending through registering openings in the housing and insert to lock the housing and insert against relative motion.

Claim 8

The structure according to claim 1, including: plural radially extending exhaust ports in the housing above the second valve seat through which compressed gases may be expelled.

Claim 9

The structure according to claim 1, including: a first guide opening extending longitudinally through the retaining cap; a second guide opening in the housing aligned in registering relationship with the first guide opening; a cable aligned in the guide openings and arranged for use in operating the first valve; and a tightening element positioned in the housing for inward motion to tightly lock the cable against the housing.

Claim 10

The structure according to claim 8, wherein; the first spring is a coil spring surrounding cable segment extending between the retaining cap and housing.

Claim 11

A compression release structure for use in a motorcycle combustion cylinder, comprising: a. a housing having an upper end, a lower end, a bore extending between the upper and lower ends and with an internally threaded portion, plural exhaust ports extending radially outwardly from the bore, and internal shoulder; b. a tubular insert with external threads coupled to the housing bore threaded portion, the insert having a loweR end projecting outwardly from the housing lower end and an upper end confined in the housing and spaced from the shoulder; c. a first valve seat defined by the insert lower end; d. a second valve seat of conical configuration recessed in the insert upper end; e. an elongated rod extending through the housing and tubular insert, the rod having a lower end defining a first valve for mating with the first valve seat and an upper end projecting upwardly from the housing upper end. f. a retaining cap coupled to the elongated rod upper end; g. a first coil spring with opposing ends engaging the retaining cap and housing and whose biasing force operates to urge the first valve onto its seat; h. a second valve that is self-centering and of conical configuration to mate with the second valve seat, the second valve having a longitudinally extending bore surrounding and sufficiently spaced from the elongated rod to facilitate self-centering action, wherein the angle defined by the second valve longitudinal centerline and its conical sidewall is between 20* and 35* ; i. a second coil spring with opposing ends engaging the housing internal shoulder and fitting over a boss portion of the second valve, the second spring-biasing force operating to normally urge the second valve onto its seat to cause the second valve to act as a one way check valve; j. a connecting pin extending through registering openings in the housing and insert to lock the housing and insert against relative motion; k. a first guide opening extending longitudinally through the retaining cap; l. a second guide opening in the housing aligned in registering relationship with the first guide opening; m. a cable aligned in the guide opening for use in operating the first valve; and, n. a tightening element positioned in the housing for inward motion to tightly lock the cable against the housing, wherein when the compression release structure is incorporated in a motorcycle cylinder the cable may be manipulated to open the first valve to admit compressed gases in one direction outwardly through the second valve and external air is prevented from flowing back in reverse direction through the second valve and into the cylinder because the second valve will automatically close before this can happen.

Claim 12

A compression release structure for use in a motorcycle combustion cylinder, comprising: a. a housing having an upper end, a lower end, a bore extending between the upper and lower ends and with an internally threaded portion, plural exhaust ports extending radially outwardly from the bore, and internal shoulder; b. a tubular insert with external threads coupled to the housing bore threaded portion, the insert having a loweR end projecting outwardly from the housing lower end and an upper end confined in the housing and spaced from the shoulder; c. a first valve seat defined by the insert lower end; d. a second valve seat of conical configuration recessed in the insert upper end; e. an elongated rod extending through the housing and tubular insert, the rod having a lower end defining a first valve for mating with the first valve seat and an upper end projecting upwardly from the housing upper end. f. a retaining cap coupled to the elongated rod upper end; g. a first coil spring with opposing ends engaging the retaining cap and housing and whose biasing force operates to urge the first valve onto its seat; h. a second valve that is self-centering and of conical configuration to mate with the second valve seat, the second valve having a longitudinally extending bore surrounding and sufficiently spaced from the elongated rod to facilitate self-centering action, wherein the angle defined by the second valve longitudinal centerline and its conical sidewall is between 20* and 35* ; i. a second coil spring with opposing ends engaging the housing internal shoulder and fitting over a boss portion of the second valve, the second spring-biasing force operating to normally urge the second valve onto its seat to cause the second valve to act as a one way check valve; j. a connecting pin extending through registering openings in the housing and insert to lock the housing and insert against relative motion; k. a first guide opening extending longitudinally through the retaining cap; l. a second guide opening in the housing aligned in registering relationship with the first guide opening; m. a cable aligned in the guide opening for use in operating the first valve; and, n. a tightening element positioned in the housing for inward motion to tightly lock the cable against the housing, wherein when the compression release structure is incorporated in a motorcycle cylinder the cable may be manipulated to open the first valve to admit compressed gases in one direction outwardly through the second valve and external air is prevented from flowing back in reverse direction through the second valve and into the cylinder because the second valve will automatically close before this can happen.